18th Symposium on Boundary Layers and Turbulence (9

MON. 9 JUNE

Session 1

WELCOME & EKMAN LECTURE

Location: Aula Magna (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Gunilla Svensson, Stockholm University

9:00 AM

Welcoming Remarks by Stockholm University Vice-Chancellor, Kåre Bremer

9:15 AM

Welcoming Remarks by Program Chairperson, Gunilla Svensson

9:30 AM

1.1

Ekman Lecture: The Planetary Boundary Layer: What We Know Now and Where to Go Next

Donald H. Lenschow, NCAR, Boulder, CO

9:45 AM

Discussion

COFFEE BREAK

Session 2

BOUNDARY LAYER PROCESSES IN GLOBAL AND REGIONAL CLIMATE OR WEATHER PREDICTION MODELS—I

Location: Aula Magna (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Gunilla Svensson, Stockholm University

10:30 AM

2.1

Modeling atmospheric boundary layers for climate studies

Albert A.M. Holtslag, Wageningen University, Wageningen, Netherlands; and G. Svensson, P. J. Rasch, and W. Large

10:45 AM

2.2

Assessment of numerical weather forecasts against near-surface observations over an annual cycle

John M. Edwards, Met Office, Exeter, United Kingdom; and J. McGregor, M. R. Bush, and F. J. Bornemann

Presentation PDF (263.1 kB)

11:00 AM

2.3

Simulating atmosphere flow for wind energy applications with WRF-LES

Julie K. Lundquist, University of Colorado at Boulder, Boulder, CO; and J. D. Mirocha, F. K. Chow, B. Kosovic, and K. A. Lundquist

11:15 AM

2.4

Scaling analysis of the turbulent kinetic energy at the entrainment zone in sheared convective boundary layers

David Pino, Technical University of Catalonia, Castelldefels, Spain; and J. Vilà-Guerau de Arellano

Presentation PDF (271.3 kB)

11:30 AM

2.5

Quantifying the effects of mesoscale motion

Thorsten Mauritsen, Stockholm University, Stockholm, Sweden

11:45 AM

2.6

New entrainment rate parameterization for a unified PBL scheme

Cara-Lyn Lappen, Colorado State University, Fort Collins, CO; and D. A. Randall

LUNCH BREAK

Session 3

BOUNDARY LAYER PROCESSES IN GLOBAL AND REGIONAL CLIMATE OR WEATHER PREDICTION MODELS—II

Location: Aula Magna (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Branko Kosovic, LLNL

1:30 PM

3.1

Resolvability of small-scale non-turbulent motions in the boundary layer by numerical models

Danijel Belusic, University of Zagreb, Zagreb, Croatia; and L. Mahrt and B. Grisogono

3.2

Boundary layer properties in a numerical weather forecast model

2:00 PM

3.3

Boundary layer evolution under compensatory mesoscale circulations

Millan M. Millan, Fundacion CEAM, Paterna, Valencia, Spain; and E. Mantilla and R. Salvador

2:15 PM

3.4

Synoptic controls on boundary layer structure

Victoria A. Sinclair, University of Helsinki, Helsinki, Finland; and S. E. Belcher and S. L. Gray

2:30 PM

3.5

The role of boundary layer processes in mid-latitude cyclones

Stephen E. Belcher, University of Reading, Reading, Berks., United Kingdom; and I. Boutle, R. S. Plant, and R. J. Beare

2:45 PM

3.6

Impact of a swell-dependent roughness parameter in a regional climate model

Björn Carlsson, Uppsala University, Uppsala, Sweden; and A. Rutgersson and A. S. Smedman

COFFEE BREAK

Session 4

STABLE BOUNDARY LAYERS—I

Location: Aula Magna (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Cheryl L. Klipp, U.S. Army Research Laboratory

3:30 PM

4.1

Mesoscale motions and their influence on turbulence in stable conditions

Larry Mahrt, NorthWest Research Associates, Inc., Corvallis, OR

3:45 PM

4.2

Modeling turbulent fluxes in heterogeneous thermally stratified boundary layers

Fernando Porté-Agel, École Polytechnique Fédérale de Lausanne; and University of Minnesota, Lausanne, Vaud, Switzerland; and L. Chamorro Sr., R. Stoll, and J. Tucker

4:00 PM

4.3

Observations of turbulence in the residual layer

Michael Tjernström, University of Stockholm, Stockholm, Sweden; and B. B. Balsley, G. Svensson, and C. J. Nappo

4:15 PM

4.4

Small-scale atmospheric turbulence in very stable conditions

Andrey A. Grachev, CIRES/Univ. of Colorado, Boulder, CO; and E. L. Andreas, C. W. Fairall, P. S. Guest, and P. O. G. Persson

4:30 PM

4.5

Low-level-jet scaling of the stable boundary layer over the United States Great Plains

Robert M. Banta, NOAA/ESRL, Boulder, CO; and Y. L. Pichugina, N. D. Kelley, and W. A. Brewer

Presentation PDF (2.0 MB)

4:45 PM

4.6

Sergej Zilitinkevich, University of Helsinki, Helsinki, Finland; and I. Esau

ICEBREAKER RECEPTION AND FORMAL POSTER VIEWING

Poster Session 1

BOUNDARY LAYER PROCESSES IN GLOBAL AND REGIONAL CLIMATE OR WEATHER PREDICTION MODELS

Host: 18th Symposium on Boundary Layers and Turbulence

P1.1

The Quality of Horizontal Advective Tendencies in Atmospheric Models

Fred C. Bosveld, KNMI, De Bilt, Netherlands; and E. Van Meijgaard, C. De Bruijn, and G. J. Steeneveld

Handout (1.3 MB)

P1.2

Using a Network of Scintillometers and Ceilometers for Validation of the WRF-mesoscale Model

Gert-Jan Steeneveld, Wageningen University, Wageningen, Netherlands; and O. K. Hartogensis, A. F. Moene, H. K. Baltink, and A. A. M. Holtslag

Handout (930.3 kB)

P1.3

A conditional sampling of boundary layer plumes for the validation of mass flux parameterizations

Fleur Couvreux, Meteo-France, Toulouse, France; and C. Rio

P1.4

Analytical-Numerical Solutions for the One Dimensional PBL

Janis Rimshans, University of Latvia, Riga, Latvia; and I. Esau, S. Zilitinkevich, and S. Guseynov

Handout (153.5 kB)

P1.5

Improving mixing length-scale for the stable boundary layer in mesoscale models

Branko Grisogono, University of Zagreb, Zagreb, Croatia; and D. Belusic

P1.6

Assessment of the Canadian urban modeling system using Joint Urban 2003 observations over Oklahoma City

Jocelyn Mailhot, EC, Dorval, QC, Canada; and A. Lemonsu and S. Bélair

P1.7

Improving Mellor-Yamada-Janjic boundary layer parameterization, case of marine atmospheric boundary layer

Kay Suselj, University of Oldenburg, Oldenburg, Germany; and A. Sood

P1.8

The transition from stratus topped to trade-wind cumulus topped marine boundary layer in global climate models

Johannes Karlsson, JPL, Pasadena, CA; and G. Svensson, J. Teixeira, and S. S. Cardoso

P1.9

The diurnal cycle of the near surface temperature, wind and surface exchange in the NCAR CCSM

Gunilla Svensson, Stockholm University, Stockholm, Sweden; and A. A. M. Holtslag, P. J. Rasch, and W. Large

P1.10 moved. New Paper Number P5.4

P1.11

Urbanized MM5 simulations for urban heat island, regional ozone, and urban-scale emergency-response applications

Robert D. Bornstein, San Jose State University, San Jose, CA; and E. Weinroth, R. Balmori, and H. Taha

Poster Session 2

OBSERVATIONAL METHODS AND REMOTE SENSING

Host: 18th Symposium on Boundary Layers and Turbulence

P2.1

Sodar retrievals of the temperature structure parameter

P2.2

Comparison of vertical boundary-layer profiles from AMDAR to a wind profiler

C. Drüe, University of Hannover, Hannover, Germany; and A. Hoff and T. Hauf

P2.3

A balloon-borne turbulence system

P2.4

Turbulence effects on wind turbines: A wind-tunnel study

Leonardo Chamorro, University of Minnesota, Minneapolis, MN; and H. Lu and F. Porté-Agel

P2.5

Influence of turbulent mixing and air circulation in the lower atmosphere on fetch areas of selected WMO Global Atmosphere Watch baseline air pollution stations

Wlodek Zahorowski, Australian Nuclear Science and Technology Organisation, Menai, NSW, Australia; and S. Chambers, C. H. Kang, J. Crawford, S. Werczynski, and A. G. Williams

Handout (367.1 kB)

P2.6

ModObs: “Atmospheric modelling for wind energy, climate and environment applications: exploring added value from new observation technique”. Work in progress within an European FP6 Marie Curie Research Training Network

Anna Maria Sempreviva, Italian National Council of Research / Institute of Atmospheric Sciences and Climate, Lamezia Terme, Italy; and L. L. Soerensen Sr., H. E. Joergensen Sr., A. Sood, B. Tammelin Sr., T. Vimha, T. Neumann, F. Chêruy Sr., G. Liberti Sr., A. Lanotte Sr., U. Rizza Sr., M. Miglietta Sr., A. Rutgersson, A. S. Smedman Sr., I. Esau, L. E. Jensen Sr., L. C. Christensen Sr., B. Furevik Sr., O. Saetra Sr., M. Khalil, R. Wagner, K. Suselj, B. Canadillas, L. Claveri, A. Catarino, M. Cassol Jr., L. Velea Jr., A. Semedo, and T. Hansson

P2.7

The spectral dynamics analysis of the transitions periods in the convective boundary Layer

A. Goulart, Universidade Federal do Pampa, Alegrete, Brazil; and M. T. Vilhena, P. M. M. Soares, and D. M. Moreira

P2.8

Spatial features of bora related turbulence

ŽEljko Vecenaj, University of Zagreb, Zagreb, Croatia; and D. Belusic, V. Grubisic, and B. Grisogono

P2.9

Atmospheric turbulence characteristics in central London

Curtis R. Wood, University of Reading, Reading, United Kingdom; and J. Barlow, S. E. Belcher, A. Dobre, A. Tomlin, A. Balogun, J. Tate, A. Robins, S. Arnold, D. Martin, D. Shallcross, R. Britter, M. Neophytou, R. Colville, H. Apsimon, and H. Wang

TUE. 10 JUNE

Session 5A

BOUNDARY LAYER PROCESSES IN GLOBAL AND REGIONAL CLIMATE OR WEATHER PREDICTION MODELS—III

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Jordi Vila, Wageningen University

9:00 AM

5A.1

Sensitivity study of simulated wind profiles to model resolution, land cover and climate forcing data

Janna Lindenberg, GKSS Research Center, Geesthacht, Germany; and H. T. Mengelkamp and W. Yu

Presentation PDF (1.3 MB)

9:15 AM

5A.2

Study of the effect of the QNSE-based surface layer parameterization on the warm bias in simulations of stably stratified boundary layers

Boris Galperin, University of South Florida, St. Petersburg, FL; and S. Sukoriansky and E. Atlaskin

9:30 AM

5A.3

Evaluating the RAMS to represent the Stable Boundary Layer in the South America Pampa

Osvaldo Moraes, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil; and R. D. C. M. Alves, O. C. Acevedo, H. Zimermann Sr., and C. Teichrieb

9:45 AM

5A.4

Effect of climate change on regional surface layer winds

Jeffrey M. Freedman, AWS Truewind LLC, Albany, NY; and K. T. Waight, M. Brower, and P. Duffy

Session 5B

OBSERVATIONAL METHODS—I

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Harm J. J. Jonker, Delft University of Technology

9:00 AM

5B.1

New developments in field experiments in ASL: Kolmogorov 4/5 law and non-locality

Michael Kholmyansky, Tel-Aviv University, Tel-Aviv, Israel; and V. Sabelnikov and A. Tsinober

Presentation PDF (1.4 MB)

9:15 AM

5B.2

Attenuation of scalar fluxes measured with vertically displaced sensors

Thomas W. Horst, NCAR, Boulder, CO

Presentation PDF (100.1 kB)

9:30 AM

5B.3

Scaling properties of temperature spectra in the surface friction layer

Johannes Laubach, Manaaki Whenua - Landcare Research, Lincoln, New Zealand; and K. G. McNaughton

Presentation PDF (254.0 kB)

9:45 AM

5B.4

Ten years of operational measurements at the boundary layer field site of the Meteorological Observatory Lindenberg / Richard – Aßmann Observatory (DWD)

Frank Beyrich, German Meteorological Service, Lindenberg, Germany; and C. Heret, S. H. Richter, U. Rummel, G. Vogel, and U. Weisensee

COFFEE BREAK

Location: Aula Magna Vänster

Session 6A

BOUNDARY LAYER PROCESSES IN GLOBAL AND REGIONAL CLIMATE OR WEATHER PREDICTION MODELS—IV

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Jordi Vila, Wageningen University

10:30 AM

6A.1

Evaluation of a combined local and non-local closure PBL model in both WRF and CMAQ simulations compared to observed vertical profiles of meteorological and chemical species

Jonathan E. Pleim, EPA, Research Triangle Park, NC; and R. Gilliam and S. Yu

10:45 AM

6A.2

A parameterization with wave saturation adjustment of subgrid-scale average wave stress over three-dimensional topography

Carmen J. Nappo, NOAA/ARL/ATDD, Oak Ridge, TN; and G. Svensson

Presentation PDF (2.5 MB)

11:00 AM

6A.3

Stably stratified boundary layer simulations with a non-local closure model

N. M. Colonna, Università del Piemonte Orientale, Alessandria, Italy; and E. Ferrero and U. Rizza

Presentation PDF (210.8 kB)

11:15 AM

6A.4

Conceptual analysis of the non-stationarity of wind fields in the CBL

Joel Schröter, Wageningen University, Wageningen, Netherlands; and A. F. Moene and A. A. M. Holtslag

11:30 AM

6A.5

A boundary layer scheme for mesoscale models using current science

Wayne M. Angevine, CIRES, University of Colorado, and NOAA/ESRL, Boulder, CO; and T. Mauritsen

Presentation PDF (217.3 kB)

11:45 AM

6A.6

The Scaling Behaviour of a Turbulent Kinetic Energy Closure Model for Stably Stratified Conditions

P. Baas, KNMI, De Bilt, Netherlands; and S. R. De Roode and G. Lenderink

12:00 PM

6A.7

Accounting for the effect sub-grid scale emission variability on upper-air concentration

Stefano Galmarini, Joint Research Centre of the European Commission, Ispra, Italy; and J. F. Vinuesa and A. Martilli

Session 6B

OBSERVATIONAL METHODS—II

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Harm J. J. Jonker, Delft University of Technology

10:30 AM

6B.1

Taking the pulse of the monsoon flux over West Africa prior to the monsoon onset

Fleur Couvreux, Meteo-France, Toulouse, France; and F. Guichard, O. Bock, J. P. Lafore, J. L. Redelsperger, M. Lothon, and F. Said

10:45 AM

6B.2

Observational verification of urban surface roughness parameters derived from morphological models

Gang Liu, Nanjing University, Nanjing, China; and J. Sun

Presentation PDF (466.5 kB)

11:00 AM

6B.3

SUMO: A Small Unmanned Meteorological Observer for atmospheric boundary layer research

Joachim Reuder, Geophysical Institute, University of Bergen, Bergen, Norway; and P. Brisset, M. Müller, M. Jonassen, and S. Mayer

Presentation PDF (501.6 kB)

11:15 AM

6B.4

First wind measurements with the Meteorological UAV 'M2AV Carolo'

Aline C. Van den Kroonenberg, Technical University, Braunschweig, Germany; and T. Spieß and J. Bange

Presentation PDF (378.8 kB)

11:30 AM

6B.5

Temporal variability of energy and mass fluxes at a residential site in a tropical city

Matthias Roth, National University of Singapore, Singapore, Singapore; and C. Jansson

11:45 AM

6B.6

Further development of the Tethersonde instrument

M. J. Hobby, National Centre for Atmospheric Science, Leeds, West Yorkshire, United Kingdom; and S. D. Mobbs and A. M. Blyth

Presentation PDF (738.7 kB)

12:00 PM

6B.7

Experimental validation of the Webb correction for CO2 flux with an open-path gas analyzer

Osamu Tsukamoto, Okayama University, Okayama, Japan; and F. Kondo

Presentation PDF (220.0 kB)

LUNCH BREAK

Location: Aula Magna Vänster

Session 7A

BOUNDARY LAYER PROCESSES IN GLOBAL AND REGIONAL CLIMATE OR WEATHER PREDICTION MODELS—V

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: John M. Edwards, Met Office

1:30 PM

7A.1

Do we need to account for lakes in climate and NWP modelling?

Patrick Samuelsson, Swedish Meteorological and Hydrological Institute, Norrköping, Sweden; and E. Kuorzeneva and D. Mironov

Presentation PDF (540.3 kB)

1:45 PM

7A.2

Idealized studies with the new urban scheme of the Met Office Unified Model

Aurore Porson, Met Office, Exeter, UK, Exeter, United Kingdom; and S. I. Bohnenstengel, S. Belcher, P. Clark, and I. N. Harman

Presentation PDF (111.4 kB)

2:00 PM

7A.3

Sensitivity to morphology in urban boundary layer modeling at the mesoscale

David D. Flagg, York University, Toronto, ON, Canada; and P. A. Taylor

Presentation PDF (257.2 kB)

7A.4

Idealized simulations of the interaction between wind farms and the atmospheric boundary layer

2:30 PM

7A.5

Tests of RANS-based PBL schemes against LES, RUC, and tall tower data

Robert Conzemius, Windlogics, Inc., Grand Rapids, MN; and D. Moon

Presentation PDF (224.0 kB)

2:45 PM

7A.6

An improved turbulence model for atmospheric boundary Layer over earth's surface with large-scale roughness and local thermal inhomogeneity

A.F. Kurbatskiy, Khristianovich Institute & Russian Academy of Sciences, Novosibirsk, Russia; and L. I. Kurbatskaya

Session 7B

PRECISION REMOTE SENSING OF THE PBL—I

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Robert M. Banta, NOAA/ERL/ETL

1:30 PM

7B.1

Measurements of turbulence structure in the daytime convective boundary layer from a ground-based Doppler lidar

Marie Lothon, Université de Toulouse, Campistrous, France; and D. H. Lenschow and S. D. Mayor

Presentation PDF (641.9 kB)

1:45 PM

7B.2

Measurements of turbulent kinetic energy dissipation rate derived from Doppler lidar

Ewan J. O'Connor, University of Reading, Reading, Berks., United Kingdom; and R. J. Hogan, A. J. Illingworth, and C. D. Westbrook

7B.3

Simultaneous measurements of water vapor and temperature with a scanning Raman lidar

2:15 PM

7B.4

Turbulence, shear and stability influences on lower boundary-layer wind profiles

Kathleen E. Moore, Integrated Environmental Data, LLC, Berne, NY; and B. H. Bailey

Presentation PDF (478.5 kB)

7B.5

High accuracy wind shear measurement with a compact pulsed Coherent Doppler Lidar

2:45 PM

7B.6

Nocturnal boundary layer height estimate from Doppler lidar measurements

Yelena L. Pichugina, CIRES/Univ. of Colorado and NOAA/ESRL, Boulder, CO; and R. M. Banta

Presentation PDF (947.5 kB)

COFFEE BREAK

Session 8B

PRECISION REMOTE SENSING OF THE PBL—II

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Robert M. Banta, NOAA/ERL/ETL

3:30 PM

8B.1

Visualisation of turbulent exchange using a thermal camera

Roland Vogt, University of Basel, Basel, Switzerland

3:45 PM

8B.2

First Results of an Optical and Millimeter Wave Scintillometer system at the Chilbolton test range

Oscar K. Hartogensis, Wageningen University, Wageningen, Netherlands; and B. Van Kesteren, J. G. Evans, J. Bradford, A. F. Moene, and A. A. M. Holtslag

4:00 PM

8B.3

Understanding the scintillometer signal: spatial variability of structure parameters using wavelet analysis

Arnold F. Moene, Wageningen University, Wageningen, Netherlands; and B. Gioli

4:15 PM

8B.4

Structure function calculations of convective turbulence during COPS

Fay Davies, Univ. of Salford, Salford, United Kingdom; and C. G. Collier and G. N. Pearson

Presentation PDF (262.9 kB)

4:30 PM

8B.5

Boundary layer structure & aerosol properties: lidar retrievals and in-situ measurements

Ian M. Brooks, University of Leeds, Leeds, West Yorkshire, United Kingdom; and B. J. Brooks, A. J. Illingworth, C. L. Wrench, J. Agnew, E. O'Conner, S. J. Norris, and C. E. Birch

Presentation PDF (224.0 kB)

Session 8A

GABLS

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Albert A.M. Holtslag, Wageningen University

3:30 PM

8A.1

The second GABLS experiment—what did we learn?

Gunilla Svensson, Stockholm University, Stockholm, Sweden; and A. A. M. Holtslag

3:45 PM

8A.2

Large-eddy simulations of the diurnal cycle in the atmospheric boundary layer and the impact of land surface conditions and geostrophic forcings

Vijayant Kumar, Johns Hopkins University, Baltimore, MD; and C. Meneveau, M. B. Parlange, G. Svensson, and A. A. M. Holtslag

4:00 PM

8A.3

From the GABLS's result to the ARPEGE NWP system: an easy ride?

Eric Bazile, Météo-France, Toulouse, France; and Y. Bouteloup, F. Bouyssel, and P. Marquet

Presentation PDF (794.9 kB)

4:15 PM

8A.4

Towards a third Intercomparison Case for GABLS using Cabauw Data

P. Baas, Delft University of Technology, Delft, Netherlands; and F. C. Bosveld, G. J. Steeneveld, and A. A. M. Holtslag

Presentation PDF (308.5 kB)

4:30 PM

8A.5

Intercomparison of Single-column Models for GABLS3 preliminary Results

Fred C. Bosveld, KNMI, De Bilt, Netherlands; and C. De Bruijn and A. A. M. Holtslag

Presentation PDF (357.1 kB)

8A.6

The KNMI Parameterization Testbed: Motivation, Configuration and Preliminary results

5:00 PM

8A.7

Large-Eddy Simulation Intercomparison Case Setup for GABLS3

Sukanta Basu, Texas Tech University, Lubbock, TX; and G. J. Steeneveld, A. A. M. Holtslag, and F. C. Bosveld

INTERNATIONAL RECEPTION AT STOCKHOLM CITY HALL

WED. 11 JUNE

Session 9A

LAND-SURFACE-PBL COUPLING—I

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Wayne M. Angevine, CIRES, University of Colorado, and NOAA/ESRL

9:00 AM

9A.1

Analysis and classification of flows over gently sloping terrain within patchy vegetation

Sean Arms, University of Oklahoma, Norman, OK; and P. M. Klein and E. Fedorovich

9:15 AM

9A.2

Determination of temperature roughness length for built environment with high resolution wireless meteorological stations

Daniel Nadeau, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; and E. Bou-Zeid, M. B. Parlange, G. Barrenetxea, and M. Vetterli

Presentation PDF (1.4 MB)

9:30 AM

9A.3

A coupled canopy-soil model for the simulation of the modification of atmospheric turbulence by tall vegetation

Edward G. Patton, NCAR, Boulder, CO; and J. C. Weil and P. P. Sullivan

Presentation PDF (31.8 kB)

9:45 AM

9A.4

Characteristics of Canopy Turbulence during the Transition from Convective to Stable Stratification

E. van Gorsel, CSIRO, Canberra, ACT, Australia; and J. J. Finnigan, I. N. Harman, and R. Leuning

Presentation PDF (1.0 MB)

Session 9B

LARGE EDDY SIMULATIONS AND FUNDAMENTAL STUDIES—I

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Fernando Porté-Agel, École Polytechnique Fédérale de Lausanne; and University of Minnesota

9:00 AM

9B.1

The diurnal evolution of 222-Rn and its progeny in the atmospheric boundary layer

Jean-François Vinuesa, Joint Research Centre of the European Commission, Ispra, Italy; and S. Basu and S. Galmarini

9:15 AM

9B.2

Diurnal boundary layer mixing patterns characterised by radon gradient observations at Cabauw

Wlodek Zahorowski, Australian Nuclear Science and Technology Organisation, Menai, NSW, Australia; and A. G. Williams, A. Vermeulen, S. Chambers, J. Crawford, and O. Sisoutham

Presentation PDF (156.9 kB)

9:30 AM

9B.3

A new surface boundary condition for LES over a rough-to-smooth transition: experimental and numerical tests

Leonardo Chamorro, University of Minnesota, Minneapolis, MN; and F. Porté-Agel

Presentation PDF (348.9 kB)

9:45 AM

9B.4

Mixing and venting in clear and cloudy boundary layers using airborne radon measurements

Alastair G. Williams, Australian Nuclear Science and Technology Organisation, Sydney, NSW, Australia; and W. Zahorowski, S. Chambers, J. Hacker, P. Schelander, A. Element, S. Werczynski, and A. Griffiths

Presentation PDF (183.4 kB)

COFFEE BREAK

Session 10A

LAND-SURFACE-PBL COUPLING—II

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Wayne M. Angevine, CIRES, University of Colorado, and NOAA/ESRL

10:30 AM

10A.1

Exchange processes in mountainous regions during the EGER 2007 micrometeorological experiment

Andrei Serafimovich, University of Bayreuth, Bayreuth, Germany; and L. Siebicke, K. Staudt, T. Foken, F. X. Meixner, E. Falge, and C. Zetzsch

Presentation PDF (583.9 kB)

10:45 AM

10A.2

Reasons for the breakdown of Monin-Obukhov similarity theory above rough surfaces

Jan H. Schween, University of Cologne, Cologne, NRW, Germany

11:00 AM

10A.3

Turbulent heat fluxes in the atmospheric surface layer: comparison of scintillometer measurements with eddy-covariance and gradient methods

Jose M. Galvez, University of Oklahoma, Norman, OK; and P. Klein and S. Arms

11:15 AM

10A.4

Evaluation of footprints in homogeneous and inhomogeneous terrain with a Lagrangian stochastic particle model embedded into a large eddy simulation model

Gerald Steinfeld, Leibniz University, Hannover, Germany; and S. Raasch, T. Markkanen, and T. Foken

11:30 AM

10A.5

Simple modification of two-equation models for non-neutral flow

Andrey Sogachev, Risø National Laboratory for Sustainable Energy, Roskilde, Denmark; and O. Panferov and T. Vesala

Presentation PDF (653.6 kB)

11:45 AM

10A.6

Spatial variability of vertical and horizontal turbulent fluxes above a boreal forest

Meelis Mölder, Lund University, Lund, Sweden; and C. Feigenwinter and A. Lindroth

Presentation PDF (74.0 kB)

12:00 PM

10A.7

Imposing land-surface fluxes at an immersed boundary for improved simulations of atmospheric flow over complex terrain

Katherine A. Lundquist, University of California, Berkeley, CA; and F. K. Chow, J. K. Lundquist, and J. D. Mirocha

Presentation PDF (926.6 kB)

Session 10B

LARGE EDDY SIMULATIONS AND FUNDAMENTAL STUDIES—II

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Fernando Porté-Agel, École Polytechnique Fédérale de Lausanne; and University of Minnesota

10:30 AM

10B.1

Footprint Application to Long-term CO2 Flux Observations

Natascha Kljun, Swansea University, Swansea, United Kingdom; and L. Chasmer, A. G. Barr, T. A. Black, C. Hopkinson, J. H. McCaughey, M. W. Rotach, and H. P. Schmid

Presentation PDF (931.8 kB)

10:45 AM

10B.2

Boundary layer high order concentration statistics

Luca Mortarini, University of Piemonte Orientale, Alessandria, Italy; and E. Ferrero and P. Franzese

Presentation PDF (852.7 kB)

11:00 AM

10B.3

A new scaling term for use in roughness sublayers

Cheryl L. Klipp, U.S. Army Research Laboratory, Adelphi, MD

Presentation PDF (326.1 kB)

11:15 AM

10B.4

Processes involved in the diurnal cycle of the Planetary Boundary Layer in the frame of the West African Monsoon

Marie Lothon, Université de Toulouse, Campistrous, France; and G. Canut, F. Saïd, F. Lohou, B. Campistron, F. Couvreux, and F. Guichard

Presentation PDF (651.3 kB)

11:30 AM

10B.5

Modelling the dust-laden Martian boundary layer

Richard Davy, Nansen Environmental and Remote Sensing Center, Bergen, Hordaland, Norway; and P. A. Taylor, W. Weng, and P. Y. Li

Presentation PDF (304.9 kB)

11:45 AM

10B.6

Large Eddy Simulation of vertical vortices in highly convective Martian boundary layer

Babak Tavakoli Gheynani, Centre for Research in Earth and Space Science (CRESS), Toronto, ON, Canada; and P. A. Taylor

Presentation PDF (356.4 kB)

12:00 PM

10B.7

A posteriori subgrid-scale model tests based on the conditional means of subgrid-scale stress and its production rate

Qinglin Chen, Clemson University, Clemson, SC; and M. J. Otte, P. P. Sullivan, and C. Tong

Presentation PDF (351.2 kB)

12:15 PM

10B.8

Large-eddy simulation of dust devils in the atmospheric boundary layer

Theres Franke, University of Hannover, Hannover, Germany; and S. Raasch

LUNCH BREAK

Session 11A

LAND-SURFACE-PBL COUPLING—III

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Wayne M. Angevine, CIRES, University of Colorado, and NOAA/ESRL

1:30 PM

11A.1

Providing high-resolution surface conditions using a coupled land-surface groundwater model: effects on atmospheric boundary layer simulations over Owens Valley, CA

Megan H. Daniels, University of California, Berkeley, CA; and F. K. Chow and R. M. Maxwell

Presentation PDF (634.2 kB)

1:45 PM

11A.2

Canopy dynamics and the surface energy balance

Ian N. Harman, CSIRO Marine and Atmospheric Research, Canberra, Australia; and J. J. Finnigan

Presentation PDF (649.0 kB)

2:00 PM

11A.3

Impact of different surface layer schemes on surface fluxes in the Noah land model used at NCEP

Michael Ek, NOAA/NWS/NCEP, Camp Springs, MD; and K. Mitchell, Y. Xia, H. Wei, X. Zeng, B. Livneh, and A. Slater

2:15 PM

11A.4

Onset of drainage currents in flows over forested hills

Stephen E. Belcher, University of Reading, Reading, Berks., United Kingdom; and J. J. Finnigan and I. N. Harman

2:30 PM

11A.5

Lagrangian particle modeling of dispersion in planetary boundary layers with and without a plant canopy

Jeffrey C. Weil, CIRES/Univ. of Colorado, Boulder, CO; and E. G. Patton and P. P. Sullivan

2:45 PM

11A.6

Dynamic significance of Hudson valley channeling

David R. Fitzjarrald, University at Albany / SUNY, Albany, NY; and M. A. Jimenez Jr., J. Cuxart, and J. M. Freedman

Session 11B

LARGE EDDY SIMULATIONS AND FUNDAMENTAL STUDIES—III

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Cheryl L. Klipp, U.S. Army Research Laboratory

1:30 PM

11B.1

Impact of terrain heterogeneities on coherent structures properties in the surface layer: experimental and numerical approaches

Clément Fesquet, IPSL, Palaiseau, France; and S. Dupont, P. J. Drobinski, C. Barthlott, and T. Dubos

1:45 PM

11B.2

Enabling large eddy simulations with the Weather Research and Forecasting model via improved subfilter-scale turbulence models

Jeffrey D. Mirocha, LLNL, Livermore, CA; and F. K. Chow, J. K. Lundquist, B. Kosovic, and K. A. Lundquist

2:00 PM

11B.3

The need for caution when interpreting velocity field structures predicted by LES

Francis L. Ludwig, Stanford University, Stanford, CA; and F. K. Chow and R. L. Street

Presentation PDF (2.3 MB)

2:15 PM

11B.4

Simulation of the morning transition boundary layer

Robert John Beare, University of Exeter, Exeter, United Kingdom

Presentation PDF (144.8 kB)

2:30 PM

11B.5

A highly parallel algorithm for turbulence simulations in planetary boundary layers: Results with meshes up to 2048³

Peter P. Sullivan, NCAR, Boulder, CO; and E. G. Patton

Presentation PDF (1.3 MB)

2:45 PM

11B.6

Vorticity dynamics in the PBL using a vector-vorticity LES model

Chin-Hoh Moeng, NCAR, Boulder, CO; and A. Arakawa, J. H. Jung, R. Rotunno, and P. P. Sullivan

3:00 PM

11B.7

Laboratory Experiments on Entrainment—a Comparison of Two-Layer Systems with Linearly Stratified Systems

Harm J. J. Jonker, Delft University of Technology, Delft, Netherlands; and M. A. Jimenez Jr., P. Lijdsman, J. Lebouille, and D. Abrahams

FREE TIME TO VISIT SKANSEN (FREE ENTRY) PRIOR TO THE BANQUET OR VISIT THE VASA MUSEUM (SEPARATE ENTRY FEE)

SYMPOSIUM BANQUET AT SOLLIDEN RESTAURANT (LOCATED WITHIN SKANSEN)—TIME TBD

THU. 12 JUNE

Session 12A

BOUNDARY LAYER FLOWS ALONG SLOPING SURFACES—I

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Evgeni Fedorovich, University of Oklahoma

9:00 AM

12A.1

Large Eddy Simulations of the Atmospheric Flow in Alpine Environments

Chad Higgins, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; and M. B. Parlange, M. Lehning, and C. Meneveau

9:15 AM

12A.2

Large-eddy simulation of density currents over complex terrain

Branko Kosovic, LLNL, Livermore, CA; and J. D. Mirocha

9:30 AM

12A.3

Large eddy simulation of katabatic flow

Simon Axelsen, University of Utrecht, Utrecht, Netherlands; and H. Van Dop

Presentation PDF (1.1 MB)

9:45 AM

12A.4

Numerical Studies of Thermally Induced Slope Winds

Xiurong Sun, CRESS, York University, Toronto, ON, Canada; and W. Weng and P. Taylor

Presentation PDF (150.5 kB)

Session 12B

BOUNDARY LAYERS AT HIGH LATITUDES—I

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Michael Tjernstrom, Stockholm University

9:00 AM

12B.1

Evaluation of GEM in the Stable Boundary Layer over the Arctic Ocean during SHEBA

Pierre-Luc Carpentier, University of Quebec, Montreal, QC, Canada; and C. G. Jones

Presentation PDF (1.2 MB)

9:15 AM

12B.2

Empirical turbulent Prandtl number parameterisation as a function of Richardson number

Philip S. Anderson, British Antarctic Survey, Cambridge, United Kingdom

9:30 AM

12B.3

Insights and puzzles in understanding atmospheric boundary layer—surface chemistry interactions over the Antarctic high plateau

William Neff, NOAA/ESRL & PSD, Boulder, CO; and D. Helmig and D. Davis

9:45 AM

12B.4

Drifting and blowing snow field studies in the Canadian North

Mark Gordon, Center for Research in Earth and Space Science, Toronto, ON, Canada; and P. A. Taylor, S. Savelyev, J. Hanesiak, Q. Huang, and S. Biswas

Presentation PDF (541.8 kB)

COFFEE BREAK

Session 13A

BOUNDARY LAYER FLOWS ALONG SLOPING SURFACES—II

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Evgeni Fedorovich, University of Oklahoma

10:30 AM

13A.1

Investigation of observed and modelled nocturnal wind and temperature oscillations in an Alpine valley

Irene Schicker, University of Natural Resources and Life Sciences, Vienna, Austria; and P. Seibert and E. Mursch-Radlgruber

Presentation PDF (2.5 MB)

10:45 AM

13A.2

Slope and basin flows in the Ebro basin: conditioned climatology and mesoscale modelling

Maria Antonia Jimenez, Institut Mediterrani d'Estudis Avançats (IMEDEA), UIB-CSIC, Esporles, Balearic Islands, Spain; and D. Martinez, F. Molinos, T. Clapes, J. Cunillera, and J. Cuxart

11:00 AM

13A.3

Further Examination of the Possible Role of Orographically Induced Wave Drag in the Stable Boundary Layer during CASES99

Gert-Jan Steeneveld, Wageningen University, Wageningen, Netherlands; and C. J. Nappo and A. A. M. Holtslag

Presentation PDF (330.4 kB)

11:15 AM

13A.4

Variability of Surface Air Temperature over Gently-Sloped Terrain

Petra M. Klein, Univ. of Oklahoma, Norman, OK; and D. Bodine, S. Arms, and A. Shapiro

13A.5

Diurnal evolution of temperature inversion structure in Arizona's Meteor Crater

11:45 AM

13A.6

The role of canopy-boundary layer interactions in scalar transport over forests

Andrew N. Ross, University of Leeds, Leeds, West Yorkshire, United Kingdom

12:00 PM

13A.7

A wind tunnel study of stably stratified flow on a ridge covered with a tall plant canopy

John J. Finnigan, CSIRO, Canberra, ACT, Australia; and D. Hughes

Presentation PDF (189.5 kB)

Session 13B

BOUNDARY LAYERS AT HIGH LATITUDES—II

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Peter A. Taylor, York University

10:30 AM

13B.1

The effect of leads in the sea-ice on the Antarctic boundary layer: a high-resolution study using a parallelized LES model

Björn Witha, Leibniz University, Hannover, Germany; and S. Raasch

10:45 AM

13B.2

Arctic boundar-layer inversions from SHEBA observations and ERA-40 reanalysis data

Michael Tjernström, University of Stockholm, Stockholm, Sweden; and R. G. Graversen

11:00 AM

13B.3

Cloud and inversion characteristics over the Arctic pack ice

J. Sedlar, Stockholm University, Stockholm, Sweden; and M. Tjernström

11:15 AM

13B.4

Downward sensible heat flux and decoupling over snow-covered surfaces

Timo Vihma, Finnish Meteorological Institute, Helsinki, Finland

11:30 AM

13B.5

Effect of surface heterogeneity on energy fluxes during the SHEBA winter

P. O. G. Persson, CIRES/Univ. of Colorado and NOAA/ESRL/PSD, Boulder, CO; and E. L. Andreas, C. W. Fairall, A. A. Grachev, P. S. Guest, and J. A. Maslanik

Presentation PDF (2.2 MB)

11:45 AM

13B.6

Effect of microphysical parameterization on the simulation of high-latitude surface energy budget and boundary-layer structure

P. O. G. Persson, CIRES/Univ. of Colorado and NOAA/ESRL/PSD, Boulder, CO; and A. B. Solomon, M. Shupe, H. Morrison, and J. W. Bao

12:00 PM

13B.7

Characteristics of near-surface atmospheric flow and turbulent heat fluxes under highly stable conditions over a snow-covered alpine glacier

Hendrik Huwald, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; and M. B. Parlange, C. Higgins, E. Bou-Zeid, M. Calaf-Bracons, and C. Meneveau

12:15 PM

13B.8

Surface-layer properties on the eastern Antarctic plateau and its adjacent slopes

Mingyu Zhou, Polar Research Institute of China, Pudong, Shanghai, China; and S. Zhong, Z. Zhang, D. H. Lenschow, H. M. Hsu, W. Q. Yao, Z. Gao, S. Li, and B. Sun

LUNCH BREAK

Session 14A

BOUNDARY LAYER FLOWS ALONG SLOPING SURFACES—III

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Petra M. Klein, Univ. of Oklahoma

1:30 PM

14A.1

The inclusion of SGS slopes of topography into the model equations in the framework of a second order turbulence closure

Matthias Raschendorfer, DWD, Offenbach, Germany

1:45 PM

14A.2

Basin temperature inversions and their relationship to ambient atmospheric conditions

Sharon Zhong, Michigan State University, East Lansing, MI; and W. Q. Yao, T. W. Horst, C. D. Whiteman, and S. P. Oncley

2:00 PM

14A.3

Coriolis effects in heterogeneous katabatic flows

Alan Shapiro, University of Oklahoma, Norman, OK; and E. Fedorovich

2:15 PM

14A.4

Scaling relationships for slope flows

Evgeni Fedorovich, University of Oklahoma, Norman, OK; and A. Shapiro

2:30 PM

14A.5

Two-dimensional katabatic flows along a planar slope

Bryan A. Burkholder, University of Oklahoma, Norman, OK; and A. Shapiro and E. Fedorovich

2:45 PM

14A.6

Case studies of katabatic wind in Coats Land, Antarctica

Hanneke Luijting, University of East Anglia, Norwich, United Kingdom; and I. A. Renfrew, P. S. Anderson, and J. C. King

Presentation PDF (247.2 kB)

Session 14B

BOUNDARY LAYER CLOUDS—I

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: David A. R. Kristovich, ISWS, Prairie Research Institute, University of Illinois

1:30 PM

14B.1

Dynamics of Diurnal Variation of Stratus Clouds in Central Coast of California

Shouping Wang, NRL, Monterey, CA; and Y. Jin, Q. Wang, and Q. Jiang

1:45 PM

14B.2

Relative humidity as a proxy for cloud formation over heterogeneous land surfaces

Chiel C. Van Heerwaarden, Wageningen University, Wageningen, Netherlands; and J. Vila

Presentation PDF (608.9 kB)

14B.3

Impact of entrainment and mixing on optical properties of boundary layer clouds

2:15 PM

14B.4

Mixing in shallow cumulus clouds studied by Lagrangian particle tracking

Thijs Heus, Delft University of Technology, Delft, Netherlands; and G. Van Dijk, H. J. J. Jonker, and H. E. A. Van den Akker

Presentation PDF (390.1 kB)

2:30 PM

14B.5

Dispersion in Cloudy Boundary Layers

Remco A. Verzijlbergh, Delft University of Technology, Delft, Netherlands; and H. J. J. Jonker and T. Heus

Presentation PDF (1.7 MB)

2:45 PM

14B.6

The spatial evolution of clouds and snow in a lake-effect boundary layer

Faye E. Barthold, University of Illinois, Urbana, IL; and D. A. R. Kristovich

Presentation PDF (193.1 kB)

COFFEE BREAK

Session 15A

BOUNDARY LAYER FLOWS ALONG SLOPING SURFACES—IV

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Petra M. Klein, Univ. of Oklahoma

3:30 PM

15A.1

Steering mechanisms of a persistent slope wind system on plot-scale vertical and horizontal transport of CO2 in and above an alpine forest

Christian Feigenwinter, Gembloux Agricultural University, Gembloux, Belgium; and C. Bernhofer, O. Kolle, A. Lindroth, L. Montagnani, and M. Aubinet

Presentation PDF (212.7 kB)

3:45 PM

15A.2

Case studies from a field campaign to measure canopy air flows over complex terrain

Rosey Grant, British Antarctic Survey, Cambridge, Cambs, United Kingdom; and A. N. Ross, I. M. Brooks, B. A. Gardiner, K. H. Jones, and S. D. Mobbs

Presentation PDF (1.2 MB)

4:00 PM

15A.3

A regional-scale downslope wind observed during the METCRAX Experiment in Northern Arizona

Lowell C. Savage III, Michigan State University, East Lansing, MI; and S. Zhong, W. Q. Yao, T. Horst, and W. O. Brown

4:15 PM

15A.4

Boundary Layer Effects on Atmospheric CO2 Concentrations at Mountaintop Locations

Stephan F.J. De Wekker, University of Virginia, Charlottesville, VA; and G. Song, A. Ameen, and B. B. Stephens

Session 15B

BOUNDARY LAYER CLOUDS—II

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Gunilla Svensson, Stockholm University

3:30 PM

15B.1

Measuring the boundary layer from space: The subtropical cloudy boundary layer transition

Joao Teixeira, JPL, Pasadena, CA

3:45 PM

15B.2

Role of Land Surface Processes and Boundary Layer Clouds on

Sethu Raman, North Carolina State University, Raleigh, NC

Presentation PDF (174.4 kB)

4:00 PM

15B.3

Role of nocturnal turbulence and advection in the formation of shallow cumulus over land

J. Vilà-Guerau de Arellano, Wageningen University, Wageningen, Netherlands

Presentation PDF (162.7 kB)

4:15 PM

15B.4

Land-atmosphere interactions and the multi-scale variability of fog in a complex physiographic environment

Robert Tardif, CNRM, Toulouse, France

FORMAL POSTER VIEWING

Poster Session 3

BOUNDARY LAYER CLOUDS

Location: Aula Magna

Host: 18th Symposium on Boundary Layers and Turbulence

P3.1

Analysis of the downward transport in RICO observations

Thijs Heus, Delft University of Technology, Delft, Netherlands; and F. C. J. F. Pols, H. J. J. Jonker, H. E. A. van den Akker, and D. H. Lenschow

Handout (297.7 kB)

P3.2

Single column simulations of COSMO for the GCSS RICO precipitating shallow cumulus case

Jürgen Helmert, DWD, Offenbach, Germany; and M. Raschendorfer and A. Seifert

Handout (325.5 kB)

P3.3

Using Doppler lidar and radar to evaluate the representation of drizzle in models

Ewan J. O'Connor, University of Reading, Reading, Berks., United Kingdom

Poster Session 4

BOUNDARY LAYERS AT HIGH LATITUDES

Location: Aula Magna

Host: 18th Symposium on Boundary Layers and Turbulence

P4.1

Long-term turbulent flux measurements over Arctic fjords in Svalbard

Tiina Kilpeläinen, Finnish Meteorological Institute, Helsinki, Finland; and A. Sjöblom

Handout (448.2 kB)

P4.2

The performance of the Met Office Unified Model over the central Arctic Ocean

Cathryn E. Birch, University of Leeds, Leeds, West Yorkshire, United Kingdom; and I. M. Brooks, M. Tjernström, and S. F. Milton

Handout (264.7 kB)

P4.3

The Impact of Distributing the Drag due to Unresolved Small-Scale Orography on Simulations with the Global Environmental Multiscale (GEM) Model

Daniel Deacu, EC, Dorval, QC, Canada; and J. Mailhot, S. Belair, J. Hanesiak, and A. Zadra

Poster Session 5

LAND-SURFACE-PBL COUPLING

Location: Aula Magna

Host: 18th Symposium on Boundary Layers and Turbulence

P5.1

Generation of free convection in a valley due to changes of the local circulation system

Rafael Eigenmann, University of Bayreuth, Bayreuth, Germany; and S. Metzger, L. Siebicke, K. Staudt, A. Serafimovich, and T. Foken

Handout (622.1 kB)

P5.2

Higher-order statistics of the turbulent flow in a sparse Lodgepole Pine canopy

Andreas Christen, University of British Columbia, Vancouver, BC, Canada; and M. Novak

P5.3

Interscale energy transfer in convective boundary layers forced by mesoscale surface heat flux heterogeneities

David P. Tyndall, Pennsylvania State University, University Park, PA; and K. J. Davis

P5.4

Impact of the planetary boundary layer processes on the turbulent length scales and heat fluxes at surface

F. Lohou, Observatoire Midi-Pyrénées, Campistrous, France; and F. Said, M. Lothon, D. Ramier, and B. Cappeleare

Handout (1.1 MB)

Poster Session 6

LARGE EDDY SIMULATIONS

Location: Aula Magna

Host: 18th Symposium on Boundary Layers and Turbulence

P6.1

Atmospheric stability and secular equilibrium of the 222-Rn decaying family

Jean-François Vinuesa, Joint Research Centre of the European Commission, Ispra, Italy; and S. Galmarini and S. Basu

P6.2

Momentum transport in the convective boundary layer: LES diagnostics

Pedro M. M. Soares, University of Lisbon, Lisbon, Portugal; and A. Catarino and P. M. A. Miranda

P6.3

Evaluation of dynamic subgrid-scale models in LES of stably stratified flow within and above an urban street canyon

Hao Lu, University of Minnesota, Minneapolis, MN; and F. Porté-Agel

P6.4

Simulations versus observations of a sheared convective boundary layer

Robert Conzemius, Windlogics, Inc., Grand Rapids, MN; and E. Fedorovich

Handout (407.1 kB)

Poster Session 7

MARINE BOUNDARY LAYERS

Location: Aula Magna

Host: 18th Symposium on Boundary Layers and Turbulence

P7.1

Characterization of the stability conditions and mixing length with distribution of the high frequency Richardson Number in the lower marine atmospheric boundary layer

P7.2

Differences between eddy correlation fluxes for discrete and continuous scalars: applications to sea-spray aerosol fluxes

Sarah J. Norris, University of Leeds, Leeds, West Yorkshire, United Kingdom; and I. M. Brooks, B. J. Brooks, and M. K. Hill

P7.3

Flux attenuation due to Sensor Displacement over Sea

Erik Nilsson, Uppsala University, Uppsala, Sweden; and A. Rutgersson and P. P. Sullivan

P7.4

Wind stress and stress curl from aircraft measurements and their connection to local coastal upwelling

Qing Wang, Naval Postgraduate School, Monterey, CA; and J. Kalogiros, S. R. Ramp, J. Paduan, G. Buzorius, and H. H. Jonsson

Handout (454.1 kB)

P7.5

Evidence of inertial oscillation in the stable marine Atmospheric Boundary Layer

Costas G. Helmis Sr., University of Athens, Athens, Attika, Greece; and Q. Wang, G. Sgouros, C. Halios, and S. Wang

P7.6

Modeling the Response of Multi-scale Winds in a Mountainous Coastal Region to SST Changes over the East Sea in Korea

Ju-Hee Jeong, Pusan National University, Busan, Korea, Republic of (South); and Y. K. Kim, I. B. Oh, D. Ko, and H. W. Lee

Handout (2.0 MB)

P7.7

Comparing air-sea fluxes of carbon dioxide estimated using the inertial dissipation method with fluxes measured using the eddy-correlation method

Maria Norman, Uppsala University, Uppsala, Sweden; and L. L. Sørensen, M. B. Christiansen, and A. Rutgersson

P7.8

Surface marine wind from the NCEP/NCAR and NCEP/DOE-II reanalyses

Joerg Winterfeldt, Institute for Coastal Research / GKSS Research Center and IMPRS-ESM / Max Planck Institute for Meteorology, Geesthacht, Germany; and R. Weiss

Handout (2.7 MB)

FRI. 13 JUNE

Session 16A

MARINE BOUNDARY LAYERS—I

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: David A. R. Kristovich, ISWS, Prairie Research Institute, University of Illinois

9:00 AM

16A.1

Modeling the boundary layer over Galveston Bay and the Gulf of Mexico for air pollution studies

Wayne M. Angevine, CIRES, University of Colorado, and NOAA/ESRL, Boulder, CO; and M. Zagar, S. C. Tucker, C. W. Fairall, L. Bariteau, D. E. Wolfe, and W. A. Brewer

Presentation PDF (524.3 kB)

9:15 AM

16A.2

Enhanced transfer velocity of carbon dioxide during unstable stratification

Anna Rutgersson, Uppsala Univ., Uppsala, Sweden; and A. S. Smedman and E. Sahlée

Presentation PDF (333.9 kB)

9:30 AM

16A.3

Vertical structure of the marine boundary layer and surface correlation among humidity temperature and C02 during the LASIE experiment in the Ligurian sea

Anna Maria Sempreviva, Italian National Council of Research, Rome, Italy; and E. Schiano, R. Bozzano, F. M. Grasso, M. Borghini, S. Pensieri, A. Semedo, L. L. Soerensen, C. Transerici, and J. Teixeira

9:45 AM

16A.4

Aircraft-based observations of air-sea fluxes during the Greenland Flow Distortion (GFD) experiment

Guðrún Nína Petersen, University of East Anglia, Norwich, Norfolk, United Kingdom; and I. A. Renfrew

Presentation PDF (323.5 kB)

Session 16B

STABLE BOUNDAY LAYERS—II

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Walter D. Bach Jr., Army Research Laboratory

9:00 AM

16B.1

Effect of the Earth's rotation on the equilibrium depth of a stably stratified barotropic planetary boundary layer

Dmitrii Mironov, German Weather Service, Offenbach am Main, Germany; and E. Fedorovich

9:15 AM

16B.2

Stable Boundary Layer Mixing in a Vertical Diffusion Scheme

Song-You Hong, Yonsei University, Seoul, Korea, Republic of (South); and S. W. Kim

Presentation PDF (2.5 MB)

9:30 AM

16B.3

Planetary Boundary Layer Feedback and Its Role in Climate Change

Igor Esau, Nansen Environmental and Remote Sensing Center / Bjerknes Centre for Climate Research, Bergen, Norway

Presentation PDF (229.2 kB)

9:45 AM

16B.4

Some evidence of vertical moisture transport during very stable conditions at the Cabauw measurement site

Stephan R. De Roode, Royal Netherlands Meteorological Institute, De Bilt, Netherlands; and F. C. Bosveld

COFFEE BREAK

Session 17A

MARINE BOUNDARY LAYERS—II

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Anna Rutgersson, Uppsala University

10:30 AM

17A.1

Subgrid-scale dynamics of water vapor, heat, and momentum over a lake

Nikki Vercauteren, Freie Universitaet Berlin, Berlin, Germany; and E. Bou-Zeid, M. B. Parlange, U. Lemmin, C. Meneveau, H. Huwald, and J. Selker

10:45 AM

17A.2

On the wave induced wind in the marine atmospheric boundary layer

Alvaro Semedo, Uppsala University, Uppsala, Sweden; and Ø. Sætra and A. Rutgersson

Presentation PDF (127.5 kB)

11:00 AM

17A.3

Statistical signature of the surface waves in the wind over the ocean

Tihomir Hristov, Johns Hopkins University, Baltimore, MD

Presentation PDF (162.5 kB)

11:15 AM

17A.4

Large Eddy Simulation of Roll Convection during a strong Cold Air Outbreak

Micha Gryschka, Leibniz University, Hannover, Germany; and D. Etling and S. Raasch

11:30 AM

17A.5

A radar characterization of the tradewind boundary layer

Jennifer L. Davison, University of Louisville, Louisville, KY

Presentation PDF (440.5 kB)

11:45 AM

17A.6

The marine boundary layer: impacts and modifications on a severe, deep convective system

Thomas E. Workoff, University of Illinois, Urbana, IL; and D. A. R. Kristovich

12:00 PM

17A.7

James M. Wilczak, NOAA, Boulder, CO; and J. B. Edson, J. Hojstrup, J. E. Hare, L. Mahrt, and R. Hill

Session 17B

STABLE BOUNDAY LAYERS—III

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Walter D. Bach Jr., Army Research Laboratory

10:30 AM

17B.1

Fundamental limitations of using sensible heat flux as a lower boundary condition in stable boundary layer simulation and modeling

Sukanta Basu, Texas Tech University, Lubbock, TX; and A. A. M. Holtslag, B. J. H. Van de Wiel, A. F. Moene, and G. J. Steeneveld

10:45 AM

17B.2A

Subgrid-scale physics under strongly stable atmospheric stratification: the SnoHATS experiment (Formerly 18A.2)

Elie Bou-Zeid, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; and C. Higgins, M. B. Parlange, H. Huwald, and C. Meneveau

11:00 AM

17B.3

Local similarity from Direct Numerical Simulations

Arnold F. Moene, Wageningen University, Wageningen, Netherlands; and B. J. H. Van de Wiel, H. J. J. Jonker, and W. H. De Ronde

11:15 AM

17B.4

Revisiting Nieuwstadt's collapsed boundary layer

Bas J.H. Van de Wiel, Wageningen University, Wageningen, Netherlands; and A. F. Moene, H. J. J. Jonker, W. H. De Ronde, and F. C. Bosveld

11:30 AM

17B.5

Relating nocturnal mesoscale fluxes to scalar vertical profiles

O. C. Acevedo, Universidade Federal de Santa Maria, Santa Maria, Brazil; and L. Mahrt, D. R. Fitzjarrald, O. Moraes, R. K. Sakai, M. Czikowski, and F. S. Puhales

11:45 AM

17B.6

Long Term Observations of Longwave Radiative Flux Divergence in the Stable Boundary Layer over Land

Gert-Jan Steeneveld, Wageningen University, Wageningen, Netherlands; and C. D. Groot Zwaaftink, M. Wokke, S. Pijlman, B. G. Heusinkveld, A. F. G. Jacobs, and A. A. M. Holtslag

Presentation PDF (273.0 kB)

12:00 PM

17B.7

A Numerical and Analytical Study of Intermittency in the Stable Boundary Layer

Wiet H. De Ronde, Delft University of Technology, Delft, Netherlands; and H. J. J. Jonker and B. J. H. Van de Wiel

Presentation PDF (314.1 kB)

LUNCH BREAK

Session 18A

CHATS FIELD PROGRAM

Location: Aula Magna Vänster (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Thomas W. Horst, NCAR

1:30 PM

18A.1

The Canopy Horizontal Array Turbulence Study (CHATS)

Edward G. Patton, NCAR, Boulder, CO; and T. Horst, D. Lenschow, P. Sullivan, S. Oncley, S. Burns, A. Guenther, A. Held, T. Karl, S. Mayor, L. Rizzo, S. Spuler, J. Sun, A. Turnipseed, E. Allwine, S. Edburg, B. Lamb, R. Avissar, H. Holder, R. Calhoun, J. Kleissl, W. J. Massman, and K. T. Paw U

Presentation PDF (1.9 MB)

1:45 PM

18A.2A

Turbulence transport processes and parameterization in nocturnal boundary layers (Formerly 17B.2)

Jielun Sun, NCAR, Boulder, CO

2:00 PM

18A.3

Turbulent pressure fluctuations measured during CHATS

Steven P. Oncley, NCAR, Boulder, CO; and W. J. Massman and E. G. Patton

Presentation PDF (206.6 kB)

2:15 PM

18A.4

Convection velocity and spatial turbulence statistics in the trunk space of a forest

Andreas Christen, University of British Columbia, Vancouver, BC, Canada; and D. Scherer, D. Schindler, and R. Vogt

18A.5

Volatile organic compound measurements during CHATS

2:45 PM

18A.6

Raman-shifted Eye-safe Aerosol Lidar (REAL) observations during the Canopy Horizontal Array Turbulence Study (CHATS)

Shane D. Mayor, California State University Chico, Chico, CA

Presentation PDF (2.8 MB)

3:00 PM

18A.7

Relaxed eddy accumulation simulations of aerosol number fluxes with various proxy scalars

Andreas Held, NCAR, Boulder, CO; and T. Karl, A. Turnipseed, E. Patton, J. Smith, and A. Guenther

Session 18B

STABLE BOUNDAY LAYERS—IV

Location: Aula Magna Höger (Aula Magna)

Host: 18th Symposium on Boundary Layers and Turbulence

Chair: Branko Kosovic, LLNL

1:30 PM

18B.1

Turbulence in the nocturnal boundary layer: highly-structured, strongly-variable, but ubiquitous

Ben B. Balsley, CIRES/Univ. of Colorado, Boulder, CO; and M. Tjernstrom and G. Svensson

Presentation PDF (562.2 kB)

1:45 PM

18B.2

Using the TLS system to improve understanding of atmospheric turbulent processes

Florence Bocquet, CIRES/Univ. of Colorado, Boulder, CO; and B. B. Balsley, M. Tjernstrom, and G. Svensson

Presentation PDF (253.1 kB)

2:00 PM

18B.3

Estimating the friction velocity in stable boundary layers

J. L. Argain, University of Algarve, Faro, Portugal; and P. M. A. Miranda and M. A. C. Teixeira

2:15 PM

18B.4

Plume behavior as controlled by the stable boundary layer

April L. Hiscox, University of South Carolina, Columbia, SC; and D. R. Miller and C. J. Nappo

2:30 PM

18B.5

Simulations of gravity wave-turbulence interactions in the stable boundary layer

Benjamin MacCall, Army Research Laboratory, White Sands Missile Range, NM; and P. A. Haines, W. Y. Sun, and W. R. Hsu

Presentation PDF (1.4 MB)

2:45 PM

18B.6

The effect of heterogeneous surface temperature and aerodynamic surface roughness on fluxes in the stable boundary layer

Rob Stoll, University of Utah, Salt Lake City, UT; and F. Porté-Agel

3:00 PM

18B.7

The effect of stratification on the aerodynamic roughness length and displacement height

Sergej Zilitinkevich, University of Helsinki, Helsinki, Finland; and I. Mammarella, A. Baklanov, and S. Joffre

CLOSING REMARKS AND STUDENT AWARDS

Location: Aula Magna Vänster

18th SYMPOSIUM ON BOUNDARY LAYERS AND TURBULENCE ADJORNS

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