Program: 19th Conference on Middle Atmosphere (21st Conference on Atmospheric and Oceanic Fluid Dynamics and the 19th Conference on Middle Atmosphere )

Program Chairs: Margaret M. Hurwitz , Science Systems and Applications, Inc. ; Natalia Calvo , Universidad Complutense de Madrid

Reviewers: R. Alan Plumb , MIT ; Nicholas A. Davis , Colorado State University

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Sunday, 25 June 2017

5:00 PM-7:00 PM: Sunday, 25 June 2017

Registration

Location: Ballroom Foyer (Marriott Portland Downtown Waterfront)

Monday, 26 June 2017

7:30 AM-5:00 PM: Monday, 26 June 2017

Registration

Location: Ballroom Foyer (Marriott Portland Downtown Waterfront)

8:30 AM-10:00 AM: Monday, 26 June 2017

Session 1

The 2015–2016 QBO

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Margaret M. Hurwitz, Science Systems and Applications, Inc.

8:30 AM

Welcoming Remarks

8:45 AM

1.1

The Disruption of QBO Westerlies by Shallow Easterly Jets (Invited Presentation)

Peter Hitchcock, NCAR, Boulder, CO; and P. Haynes, W. J. Randel, and T. Birner

Recorded Presentation

9:15 AM

1.2

Response of Trace Gases to the Disrupted 2015–2016 Quasi-Biennial Oscillation

Olga V. Tweedy, Johns Hopkins University, Baltimore, MD; and N. Kramarova, S. E. Strahan, P. A. Newman, L. Coy, W. J. Randel, M. Park, D. W. Waugh, and S. M. Frith

Recorded Presentation

9:30 AM

1.3

Analyzing the Unprecedented QBO "Disruption" of Early 2016

Cory A Barton, NRL, Washington, DC; and J. P. McCormack

Recorded Presentation

9:45 AM

1.4

Wave Spectra during the Unexpected Qbo Disruption

Pu Lin, Princeton University, Princeton, NJ

Recorded Presentation

10:00 AM-10:30 AM: Monday, 26 June 2017

Coffee Break

Location: Ballroom Foyer (Marriott Portland Downtown Waterfront)

10:30 AM-12:00 PM: Monday, 26 June 2017

Session 2

The Quasi-Biennial Oscillation: Processes and Variability

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Margaret M. Hurwitz, Science Systems and Applications, Inc.

10:30 AM

2.1

Quasi-Biennial Oscillation Initiative

Jadwiga H. Richter, NCAR, Boulder, CO; and J. Anstey, N. Butchart, K. Hamilton, and S. M. Osprey

Recorded Presentation

11:00 AM

2.2

The Momentum Budget of the Quasi-Biennial Oscillation in the Whole Atmosphere Community Climate Model

Rolando R. Garcia, NCAR, Boulder, CO; and J. Richter

Recorded Presentation

11:15 AM

2.3

QBO/Solar Modulation of the Boreal Winter Madden-Julian Oscillation

Lon L. Hood, Univ. of Arizona, Tucson, AZ

Recorded Presentation

11:30 AM

2.4

Variability of Reactive Nitrogen Species and Ozone linked to the Stratospheric QBO

Mijeong Park, NCAR, Boulder, CO; and W. J. Randel, D. Kinnison, A. E. Bourassa, D. A. Degenstein, C. Roth, and C. McLinden

Recorded Presentation

11:45 AM

2.5

Early Winter Upward Planetary Wave Life Cycles As a Pathway for a Radiative Ozone-Wave Influence of the Midlatitude Qbo Signal

Vered Silverman, Tel Aviv University, Tel Aviv, Israel; and N. Harnik, K. Matthes, S. Lubis, and S. Wahl

Recorded Presentation

12:00 PM-1:30 PM: Monday, 26 June 2017

Lunch (On Your Own)

1:30 PM-3:00 PM: Monday, 26 June 2017

Session 3

Change in the Middle Atmosphere

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Rolando Garcia, NCAR

1:30 PM

3.1

What Can Observed Temperatures Tell Us about Stratospheric Dynamics over the past 40 Years?

Aaron L. Match, Princeton University, Princeton, NJ; and S. Fueglistaler

Recorded Presentation

1:45 PM

3.2

Do Stratospheric Ozone Measurements Show Large Tropical Width Changes?

Sean M. Davis, NOAA/ESRL, Boulder, CO; and B. Hassler and K. H. Rosenlof

2:00 PM

3.3

The Climate Impacts of Hydrofluorocarbons (HFCs): From the Earth's Surface to the Middle Atmosphere

Margaret M. Hurwitz, Science Systems and Applications, Inc., Greenbelt, MD; and E. L. Fleming, F. Li, P. A. Newman, and Q. Liang

Handout (1.4 MB)

2:15 PM

3.4

Stratospheric Transport Variability Diagnosed From Surface Measurements of Long-Lived Trace Gases

Eric A. Ray, CIRES/Univ. of Colorado, Boulder, CO; and J. S. Daniel, S. Montzka, R. W. Portmann, P. Yu, K. H. Rosenlof, and F. L. Moore

Recorded Presentation

2:30 PM

3.5

Stratospheric Response to the 11-year Solar Cycle: Breaking Planetary Waves, Internal Reflection and Resonance

Hua Lu, British Antarctic Survey, Cambridge, United Kingdom; and L. J. Gray, I. White, and T. Bracegirdle

Recorded Presentation

2:45 PM

3.6

Mitigation of Global Cooling By Stratospheric Chemistry Feedbacks in a Simulation of the Last Glacial Maximum

Satoshi Noda, Kyoto University, Kyoto City, Japan; and K. Kodera, Y. Adachi, M. Deushi, A. Kitoh, R. Mizuta, S. murakami, K. Yoshida, and S. Yoden

Recorded Presentation

3:00 PM-3:30 PM: Monday, 26 June 2017

Coffee Break

Location: Salon A-E (Marriott Portland Downtown Waterfront)

3:30 PM-4:30 PM: Monday, 26 June 2017

Session 4

Water Vapor & Convection

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Chaim I. Garfinkel, Hebrew University

3:30 PM

4.1

Large Anomalies in Lower Stratospheric Water Vapor and Ice During the 2015-2016 El Niño

Karen H. Rosenlof, NOAA ESRL, Boulder, CO; and M. A. Avery, S. M. Davis, H. Ye, and A. E. Dessler

Recorded Presentation

3:45 PM

4.2

Stratospheric Water Vapor Feedback and Its Modification by Interactive Ozone Chemistry

Feng Li, USRA, Greenbelt, MD; and P. A. Newman and M. M. Hurwitz

Recorded Presentation

4:00 PM

4.3

Temperature Control of the Variability of Tropical Tropopause Layer Cirrus Clouds

Hsiu-Hui Tseng, University of Washington, Seattle, WA; and Q. Fu

4:15 PM

4.4

Matthew H. Hitchman, University of Wisconsin, Madison, WI; and S. M. Rowe

Recorded Presentation

5:00 PM-7:00 PM: Monday, 26 June 2017

Formal Poster Viewing

Location: Salon A-E (Marriott Portland Downtown Waterfront)

Poster Session 1

Middle Atmosphere Poster Session

Location: Salon A-E (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Organizer: Natalia Calvo, Universidad Complutense de Madrid

Cochairs: Nicholas A. Davis, Colorado State University; Margaret M. Hurwitz, Science Systems and Applications, Inc.; R. Alan Plumb, MIT

Predictability of Stratospheric Sudden Warming Events in Grims Model

Kanghyun Song, Seoul National University, Seoul, Korea, Republic of (South); and C. Rhee, S. W. Son, and M. S. Koo

Different Ozone Variability related to the Madden-Julian Oscillation in the Upper Troposphere and Lower Stratosphere in El Niño and La Niña winters

Yuli Zhang, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

Nonlinear Response of Tropical Lower Stratospheric Temperature and Water Vapor to ENSO: Implications for the Millenium Drop

Chaim I. Garfinkel, Hebrew University, Jerusalem, Israel; and A. Gordon, L. Oman, F. Li, S. Pawson, and D. W. Waugh

Relative Role of the MJO and Stratospheric Variability in North Atlantic Climate Patterns During Boreal Winter

Chen Schwartz, Hebrew University of Jerusalem, Jerusalem, Israel

Predictability of Polar-night Jet Oscillation Events and Its Impact on the Skill of Tropospheric Forecasts

Shunsuke Noguchi, MRI, Tsukuba, Japan; and H. Mukougawa

How Well Do Reanalyses Capture the Lower Stratosphere Temperature Hiatus from 1994 to Present?

Craig S. Long, NOAA/NWS/NCEP, College Park, MD

Handout (1.1 MB)

Stratospheric Control of Madden Julian Oscillation and Its Impact on Subseasonal-to-Seasonal Prediction

Seok-Woo Son, Seoul National Univ., Seoul, Korea, Republic of (South); and Y. Lim, C. Yoo, A. G. Marshall, and H. H. Hendon

Modeling Seasonal Stratospheric Sudden Warming Climatology Based on Polar Vortex Statistics

Matt Horan, University of Utah, Salt Lake City, UT; and T. Reichler

Interannual Variability in Equatorial Kelvin Waves in the Upper Troposphere and Lower Stratosphere, and Relation to the Background Equatorial Wind

Junko Suzuki, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; and N. Nishi, M. Fujiwara, and K. Yoneyama

Using Elliptical and Zonal Mean Metrics to Examine Variability in Model Skill during the 7 January 2013 Sudden Stratospheric Warming Event

Jonathan L. Blufer, SUNY, Albany, NY; and A. L. Lang and L. F. Bosart

Impact of Planetary Wave Reflection on Polar Stratospheric Ozone

Sandro Lubis, University of Chicago, Chicago, IL; and V. Silverman, K. Matthes, N. Harnik, N. E. Omrani, and S. Wahl

Climate Forecast System Reanalysis Model-Level Data

Amy Hawes Butler, CIRES/Univ. of Colorado, Boulder, CO; and S. M. Davis, H. L. Miller, C. S. Long, and K. H. Rosenlof

Handout (2.0 MB)

Differences in Stratospheric Radiative-Dynamical Feedbacks in Middle versus Polar Latitudes

John R. Albers, University of Colorado, Boulder, CO; and J. Perlwitz, T. Birner, and E. J. Charlesworth

The Transient Response of the Southern Ocean to Stratospheric Ozone Depletion

William J. M. Seviour, Johns Hopkins University, Baltimore, MD; and A. Gnanadesikan, D. W. Waugh, and M. A. Pradal

Morphology of CALIPSO Laminar Cirrus and Its Role in the Cross-Tropopause Water Vapor Transport

Jie Gong, USRA, Greenbelt, MD; and D. L. Wu and V. Tsai

Recent Trends in Extreme Precipitation and Temperature over Southeastern South America: The Dominant Role of Stratospheric Ozone Depletion

Yutian Wu, Purdue University, West Lafayette, IN; and L. M. Polvani

Time Varying Changes in the Simulated Structure of the Brewer Dobson Circulation

Chaim I. Garfinkel, Hebrew University, Jerusalem, Israel; and V. Aquila, L. D. Oman, and D. W. Waugh

Weakening and Shift of the Arctic Stratospheric Polar Vortex: Internal Variability or Forced Response?

William J. M. Seviour, Johns Hopkins University, Baltimore, MD

Quasi-Biennial Oscillation in Warming Climate

Jadwiga H. Richter, NCAR, Boulder, CO; and N. Butchart, J. Anstey, A. C. Bushell, C. Cagnazzo, C. C. Chen, R. R. Garcia, K. Hamilton, Y. Kawatani, F. Lott, C. McLandress, H. Naoe, S. M. Osprey, J. F. Scinocca, F. Serva, and S. Watanabe

Comparing Stratospheric Influence on Tropospheric Ozone Across CCMI Models

Anne S. Glanville, NCAR, Boulder, CO; and D. E. Kinnison and J. Neu

Joint Poster Session 1

Troposphere-Stratosphere Dynamical Coupling Posters

Location: Salon A-E (Marriott Portland Downtown Waterfront)

Hosts: (Joint between the 21st Conference on Atmospheric and Oceanic Fluid Dynamics; and the 19th Conference on Middle Atmosphere )

Seasonal and ENSO Variations in Southern Hemisphere Westerly Jets

Nathaniel Loeb, University of Wisconsin, Madison, WI; and M. H. Hitchman

Tropical Moisture Export, Precipitation and the Role of Upper Level Circulation

Xiaoyu Long, RSMAS, Miami, FL

Tuesday, 27 June 2017

7:30 AM-5:00 PM: Tuesday, 27 June 2017

Registration

Location: Ballroom Foyer (Marriott Portland Downtown Waterfront)

8:15 AM-10:00 AM: Tuesday, 27 June 2017

Session 5

Reanalyses and their Applications

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Nicholas A. Davis, Colorado State University

8:15 AM

5.1

Brewer-Dobson Circulation Inter-Comparison Based on Reanalyses and Models (Invited Presentation)

Thomas Birner, Colorado State Univ., Fort Collins, CO

8:45 AM

5.2

Dynamics of the Stratospheric Aleutian Anticyclone

Stephen J. Colucci, Cornell University, Ithaca, NY; and T. S. Ehrmann

Recorded Presentation

9:00 AM

5.3

Evaluation of Lower Stratosphere Temperatures in Reanalyses in the Southern High Latitudes

Craig S. Long, NOAA/NWS/NCEP, College Park, MD

Recorded Presentation

Handout (1.4 MB)

9:15 AM

5.4

The Role of Calbuco Volcanic Aerosols on 2015 South Polar Ozone Depletion

Kane A. Stone, MIT, Cambridge, MA; and S. Solomon, D. Kinnison, M. C. Pitts, L. R. Poole, M. Mills, A. Schmidt, R. R. Neely III, D. J. Ivy, M. J. Schwartz, B. Johnson, M. B. Tully, A. R. Klekociuk, and G. König-Langlo

Recorded Presentation

9:30 AM

5.5

Airborne Observations of Non-orographic Gravity Waves over the Southern Ocean: Tropospheric or Stratospheric Wave Excitation?

Tanja Christina Portele, DLR, Wessling, Germany; and A. Dörnbrack, B. P. Williams, P. D. Pautet, and N. Žagar

9:45 AM

5.6

Modification and Application of the Navy Global Environmental Model (NAVGEM) to Generate High-Altitude (0-100 km) Global Atmospheric Reanalyses of the 2014 Austral Winter for the Deep Propagating Gravity Wave Experiment (DEEPWAVE)

Stephen D. Eckermann, NRL, Washington, DC; and J. Ma, D. D. Kuhl, K. W. Hoppel, J. P. McCormack, J. Doyle, B. Ruston, N. L. Baker, K. C. Viner, T. R. Whitcomb, and T. F. Hogan

Recorded Presentation

10:00 AM-10:30 AM: Tuesday, 27 June 2017

Coffee Break

Location: Salon A-E (Marriott Portland Downtown Waterfront)

10:30 AM-12:00 PM: Tuesday, 27 June 2017

Session 6

Observations

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Nicholas A. Davis, Colorado State University

10:30 AM

6.1

An Overview of OCTAV-UTLS (Observed Composition Trends and Variability in the UTLS), a SPARC Emerging Activity

Gloria L. Manney, NorthWest Research Associates & New Mexico Tech, Socorro, NM; and P. Hoor, I. Petropavlovskikh, A. E. Bourassa, G. Braathen, K. L. Chang, M. I. Hegglin, N. Kramarova, D. Kunkel, Z. D. Lawrence, T. Leblanc, N. J. Livesey, L. F. Millan, G. Stiller, S. Tegtmeier, V. Thouret, C. Voigt, and K. A. Walker

Recorded Presentation

11:00 AM

6.2

A Re-analysis for the Observed Responses of Mesospheric H2O to Solar Cycle Forcings

Ellis Remsberg, NASA/LaRC, Hampton, VA

Recorded Presentation

11:15 AM

6.3

Modulation of Stratospheric Kelvin Wave Activity from the Troposphere

George Kiladis, OAR, Boulder, CO; and K. B. Karnauskas and L. Zhang

Recorded Presentation

11:30 AM

6.4

Tropopause-Overshooting Convection from GridRad Radar Observations

John W. Cooney, Texas A&M Univ., College Station, TX; and K. P. Bowman and C. R. Homeyer

Recorded Presentation

11:45 AM

6.5

Wavelet Analysis of the effects of Gravity Waves on Water Vapor in the Tropical Tropopause Layer over Darwin, Australia

Andrew M. Dzambo, University of Wisconsin, Madison, WI; and M. H. Hitchman

Recorded Presentation

12:00 PM-1:30 PM: Tuesday, 27 June 2017

Lunch (On Your Own)

12:45 PM-1:30 PM: Tuesday, 27 June 2017

Town Hall Meeting 1

Town Hall Meeting: Simpler Models in CESM: Where We Are, and Where to Go from Here

Location: Salon F (Marriott Portland Downtown Waterfront)

Hosts: (Joint between the 21st Conference on Atmospheric and Oceanic Fluid Dynamics; and the 19th Conference on Middle Atmosphere )

Facilitators: Edwin P. Gerber, New York Univ.; Aditi Sheshadri, Columbia University; Isla R. Simpson, Univ. of Texas

1:30 PM-3:00 PM: Tuesday, 27 June 2017

Joint Session 1

Troposphere-Stratosphere Dynamical Coupling (Joint between the 21st Conference on Atmospheric and Oceanic Fluid Dynamics and the 19th Conference on Middle Atmosphere)

Location: Salon F (Marriott Portland Downtown Waterfront)

Hosts: (Joint between the 21st Conference on Atmospheric and Oceanic Fluid Dynamics; and the 19th Conference on Middle Atmosphere )

Cochairs: Laura Holt, NorthWest Research Associates; Edwin P. Gerber, New York Univ.

1:30 PM

J1.1

Stratospheric Influence on Moist Convection in a Minimal Model of QBO-like Oscillation in a Stratosphere-Troposphere Coupled System

Shigeo Yoden, Kyoto Univ., Kyoto, Japan; and H. H. Bui and E. Nishimoto

Recorded Presentation

1:45 PM

J1.2

Stratospheric Influences on the Seasonality of Tropical Cyclone Potential Intensity

Daniel Gilford, MIT, Cambridge, MA; and S. Solomon and K. A. Emanuel

Recorded Presentation

2:00 PM

J1.3

On the Linkage between Asian Summer Monsoon and Tropopause Folds

Yutian Wu, Purdue University, West Lafayette, IN; and G. Chen

Recorded Presentation

J1.4

Coupling between Ozone and the Circulation: A Negative Feedback on Southern Hemispheric Climate Change

2:15 PM

J1.4A

Periodic Behavior of Finite-Amplitude Wave Activity in the Southern Hemisphere Storm Track

Lei Wang, Univ. of Chicago, Chicago, IL; and N. Nakamura

Recorded Presentation

2:30 PM

J1.5

The Circulation Response to Volcanic Eruptions: The Importance of Tropical Stratospheric Warming

Kevin DallaSanta, Courant Institute of Mathematical Sciences, New York University, New York, NY; and E. P. Gerber

Recorded Presentation

2:45 PM

J1.6

Stratospheric Variability Contributed to and Sustained the Recent Hiatus in Eurasian Winter Warming

Chaim I. Garfinkel, Hebrew University, Jerusalem, Israel; and S. W. Son, K. Song, V. Aquila, and L. Oman

Recorded Presentation

3:00 PM-3:30 PM: Tuesday, 27 June 2017

Coffee Break

Location: Salon A-E (Marriott Portland Downtown Waterfront)

3:30 PM-5:00 PM: Tuesday, 27 June 2017

Joint Session 2

Transport and Mixing (Joint between the 21st Conference on Atmospheric and Oceanic Fluid Dynamics and the 19th Conference on Middle Atmosphere)

Location: Salon F (Marriott Portland Downtown Waterfront)

Hosts: (Joint between the 21st Conference on Atmospheric and Oceanic Fluid Dynamics; and the 19th Conference on Middle Atmosphere )

Cochairs: John R. Albers, University of Colorado; R. Alan Plumb, MIT

3:30 PM

J2.1

How Will Climate Change Impact Large-Scale Transport in the Upper Troposphere and Lower Stratosphere (UTLS)?

Marta Abalos, NCAR, Boulder, CO; and W. Randel, R. R. Garcia, and D. Kinnison

Recorded Presentation

J2.2

Transport and Stirring by the Asian Monsoon Anticyclone

3:45 PM

J2.2A

Atmospheric Barotropic Energy Transfer Response to Global Warming

Rei Chemke, Weizmann Institute of Science, Rehovot, Israel; and Y. Kaspi

Recorded Presentation

4:00 PM

J2.3

Transport from the Northern Hemisphere Midlatitude Surface: Comparisons Between the CCMI Models

Clara Orbe, NASA, Washington, DC; and D. W. Waugh and H. Yang

Recorded Presentation

4:15 PM

J2.4

A Theory for Stratospheric Transport from Age of Air

Marianna Linz, MIT, Cambridge, MA; and R. A. Plumb, E. P. Gerber, and A. Sheshadri

Recorded Presentation

4:30 PM

J2.5

Marginally Unstable Turbulence in Forced, Stratified Shear Flows

William D Smyth, College of Oceanic & Atmospheric Sciences, Oregon State University, Corvallis, OR; and H. Pham, J. N. Moum, and S. Sarkar

4:45 PM

J2.6

Linear Analysis of Moisture Transport Due to Baroclinic Waves

Alfredo N Wetzel, Univ. of Wisconsin, Madison, WI; and L. M. Smith and S. N. Stechmann

Recorded Presentation

5:00 PM-7:00 PM: Tuesday, 27 June 2017

Formal Poster Viewing

Location: Salon A-E (Marriott Portland Downtown Waterfront)

Joint Poster Session 2

Transport and Mixing Posters

Location: Salon A-E (Marriott Portland Downtown Waterfront)

Hosts: (Joint between the 21st Conference on Atmospheric and Oceanic Fluid Dynamics; and the 19th Conference on Middle Atmosphere )

Revisiting Eddy-Induced Oceanic Transport in a Qg Model.

Josephine Anne Park, Imperial College, London, United Kingdom

On the Relationship between Inertial Instability, Poleward Momentum Surges and Jet Intensifications near Midlatitude Cyclones

Shellie M. Rowe, University of Wisconsin, Madison, WI; and M. H. Hitchman

Synoptic Formation of Double Tropopauses

Chengji Liu, Colorado State University, Fort Collins, CO; and E. A. Barnes

Changes in Stratospheric Transport Induced by Sudden Stratospheric Warmings in Reanalysis and Model

Alvaro de la Camara, NCAR, Boulder, CO; and M. Abalos

Effects of Langmuir Turbulence on Upper Ocean Carbonate Chemistry

Katherine M. Smith, University of Colorado, Boulder, CO; and P. E. Hamlington, K. Niemeyer, B. Fox-Kemper, and N. S. Lovenduski

Wednesday, 28 June 2017

7:30 AM-5:00 PM: Wednesday, 28 June 2017

Registration

Location: Ballroom Foyer (Marriott Portland Downtown Waterfront)

8:00 AM-10:00 AM: Wednesday, 28 June 2017

Session 7

Modeling and Theory

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Thomas Birner, Colorado State Univ.

8:00 AM

7.1

The Dynamics of the Monsoon Anticyclone—a Single-Layer Model Study

Philip M. Rupp, University of Cambridge, Cambridge, United Kingdom; and P. H. Haynes

Recorded Presentation

Handout (2.0 MB)

8:15 AM

7.2

Understanding How Model Numerics Bias Tracer Transport: Insight from the Age of Air in Idealized Gcms

Aman Gupta, Courant Institue of Mathematical Sciences, New York, NY; and E. P. Gerber and O. Pauluis

Recorded Presentation

8:30 AM

7.3

The Interaction between Atmospheric Gravity Waves and Large-Scale Flows: An Efficient Description beyond the Non-Acceleration Paradigm

Ulrich Achatz, Goethe Universität, Frankfurt am Main, Germany; and G. Bölöni, B. Ribstein, J. Muraschko, C. Sgoff, and J. Wei

Recorded Presentation

8:45 AM

7.4

Role of Surface Forcing for Stratosphere-Troposphere Coupling in an Idealized Model

Zheng Wu, University of Utah, Salt Lake City, UT; and T. Reichler

Recorded Presentation

9:00 AM

7.5

An Analysis of Sudden Stratospheric Warmings and QBO-like oscillations in Idealized General Circulation Models

Christiane Jablonowski, Univ. of Michigan, Ann Arbor, MI; and W. Yao

Recorded Presentation

9:15 AM

7.6

Seasonal Winter Forecasts of the Northern Stratosphere and Troposphere: Results from JMA Seasonal Hindcast Experiments

Masakazu Taguchi, Aichi University of Education, Kariya, Japan

Recorded Presentation

9:30 AM

7.7

An Evaluation of Gravity Waves and Their Sources in the Southern Hemisphere in the 7-Km GEOS-5 Nature Run

Laura Holt, NorthWest Research Associates, Boulder, CO; and M. J. Alexander, L. Coy, C. Liu, A. Molod, W. M. Putman, and S. Pawson

Recorded Presentation

9:45 AM

7.8

The Role of the Stratospheric Pathway in Linking the Arctic Sea Ice Loss to the Midlatitude Circulation in CMIP5 Models

Bithi De, Purdue University, West Lafayette, IN; and Y. Wu

10:00 AM-10:30 AM: Wednesday, 28 June 2017

Coffee Break

Location: Salon A-E (Marriott Portland Downtown Waterfront)

10:30 AM-12:00 PM: Wednesday, 28 June 2017

Session 8

Transport and Circulation in the Middle Atmosphere

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Marta Abalos, NCAR

10:30 AM

8.1

The Strength of the Meridional Overturning Circulation of the Stratosphere

Marianna Linz, MIT, Cambridge, MA; and R. A. Plumb, E. P. Gerber, F. J. Haenel, G. Stiller, D. Kinnison, A. Ming, and J. L. Neu

Recorded Presentation

10:45 AM

8.2

Impacts of Jet Biases on Summertime Transport into the Arctic

Huang Yang, Johns Hopkins University, Baltimore, MD; and D. Waugh and C. Orbe

Recorded Presentation

11:00 AM

8.3

Contribution of Gravity-Wave Forcing to the Brewer-Dobson Circulation

Kaoru Sato, Univ. of Tokyo, Tokyo, Japan; and S. Hirano

11:15 AM

8.4

Investigations of STE and Transport Pathways near Midlatitude Cyclones using START-08 Aircraft Flight data and the UWNMS

Elliot C. Shiben, Univ. Wisconsin, Madison, WI; and M. L. Büker, M. H. Hitchman, and S. M. Rowe

11:30 AM

8.5

Transport-Radiation Feedbacks of Ozone in the Tropical Tropopause Layer

Edward Joseph Charlesworth, Colorado State University and Froschungszentrum Juelich, Koln, Germany; and T. Birner and J. R. Albers

Recorded Presentation

11:45 AM

8.6

Relative Importance of Mechanisms Governing Interannual Stratosphere to Troposphere Ozone Transport

John R. Albers, University of Colorado, Boulder, CO; and J. Perlwitz, G. N. Kiladis, Z. D. Lawrence, A. H. Butler, T. Birner, G. L. Manney, A. O. Langford, and J. Dias

Recorded Presentation

12:00 PM-1:30 PM: Wednesday, 28 June 2017

Lunch (On Your Own)

Women Scientist's Lunch

Location: Columbia (Marriott Portland Downtown Waterfront)

1:30 PM-3:00 PM: Wednesday, 28 June 2017

Session 9

The Polar Vortices & Planetary Waves: Upward Coupling

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Carlos R. Mechoso, Univ. of California

1:30 PM

9.1

Why are Upward EP-Flux and Temperature Positively Skewed in the Stratosphere?

Oliver Watt-Meyer, University of Washington, Seattle, WA; and P. J. Kushner

Recorded Presentation

1:45 PM

9.2

Comparing Extreme Heat Flux Events for Wavenumber 1 and 2

Andreas Miller, MIT, Cambridge, MA; and R. A. Plumb

Recorded Presentation

2:00 PM

9.3

Tropospheric Cooling as a Mechanism for Stratospheric Polar Vortex Disturbances

Thomas S. Ehrmann, Cornell University, Ithaca, NY; and S. J. Colucci

Recorded Presentation

2:15 PM

9.4

Characterizing Stratospheric Polar Vortex Variability with Computer Vision Techniques

Zachary D. Lawrence, New Mexico Institute of Mining and Technology, Socorro, NM; and G. L. Manney

Recorded Presentation

2:30 PM

9.5

Zonal Phase Speed, Wave Propagation into the Stratosphere, and Atmospheric Blocking

Daniela I.V. Domeisen, GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany; and O. Martius and B. Jiménez Esteve

Recorded Presentation

2:45 PM

9.6

Three Types of Synoptic Events and Their Associated Troposphere-Stratosphere Coupling

Hannah E. Attard, University at Albany/SUNY, Albany, NY; and A. L. Lang

Recorded Presentation

3:30 PM-4:30 PM: Wednesday, 28 June 2017

Session 10

The Polar Vortices & Planetary Waves: Theory

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: R. Alan Plumb, MIT

3:30 PM

10.1

Filamentation and Breakdown of the Southern Polar Vortex

Carlos R. Mechoso, Univ. of California, Los Angeles, CA; and V. J. Garcia, J. Curbelo, A. M. Mancho, and S. Wiggins

Recorded Presentation

3:45 PM

10.2

The Final Warming of the Southern Stratosphere from a Lagrangian Perspective

Jezabel Curbelo, Universidad Autónoma de Madrid, Madrid, Spain; and C. R. Mechoso, V. J. Garcia, A. M. Mancho, S. Wiggins, and C. Niang

4:00 PM

10.3

Formation of 2d and 3d Circulation Responding to Unsteady Wave Forcing in the Middle Atmosphere

Yuki Hayashi, University of Tokyo, Tokyo, Japan; and K. Sato

4:15 PM

10.4

Prolonged Effect of the Stratospheric Pathway in Linking Barents-Kara Sea Sea Ice Variability to the Midlatitude Circulation in a Simplified Model

Pengfei Zhang, Purdue University, West Lafayette, IN; and Y. Wu and K. L. Smith

Recorded Presentation

5:00 PM-6:00 PM: Wednesday, 28 June 2017

Conference Reception

Location: Ballroom Foyer (Marriott Portland Downtown Waterfront)

Thursday, 29 June 2017

7:30 AM-5:00 PM: Thursday, 29 June 2017

Registration

Location: Ballroom Foyer (Marriott Portland Downtown Waterfront)

8:15 AM-10:00 AM: Thursday, 29 June 2017

Session 11

The Polar Vortices & Planetary Waves: Downward Coupling

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Cochairs: Amy Hawes Butler, CIRES/Univ. of Colorado; Edwin P. Gerber, Courant Institute of Mathematical Sciences

8:15 AM

11.1

Arctic Amplification of Stratospheric Variability (Invited Presentation)

Mark P Baldwin, University of Exeter, Exeter, United Kingdom; and T. Birner and B. Ayarzagüena

Recorded Presentation

8:45 AM

11.2

On the Control of the Stratosphere-Troposphere Dynamical Coupling by Finite-amplitude Rossby Waves

Sandro Lubis, University of Chicago, Chicago, IL; and C. S. Y. Huang and N. Nakamura

9:00 AM

11.3

Dynamics of Extreme Negative Planetary Wave Heat Flux Events in an Idealized Model

Etienne Dunn-Sigouin, LDEO/Columbia University, New York, NY; and T. A. Shaw

Recorded Presentation

9:15 AM

11.4

Separating the Tropospheric and Stratospheric Pathways of ENSO

Bernat Jiménez Esteve, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; and D. I. V. Domeisen

Recorded Presentation

9:30 AM

11.5

The Complex Behavior of El NiÃ±o Winter 2015-2016

Natalia Calvo, Universidad Complutense de Madrid, Madrid, Spain; and F. M. Palmeiro, M. Iza, D. Barriopedro, and R. Garcia-Herrera

11.6

Exploring the Relationship Between SST Anomalies in the Northeast Pacific and North Atlantic and the Shape of the Polar Vortex

9:45 AM

11.7

The 2016-2017 Early Season Weak Stratospheric Vortex Event: Precursors and Predictability

Andrea L. Lang, University at Albany, SUNY, Albany, NY; and H. E. Attard and J. L. Blufer

Recorded Presentation

10:00 AM-10:30 AM: Thursday, 29 June 2017

Coffee Break

Location: Salon A-E (Marriott Portland Downtown Waterfront)

10:30 AM-12:00 PM: Thursday, 29 June 2017

Session 12

Sudden Stratospheric Warmings: Drivers and Characteristics

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Daniela I.V. Domeisen, GEOMAR Helmholtz Centre for Ocean Research

10:30 AM

12.1

Orography and SSWs: Which Mountains Matter Most?

Rachel H. White, University of Washington, Seattle, WA; and A. Sheshadri and D. S. Battisti

Recorded Presentation

10:45 AM

12.2

Teleconnection between Madden Julian Oscillation and Sudden Stratospheric Warmings

Wanying Kang, Harvard University, Cambridge, MA; and E. Tziperman

Recorded Presentation

11:00 AM

12.3

Systematic Assessment of Sudden Stratospheric Warming Thresholds

Amy Hawes Butler, CIRES/Univ. of Colorado, Boulder, CO; and E. P. Gerber

Recorded Presentation

11:15 AM

12.4

Defining Sudden Stratospheric Warmings in Climate Models: Accounting for Biases in Model Climatologies

Seok-Woo Son, Seoul National Univ., Seoul, Korea, Republic of (South); and J. Kim, E. P. Gerber, and H. S. Park

11:30 AM

12.5

Does Stratospheric Sudden Warming Occur More Frequently during ENSO Winters Than during ENSO-Neutral Winters?

Kanghyun Song, Seoul National University, Seoul, Korea, Republic of (South); and S. W. Son

Recorded Presentation

11:45 AM

12.6

Understanding the Frequency of SSW Events During La Nina in a Large Ensemble of Integrations from a Chemistry-Climate Model

Israel Weinbegrer, The Hebrew University of Jerusalem, Bet-El, Israel

Recorded Presentation

12:00 PM-1:30 PM: Thursday, 29 June 2017

Lunch (On Your Own)

1:30 PM-2:45 PM: Thursday, 29 June 2017

Session 13

Sudden Stratospheric Warmings: Impacts and Coupling

Location: Salon G-I (Marriott Portland Downtown Waterfront)

Host: 19th Conference on Middle Atmosphere

Chair: Seok-Woo Son, Seoul National Univ.

1:30 PM

13.1

Lower Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events

Patrick Martineau, UCLA, Los Angeles, CA; and G. Chen and S. W. Son

Recorded Presentation

1:45 PM

13.2

Dynamical Coupling Between the Middle Atmosphere and Arctic Sea Ice

Thomas Reichler, University of Utah, Salt Lake City, UT

Recorded Presentation

2:00 PM

13.3

The Relevance of the Stratosphere State Prior to Sudden Stratospheric Warmings in WACCM (Invited Presentation)

Alvaro de la Camara, NCAR, Boulder, CO; and J. R. Albers, T. Birner, R. R. Garcia, P. Hitchcock, D. Kinnison, and A. K. Smith

Recorded Presentation

2:30 PM

13.4

The Downward Influence of Stratospheric Sudden Warmings

Ian White, Hebrew University of Jerusalem, Jerusalem, Israel; and C. I. Garfinkel, E. P. Gerber, and M. Jucker

Recorded Presentation

2:45 PM-3:00 PM: Thursday, 29 June 2017

19Middle Conference Adjourns

Location: Salon G-I (Marriott Portland Downtown Waterfront)

3:00 PM-3:30 PM: Thursday, 29 June 2017

Coffee Break

Location: Salon A-E (Marriott Portland Downtown Waterfront)

5:00 PM-7:00 PM: Thursday, 29 June 2017

Formal Poster Viewing

Location: Salon A-E (Marriott Portland Downtown Waterfront)

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