Session 1 Recent Field Investigations of TTL

Monday, 20 August 2007: 9:00 AM-12:30 PM
Multnomah (DoubleTree by Hilton Portland)
Host: 14th Conference on Middle Atmosphere
Organizers:
Andrew Gettelman, NCAR, Boulder, CO; Rolf Müller, Forschungszentrum Julich, Jülich and Karen H. Rosenlof, NOAA ESRL, Chemical Sciences Division, Boulder, CO
Chairs:
Karen H. Rosenlof, NOAA ESRL, Chemical Sciences Division, Boulder, CO and Rolf Müller, Forschungszentrum Julich, Jülich

Papers:
9:00 AM
Welcoming Remarks

9:05 AM
1.1
Recent measurements of high supersaturations and thin cirrus in the tropical tropopasue layer (Invited Speaker)
Eric Jensen, NASA, Moffett Field, CA
Recorded Presentation

9:25 AM
1.2
The high supersaturation puzzle (Invited Speaker)
Thomas Peter, ETH, Zürich, Switzerland
Recorded Presentation

9:45 AM
1.3
Water vapour at the tropical tropopause - and above
Cornelius Schiller, Forschungszentrum Julich, Jülich, Germany; and P. Konopka, G. Günther, R. Müller, F. Santos, N. Spelten, and M. Krämer
Recorded Presentation

10:00 AM
1.4
Dehydration processes in the tropical tropopause layer observed by SOWER campaigns in the western and central Pacific
Fumio Hasebe, Hokkaido Univ., Sapporo, Japan; and M. Shiotani, M. Fujiwara, H. Vömel, N. Nishi, S. Y. Ogino, Y. Inai, T. Shibata, S. Iwasaki, I. Matsui, A. Shimizu, N. Sugimoto, S. Saraspriya, N. Komala, and S. J. Oltmans
Recorded Presentation

10:15 AM
1.5
Evidence of lower stratosphere rehydration by convective overshooting of ice particles
Jean-Pierre Pommereau, Centre National de la Recherche Scientifique, Verrieres le Buisson, France; and S. Khaikin, J. Nielsen, T. Christensen, and N. Larsen
Recorded Presentation

10:30 AM
Break

11:00 AM
1.6
Microphysical properties of subvisible cirrus
R. Paul Lawson, SPEC Inc, Boulder, CO; and B. Pilson, B. Baker, Q. Mo, E. Jensen, and P. Bui
Recorded Presentation

11:15 AM
1.7
HIRDLS and CALIPSO observations of cirrus near the tropopause
Steve Massie, NCAR, Boulder, CO; and J. Gille, J. Barnett, and C. Craig
Recorded Presentation

11:30 AM
1.8
Comparison of in situ and satellite measurements of cirrus microphysical and radiative properties
Sean M. Davis, CIRES/Univ. of Colorado, Boulder, CO; and B. H. Kahn, Q. Yue, K. G. Meyer, Z. Zhang, K. S. Schmidt, and L. M. Avallone
Recorded Presentation

11:45 AM
1.9
Results from Aura MLS and the in situ hygrometers during the Costa Rica AVE campaign on the annual cycles of tropical UTLS H2O and CO
William G. Read, JPL, Pasadena, CA; and A. Lambert, H. Su, J. Jiang, D. L. Wu, and N. J. Livesey

12:00 PM
1.10
A climatology of rossby and gravity wave influences in the tropical upper troposphere and lower stratosphere based on SHADOZ (Southern Hemisphere Additional Ozonesondes) Soundings, 1998-2006
Amber L. Loucks, Penn State Univ., University Park, PA; and A. M. Thompson, S. Lee, S. K. Miller, D. M. Shelow, and J. C. Witte

12:15 PM
1.11
Towards a synthesis definition of the TTL
Philip W. Mote, Northwest Research Associates, Bellevue, WA; and S. Fueglistaler, A. E. Dessler, T. J. Dunkerton, I. A. Folkins, and Q. Fu

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