Session 4 Tropical Upper Troposphere Water Vapor, Clouds and Stratospheric Dehydration -Part I

Tuesday, 24 January 2017: 8:30 AM-10:00 AM
401 (Washington State Convention Center )
Host: 19th Conference on Atmospheric Chemistry
Mark R. Schoeberl, Science and Technology Corporation, Columbia, MD and Eric Jensen, NASA, Ames Research Center, Moffett Field, CA

Recent observations from aircraft, balloons, and satellites, along with advances in modeling techniques and improved meteorological analyses, are providing new insights into the physical processes controlling clouds and water vapor concentration in the tropical tropopause and lowermost stratosphere. In particular, this session will focus on model and observational investigations addressing the impacts of rapid transport by deep convection, slow diabatic vertical motions, wave-driven temperature oscillations, and cloud microphysics using analyses from recent aircraft and balloon in situ measurements and long-term satellite measurements.

8:45 AM
Impact of Convection and Dynamics on Greenhouse Gas Distribution in the TTL
Jasna V. Pittman, Harvard Univ., Cambridge, MA; and S. C. Wofsy, B. C. Daube, R. S. Gao, E. J. Hintsa, F. L. Moore, J. W. Elkins, E. Dlugokencky, T. V. Bui, L. Pfister, E. Jensen, and L. L. Pan

9:00 AM
CALIOP Version 4 Observations of Global Cirrus Cloud Visible Extinction and Ice Mass Distribution in the Tropical TTL
Melody A. Avery, NASA, Hampton, VA; and M. Vaughan, P. Lawson, E. Jensen, S. Woods, T. Thornberry, M. R. Schoeberl, and A. W. Rollins
9:15 AM
Microphysical Properties of TTL Cirrus
Sarah Woods, Stratton Park Engineering Company, Boulder, CO; and P. Lawson, E. Jensen, T. P. Bui, T. Thornberry, and A. W. Rollins
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