Session 5C Upper Tropospheric and Stratospheric Processes (Chemical, Radiative and Dynamical) V

Tuesday, 14 January 2025: 8:30 AM-10:00 AM
226 (New Orleans Ernest N. Morial Convention Center)
Host: 27th Conference on Atmospheric Chemistry
Cochairs:
Karen H. Rosenlof; Qing Liang, National Center for Atmospheric Research, Boulder, CO; Christopher Maloney and Thomas F. Hanisco, GSFC, Atmospheric Chemistry and Dynamics Laboratory, Greenbelt, MD

This session invites studies addressing upper tropospheric and stratospheric composition and interactions with chemistry, dynamics and climate. Of particular interest are studies examining stratospheric ozone changes associated with controls imposed by the Montreal Protocol, those examining upper troposphere/lower stratosphere composition using measurements from recent field campaigns, and studies on chemical and dynamical perturbations on the upper troposphere and stratosphere due to episodic events such as large pyro-cumulonimbus events and volcanic eruptions that reach the stratosphere as well as perturbations caused by the space launch industry. Reports on recent stratospheric aircraft campaigns addressing upper troposphere and stratosphere processes are welcome. Additional topics that would be applicable for this session are: 1) trends and variability in stratospheric composition; 2) the effects of increasing greenhouse gases on ozone recovery; 3) the relation between stratospheric composition and surface climate; 4) stratospheric aerosol-ozone-climate interactions associated with geo-engineering schemes. Observational and modeling studies ranging from local to global spatial scales and seasonal to centennial time scales are welcome.

Papers:
8:30 AM
5C.1
On the Presence of Ammonium Nitrate and Organic Aerosol in the Extratropical Lower Stratosphere Linked to the Asian Summer Monsoon (Invited Presentation)
Franziska Köllner, Johannes Gutenberg University Mainz, Mainz, Rheinland-Pfalz, Germany; and M. Kohl, F. Ekinci, O. Eppers, O. Appel, P. Brauner, S. Molleker, J. Schneider, A. Dragoneas, M. Höpfner, S. Johansson, J. Ungermann, D. Kunkel, F. Weyland, H. C. Lachnitt, L. Smoydzin-Tost, V. Lauther, M. Volk, M. Riese, S. Borrmann, and P. M. Hoor

8:45 AM
5C.2
Pyrocumulonimbus and its Role in the Climate System: What is known and unknown? (Invited Presentation)
David A. Peterson, NRL, Monterey, CA; and N. P. Lareau, O. V. Kalashnikova, M. T. Berman, M. D. Fromm, R. Servranckx, W. J. Julstrom, E. J. Hyer, J. R. Campbell, T. M. McHardy, G. P. Kablick III, and D. R. Allen

9:00 AM
5C.3
Stratospheric Impact of the Anomalous 2023 Canadian wildfires: Two Pathways of Smoke
Sergey Khaykin, LATMOS/IPSL, Guyancourt, France; and S. Bekki, M. Meziane, B. Josse, S. Pelletier, P. Goloub, Q. Hu, A. Laeng, D. A. Peterson, M. D. Fromm, and R. Servranckx

9:15 AM
5C.4
Impacts of Pyrocb Injection Amount and Height on Model-Simulated Aerosol Optical Properties and Radiative Forcing after the Australian New Year Super Outbreak
Gan Luo, State Univ. of New York at Albany, Albany, NY; and F. Yu, X. Chen, and J. Wang

9:30 AM
5C.5
On the Variability of the Stratospheric Aerosols
Pengfei Yu, Jinan University, Guangzhou, Guangdong, China; Jinan University, Guangzhou, Guangdong, China; and K. Qie and J. Bian

Recorded Presentation
- Indicates paper has been withdrawn from meeting
- Indicates an Award Winner
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