Session 2C Upper Tropospheric and Stratospheric Processes (Chemical, Radiative and Dynamical) II

Monday, 13 January 2025: 10:45 AM-12:00 PM
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:
10:45 AM
2C.1
Stratospheric Evolution and Impact of the 2022 Hunga Tonga Eruption (Invited Presentation)
Yunqian Zhu, University of Colorado Boulder, Boulder, CO; CIRES, Univ. of Colorado Boulder/NOAA CSL, Boulder, CO

11:00 AM
2C.2
The January 2022 Hunga Eruption Cooled the Southern Hemisphere in 2022 and 2023
Ashok Kumar Gupta, UCLA, Los Angeles, CA; University of California, Los Angeles, Los Angeles, CA; and J. F. Kok, T. Mittal, K. Fauria, and R. Bennartz

11:15 AM
2C.3
Interactive and Microphysical Simulations of the Hunga Volcanic Aerosol: Exploring the “Resultant Size Distribution”, after Plume Dispersal to Large-Scale Volcanic Aerosol Enhancement, from Moderate-SO2 Large-Magnitude Explosive Eruption
Graham Mann, Univ. of Leeds, Leeds, YOR, United kingdom; and S. Dhomse, M. Yoshioka, S. Heddell, R. Hatcher, G. Lister, N. Bellouin, G. Taha, M. Kovilakam, T. Knepp, L. W. Thomason, B. T. Johnson, Y. Zhu, and M. Clyne

Handout (2.9 MB)

11:30 AM
2C.4
The impact of January 2022 Hunga Eruptions on Stratospheric Ozone in the NASA GEOS Chemistry Climate Model
Qing Liang, NASA Goddard Space Flight Center, Greenbelt, MD; and P. R. Colarco, L. Oman, S. Steenrod, M. E. Manyin, E. L. Fleming, S. Das, C. Mogno, and P. A. Case

11:45 AM
2C.5
Global Ground-based UT/LS Ozone Trends from the HEGIFTOM Project (2000-2022): Regional and Seasonal Variability
Anne M. Thompson, GSFC, Silver Spring, MD; and D. E. Kollonige, R. M. Stauffer, R. Van Malderen, H. G. J. Smit, K. L. Chang, I. Petropavlovskikh, PhD, A. Gaudel, C. Vigouroux, V. Thouret, E. Maillard-Barras, T. Leblanc, and D. Tarasick

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- Indicates paper has been withdrawn from meeting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