Join us for a virtual seminar by Dr. Lyatt Jaeglé, Dept. of Atmospheric and Climate Science (University of Washington). Her talk is titled "Blowing snow over Arctic sea ice: Integrating modeling, field measurements, and satellite observations."
Date and Time: Thursday, April 10, 2025 at 11:00am EST
Join us via Teams.
Abstract:
"Blowing snow sublimation over Arctic sea ice is an important but under-constrained source of wintertime sea salt aerosol (SSA) and reactive halogens, with implications for polar tropospheric chemistry, cloud microphysics, and radiative forcing. In addition to influencing atmospheric composition, blowing snow sublimation removes snow from the surface, reducing snow accumulation on sea ice and modifying the surface energy budget. I will summarize our past work using chemical transport modeling to quantify blowing snow sublimation and its role as a source of SSA. I will then highlight on-going work using observations from the ICESat-2 satellite to provide new constraints on the frequency, extent, and sublimation fluxes of blowing snow over Arctic sea ice. Comparisons with MOSAiC in situ observations and SnowModel-LG simulations demonstrate the capability of ICESat-2 to map the spatial and temporal variability of blowing snow sublimation. These findings help bridge observational gaps and refine our understanding of the Arctic snow and atmospheric moisture budgets in a rapidly changing environment."
Biography:
Lyatt Jaeglé is a professor in the Department of Atmospheric and Climate Science at the University of Washington. She received her PhD from Caltech in 1996 and was a postdoctoral fellow at Harvard University before joining the University of Washington in 2000. Her research spans a range of topics: surface air quality, long-range transport of pollution, mercury biogeochemical cycling, upper troposphere/lower stratosphere chemistry, natural and anthropogenic sources of aerosols. Her research group uses chemical transport models to analyze ground-based, ship, aircraft, and satellite observations. She has participated in multiple NASA, NSF, and NOAA aircraft campaigns, with leadership roles in the NOMADSS, WINTER, and the upcoming GOTHAAM campaigns. She is the PI for the STRIVE satellite mission concept currently being considered for NASA’s Earth System Explorers Program.
For more information on the GESTAR II Seminar Series, click here.
