A5028364122- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Climate variability and models
- Cryospheric studies and observations
- Ocean Acidification Effects and Responses
- Atmospheric aerosols and clouds
University of Washington
2022-2024
Florida State University
2019
Abstract We present a new method for simulating heterogeneous (surface and multiphase) cloud chemistry in atmospheric models that do not spatially resolve clouds. The accounts entrainment within the chemical rate expression, making it more accurate stable than other approaches. Using this “entrainment‐limited uptake,” we evaluate role of clouds tropospheric NO x cycle. Past literature suggests on large scales, losses N 2 O 5 3 are much less important aerosols. find, however, reactions...
Abstract We evaluate the effects of rapidly changing Arctic sea ice conditions on salt aerosols (SSA) produced by oceanic wave‐breaking and sublimation wind‐lofted salty blowing snow ice. use GEOS‐Chem chemical transport model to assess influence extent open ocean, multi‐year (MYI), first‐year (FYI), depths SSA emissions for 1980–2017. combine from Lagrangian snow‐evolution (SnowModel‐LG) together with an empirically‐derived salinity function depth derive spatially temporally varying surface...
Abstract Tropospheric reactive bromine (Br y ) influences the oxidation capacity of atmosphere by acting as a sink for ozone and nitrogen oxides. Aerosol acidity plays crucial role in Br abundances through acid‐catalyzed debromination from sea‐salt‐aerosol, largest global source. Bromine concentrations Russian Arctic ice‐core, Akademii Nauk, show 3.5‐fold increase pre‐industrial (PI) to 1970s (peak acidity, PA), decreased half 1999 (present day, PD). Ice‐core mirrors this trend, showing...
Abstract. Reactive halogens play a prominent role in the atmospheric chemistry of Arctic during springtime. Field measurements and modeling studies suggest that are emitted into atmosphere from snowpack reactions on wind-blown snow-sourced aerosols. The relative importance blowing snow sources is still debated, both at local scales regionally throughout Arctic. To understand implications these halogen pan-Arctic scale, we simulate reactive bromine chemical transport model GEOS-Chem. Two...
We evaluate the effects of rapidly changing Arctic sea ice conditions on salt aerosol (SSA) produced by oceanic wave-breaking and sublimation wind-lofted salty blowing snow ice. use GEOS-Chem chemical transport model to assess influence extent open ocean, multi-year ice, first-year (FYI), depths SSA emissions for 1980-2017. combine from Lagrangian snow-evolution (SnowModel-LG) together with an empirically-derived salinity function depth derive spatially temporally varying surface over FYI....
Abstract. Reactive halogens play a prominent role in the atmospheric chemistry of Arctic during springtime. Field measurements and models studies suggest that are emitted to atmosphere from snowpack reactions on wind-blown snow. The relative importance blowing snow sources is still debated, both at local scales regionally throughout Arctic. To understand implications these halogen pan-Arctic scale, we simulate reactive bromine chemical transport model GEOS-Chem. Two mechanisms included: 1)...