A5085567166- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Ocean Acidification Effects and Responses
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Forest Management and Policy
- Spectroscopy and Laser Applications
- Forecasting Techniques and Applications
- Land Use and Ecosystem Services
- Ionosphere and magnetosphere dynamics
- Climate variability and models
- Remote Sensing in Agriculture
- Remote Sensing and Land Use
- Fire effects on ecosystems
- Rangeland and Wildlife Management
NSF National Center for Atmospheric Research
2021-2025
Washington State University
2017-2022
Abstract Carbonyl sulfide (OCS) is a non‐hygroscopic trace species in the free troposphere and large sulfur reservoir maintained by both direct oceanic, geologic, biogenic, anthropogenic emissions oxidation of other sulfur‐containing source species. It largest transported to stratosphere during volcanically quiescent periods. Data from 22 ground‐based globally dispersed stations are used derive trends total partial column OCS. Middle infrared spectral data recorded solar‐viewing Fourier...
Abstract. Stratospheric circulation is a critical part of the Arctic ozone cycle. Sudden stratospheric warming events (SSWs) manifest strongest alteration dynamics. During SSWs, changes in planetary wave propagation vigorously influence zonal mean wind, temperature, and tracer concentrations stratosphere over high latitudes. In this study, we examine six persistent major SSWs from 2004 to 2020 using Modern-Era Retrospective analysis for Research Applications, Version 2 (MERRA-2). Using...
Air pollution in Eastern and Southern Africa (E&SA) presents a severe public health concern, contributing to over 23,000 premature deaths annually exacerbating respiratory ailments for millions. Despite this, air quality forecasting remains challenging due sparse observational infrastructure. To address these challenges, we are developing an advanced framework using the Weather Research Forecasting model coupled with Chemistry (WRF-Chem) its associated data assimilation system...
The intensity of wildfires has increased dramatically in recent decades; thus, better understanding the impact land-management efforts biodiversity conservation on post-wildfire recovery could highlight value these interventions. Field assessments are often costly; therefore, monitoring effectiveness applied practices using remote sensing tools is critical. main goal this study to develop and apply a framework assess post-fire recovery. We focused area northern California southern Oregon,...
Abstract. Understanding variations in atmospheric ozone the Arctic is difficult because there are only a few long-term records of vertical profiles this region. We present 12 years from February 2005 to 2017 at four sites: Summit Station, Greenland; Ny-Ålesund, Svalbard, Norway; and Alert Eureka, Nunavut, Canada. These created by combining ozonesonde measurements with profile retrievals using data Microwave Limb Sounder (MLS). This combination creates high-quality dataset low uncertainty...
Abstract. Stratospheric circulation is a critical part of the Arctic ozone cycle. Sudden stratospheric warming events (SSWs) manifest strongest alteration dynamics. Changes in planetary wave propagation vigorously influence zonal mean wind, temperature, and tracer concentrations stratosphere over high latitudes. In this study, we examine six major SSWs from 2004 to 2020 using Modern-Era Retrospective analysis for Research Applications, Version 2 (MERRA-2). Using unique density observations...
Abstract. Understanding the drivers of atmospheric ozone variations in Arctic is difficult because there are few long-term records vertical profiles this region. We present 12 years over Summit Station, Greenland (72.6 N, 38.4 W; 3200 meters) that were measured from 2005 to 2016. These subjected data screening and extended 60 km using a robust extrapolation method. The total column partial four layers (troposphere upper stratosphere) analyzed. monthly mean reaches maximum about 400 DU April,...
When retrieving geophysical parameters, it is advantageous to have an estimate of prior information that based on observations with associated uncertainties, but this often not possible. Long-term ground-based remote sensing measurements and the ozonesonde program at Summit Station, Greenland provide opportunity create a unique framework retrieve atmospheric ozone using observationally-based in Arctic. This study investigates potential Polar Atmospheric Emitted Radiance Interferometer...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Atmospheres. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v1]Global Atmospheric OCS Trend Analysis from 22 NDACC StationsAuthorsJames WHanniganiDIvanOrtegaShimaBahramvash ShamsThomasBlumenstockiDJohn...