Mark W. Shephard

Environment and Climate Change Canada — Canada

Environmental Science · Physical Sciences

49h-index15.3kcitations248works1.72yr avg
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Research Topics

Atmospheric and Environmental Gas Dynamics(152), Atmospheric chemistry and aerosols(134), Atmospheric Ozone and Climate(100), Air Quality Monitoring and Forecasting(38), Air Quality and Health Impacts(18)

Publications248 total

Improved constraints on ammonia emissions and deposition from co-assimilating NH <sub>3</sub> and NO <sub>2</sub> satellite observations over the Netherlands
2026Open Access
Evaluation of HNO <sub>3</sub> , SO <sub>2</sub> , and NH <sub>3</sub> in the Surface Tiled Aerosol and Gaseous Exchange (STAGE) option in the Community Multiscale Air Quality Model version 5.3.2 against field-scale, in situ and satellite observations
2026Open Access
Supplementary material to "Evaluation of HNO <sub>3</sub> , SO <sub>2</sub> , and NH <sub>3</sub> in the Surface Tiled Aerosol and Gaseous Exchange (STAGE) option in the Community Multiscale Air Quality Model version 5.3.2 against field-scale, in situ and satellite observations"
2026
Impact of CrIS-Derived NH <sub>3</sub> Emission Updates on Simulated Nitrate and Ammonium Aerosols over East Asia
Environmental Science & Technology·2025Open Access
Development and validation of satellite-derived surface NO <sub>2</sub> estimates using machine learning versus traditional approaches in North America
Atmospheric measurement techniques·2025· 1 citedOpen Access
Decadal changes in atmospheric ammonia and dry deposition across China inferred from space-ground measurements and model simulations
Atmospheric chemistry and physics·2025Open Access
Supplementary material to "Geostationary observations of atmospheric ammonia over East Asia: spatio-temporal variations revealed by three years of FY-4B/GIIRS measurements"
2025Open Access
Geostationary observations of atmospheric ammonia over East Asia: spatio-temporal variations revealed by three years of FY-4B/GIIRS measurements
2025Open Access
Data fusion of modelled and measured deposition in the US and Canada, part II: Dry deposition of sulfur, nitrogen and ozone
Atmospheric Environment·2025
Supplementary material to "Ammonia Bidirectional Flux Model Tailored for Satellite Retrieval Parameter Inversions"
2025Open Access
Ammonia Bidirectional Flux Model Tailored for Satellite Retrieval Parameter Inversions
2025Open Access
Using multi-satellite observations to constrain ammonia emissions and unlock their potential over open water
Scientific Reports·2025· 2 citedOpen Access
Development and validation of satellite-derived surface NO <sub>2</sub> estimates using machine learning versus traditional approaches in North America
2025· 1 citedOpen Access
Critical load exceedances for North America and Europe using an ensemble of models and an investigation of causes of environmental impact estimate variability: an AQMEII4 study
Atmospheric chemistry and physics·2025· 5 citedOpen Access
Geographic and Temporal Variability of atmospheric surface Ammonia (NH3) in France, Belgium, and the Netherlands (2015 &amp;#8211; 2023) across different land-use types: Insights from Ground-Based and combined Satellite Observations.
2025Open Access
Ammonia emission estimates using CrIS satellite observations over Europe
2025Open Access
Supplementary material to "Ammonia emissions and depositions over the contiguous United States derived from IASI and CrIS using the directional derivative approach"
2025Open Access
Ammonia emissions and depositions over the contiguous United States derived from IASI and CrIS using the directional derivative approach
2025· 1 citedOpen Access
Infrared Satellite Detection Limits for Monitoring Atmospheric Ammonia
2025· 1 citedOpen Access
Infrared Satellite Detection Limits for Monitoring Atmospheric Ammonia
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing·2025· 1 citedOpen Access
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Frequent Co-authors

Karen Cady‐Pereira(27), S. A. Clough(18), S. S. Kulawik(12), A. Eldering(11), H. M. Worden(11), K. W. Bowman(10), G. B. Osterman(10), R. Beer(9), Daven K. Henze(9), John R. Worden(8), M. Lampel(8), C. P. Rinsland(8), M. Luo(8), E. J. Mlawer(7), C. A. McLinden(7), Jesse O. Bash(7), Liye Zhu(7), M. R. Gunson(6), Jennifer A. Logan(6), B. Fisher(6)