Articles | Volume 25, issue 19
https://doi.org/10.5194/acp-25-11935-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-11935-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Oct 2025
Research article |
| 02 Oct 2025
| 02 Oct 2025
Tracing ammonia emission sources in California's Salton Sea region: insights from airborne longwave-infrared hyperspectral imaging and ground monitoring
Sina Hasheminassab
CORRESPONDING AUTHOR
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91011, USA
David M. Tratt
The Aerospace Corporation, Los Angeles, CA 90009, USA
Olga V. Kalashnikova
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91011, USA
Clement S. Chang
The Aerospace Corporation, Los Angeles, CA 90009, USA
Morad Alvarez
The Aerospace Corporation, Los Angeles, CA 90009, USA
Kerry N. Buckland
The Aerospace Corporation, Los Angeles, CA 90009, USA
Michael J. Garay
The Aerospace Corporation, Los Angeles, CA 90009, USA
Francesca M. Hopkins
University of California, Riverside, CA 92521, USA
Eric R. Keim
The Aerospace Corporation, Los Angeles, CA 90009, USA
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91011, USA
Yaning Miao
University of California, Riverside, CA 92521, USA
Payam Pakbin
South Coast Air Quality Management District, Diamond Bar, CA 91765, USA
William C. Porter
University of California, Riverside, CA 92521, USA
Mohammad H. Sowlat
South Coast Air Quality Management District, Diamond Bar, CA 91765, USA
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Short summary
Ammonia (NH3) is a key air pollutant linked to fine particle pollution, yet its sources remain poorly understood. Using airborne infrared imaging and ground sensors, we mapped NH3 emissions in California’s Salton Sea region with unprecedented detail. We found high emissions from farms, geothermal plants, and waste sites, including sources missing from inventories. These findings highlight the need for better NH3 monitoring to improve air quality models and guide pollution reduction strategies.
Ammonia (NH3) is a key air pollutant linked to fine particle pollution, yet its sources remain...
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