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Published March 16, 2023 | Published
Journal Article Open

Variations of Carbonyl Sulfide During the Dry/Wet Seasons Over the Amazon

Wang, Xinyue1
Jiang, Xun1 ORCID icon
Li, King‐Fai2 ORCID icon
Liang, Mao‐Chang3 ORCID icon
Kuai, Le4 ORCID icon
Tan, Lin2 ORCID icon
Yung, Yuk L.4, 5 ORCID icon
  • 1. ROR icon University of Houston
  • 2. ROR icon University of California, Riverside
  • 3. ROR icon Institute of Earth Sciences, Academia Sinica
  • 4. ROR icon Jet Propulsion Lab
  • 5. ROR icon California Institute of Technology

Abstract

Mid-tropospheric Carbonyl sulfide (OCS) retrievals from the Tropospheric Emission Spectrometer (TES) are utilized to study OCS distributions during the dry/wet seasons over the Amazon rainforest. TES OCS retrievals reveal positive OCS anomalies (∼16 ppt) over the central and southern parts of the Amazon during August–October (dry season) compared to January–March (wet season). There is less OCS taken up by vegetation and soil and more OCS released from biomass burning during the dry season, which causes an increase in OCS concentrations. Strong sinking air during the dry season also helps to trap OCS and this contributes to positive OCS anomalies. MOZART-4 model captures positive OCS anomalies over the central and southern regions of the Amazon and negative OCS anomalies over the northern part of the Amazon, which are similar to those from TES mid-tropospheric OCS retrievals. Our studies can help us better understand OCS variations and photosynthetic activities.

Copyright and License

© 2023 The Authors.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

Acknowledgement

The authors thank two anonymous referees and the editor for their time and constructive suggestions. X. Jiang was supported by NASA ROSES NNH19ZDA001N-CDAP Program.

Contributions

Conceptualization: Xinyue Wang, Xun Jiang. Data curation: Xinyue Wang, Lin Tan. Formal analysis: Xinyue Wang, Xun Jiang. Funding acquisition: Xun Jiang. Investigation: Xinyue Wang, Xun Jiang. Methodology: Xinyue Wang, Xun Jiang. Resources: Xinyue Wang. Software: Xinyue Wang. Supervision: Xun Jiang. Validation: Xinyue Wang. Visualization: Xinyue Wang.

Data Availability

TES mid-tropospheric OCS data are available at https://tes.jpl.nasa.gov/tes/data/. Horizontal winds, vertical pressure velocity, and surface soil temperature data can be accessed at https://psl.noaa.gov/data/gridded/data.ncep.reanalysis2.html. The precipitation data sets can be found at https://psl.noaa.gov/data/gridded/data.gpcp.html.

Supplemental Material

Supporting Information S1 (PDF)

Files

Geophysical Research Letters - 2023 - Wang - Variations of Carbonyl Sulfide During the Dry Wet Seasons Over the Amazon.pdf

Additional details

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March 11, 2025
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March 11, 2025