Measurement of CO <sub>2</sub> Column Concentration Above Cloud Tops With a Spaceborne IPDA Lidar
Abstract The Atmospheric Environment Monitoring Satellite (AEMS), launched by China in 2022, was equipped with active remote sensing lidar for carbon monitoring. It adopts the Integrated Path Differential Absorption (IPDA) technology to monitor global CO 2 column concentration (XCO 2 ). The calculation of cloud top XCO 2 requires cloud height data. A comparison between SRTM global elevation data and 1,572 nm channel elevation data reveals a coefficient of determination (R 2 ) of 0.998, with an average deviation of 1.24 m. The cloud top XCO 2 observations are consistent with the OCO‐2 and CarbonTracker trends. The ocean carbon uptake rate, assessed by the difference in CO 2 concentration between cloud top and sea surface, is −0.319 mmol/m 2 /h, which is in good agreement with the associated carbon flux data. This demonstrates the great potential of IPDA lidar for remote sensing of cloud top CO 2 and quantifying ocean carbon uptake.
Authors
- Xuhui Lee (ORCID: https://orcid.org/0000-0003-1350-4446)
- Zhihua Mao (ORCID: https://orcid.org/0000-0002-0066-1808)
- Dingyuan Liang
- Wei Xiao (ORCID: https://orcid.org/0000-0002-9199-2177)
- Jiqiao Liu (ORCID: https://orcid.org/0000-0001-8252-7073)
- Zhongting Wang (ORCID: https://orcid.org/0000-0003-0192-7919)
- Weibiao Chen (ORCID: https://orcid.org/0000-0001-7151-6926)
- Yang Zhang (ORCID: https://orcid.org/0000-0003-1015-3994)
- Sihan Liu (ORCID: https://orcid.org/0009-0005-2358-877X)
- Lingbing Bu (ORCID: https://orcid.org/0000-0002-9971-3486)
- Qin Wang (ORCID: https://orcid.org/0000-0003-1058-5201)
- Khalid Muhammad Burhan
Institutions
- Chinese Academy of Sciences (CN)
- Hong Kong University of Science and Technology (HK)
- Nanjing University of Information Science and Technology (CN)
- Ministry of Ecology and Environment (CN)
- China Aerospace Science and Technology Corporation (CN)
- Yale University (US)
- Shanghai Institute of Optics and Fine Mechanics (CN)
- Tianjin Meteorological Bureau (CN)
- University of Hong Kong (HK)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2024-11-29
- DOI
- https://doi.org/10.1029/2024gl113309
- Citations
- 4
- Primary Topic
- Atmospheric and Environmental Gas Dynamics
- Type
- article
- Field-Weighted Citation Impact
- 1.13
Funders
- National Aeronautics and Space Administration
- National Natural Science Foundation of China
- National Oceanic and Atmospheric Administration
- National Key Research and Development Program of China