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Full-physics carbon dioxide retrievals from the Orbiting Carbon Observatory-2 (OCO-2) satellite by only using the 2.06 µm band
- Source :
- Atmospheric Measurement Techniques, Vol 12, Pp 6049-6058 (2019)
- Publication Year :
- 2019
- Publisher :
- Copernicus GmbH, 2019.
-
Abstract
- Passive remote sensing of atmospheric carbon dioxide uses spectroscopic measurements of sunlight backscattered by the Earth's surface and atmosphere. The current state-of-the-art retrieval methods use three different spectral bands, the oxygen A band at 0.76 µm and the weak and strong CO2 absorption bands at 1.61 and 2.06 µm, respectively, to infer information on light scattering and the carbon dioxide column-averaged dry-air mole fraction XCO2. In this study, we propose a one-band XCO2 retrieval technique which uses only the 2.06 µm band measurements from the Orbiting Carbon Observatory-2 (OCO-2) satellite. We examine the data quality by comparing the OCO-2 XCO2 with collocated ground-based measurements from the Total Carbon Column Observing Network (TCCON). Over land and ocean the OCO-2 one-band retrieval shows differences from TCCON observations with a standard deviation of ∼1.30 ppm and a station-to-station variability of ∼0.50 ppm. Moreover, we compare one-band and three-band retrievals over Europe, the Middle East, and Africa and see high correlation between the two retrievals with a SD of 0.93 ppm. Compared to the three-band retrievals, XCO2 retrievals using only the 2.06 µm band have similar retrieval accuracy, precision, and data yield.
- Subjects :
- Atmospheric Science
Carbon dioxide in Earth's atmosphere
010504 meteorology & atmospheric sciences
lcsh:TA715-787
lcsh:Earthwork. Foundations
chemistry.chemical_element
Spectral bands
010502 geochemistry & geophysics
01 natural sciences
Light scattering
lcsh:Environmental engineering
Atmosphere
chemistry.chemical_compound
chemistry
Carbon dioxide
Satellite
lcsh:TA170-171
Total Carbon Column Observing Network
Carbon
0105 earth and related environmental sciences
Remote sensing
Subjects
Details
- ISSN :
- 18678548
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Atmospheric Measurement Techniques
- Accession number :
- edsair.doi.dedup.....41472650d91619ebc876c58e25c3b734