Journal article
Potential of PACE Satellite Observations in the Oxygen Bands for Determining Aerosol Layer Height over Ocean
Journal of remote sensing, Vol.4, 0167
01/2024
DOI: 10.34133/remotesensing.0167
Abstract
Aerosol layer height (ALH) is an important but uncertain parameter for evaluating the impact of aerosols to weather and climate and for accurate atmospheric correction. This study aims to assess the potential for measuring ALH by the Ocean Color Instrument (OCI) on NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite. OCI measures Earth-reflected solar spectrum including reflectance in the oxygen (O2) A and B absorption bands that are invaluable for determining ALH. We assessed the sensitivity and information contained therein in retrieving ALH over ocean surface by using the radiative transfer simulation of OCI observations in the O2 bands. The capabilities were also demonstrated using hyperspectral data measured by the TROPOspheric Monitoring Instrument (TROPOMI), as spectrally convolved into the OCI bands. Our results indicate that (1) OCI observations in the O2 A band are sensitive to ALH, whereas those around O2 B band have relatively reduced sensitivity; (2) The most pronounced sensitivity to ALH is found in the 762.5 nm (and 690 nm) around the oxygen A (and B) bands, which are selected for ALH retrievals in this study; (3) the ALH retrieved from OCI proxy data is in a good agreement with the aerosol profile probed by CALIOP Lidar. Overall, the ALH retrievals for both smoke and dust events exhibit a root mean square error (RMSE) of 0.49 km and 0.31 km respectively for the smoke and dust cases, aligning with the uncertainties of ALH as measured from the concurrent TROPOMI and the Earth Polychromatic Imaging Camera (EPIC) instruments. Therefore, this study suggests from OCI observations we can generate ALH products with a well-characterized uncertainty. The technique and results presented in this study are suitable to develop a simple but robust ALH algorithm for OCI observations when the data become available.
Details
- Title: Subtitle
- Potential of PACE Satellite Observations in the Oxygen Bands for Determining Aerosol Layer Height over Ocean
- Creators
- Xiaoguang Xu - University of Maryland, Baltimore CountyXi Chen - University of Iowa, Iowa Technology InstituteJun Wang - University of IowaLorraine Remer - University of Maryland, Baltimore County
- Resource Type
- Journal article
- Publication Details
- Journal of remote sensing, Vol.4, 0167
- DOI
- 10.34133/remotesensing.0167
- ISSN
- 2694-1589
- eISSN
- 2694-1589
- Language
- English
- Electronic publication date
- 06/06/2024
- Date published
- 01/2024
- Academic Unit
- Iowa Technology Institute; Civil and Environmental Engineering; Physics and Astronomy; Electrical and Computer Engineering; Chemical and Biochemical Engineering
- Record Identifier
- 9984649044802771
Metrics
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