| Autor: |
Lorena Castro García, Martin de Graaf, Huanxin Zhang, Shobha Kondragunta, Xiaoguang Xu, Peter R. Colarco, John E. Yorks, Xi Chen, Meng Zhou, Jun Wang, Jeffrey S. Reid, Matthew J. McGill, Scott J. Janz |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Remote Sensing of Environment. 265:112674 |
| ISSN: |
0034-4257 |
| DOI: |
10.1016/j.rse.2021.112674 |
| Popis: |
Constraint of the vertical distribution of aerosol particles is crucial for the study of aerosol plume structure, aerosol radiative effects, and ultimately monitoring surface air pollution. We developed an algorithm to retrieve the aerosol optical central height (AOCH) of absorbing aerosols by using, for the first time, the oxygen (O2) A and B absorption band measurements from the TROPOspheric Monitoring Instrument (TROPOMI) over dark targets. For the retrieval, narrow band radiance at seven channels ranging from ultraviolet (UV) to shortwave infrared (SWIR) are convolved from TROPOMI hyperspectral measurements. Subsequently, cloudy pixels are screened out by using the slope of spectral reflectance, while aerosol types (dust and smoke) are classified by the wavelength dependence of aerosol path radiance in conjunction with UV aerosol index. Surface reflectance over land is derived from the MODIS surface bi-directional reflectance climatology, and over water from the GOME-2 surface Lambert-equivalent reflectivity (LER) database. The aerosol optical depth (AOD) and AOCH are retrieved through an approach of look-up-table accounting for AERONET-based dust and smoke optical properties. For multiple smoke and dust plume events around the world, our retrieved AOCH values agree with space-borne lidar CALIOP counterparts, with a mean bias of |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect