globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015JD024729
论文题名:
Extending "deep Blue" aerosol retrieval coverage to cases of absorbing aerosols above clouds: Sensitivity analysis and first case studies
作者: Sayer A.M.; Hsu N.C.; Bettenhausen C.; Lee J.; Redemann J.; Schmid B.; Shinozuka Y.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:9
起始页码: 4830
结束页码: 4854
语种: 英语
英文关键词: Aerosol ; Cloud ; MODIS ; Retrieval
Scopus关键词: absorbance ; aerosol ; aerosol property ; airborne sensing ; algorithm ; cloud cover ; MODIS ; optical depth ; sensitivity analysis
英文摘要: Cases of absorbing aerosols above clouds (AACs), such as smoke or mineral dust, are omitted from most routinely processed space-based aerosol optical depth (AOD) data products, including those from the Moderate Resolution Imaging Spectroradiometer (MODIS). This study presents a sensitivity analysis and preliminary algorithm to retrieve above-cloud AOD and liquid cloud optical depth (COD) for AAC cases from MODIS or similar sensors, for incorporation into a future version of the "Deep Blue" AOD data product. Detailed retrieval simulations suggest that these sensors should be able to determine AAC AOD with a typical level of uncertainty 25-50% (with lower uncertainties for more strongly absorbing aerosol types) and COD with an uncertainty 10-20%, if an appropriate aerosol optical model is known beforehand. Errors are larger, particularly if the aerosols are only weakly absorbing, if the aerosol optical properties are not known, and the appropriate model to use must also be retrieved. Actual retrieval errors are also compared to uncertainty envelopes obtained through the optimal estimation (OE) technique; OE-based uncertainties are found to be generally reasonable for COD but larger than actual retrieval errors for AOD, due in part to difficulties in quantifying the degree of spectral correlation of forward model error. The algorithm is also applied to two MODIS scenes (one smoke and one dust) for which near-coincident NASA Ames Airborne Tracking Sun photometer (AATS) data were available to use as a ground truth AOD data source, and found to be in good agreement, demonstrating the validity of the technique with real observations. © 2016. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62866
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: NASA Goddard Space Flight Center, Greenbelt, MD, United States; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Greenbelt, MD, United States; Science Systems and Applications Inc., Lanham, MD, United States; Earth Systems Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; NASA Ames Research Center, Moffett Field, CA, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Bay Area Environmental Research Institute, Petaluma, CA, United States

Recommended Citation:
Sayer A.M.,Hsu N.C.,Bettenhausen C.,et al. Extending "deep Blue" aerosol retrieval coverage to cases of absorbing aerosols above clouds: Sensitivity analysis and first case studies[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)
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