DOI: 10.1002/2013JD019527
论文题名: Comparison of aerosol optical depth between CALIOP and MODIS-Aqua for CALIOP aerosol subtypes over the ocean
作者: Kim M.-H. ; Kim S.-W. ; Yoon S.-C. ; Omar A.H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 23 起始页码: 13241
结束页码: 13252
语种: 英语
英文关键词: aerosol optical depth
; aerosol type
; CALIOP
; lidar ratio
; MODIS
Scopus关键词: Algorithms
; Atmospheric aerosols
; Depolarization
; Dust
; Oceanography
; Optical radar
; Satellite imagery
; Aerosol optical depths
; Aerosol types
; CALIOP
; Lidar ratio
; MODIS
; Radiometers
; aerosol property
; algorithm
; Aqua (satellite)
; atmospheric pollution
; biomass burning
; CALIOP
; dust
; lidar
; marine atmosphere
; MODIS
; optical depth
; polarization
; wind velocity
英文摘要: The Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aerosol optical depth (AOD) has been compared with the Moderate Resolution Imaging Spectroradiometer (MODIS)-Aqua AOD using Level 2 products of both instruments. Such comparisons have been performed for five different aerosol subtypes classified by CALIOP algorithm, namely clean marine, dust, polluted dust, polluted continental, and biomass burning, over the ocean from June 2006 to December 2010. MODIS AOD at 550 nm (0.111 ± 0.079) for the collocated data pairs is about 63% higher than CALIOP AOD at 532 nm (0.068 ± 0.073). For clean marine, MODIS AOD (0.110 ± 0.064) is almost twice the CALIOP AOD (0.056 ± 0.038), and the difference between the AOD values has a strong latitude dependence likely related to the surface wind speed over the ocean. The difference in AOD for dust (13%) is observed to be the lowest among the five aerosol types under consideration, but it shows a slight regional variation. The discrepancy of AOD for dust also shows strong dependency on the layer mean of the particulate depolarization ratio. CALIOP AOD is higher than MODIS AOD for both polluted dust and polluted continental by 15% and 29%, respectively, for most of the ocean. One of the possible reasons for the difference is the misclassification of clean marine (or marine + dust) as polluted dust and polluted continental in the CALIOP algorithm. For biomass burning, uncertainty in the layer base altitude is thought to be one of the main reasons for the lower value of CALIOP AOD. Key Points The mean MODIS AOD is 63% larger than that of CALIOP AOD AOD difference for clean marine is strongly related to the surface wind speed AOD difference for dust has dependency on the particulate depolarization ratio ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63122
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: School of Earth and Environmental Sciences, Seoul National University, Seoul 151-742, South Korea; NASA Langley Research Center, Hampton VA, United States
Recommended Citation:
Kim M.-H.,Kim S.-W.,Yoon S.-C.,et al. Comparison of aerosol optical depth between CALIOP and MODIS-Aqua for CALIOP aerosol subtypes over the ocean[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(23)