干旱区生态环境知识资源中心(Arid): Global dust optical depth climatology derived from CALIOP and MODIS aerosol retrievals on decadal timescales: regional and interannual variability

Arid

DOI	10.5194/acp-21-13369-2021
	Global dust optical depth climatology derived from CALIOP and MODIS aerosol retrievals on decadal timescales: regional and interannual variability
	Song, Qianqian; Zhang, Zhibo; Yu, Hongbin; Ginoux, Paul; Shen, Jerry
通讯作者	Zhang, ZB (corresponding author), UMBC, Phys Dept, Baltimore, MD 21250 USA. ; Zhang, ZB (corresponding author), UMBC, Joint Ctr Earth Syst Technol, Baltimore, MD 21250 USA.
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
EISSN	1680-7324
出版年	2021
卷号	21 期号:17 页码:13369-13395
英文摘要	We derived two observation-based global monthly mean dust aerosol optical depth (DAOD) climatological datasets from 2007 to 2019 with a 2 degrees (latitude) x 5 degrees (longitude) spatial resolution, one based on Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and the other on Moderate Resolution Imaging Spectroradiometer (MODIS) observations. In addition, the CALIOP climatological dataset also includes dust vertical extinction profiles. Dust is distinguished from non-dust aerosols based on particle shape information (e.g., lidar depolarization ratio) for CALIOP and on dust size and absorption information (e.g., fine-mode fraction, Angstrom exponent, and single-scattering albedo) for MODIS, respectively. The two datasets compare reasonably well with the results reported in previous studies and the collocated Aerosol Robotic Network (AERONET) coarse-mode AOD. Based on these two datasets, we carried out a comprehensive comparative study of the spatial and temporal climatology of dust. On a multi-year average basis, the global (60 degrees S-60 degrees N) annual mean DAOD is 0.032 and 0.067 according to CALIOP and MODIS retrievals, respectively. In most dust-active regions, CALIOP DAOD generally correlates well (correlation coefficient R>0.6) with the MODIS DAOD, although the CALIOP value is significantly smaller. The CALIOP DAOD is 18 %, 34 %, 54 %, and 31 % smaller than MODIS DAOD over the Sahara, the tropical Atlantic Ocean, the Caribbean Sea, and the Arabian Sea, respectively. Applying a regional specific lidar ratio (LR) of 58 sr instead of the 44 sr used in the CALIOP operational retrieval reduces the difference from 18 % to 8 % over the Sahara and from 34 % to 12 % over the tropical Atlantic Ocean. However, over eastern Asia and the northwestern Pacific Ocean (NWP), the two datasets show weak correlation. Despite these discrepancies, CALIOP and MODIS show similar seasonal and interannual variations in regional DAOD. For dust aerosol over the NWP, both CALIOP and MODIS show a declining trend of DAOD at a rate of about 2 % yr(-1). This decreasing trend is consistent with the observed declining trend of DAOD in the southern Gobi Desert at a rate of 3 % yr(-1) and 5 % yr(-1) according to CALIOP and MODIS, respectively. The decreasing trend of DAOD in the southern Gobi Desert is in turn found to be significantly correlated with increasing vegetation and decreasing surface wind speed in the area.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000695647000003
WOS关键词	SPECTRAL-RESOLUTION LIDAR ; DESERT DUST ; ASIAN DUST ; SAHARAN DUST ; MINERAL DUST ; SATELLITE-OBSERVATIONS ; EAST-ASIA ; CALIPSO ; TRANSPORT ; PRODUCTS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362651
作者单位	[Song, Qianqian; Zhang, Zhibo] UMBC, Phys Dept, Baltimore, MD 21250 USA; [Song, Qianqian; Zhang, Zhibo] UMBC, Joint Ctr Earth Syst Technol, Baltimore, MD 21250 USA; [Yu, Hongbin; Shen, Jerry] NASA, Goddard Space Flight Ctr, Earth Sci Div, Greenbelt, MD USA; [Ginoux, Paul] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA; [Shen, Jerry] Univ Maryland, Coll Comp Math & Nat Sci, College Pk, MD 20742 USA
推荐引用方式 GB/T 7714	Song, Qianqian,Zhang, Zhibo,Yu, Hongbin,et al. Global dust optical depth climatology derived from CALIOP and MODIS aerosol retrievals on decadal timescales: regional and interannual variability[J],2021,21(17):13369-13395.
APA	Song, Qianqian,Zhang, Zhibo,Yu, Hongbin,Ginoux, Paul,&Shen, Jerry.(2021).Global dust optical depth climatology derived from CALIOP and MODIS aerosol retrievals on decadal timescales: regional and interannual variability.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(17),13369-13395.
MLA	Song, Qianqian,et al."Global dust optical depth climatology derived from CALIOP and MODIS aerosol retrievals on decadal timescales: regional and interannual variability".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.17(2021):13369-13395.