气候变化领域集成服务门户(CCPortal): In situ and satellite-based estimates of cloud properties and aerosol-cloud interactions over the southeast Atlantic Ocean

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DOI	10.5194/acp-22-12923-2022
	In situ and satellite-based estimates of cloud properties and aerosol-cloud interactions over the southeast Atlantic Ocean
	Gupta, Siddhant; McFarquhar, Greg M.; O'Brien, Joseph R.; Poellot, Michael R.; Delene, David J.; Chang, Ian; Gao, Lan; Xu, Feng; Redemann, Jens
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	12923
结束页码	12943
卷号	22 期号:19 页码:21
英文摘要	In situ cloud probe data from the NASA ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) field campaign were used to estimate the effective radius (R-e), cloud optical thickness (tau), and cloud droplet concentration (N-c) for marine stratocumulus over the southeast Atlantic Ocean. The in situ R-e, tau, and N-c were compared with co-located Moderate Resolution Imaging Spectroradiometer (MODIS) retrievals of R-e and tau and MODIS-derived N-c. For 145 cloud profiles, a MODIS retrieval was co-located with in situ data with a time gap of less than 1 h. On average, the MODIS R-e and tau (11.3 mu m and 11.7) were 1.6 mu m and 2.3 higher than the in situ R-e and tau with Pearson's correlation coefficients (R) of 0.77 and 0.73, respectively. The average MODIS N-c (151.5 cm(-3)) was within 1 cm(-3) of the average in situ N-c with an R of 0.90. The 145 cloud profiles were classified into 67 contact profiles where an aerosol concentration (N-a) greater than 500 cm(-3) was sampled within 100 m above cloud tops and 78 separated profiles where N-a less than 500 cm(-3) was sampled up to 100 m above cloud tops. Contact profiles had a higher in situ N-c (by 88 cm(-3)), higher tau (by 2.5), and lower in situ R-e (by 2.2 mu m) compared to separated profiles. These differences were associated with aerosol-cloud interactions (ACI), and MODIS estimates of the differences were within 5 cm(-3), 0.5, and 0.2 mu m of the in situ estimates when profiles with MODIS R-e>15 mu m or MODIS tau>25 were removed. The agreement between MODIS and in situ estimates of changes in R-e, tau, and N-c associated with ACI was driven by small biases in MODIS retrievals of cloud properties relative to in situ measurements across different aerosol regimes. Thus, when combined with estimates of aerosol location and concentration, MODIS retrievals of marine stratocumulus cloud properties over the southeast Atlantic can be used to study ACI over larger domains and longer timescales than possible using in situ data.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000864748300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273918
作者单位	University of Oklahoma System; University of Oklahoma - Norman; University of Oklahoma System; University of Oklahoma - Norman; University of North Dakota Grand Forks; United States Department of Energy (DOE); Brookhaven National Laboratory; United States Department of Energy (DOE); Argonne National Laboratory
推荐引用方式 GB/T 7714	Gupta, Siddhant,McFarquhar, Greg M.,O'Brien, Joseph R.,et al. In situ and satellite-based estimates of cloud properties and aerosol-cloud interactions over the southeast Atlantic Ocean[J],2022,22(19):21.
APA	Gupta, Siddhant.,McFarquhar, Greg M..,O'Brien, Joseph R..,Poellot, Michael R..,Delene, David J..,...&Redemann, Jens.(2022).In situ and satellite-based estimates of cloud properties and aerosol-cloud interactions over the southeast Atlantic Ocean.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(19),21.
MLA	Gupta, Siddhant,et al."In situ and satellite-based estimates of cloud properties and aerosol-cloud interactions over the southeast Atlantic Ocean".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.19(2022):21.