Satellite-based estimate of the variability of warm cloud properties associated with aerosol and meteorological conditions

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor.author Liu, Yuqin
dc.contributor.author Zhang, Jiahua
dc.contributor.author Zhou, Putian
dc.contributor.author Lin, Tao
dc.contributor.author Hong, Juan
dc.contributor.author Shi, Lamei
dc.contributor.author Yao, Fengmei
dc.contributor.author Wu, Jun
dc.contributor.author Guo, Huadong
dc.contributor.author de Leeuw, Gerrit
dc.date.accessioned 2019-01-11T08:13:01Z
dc.date.available 2019-01-11T08:13:01Z
dc.date.issued 2018-12-21
dc.identifier.citation Liu , Y , Zhang , J , Zhou , P , Lin , T , Hong , J , Shi , L , Yao , F , Wu , J , Guo , H & de Leeuw , G 2018 , ' Satellite-based estimate of the variability of warm cloud properties associated with aerosol and meteorological conditions ' Atmospheric Chemistry and Physics , vol. 18 , no. 24 , pp. 18187-18202 . https://doi.org/10.5194/acp-18-18187-2018 en
dc.identifier.issn 1680-7316
dc.identifier.other PURE: 121053601
dc.identifier.other PURE UUID: 26107b7c-b2f6-46ab-866a-0412992d25a7
dc.identifier.other WOS: 000454144300004
dc.identifier.other Scopus: 85059382160
dc.identifier.other ORCID: /0000-0003-0803-7337/work/52695957
dc.identifier.uri http://hdl.handle.net/10138/290312
dc.description.abstract Aerosol-cloud interaction (ACI) is examined using 10 years of data from the MODIS/Terra (morning orbit) and MODIS/Aqua (afternoon orbit) satellites. Aerosol optical depth (AOD) and cloud properties retrieved from both sensors are used to explore in a statistical sense the morning-to-afternoon variation of cloud properties in conditions with low and high AOD, over both land and ocean. The results show that the interaction between aerosol particles and clouds is more complex and of greater uncertainty over land than over ocean. The variation in d(Cloud_X), defined as the mean change in cloud property Cloud_X between the morning and afternoon overpasses in high-AOD conditions minus that in low-AOD conditions, is different over land and ocean. This applies to cloud droplet effective radius (CDR), cloud fraction (CF) and cloud top pressure (CTP), but not to cloud optical thickness (COT) and cloud liquid water path (CWP). Both COT and CWP increase over land and ocean after the time step, irrespective of the AOD. However, the initial AOD conditions can affect the amplitude of variation of COT and CWP. The effects of initial cloud fraction and meteorological conditions on the change in CF under lowand high-AOD conditions after the 3 h time step over land are also explored. Two cases are considered: (1) when the cloud cover increases and (2) when the cloud cover decreases. For both cases, we find that almost all values of d(CF) are positive, indicating that the variations of CF are larger in high AOD than that in low AOD after the 3 h time step. The results also show that a large increase in cloud fraction occurs when scenes experience large AOD and stronger upward motion of air parcels. Furthermore, the increase rate of cloud cover is larger for high AOD with increasing relative humidity (RH) when RH is larger than 20 %. We also find that a smaller increase in cloud fraction occurs when scenes experience larger AOD and larger initial cloud cover. Overall, the analysis of the diurnal variation of cloud properties provides a better understanding of aerosol-cloud interaction over land and ocean. en
dc.format.extent 16
dc.language.iso eng
dc.relation.ispartof Atmospheric Chemistry and Physics
dc.rights en
dc.subject YANGTZE-RIVER DELTA en
dc.subject CONVECTIVE CLOUDS en
dc.subject POLLUTION AEROSOL en
dc.subject STRATIFORM CLOUDS en
dc.subject OPTICAL DEPTH en
dc.subject EAST-ASIA en
dc.subject CHINA en
dc.subject TRENDS en
dc.subject SMOKE en
dc.subject PRECIPITATION en
dc.subject 114 Physical sciences en
dc.title Satellite-based estimate of the variability of warm cloud properties associated with aerosol and meteorological conditions en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.5194/acp-18-18187-2018
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl

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