Analysis of the weekly cycle of aerosol optical depth using AERONET and MODIS data

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dc.contributor.authorXia, Xiangao
dc.contributor.authorEck, Thomas
dc.contributor.authorHolben, Brent N.
dc.contributor.authorPhillippe, Goloub
dc.contributor.authorChen, Hongbin
dc.date.accessioned2024-04-29T17:02:06Z
dc.date.available2024-04-29T17:02:06Z
dc.date.issued2008-07-29
dc.description.abstractMulti-year Aerosol Robotic Network (AERONET) and Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD) data are used to study AOD weekly variations at the global scale. A clear weekly cycle of AOD is observed in the United States (U.S.) and Central Europe. AOD during the weekday is larger than that during the weekend in 36 out of 43 AERONET sites in the U.S. The average U.S. weekend effect (the percent difference in AOD during the weekday and the weekend) is 3.8%. A weekly periodicity with lower AODs on Sunday and Monday and higher AODs from Wednesday until Saturday is revealed over Central Europe and the average weekend effect there is 4.0%. The weekly cycle in urban sites is greater than that in rural sites. AOD during the weekday is also significantly larger than that during the weekend in urban AERONET sites in South America and South Korea. However, a reversed AOD weekly cycle is observed in the Middle East and India. AODs on Thursday and Friday, the “weekend” for Middle East cultures, are relatively lower than AODs on other days. There is no clear weekly variation of AOD over eastern China. The striking feature in this region is the occurrence of much higher AOD on Sunday and this phenomenon is independent of season. The analysis of MODIS aerosol data is in good agreement with that of AERONET data.
dc.description.sponsorshipOur thanks are extended to the individual principal investigators and site managers who have maintained an active interest in the AERONET project and resulted in long-term observations. We also acknowledge the MODIS mission scientists and associated NASA personnel for the production of the MODIS data used in this research effort. The research is supported by the National Basic Research Program of China (2006CB403706), the National Science Foundation of China (40775009) and the Knowledge Innovation Program of the Chinese Academy of Sciences (IAP07115).
dc.description.urihttps://onlinelibrary.wiley.com/doi/abs/10.1029/2007JD009604
dc.format.extent11 pages
dc.genrejournal articles
dc.identifierdoi:10.13016/m2e06n-7yph
dc.identifier.citationXia, Xiangao, Tom F. Eck, Brent N. Holben, Goloub Phillippe, and Hongbin Chen. “Analysis of the Weekly Cycle of Aerosol Optical Depth Using AERONET and MODIS Data.” Journal of Geophysical Research: Atmospheres 113, no. D14 (2008). https://doi.org/10.1029/2007JD009604.
dc.identifier.urihttps://doi.org/10.1029/2007JD009604
dc.identifier.urihttp://hdl.handle.net/11603/33496
dc.language.isoen
dc.publisherAGU
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II
dc.relation.ispartofUMBC Faculty collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.subjectaeronet
dc.subjectAerosol optical depth
dc.subjectweekend effect
dc.titleAnalysis of the weekly cycle of aerosol optical depth using AERONET and MODIS data
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0001-9801-1610

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