Have tropical cyclones been feeding more extreme rainfall?

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dc.contributor.authorLau, K.-M.
dc.contributor.authorZhou, Yaping
dc.contributor.authorWu, H.-T.
dc.date.accessioned2022-07-06T21:25:47Z
dc.date.available2022-07-06T21:25:47Z
dc.date.issued2008-12-13
dc.description.abstractWe have conducted a study of the relationship between tropical cyclone (TC) and extreme rain events using GPCP and TRMM rainfall data, and storm track data for July through November (JASON) in the North Atlantic (NAT) and the western North Pacific (WNP). Extreme rain events are defined in terms of percentile rainrate, and TC-rain by rainfall associated with a named TC. Results show that climatologically, 8% of rain events and 17% of the total rain amount in NAT are accounted by TCs, compared to 9% of rain events, and 21% of rain amount in WNP. The fractional contribution of accumulated TC-rain to total rain, Ω, increases nearly linearly as a function of rainrate. Extending the analyses using GPCP pentad data for 1979–2005, and for the post-SSM/I period (1988–2005), we find that while there is no significant trend in the total JASON rainfall over NAT or WNP, there is a positive significant trend in heavy rain over both basins for the 1979–2005 period, but not for the post-SSM/I period. Trend analyses of Ω for both periods indicate that TCs have been feeding increasingly more to rainfall extremes in NAT, where the expansion of the warm pool area can explain slightly more than 50% of the change in observed trend in total TC rainfall. In WNP, trend signals for Ω are mixed, and the long-term relationship between TC rain and warm pool area is strongly influenced by interannual and interdecadal variability.en_US
dc.description.sponsorshipThis work is supported by the Precipitation Measuring Mission (Headquarter Manager: Dr. R. Kakar), NASA Earth Science Division. We thank Dr. Chris Landsea and two anonymous reviewers for constructive comments that have improved the manuscript.en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008JD009963en_US
dc.format.extent12 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2vvlt-9hom
dc.identifier.citationLau, K.-M., Y. P. Zhou, and H.-T. Wu (2008), Have tropical cyclones been feeding more extreme rainfall?,J. Geophys.Res.,113, D23113, doi:10.1029/2008JD009963en_US
dc.identifier.urihttps://doi.org/10.1029/2008JD009963
dc.identifier.urihttp://hdl.handle.net/11603/25109
dc.language.isoen_USen_US
dc.publisherAGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
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.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleHave tropical cyclones been feeding more extreme rainfall?en_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-7812-851Xen_US

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