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- W2043863708 abstract "CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 34:1-14 (2007) - doi:10.3354/cr034001 Historical changes in extreme precipitation events in the tropical Pacific region J. Scott Greene1,*, Bryan Paris2, Mark Morrissey3 1Department of Geography, University of Oklahoma, Norman, Oklahoma 73019, USA 2Department of Geography, Arizona State University, Tempe 85287, Arizona, USA 3School of Meteorology, University of Oklahoma, Norman, Oklahoma 73019, USA *Email: jgreene@ou.edu ABSTRACT: Historical changes in tropical Pacific rainfall are analyzed using data from the newly enhanced Comprehensive Pacific Rainfall Database (PACRAIN), a daily rain-gauge database for the Pacific that contains almost 800 sites, some with records dating back to the 1800s. After a complete analysis of the database, 24 stations were selected to examine rainfall changes from 1971 to 2000 using daily data. In addition, a series of extreme event indicators, such as the percent of annual precipitation that falls on days exceeding the 99th percentile, were selected and analyzed in accordance with the World Meteorological Organization (WMO) guidelines for analysis of extreme events. Historical precipitation records in the central and southwestern tropical Pacific showed a trend towards decreasing precipitation during the period 1971 to 2000. This is consistent with previous research on changes from 1971 to 1990, as well as previous results that use data from a different set of stations. There was an increase in the characteristics of extreme precipitation events in most locations, even in those with a decrease in overall precipitation. This could have significant impacts in a hydrological sense, and illustrates the need to use extreme event variables when analyzing climatic patterns. Longer-term patterns were revealed through an analysis of monthly data from 14 stations over the period 1951 to 2004. Results suggest that the role of the Interdecadal Pacific Oscillation (IPO), especially the positive phase, could be important in explaining a significant amount of the observed changes. KEY WORDS: Tropical Pacific precipitation · Trend analysis · Extreme rainfall events Full text in pdf format NextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 34, No. 1. Online publication date: June 14, 2007 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2007 Inter-Research." @default.
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- W2043863708 title "Historical changes in extreme precipitation events in the tropical Pacific region" @default.
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