reference : Changes in intense precipitation over the central United States

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Bibliographic fields
reftype Journal Article
Abstract In examining intense precipitation over the central United States, the authors consider only days with precipitation when the daily total is above 12.7 mm and focus only on these days and multiday events constructed from such consecutive precipitation days. Analyses show that over the central United States, a statistically significant redistribution in the spectra of intense precipitation days/events during the past decades has occurred. Moderately heavy precipitation events (within a 12.7–25.4 mm day−1 range) became less frequent compared to days and events with precipitation totals above 25.4 mm. During the past 31 yr (compared to the 1948–78 period), significant increases occurred in the frequency of “very heavy” (the daily rain events above 76.2 mm) and extreme precipitation events (defined as daily and multiday rain events with totals above 154.9 mm or 6 in.), with up to 40% increases in the frequency of days and multiday extreme rain events. Tropical cyclones associated with extreme precipitation do not significantly contribute to the changes reported in this study. With time, the internal precipitation structure (e.g., mean and maximum hourly precipitation rates within each preselected range of daily or multiday event totals) did not noticeably change. Several possible causes of observed changes in intense precipitation over the central United States are discussed and/or tested.
Author Groisman, P.Y. Knight, R.W. Karl, T.R.
DOI 10.1175/JHM-D-11-039.1
ISSN 1525-755X
Journal Journal of Hydrometeorology
Keywords North America, ; Hydrologic cycle, ; Extreme events, ; Precipitation, ; In situ observations
Pages 47-66
Title Changes in intense precipitation over the central United States
Volume 13
Year 2012
Bibliographic identifiers
.reference_type 0
_chapter ["Ch. 2: Our Changing Climate FINAL","Ch. 3: Water Resources FINAL","Appendix 3: Climate Science FINAL"]
_record_number 211
_uuid 5d909426-fab3-4dc8-af56-e5fe414ca97a