reference : Attribution of extreme rainfall from Hurricane Harvey, August 2017

JSON YAML text HTML Turtle N-Triples JSON Triples RDF+XML RDF+JSON Graphviz SVG
/reference/c285c842-fcd3-45b2-88ec-6383a4b57f2d
Bibliographic fields
reftype Journal Article
Abstract During August 25–30, 2017, Hurricane Harvey stalled over Texas and caused extreme precipitation, particularly over Houston and the surrounding area on August 26–28. This resulted in extensive flooding with over 80 fatalities and large economic costs. It was an extremely rare event: the return period of the highest observed three-day precipitation amount, 1043.4 mm 3dy −1 at Baytown, is more than 9000 years (97.5% one-sided confidence interval) and return periods exceeded 1000 yr (750 mm 3dy −1 ) over a large area in the current climate. Observations since 1880 over the region show a clear positive trend in the intensity of extreme precipitation of between 12% and 22%, roughly two times the increase of the moisture holding capacity of the atmosphere expected for 1 °C warming according to the Clausius–Clapeyron (CC) relation. This would indicate that the moisture flux was increased by both the moisture content and stronger winds or updrafts driven by the heat of condensation of the moisture. We also analysed extreme rainfall in the Houston area in three ensembles of 25 km resolution models. The first also shows 2 × CC scaling, the second 1 × CC scaling and the third did not have a realistic representation of extreme rainfall on the Gulf Coast. Extrapolating these results to the 2017 event, we conclude that global warming made the precipitation about 15% (8%–19%) more intense, or equivalently made such an event three (1.5–5) times more likely. This analysis makes clear that extreme rainfall events along the Gulf Coast are on the rise. And while fortifying Houston to fully withstand the impact of an event as extreme as Hurricane Harvey may not be economically feasible, it is critical that information regarding the increasing risk of extreme rainfall events in general should be part of the discussion about future improvements to Houston’s flood protection system.
Author van Oldenborgh, Geert Jan ; van der Wiel, Karin; Antonia Sebastian; Roop Singh; Julie Arrighi; Friederike Otto; Karsten Haustein; Sihan Li; Gabriel Vecchi; Heidi Cullen
DOI 10.1088/1748-9326/aa9ef2
ISSN 1748-9326
Issue 12
Journal Environmental Research Letters
Pages 124009
Title Attribution of extreme rainfall from Hurricane Harvey, August 2017
Volume 12
Year 2017
Bibliographic identifiers
_record_number 25423
_uuid c285c842-fcd3-45b2-88ec-6383a4b57f2d