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Extreme dry and wet spells face changes in their duration and timing

Breinl, Korbinian and Di Baldassarre, Giuliano and Mazzoleni, Maurizio and Lun, David and Vico, Giulia (2020). Extreme dry and wet spells face changes in their duration and timing. Environmental Research Letters. 15 , 074040 , 1-13
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Abstract

Dry spells are sequences of days without precipitation. They can have negative implications for societies, including water security and agriculture. For example, changes in their duration and within-year timing can pose a threat to food production and wildfire risk. Conversely, wet spells are sequences of days with precipitation above a certain threshold, and changes in their duration and within-year timing can impact agriculture, flooding or the prevalence of water-related vector-borne diseases. Here we assess changes in the duration and within-year timing of extreme dry and wet spells over 60 years (1958-2017) using a consistent global land surface precipitation dataset of 5093 rain gauge locations. The dataset allowed for detailed spatial analyses of the United States, Europe and Australia. While many locations exhibit statistically significant changes in the duration of extreme dry and wet spells, the changes in the within-year timing are less often significant. Our results show consistencies with observations and projections from state-of-the-art climate and water resources research. In addition, we provide new insights regarding trends in the timing of extreme dry and wet spells, an aspect being equally important for possible future implications of extremes in a changing climate, which has not yet received the same level of attention and is characterized by larger uncertainty.

Authors/Creators:Breinl, Korbinian and Di Baldassarre, Giuliano and Mazzoleni, Maurizio and Lun, David and Vico, Giulia
Title:Extreme dry and wet spells face changes in their duration and timing
Year of publishing :2020
Volume:15
Article number:074040
Number of Pages:13
Publisher:IOP Publishing Ltd
ISSN:1748-9326
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Meteorology and Atmospheric Sciences
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Climate Research
Keywords:extreme dry spells, extreme wet spells, change in duration, change in timing, climate change, global analysis, global trends
URN:NBN:urn:nbn:se:slu:epsilon-p-105249
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-105249
Additional ID:
Type of IDID
DOI10.1088/1748-9326/ab7d05
Web of Science (WoS)000552682300001
ID Code:17421
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: SLUpub Connector
Deposited On:07 Sep 2020 12:40
Metadata Last Modified:07 Sep 2020 12:40

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