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  Quantification of temperature persistence over the Northern Hemisphere land-area

Pfleiderer, P., Coumou, D. (2018): Quantification of temperature persistence over the Northern Hemisphere land-area. - Climate Dynamics, 51, 1-2, 627-637.
https://doi.org/10.1007/s00382-017-3945-x

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 Creators:
Pfleiderer, Peter1, Author              
Coumou, Dim1, Author              
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              

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 Abstract: Extreme weather events such as heat waves and floods are damaging to society and their contribution to future climate impacts is expected to be large. Such extremes are often related to persistent local weather conditions. Weather persistence is linked to sea surface temperatures, soil-moisture (especially in summer) and large-scale circulation patterns and these factors can alter under past and future climate change. Though persistence is a key characteristic for extreme weather events, to date the climatology and potential changes in persistence have only been poorly documented. Here, we present a systematic analysis of temperature persistence for the northern hemisphere land area. We define persistence as the length of consecutive warm or cold days and use spatial clustering techniques to create regional persistence distributions. We find that persistence is longest in the Arctic and shortest in the mid-latitudes. Parameterizations of the regional persistence distributions show that they are characterized by an exponential decay with a drop in the decay rate for very persistent events, implying that feedback mechanisms are important in prolonging these events. For the mid-latitudes, we find that persistence in summer has increased over the past 60 years. The changes are particularly pronounced for prolonged events suggesting a lengthening in the duration of heat waves.

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 Dates: 2018
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1007/s00382-017-3945-x
PIKDOMAIN: Earth System Analysis - Research Domain I
eDoc: 7752
Research topic keyword: Atmosphere
Research topic keyword: Climate impacts
Research topic keyword: Extremes
Research topic keyword: Weather
Regional keyword: Europe
Regional keyword: Global
Organisational keyword: RD1 - Earth System Analysis
Working Group: Earth System Modes of Operation
 Degree: -

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Title: Climate Dynamics
Source Genre: Journal, SCI, Scopus, p3
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Pages: - Volume / Issue: 51 (1-2) Sequence Number: - Start / End Page: 627 - 637 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals77