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  Footprint of greenhouse forcing in daily temperature variability

Kotz, M., Wenz, L., Levermann, A. (2021): Footprint of greenhouse forcing in daily temperature variability. - Proceedings of the National Academy of Sciences of the United States of America (PNAS), 118, 32, e2103294118.
https://doi.org/10.1073/pnas.2103294118

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 Urheber:
Kotz, Maximilian1, Autor              
Wenz, Leonie1, Autor              
Levermann, Anders1, Autor              
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              

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 Zusammenfassung: Changes in mean climatic conditions will affect natural and societal systems profoundly under continued anthropogenic global warming. Changes in the high-frequency variability of temperature exert additional pressures, yet the effect of greenhouse forcing thereon has not been fully assessed or identified in observational data. Here, we show that the intramonthly variability of daily surface temperature changes with distinct global patterns as greenhouse gas concentrations rise. In both reanalyses of historical observations and state-of-the-art projections, variability increases at low to mid latitudes and decreases at northern mid to high latitudes with enhanced greenhouse forcing. These latitudinally polarized daily variability changes are identified from internal climate variability using a recently developed signal-to-noise-maximizing pattern-filtering technique. Analysis of a multimodel ensemble from the Coupled Model Intercomparison Project Phase 6 shows that these changes are attributable to enhanced greenhouse forcing. By the end of the century under a business-as-usual emissions scenario, daily temperature variability would continue to increase by up to a further 100% at low latitudes and decrease by 40% at northern high latitudes. Alternative scenarios demonstrate that these changes would be limited by mitigation of greenhouse gases. Moreover, global changes in daily variability exhibit strong covariation with warming across climate models, suggesting that the equilibrium climate sensitivity will also play a role in determining the extent of future variability changes. This global response of the high-frequency climate system to enhanced greenhouse forcing is likely to have strong and unequal effects on societies, economies, and ecosystems if mitigation and protection measures are not taken.

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Sprache(n): eng - Englisch
 Datum: 2021-06-182021-08-022021-08-10
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: PIKDOMAIN: RD4 - Complexity Science
DOI: 10.1073/pnas.2103294118
Organisational keyword: RD4 - Complexity Science
Working Group: Data-based analysis of climate decisions
Research topic keyword: Atmosphere
Research topic keyword: Climate impacts
MDB-ID: yes - 3242
 Art des Abschluß: -

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Projektname : Impact of intensified weather extremes on Europe's economy (ImpactEE)
Grant ID : Az.: 93350
Förderprogramm : Europe and Global Challenges
Förderorganisation : VolkswagenStiftung

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Titel: Proceedings of the National Academy of Sciences of the United States of America (PNAS)
Genre der Quelle: Zeitschrift, SCI, Scopus, p3
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 118 (32) Artikelnummer: e2103294118 Start- / Endseite: - Identifikator: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals410
Publisher: National Academy of Sciences (NAS)