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Cloud‐Radiative Impact on the Regional Responses of the Midlatitude Jet Streams and Storm Tracks to Global Warming

Albern, Nicole; Voigt, Aiko; Pinto, Joaquim G.

Abstract:
Previous work demonstrated the strong radiative coupling between clouds and the mid‐latitude circulation. Here, we investigate the impact of cloud‐radiative changes on the global warming response of the mid‐latitude jet streams and storm tracks in the North Atlantic, North Pacific and Southern Hemisphere. To this end, we use the ICON global atmosphere model in present‐day setup and with the cloud‐locking method. Sea surface temperatures (SST) are prescribed to isolate the circulation response to atmospheric cloud‐radiative heating. In the annual mean, cloud‐radiative changes contribute one‐ to two‐thirds to the poleward jet shift in all three ocean basins, and support the jet strengthening in the North Atlantic and Southern Hemisphere. Cloud‐radiative changes also impact the storm track, but the impact is more diverse across the three ocean basins. The cloud‐radiative impact on the North Atlantic and North Pacific jets varies little from season to season in absolute terms, whereas its relative importance changes over the course of the year. In the Southern Hemisphere, cloud‐radiative changes strengthen the jet in all seasons, whereas their impact on the jet shift is limited to austral summer and fall. ... mehr

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Preprint §
DOI: 10.5445/IR/1000095096
Veröffentlicht am 27.05.2019
Verlagsausgabe §
DOI: 10.5445/IR/1000095096/pub
Frei zugänglich ab 25.11.2019
Originalveröffentlichung
DOI: 10.1029/2018MS001592
Coverbild
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1942-2466, 1942-2466
KITopen-ID: 1000095096
HGF-Programm 12.01.02 (POF III, LK 01)
Erschienen in Journal of advances in modeling earth systems
Band 11
Heft 7
Seiten 1940-1958
Vorab online veröffentlicht am 24.05.2019
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