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The radiative impact of clouds on the response of the midlatitude circulation to global warming

Albern, Nicole Brigitte Silvia

Abstract (englisch):
Clouds and the midlatitude circulation are strongly coupled via radiation. Previous work showed that about half of the annual-mean zonal-mean jet stream and storm track responses to global warming can be attributed to cloud-radiative changes. In this thesis, we investigate the impact of cloud-radiative changes on the global warming response of the midlatitude jet streams and storm tracks across seasons and regions with special focus on the North Atlantic, North Pacific and Southern Hemisphere. To this end, we perform global simulations with the atmospheric component of the ICOsahedral Nonhydrostatic (ICON) model in a present-day setup. We prescribe sea-surface temperatures (SST) to isolate the impact of changes in atmospheric cloud-radiative heating on the midlatitude circulation, and mimic global warming by a uniform 4K or spatially-varying SST increase. We use the cloud-locking method to decompose the midlatitude circulation response into contributions from changes in cloud-radiative properties and from changes in SST.

In the first part of the thesis, we investigate the impact of global cloud-radiative changes on the response of the midlatitude jet streams and storm tracks to global warming. ... mehr

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Volltext §
DOI: 10.5445/IR/1000129873
Veröffentlicht am 26.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Hochschulschrift
Publikationsdatum 26.02.2021
Sprache Englisch
Identifikator KITopen-ID: 1000129873
Weitere HGF-Programme 12.11.32 (POF IV, LK 01) Advancing atmospheric and Earth system models
Verlag Karlsruher Institut für Technologie (KIT)
Umfang viii, 148 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Prüfungsdatum 23.10.2020
Referent/Betreuer Prof. J. Pinto
Projektinformation CONSTRAin (BMBF, 01LK1509A)
Schlagwörter cloud-circulation coupling, cloud‐radiative interactions, midlatitude circulation, jet stream, regional climate change, storm track, global climate model
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