Tropical cloud-radiative changes contribute to robust climate change-induced jet exit strengthening over Europe during boreal winter
- Autor(en)
- Nicole Albern, Aiko Voigt, Joaquim G Pinto
- Abstrakt
The North Atlantic jet stream is projected to extend eastward towards Europe in boreal winter in response to climate change. We show that this response is robust across a hierarchy of climate models and climate change scenarios. We further show that cloud-radiative changes contribute robustly to the eastward extension of the jet stream in three atmosphere models, but lead to model uncertainties in the jet stream response over the North Atlantic. The magnitude of the cloud contribution depends on the model, consistent with differences in the magnitude of changes in upper-tropospheric cloud-radiative heating. We further study the role of regional cloud changes in one of the three atmosphere models, i.e. the ICON model. Tropical cloud-radiative changes dominate the cloud impact on the eastward extension of the jet stream in ICON. Cloud-radiative changes over the Indian Ocean, western tropical Pacific, and eastern tropical Pacific contribute to this response, while tropical Atlantic cloud changes have a minor impact. Our results highlight the importance of upper-tropospheric tropical clouds for the regional circulation response to climate change over the North Atlantic-European region and uncertainty therein.
- Organisation(en)
- Institut für Meteorologie und Geophysik
- Externe Organisation(en)
- Institute of Meteorology and Climate Research, Columbia University in the City of New York
- Journal
- Environmental Research Letters
- Band
- 16
- ISSN
- 1748-9326
- DOI
- https://doi.org/10.1088/1748-9326/ac13f0
- Publikationsdatum
- 07-2021
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105204 Klimatologie, 105206 Meteorologie
- Schlagwörter
- ASJC Scopus Sachgebiete
- Public Health, Environmental and Occupational Health, Allgemeine Umweltwissenschaft, Renewable Energy, Sustainability and the Environment
- Sustainable Development Goals
- SDG 13 – Maßnahmen zum Klimaschutz
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/ebbed9a5-a662-487e-b9db-b95d3408b511