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Regionally coupled atmosphere ‐ ocean ‐ marine biogeochemistry model ROM: 2. Studying the climate change signal in the North Atlantic and Europe

Sein, Dmitry V.; Gröger, Matthias; Cabos, William; Alvarez-Garcia, Francisco J.; Hagemann, Stefan; Pinto, Joaquim G. 1; Izquierdo, Alfredo; Vara, Alba; Koldunov, Nikolay V.; Dvornikov, Anton Yu.; Limareva, Natalia; Alekseeva, Evgenia; Martinez-Lopez, Benjamin; Jacob, Daniela
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)


Climate simulations for the North Atlantic and Europe for recent and future conditions simulated with the regionally coupled ROM model are analyzed and compared to the results from the MPI‐ESM. The ROM simulations also include a biogeochemistry and ocean tides. For recent climate conditions, ROM generally improves the simulations compared to the driving model MPI‐ESM. Reduced oceanic biases in the Northern Atlantic are found, as well as a better simulation of the atmospheric circulation, notably storm tracks and blocking. Regarding future climate projections for the 21st century following the RCP 4.5 and 8.5 scenarios, MPI‐ESM and ROM largely agree qualitatively on the climate change signal over Europe. However, many important differences are identified. For example, ROM shows an SST cooling in the Subpolar Gyre, which is not present in MPI‐ESM. Under the RCP8.5 scenario, ROM Arctic sea ice cover is thinner and reaches the seasonally ice‐free state by 2055, well before MPI‐ESM. This shows the decisive importance of higher ocean resolution and regional coupling for determining the regional responses to global warming trends. Regarding biogeochemistry, both ROM and MPI‐ESM simulate a widespread decline in winter nutrient concentration in the North Atlantic of up to ~35%. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000121025
DOI: 10.1029/2019MS001646
Zitationen: 26
Zitationen: 31
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Universität Karlsruhe (TH) – Interfakultative Einrichtungen (Interfakultative Einrichtungen)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 08.2020
Sprache Englisch
Identifikator ISSN: 1942-2466, 1942-2466
KITopen-ID: 1000121025
HGF-Programm 12.01.02 (POF III, LK 01) Proc.res.f.multisc.predictab.of weather
Erschienen in Journal of advances in modeling earth systems
Verlag American Geophysical Union (AGU)
Band 12
Heft 8
Seiten e2019MS001646
Vorab online veröffentlicht am 29.06.2020
Nachgewiesen in Scopus
Web of Science
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