Joint Seminar: Drivers of Arctic Ocean warming in CMIP5 models

We investigate changes in the Arctic Ocean energy budget simulated by 26 general circulation models in the CMIP5 framework. Our goal is to understand whether the Arctic Ocean warming between 1961 and 2099 is primarily driven by changes in the net atmospheric surface flux or by changes in the meridional oceanic heat flux. We find that the simulated Arctic Ocean warming is driven by positive anomalies in the net atmospheric surface flux in 11 models, by positive anomalies in the meridional oceanic heat flux in 11 models and by positive anomalies in both energy fluxes in four models. The different behaviors are mainly characterized by the different changes in meridional oceanic heat flux that lead to different changes in the turbulent heat loss to the atmosphere. The multi-model ensemble mean is hence not representative of a consensus across the models in Arctic climate projections.

Datum

01.08.2017

Uhrzeit

15:15 Uhr

Ort

Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg

ReferentIn

Clara Burgard, MPI-M

Chair

Guidi Zhou
Karsten Peters

Zur Übersicht