Facets of Arctic energy accumulation based on observations and reanalyses 2000–2015

Autor(en)
Michael Mayer, Leopold Haimberger, Marianne Pietschnig, Andrea Storto
Abstrakt

Various observation- and reanalysis-based estimates of sea ice mass and ocean heat content trends imply that the energy imbalance of the Arctic climate system was similar [1.0 (0.9,1.2) Wm(-2)] to the global ocean average during the 2000-2015 period. Most of this extra heat warmed the ocean, and a comparatively small fraction went into sea ice melt. Poleward energy transports and radiation contributed to this energy increase at varying strengths. On a seasonal scale, stronger radiative energy input during summer associated with the ice-albedo feedback enhances seasonal oceanic heat uptake and sea ice melt. In return, lower sea ice extent and higher sea surface temperatures lead to enhanced heat release from the ocean during fall. This weakens meridional temperature gradients, consequently reducing atmospheric energy transports into the polar cap. The seasonal cycle of the Arctic energy budget is thus amplified, whereas the Arctic's long-term energy imbalance is close to the global mean.

Organisation(en)
Institut für Meteorologie und Geophysik
Externe Organisation(en)
Euro-Mediterranean Centre for Climate Change (CMCC)
Journal
Geophysical Research Letters
Band
43
Seiten
10,420-10,429
Anzahl der Seiten
10
ISSN
0094-8276
DOI
https://doi.org/10.1002/2016GL070557
Publikationsdatum
10-2016
Peer-reviewed
Ja
ÖFOS 2012
105205 Klimawandel, 105204 Klimatologie
Schlagwörter
ASJC Scopus Sachgebiete
Geophysics, Earth and Planetary Sciences(all)
Sustainable Development Goals
SDG 13 – Maßnahmen zum Klimaschutz
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/facets-of-arctic-energy-accumulation-based-on-observations-and-reanalyses-20002015(94abb857-a0c2-48ed-b5d2-c329f74379b8).html