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