On the atmospheric response experiment to a Blue Arctic Ocean


Contact
Ralf.Jaiser [ at ] awi.de

Abstract

We demonstrated atmospheric responses to a reduction in Arctic sea ice via simulations in which Arctic sea ice decreased stepwise from the present-day range to an ice-free range. In all cases, the tropospheric response exhibited a negative Arctic Oscillation (AO)-like pattern. An intensification of the climatological planetary-scale wave due to the present-day sea ice reduction on the Atlantic side of the Arctic Ocean induced stratospheric polar vortex weakening and the subsequent negative AO. Conversely, strong Arctic warming due to ice-free conditions across the entire Arctic Ocean induced a weakening of the tropospheric westerlies corresponding to a negative AO without troposphere-stratosphere coupling, for which the planetary-scale wave response to a surface heat source extending to the Pacific side of the Arctic Ocean was responsible. Because the resultant negative AO-like response was accompanied by secondary circulation in the meridional plane, atmospheric heat transport into the Arctic increased, accelerating the Arctic amplification.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
42299
DOI https://www.doi.org/10.1002/2016gl070526

Cite as
Nakamura, T. , Yamazaki, K. , Honda, M. , Ukita, J. , Jaiser, R. , Handorf, D. and Dethloff, K. (2016): On the atmospheric response experiment to a Blue Arctic Ocean , Geophysical Research Letters, 43 (19), 10,394-10,402 . doi: https://www.doi.org/10.1002/2016gl070526


Download
[thumbnail of Nakamura_et_al-2016-Geophysical_Research_Letters.pdf]
Preview
PDF
Nakamura_et_al-2016-Geophysical_Research_Letters.pdf

Download (3MB) | Preview
Cite this document as:

Share


Citation

Geographical region
N/A

Research Platforms
N/A

Campaigns
N/A


Actions
Edit Item Edit Item