2024-03-28T09:53:04Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/651992022-11-17T02:08:08Zhdl_2115_20051hdl_2115_144On the atmospheric response experiment to a Blue Arctic OceanNakamura, TetsuYamazaki, KojiHonda, MeijiUkita, JinroJaiser, RalfHandorf, DoertheDethloff, KlausArctic sea ice reductionArctic Oscillationextreme weatherpolar amplificationstratosphere-troposphere coupling450We 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.American Geophysical UnionJournal Articleapplication/pdfhttp://hdl.handle.net/2115/65199https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/65199/1/Nakamura_et_al-2016-Geophysical_Research_Letters.pdf0094-8276Geophysical research letters431910394104022016-10enginfo:doi/10.1002/2016GL070526An edited version of this paper was published by AGU. Copyright 2016 American Geophysical Union.Tetsu Nakamura
, Koji Yamazaki, Meiji Honda, Jinro Ukita, Ralf Jaiser, Dörthe Handorf,and Klaus Dethloff, (2016), On the atmospheric response experiment to a Blue Arctic Ocean, Geophygical Research Letters, 43, 10394-10402, doi:10.1002/
2016GL07052. To view the published open abstract, go to http://dx.doi.org and enter the DOI.publisher