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On the atmospheric response experiment to a Blue Arctic Ocean
| Title: | On the atmospheric response experiment to a Blue Arctic Ocean |
| Authors: | Nakamura, Tetsu Browse this author | | Yamazaki, Koji Browse this author →KAKEN DB | | Honda, Meiji Browse this author | | Ukita, Jinro Browse this author →KAKEN DB | | Jaiser, Ralf Browse this author | | Handorf, Doerthe Browse this author | | Dethloff, Klaus Browse this author |
| Keywords: | Arctic sea ice reduction | | Arctic Oscillation | | extreme weather | | polar amplification | | stratosphere-troposphere coupling |
| Issue Date: | Oct-2016 |
| Publisher: | American Geophysical Union |
| Journal Title: | Geophysical research letters |
| Volume: | 43 |
| Issue: | 19 |
| Start Page: | 10394 |
| End Page: | 10402 |
| Publisher DOI: | 10.1002/2016GL070526 |
| 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. |
| Rights: | An 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. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/65199 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 中村 哲
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