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  1. 139 大気海洋研究所
  2. 10 気候システム研究系
  3. 1391010 学術雑誌
  1. 0 資料タイプ別
  2. 10 学術雑誌論文
  3. 014 自然科学

Effects of atmospheric sphericity on stratospheric chemistry and dynamics over Antarctica

http://hdl.handle.net/2261/51892
9cab3a34-9c18-416a-af0a-8b59d5e1c5d4
名前 / ファイル ライセンス アクション
Nakajima2005JGRA_H24P105.pdf Nakajima2005JGRA_H24P105.pdf (1.6 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-01-10
タイトル
タイトル Effects of atmospheric sphericity on stratospheric chemistry and dynamics over Antarctica
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Kurokawa, Jun-ichi

× Kurokawa, Jun-ichi

WEKO 3540

Kurokawa, Jun-ichi

Search repository
Akiyoshi, Hideharu

× Akiyoshi, Hideharu

WEKO 3541

Akiyoshi, Hideharu

Search repository
Nagashima, Tatsuya

× Nagashima, Tatsuya

WEKO 3542

Nagashima, Tatsuya

Search repository
Masunaga, Hirohiko

× Masunaga, Hirohiko

WEKO 3543

Masunaga, Hirohiko

Search repository
Nakajima, Teruyuki

× Nakajima, Teruyuki

WEKO 3544

Nakajima, Teruyuki

Search repository
Takahashi, Masaaki

× Takahashi, Masaaki

WEKO 3545

Takahashi, Masaaki

Search repository
Nakane, Hideaki

× Nakane, Hideaki

WEKO 3546

Nakane, Hideaki

Search repository
著者所属
著者所属 Fujitsu FIP Corporation
著者所属
著者所属 National Institute for Environmental Studies
著者所属
著者所属 Department of Atmospheric Science, Colorado State University
著者所属
著者所属 Center for Climate System Research, University of Tokyo
抄録
内容記述タイプ Abstract
内容記述 Atmospheric sphericity is an important factor that must be considered in order to evaluate an accurate ozone loss rate in the polar stratosphere. The built-in plane-parallel radiative transfer scheme of a nudging chemical transport model (CTM) and an atmospheric general circulation model (AGCM) with coupled chemistry is modified by a pseudospherical approximation. The plane-parallel atmosphere radiative transfer version (PPA version) is compared with the pseudospherical atmosphere radiative transfer version (SA version) for both the nudging CTM and AGCM. The nudging CTM can isolate the chemical effects for a given dynamical field, while the interaction among the chemical, radiative, and dynamical processes can be studied with the AGCM. The present analysis focuses on Antarctica during an ozone hole period. In the ozone loss period over Antarctica, ozone starts to decrease earlier and minimum value of total ozone becomes lower in the SA versions of both the nudging CTM and the AGCM than in the corresponding PPA versions. The ozone mixing ratio decreases earlier in the SA version because of an earlier increase of ClO concentration initiated by the upward actinic flux at solar zenith angles greater than 90°. Dynamics plays an important role as well as the chemical processes. During the ozone recovery period, the ozone distribution becomes almost the same in the SA and PPA versions of the nudging CTM, while in the AGCM the ozone amount in the SA version remains at lower values compared to those of the PPA version. In the AGCM, a decrease of ozone over Antarctica enhances the latitudinal gradient of temperature and thus strengthens the polar vortex in the SA version. A resultant delay of the polar vortex breakup causes the delay of the ozone recovery. For the AGCM, ensemble runs are performed. The ensemble experiment exhibits large ozone variances after the middle of December, when the ozone recovery is dynamically controlled. Most ensemble members of the AGCM show a delay of the polar vortex breakup in the SA version, while a few members show opposite results. In the latter members, the polar vortex breakup is strongly affected by the enhanced EP flux from the troposphere around 100 hPa, which causes the variances in the ozone recovery period. Most members, however, do not show large statistical variances; that justifies the conclusions from the ensemble means.
書誌情報 Journal of geophysical research. D

巻 110, 号 21, p. D21305, 発行日 2005-11-04
ISSN
収録物識別子タイプ ISSN
収録物識別子 01480227
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA10819765
DOI
関連識別子
識別子タイプ DOI
関連識別子 info:doi/10.1029/2005JD005798
権利
権利情報 Copyright 2005 by the American Geophysical Union.
日本十進分類法
主題 451
主題Scheme NDC
出版者
出版者 American Geophysical Union
異版である
関連タイプ isVersionOf
関連識別子
識別子タイプ URI
関連識別子 http://doi.org/10.1029/2005JD005798
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