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https://hdl.handle.net/20.500.14094/90005082
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2024-05-09
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90005082 (fulltext)
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メタデータID
90005082
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open access
出版タイプ
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タイトル
Extreme temperature and precipitation response to solar dimming and stratospheric aerosol geoengineering
著者
Ji, Duoying ; Fang, Songsong ; Curry, Charles L. ; Kashimura, Hiroki ; Watanabe, Shingo ; Cole, Jason N. S. ; Lenton, Andrew ; Muri, Helene ; Kravitz, Ben ; Moore, John C.
著者名
Ji, Duoying
著者名
Fang, Songsong
著者名
Curry, Charles L.
著者ID
A2028
研究者ID
1000080635186
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=545c0fa0e041a543520e17560c007669
著者名
Kashimura, Hiroki
樫村, 博基
カシムラ, ヒロキ
所属機関名
理学研究科
著者名
Watanabe, Shingo
著者名
Cole, Jason N. S.
著者名
Lenton, Andrew
著者名
Muri, Helene
著者名
Kravitz, Ben
著者名
Moore, John C.
収録物名
Atmospheric Chemistry and Physics
巻(号)
18(14)
ページ
10133-10156
出版者
Copernicus Publications
刊行日
2018-06-17
公開日
2018-08-02
抄録
We examine extreme temperature and precipitation under two potential geoengineering methods forming part of the Geoengineering Model Intercomparison Project (GeoMIP). The solar dimming experiment G1 is designed to completely offset the global mean radiative forcing due to a CO2-quadrupling experiment (abrupt4 x CO2), while in GeoMIP experiment G4, the radiative forcing due to the representative concentration pathway 4.5 (RCP4.5) scenario is partly offset by a simulated layer of aerosols in the stratosphere. Both G1 and G4 geoengineering simulations lead to lower minimum temperatures (TNn) at higher latitudes and on land, primarily through feedback effects involving high-latitude processes such as snow cover, sea ice and soil moisture. There is larger cooling of TNn and maximum temperatures (TXx) over land compared with oceans, and the land-sea cooling contrast is larger for TXx than TNn. Maximum 5-day precipitation (Rx5day) increases over subtropical oceans, whereas warm spells (WSDI) decrease markedly in the tropics, and the number of consecutive dry days (CDDs) decreases in most deserts. The precipitation during the tropical cyclone (hurricane) seasons becomes less intense, whilst the remainder of the year becomes wetter. Stratospheric aerosol injection is more effective than solar dimming in moderating extreme precipitation (and flooding). Despite the magnitude of the radiative forcing applied in G1 being ∼ 7.7 times larger than in G4 and despite differences in the aerosol chemistry and transport schemes amongst the models, the two types of geoengineering show similar spatial patterns in normalized differences in extreme temperatures changes. Large differences mainly occur at northern high latitudes, where stratospheric aerosol injection more effectively reduces TNn and TXx. While the pattern of normalized differences in extreme precipitation is more complex than that of extreme temperatures, generally stratospheric aerosol injection is more effective in reducing tropical Rx5day, while solar dimming is more effective over extra-tropical regions.
カテゴリ
理学研究科
学術雑誌論文
権利
© Author(s) 2018.
This work is distributed under the Creative Commons Attribution 4.0 License.
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資源タイプ
journal article
言語
English (英語)
ISSN
1680-7316
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eISSN
1680-7324
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関連情報
DOI
https://doi.org/10.5194/acp-18-10133-2018
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