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タイトル
和文: 
英文:Global Coastal Exposure due to Sea-level Rise beyond Tipping Points with Multiple Warming Pathways 
著者
和文: 田渡竜乃介, 井芹慶彦, 木口雅司, 鼎信次郎.  
英文: Ryunosuke Tawatari, Yoshihiko Iseri, Masashi Kiguchi, Shinjiro Kanae.  
言語 English 
掲載誌/書名
和文: 
英文: 
巻, 号, ページ        
出版年月 2016年12月13日 
出版者
和文: 
英文: 
会議名称
和文: 
英文:American Geophysical Union 2016 Fall meeting 
開催地
和文:サンフランシスコ 
英文:San Francisco 
公式リンク https://agu.confex.com/agu/fm16/meetingapp.cgi/Paper/171181
 
アブストラクト Sea-level is observed and estimated to continue rising. In the future, the rise could be abrupt and irreversible in century to millennial timescale even if we conduct strong reduction of greenhouse gas emission. Greenland ice sheet and West Antarctic ice sheet are considered as attributable climate systems which would significantly enhance presently-projected sea-level rise by several meters if global mean temperature passes certain “Tipping points” which would exist around +1-5 degree Celsius above present temperature (1980-1999 average). Therefore, vulnerable coastal low-lying area, especially small islands, deltas or poor developing countries, would suffer from semi-permanent inundation and forced to counteract due to the enhanced sea-level rise. This study estimate range of sea-level rise until the year 2300 and 3000 considering excess of tipping points with using multiple levels of temperature scenarios which consist of excess tipping points and non-excess tipping points pathways. We extract state-of-the-art knowledge of tipping elements from paper reviewing to express reasonable relationship between temperature and abruptly-changing sea-level transition across the ages. This study also calculate coastal exposure globally as affected population, area and asset below the estimated sea-level for each countries with overlaying 30 arc-second gridded topography, population distribution and the sea-level. The result indicates which country would be critically affected if we follow overshooting pathways. Furthermore, this study visualize uncertain coastal exposure due to sea-level rise in the future from the multiple warming pathways. This estimation of possible future beyond tipping point would be useful information for decision-makers to establish new planning of defense, migration or mitigation for the future societies.

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