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      氣候變化研究進(jìn)展 ?? 2007, Vol. 03 ?? Issue (06): 340-344.

      ? 研究短論 ? 上一篇    下一篇

      2050年前長(cháng)江流域極端降水預估

      張增信 Klaus Fraedrich 姜彤 張金池   

      1. 中國科學(xué)院 南京地理與湖泊研究所 中國科學(xué)院 南京地理與湖泊研究所
      • 收稿日期:2007-02-09 修回日期:2007-07-31 出版日期:2007-11-30 發(fā)布日期:2007-11-30
      • 通訊作者: 張增信

      Projection of Future Precipitation Extremes in the Yangtze River Basin for 2001-2050

        

      • Received:2007-02-09 Revised:2007-07-31 Online:2007-11-30 Published:2007-11-30

      摘要: 20世紀90年代長(cháng)江流域日最大降水增加主要出現在長(cháng)江以南地區和金沙江流域,ECHAM5/MPI-OM模型也大致模擬出了這種趨勢。在IPCC給出的3種不同的排放情景下,2000-2050年長(cháng)江上游日最大降水均有上升趨勢,2020年前A2情景下日最大降水最大,A1B最小;長(cháng)江中下游日最大降水在2025年之前均有明顯上升趨勢,之后略有下降,波動(dòng)較大。長(cháng)江流域未來(lái)日最大降水增多的區域可能主要出現在長(cháng)江以南地區,而極端降水減少的區域可能出現在長(cháng)江以北地區。

      關(guān)鍵詞: 長(cháng)江流域, 極端降水, 日最大降水, 預估

      Abstract: Daily maximum rainfall (as an index for extreme precipitation) was higher in the Jialing River basin, Taihu Lake area, the mid-lower main stream section in the 1990s, and there was a good relationship between ECHAM5/MPI-OM simulations and observed data about extreme precipitation. Under the A2, A1B, and B1 greenhouse gases emission scenarios of SRES, the extreme precipitation projected in 2000-2050 was compared, the daily maximum rainfall will be dominated by increasing trends in the upper reaches of the Yangtze River basin, with the largest magnitude of increasing tendency under the A2 scenario and the least magnitude under the A1B scenario before 2020. As for the middle and lower reaches, the daily maximum rainfall will increase prominently before 2025, and then decline slightly. There might be more floods in the south of the Yangtze River and more droughts in the north in the future.

      Key words: Yangtze River basin, extreme precipitation, daily maximum rainfall, projection

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