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      氣候變化研究進(jìn)展 ?? 2010, Vol. 6 ?? Issue (03): 170-174.

      ? 氣候系統變化 ? 上一篇    下一篇

      瀾滄江流域1951-2008年氣候變化和2010-2099年不同情景下模式預估結果分析

      劉波,肖子牛   

      1. 國家氣候中心
      • 收稿日期:2009-09-14 修回日期:2009-11-30 出版日期:2010-05-30 發(fā)布日期:2010-05-30
      • 通訊作者: 肖子牛

      Observed (1951-2008) and Projected (2010-2099) Climate Change in the Lancang River Basin

      • Received:2009-09-14 Revised:2009-11-30 Online:2010-05-30 Published:2010-05-30

      摘要: 利用瀾滄江流域1951-2008年的降水和氣溫觀(guān)測資料以及多模式集成的21世紀(2010-2099年)不同情景下(SRES A1B、SRES A2和SRES B1)氣候變化模擬試驗的預估結果,分析了該流域過(guò)去58年降水和氣溫的變化,并預估了未來(lái)90年的氣候變化趨勢。結果表明,在全球增暖的大背景下,過(guò)去58年瀾滄江流域的年降水量下降了46.4 mm,氣溫有所上升,升溫率達到了0.15℃/10a。在未來(lái)的90年,無(wú)論在哪種排放情景下,降水都表現為明顯的上升趨勢,而且相對于過(guò)去58年的結果,3種不同情景下降水的年代際變率都有所增加,其中A2情景值最大,B1情景值最小。年平均氣溫無(wú)論是在過(guò)去的58年還是在未來(lái)的90年都以明顯的上升趨勢為主,3種情景下氣溫的升溫率遠遠超過(guò)過(guò)去58的結果。

      關(guān)鍵詞: 瀾滄江流域, 氣候變化, 預估, 氣溫

      Abstract: Based on the temperature and precipitation observation data from 1951 to 2008 and the projected data from 2010 to 2099 by the multi-model ensemble under the SRES A1B, A2 and B1 scenarios in the 21st century, we analyzed the annual and seasonal changes of precipitation and temperature in the past 58 years, and estimated the climatic tendencies in the next 90 years. The results show that the annual precipitation decreased by 46.4 mm in the past 58 years, which wasn't statistically significant. The precipitation under each scenario has an obvious increasing tendency in the next 90 years. The increasing rates of precipitations under SRES A1B, A2 and B1 are all larger than that in the past 58 years. We also find whether in the past 58 years and in the next 90 years under each scenario, annual mean temperature is increasing and it is statistically significant.

      Key words: Lancang River basin, climate change, projection, air temperature, precipitation

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