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      氣候變化研究進(jìn)展 ?? 2010, Vol. 6 ?? Issue (03): 164-169.

      ? 氣候系統變化 ? 上一篇    下一篇

      全球變暖背景下中國區域不同強度降水事件變化的高分辨率數值模擬

      石英,高學(xué)杰1,Fillipo Giorgi1,宋瑞艷2,吳佳2,董文杰3   

      1. 1. 中國氣象局 國家氣候中心2. 中國氣象科學(xué)研究院;中國氣象局國家氣候中心3. 北京師范大學(xué)地表過(guò)程與資源生態(tài)國家重點(diǎn)實(shí)驗室
      • 收稿日期:2009-09-30 修回日期:2009-12-04 出版日期:2010-05-30 發(fā)布日期:2010-05-30
      • 通訊作者: 高學(xué)杰

      High Resolution Simulation of Changes in Different-Intensity Precipitation Events over China Under Global Warming

      Gao Xuejie1,Song Rui-yan [中]宋瑞艷,DONG Wen-jie2   

      1. 1. National Climate Center2. State key laboratory for earth surface processes and resources ecology, Beijing Normal University
      • Received:2009-09-30 Revised:2009-12-04 Online:2010-05-30 Published:2010-05-30
      • Contact: Gao Xuejie

      摘要: 對一個(gè)20 km高水平分辨率區域氣候模式(RegCM3)所模擬的全球變暖背景下,中國區域未來(lái)不同強度降水事件變化進(jìn)行了分析。以日降水量的大小,將降水劃分為不同等級。首先檢驗了模式對當代(1961-1990年)各等級降水日數的模擬能力,結果表明,與觀(guān)測相比,模式模擬的小雨事件偏多而大雨事件在南方過(guò)少。21世紀末(2071-2100年)在IPCC SRES A2溫室氣體排放情景下,中國區域不同強度降水的變化在各地表現不同,同時(shí)其對各個(gè)地區降水總量變化的貢獻也表現出較大不同,但在大部分地區,模式給出了未來(lái)強降水事件將增加的結果。

      關(guān)鍵詞: 氣候變化, 區域氣候模式, 降水, 極端事件

      Abstract: Based on the multi-decadal climate change simulations from the RegCM3 model with a resolution of 20 km, changes in precipitation events of different intensities in 2071-2100 under the SRES A2 scenario were analyzed. The events were classified to RR1 (1-10 mm/d), RR10 (10-20 mm/d) and RR20 (≥20 mm/d) according to the daily rainfall. Verification of the model performances in simulating present (1961-1990) distribution of the rainy days was firstly carried out. The results show an overestimation of RR1 (light rain days) and a general underestimation of RR20 (heavy rain days) in southern China by the model as compared to the observations. Under the IPCC SRES A2 scenario in the end of the 21st century (2071-2100), the projection shows different changes in the RR1, RR10 and RR20 events over different areas, with a general increase in heavy rain events over most of China. The slight increase in annual mean rainfall in China is basically contributed by the increase in heavy rain events.

      Key words: climate change, regional climate model, precipitation, extreme events

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