国产综合在线观看视频,国产精品原创视频,亚洲国产熟亚洲女视频,一级风流片a级国产

       

      氣候變化研究進(jìn)展

      ? ?    

      NEX-GDDP降尺度數據對中國極端降水指數模擬能力的評估

      王倩之1, 2,劉 凱 1, 2,汪 明1, 2   

      1. 1 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,北京 100875;
         2 北京師范大學(xué)減災與應急管理研究院地理科學(xué)學(xué)部,北京 100875
      • 收稿日期:2020-11-02 修回日期:2021-03-04 出版日期:2021-08-27 發(fā)布日期:2021-08-27
      • 通訊作者: 劉凱
      • 基金資助:
        重大自然災害評估、救助與恢復重建技術(shù)研究與示范

      Evaluation of extreme precipitation indices performance based on NEX-GDDP downscaling data over China

      WANG Qian-Zhi1, 2, LIU Kai1, 2, WANG Ming1, 2   

      1. 1 State Key Laboratory of Earth Surface Processes and Resources Ecology, Beijing Normal University,Beijing 100875, China;
        2 Academy of Disaster Reduction and Emergency Management,Faculty of Geographical Science,Beijing Normal University, Beijing 100875, China
      • Received:2020-11-02 Revised:2021-03-04 Online:2021-08-27 Published:2021-08-27

      摘要: 利用1986—2005年中國地面氣象臺站觀(guān)測的格點(diǎn)化逐日降水數據(CN05.1)評估了NASA高分辨率降尺度逐日數據集NEX-GDDP中21個(gè)全球氣候模式在0.25°(約25 km×25 km)分辨率下對中國極端降水的模擬能力。選取年最大日降水量(RX1D)、年最大連續5 d降水量(RX5D)、總降水量(PRCPTOT)、濕日平均降水量(SDII)、95和99分位數累積降水量(R95p、R99p)這6個(gè)強度指數,暴雨日數(R50)、95及99分位數累積降水日數(R95T、R99T)、最大連續濕日(CWD)、最大連續干日(CDD)這5個(gè)頻率指數作為評價(jià)指數開(kāi)展評估,結果表明:(1)各模式很難捕捉到極端降水指數年際變化線(xiàn)性趨勢,表現最好的模式GFDL-ESM2G也僅有45%的指標顯示出了與觀(guān)測的正相關(guān)性,而且很弱。(2)各模式對于氣候態(tài)均值的模擬效果較好,其中,CSIRO-MK3-6-0、NorESM1-M、 MRI-CGCM3對強度指數模擬較優(yōu),inmcm4、IPSL-CM5A-MR、MIROC5對頻率指數模擬較優(yōu),綜合表現最優(yōu)的3個(gè)模式為CSIRO-MK3-6-0,inmcm4、MRI-CGCM3。(3)綜合考慮各模式對11個(gè)極端降水指數在氣候態(tài)均值和年際變化線(xiàn)性趨勢模擬能力的評估結果來(lái)看,GFDL-ESM2G、 CSIRO-MK3-6-0、 ACCESS1-0顯示了相對較高的綜合模擬能力。

      關(guān)鍵詞: NEX-GDDP, 中國, 極端降水, 模式評估

      Abstract: Taking the grid daily precipitation data (CN05.1) observed by China surface meteorological stations from 1986 to 2005 as the observation data, the performance of 21 global climate models were evaluated based on the high-resolution downscaling daily dataset NASA Earth Exchange/Global Daily Downscaled Projections (NEX-GDDP) with the resolution of 0.25° (~25 km×25 km). Six intensity indices, annual maximum daily precipitation (RX1D), the largest consecutive precipitation for five days (RX5D), total wet-day precipitation (PRCPTOT), simple daily precipitation intensity (SDII), cumulative precipitation in the 95 and 99 quantiles (R95p, R99p), and five frequency indices, heavy rain days (R50), cumulative precipitation days in the 95 and 99 quantiles (R95T, R99T), consecutive wet days (CWD), consecutive dry days (CDD), were selected for evaluation. The results show that: (1) It is difficult for models to capture the linear variation of extreme precipitation indices. Even for the best performance model, GFDL-ESM2G, only 45% of the simulated indices present the positive correlation with the observation. (2) The performance of models on the climatological means is better. CSIRO-MK3-6-0, NorESM1-M and MRI-CGCM3 have better performance on the intensity indices. Inmcm4, IPSL-CM5A-MR and MIROC5 have better performance on the frequency indices. The three best synthetical performance models are CSIRO-MK3-6-0, inmcm4 and MRI-CGCM3. (3) Considering the performance of 11 extreme precipitation indices in the climatological means and trend, GFDL-ESM2G, CSIRO-MK3-6-0 and Access1-0 have relatively higher performance.

      Key words: NEX-GDDP, China, Extreme precipitation, Models evaluation

      京ICP備11008704號-4
      版權所有 © 《氣候變化研究進(jìn)展》編輯部
      地址:北京市海淀區中關(guān)村南大街46號 郵編:100081 電話(huà)/傳真:(010)58995171 E-mail:accr@cma.gov.cn
      本系統由北京瑪格泰克科技發(fā)展有限公司設計開(kāi)發(fā) 技術(shù)支持:support@magtech.com.cn