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基于MIROC/WRF嵌套模式的中国气候降尺度模拟
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国家自然科学基金项目41130103;南京信息工程大学科研启动基金项目2012X035


Dynamical Downscaling Simulation over China Using the Nested MIROC/WRF Model
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    摘要:

    开展了基于嵌套的全球模式MIROC和区域气候模式WRF的动力降尺度模拟试验,检验该模式对中国气候的模拟性能,得到以下结论:全球气候模式MIROC和WRF都能较好地模拟出中国年平均地表气温(下文简称气温)分布。WRF模式对气温场的描述更为细致,模拟出了四川盆地高温和中国最北方区域的低温。两个模式总体上对南方降水模拟好于北方地区,东部地区好于西部地区。MIROC模式模拟的年平均和各季节降水与观测的 空间相关系数在0.79~0.83之间,表明它对降水的模拟较好。WRF模式模拟的降水空间分布好于MIROC模式。MIROC模式在青藏高原东南侧存在虚假降水中心,WRF能有效改进该地区降水的模拟。两个模式对年平均气温和降水年际变率的模拟能力均较差,WRF模式相对MIROC模式有一定改进。

    Abstract:

    A dynamic downscaling simulation experiment based on the WRF (Weather Research and Forecasting) model was conducted to examine the performance of the model in simulating the climate in China. The following results were found. MIROC (Model for Interdisciplinary Research on Climate) and the WRF model can reproduce the observed spatial patterns of surface air temperature well. The WRF model provides more detailed descriptions of the temperature, with both high temperatures in the Sichuan Basin and low temperatures in North China simulated well. The annual and seasonal spatial correlation coefficient between the MIROC simulated and observed precipitation ranges from 0.79 to 0.83, indicating that MIROC can simulate precipitation well. Overall, the WRF model can reproduce the observed precipitation distribution more accurately than the MIROC. Both the MIROC and the WRF models simulate precipitation better in South and East China than in North and West China. The WRF model can remove the artificial precipitation center over the eastern edge of the Tibetan Plateau simulated by the MIROC. Both models do a poor job of simulating the interannual variations in annual mean temperature and total precipitation, although the WRF model performs better.

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王树舟,于恩涛.2013.基于MIROC/WRF嵌套模式的中国气候降尺度模拟[J].气候与环境研究,18(6):681-692. WANG Shuzhou, YU Entao.2013. Dynamical Downscaling Simulation over China Using the Nested MIROC/WRF Model[J]. Climatic and Environmental Research (in Chinese],18(6):681-692.

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  • 收稿日期:2012-04-17
  • 最后修改日期:2012-08-09
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  • 在线发布日期: 2013-11-20
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