| 中国土壤湿度的分布与变化 II. 耦合模式模拟结果评估 |
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| 引用本文： | 张文君,宇如聪,周天军.中国土壤湿度的分布与变化 II. 耦合模式模拟结果评估[J].大气科学,2008,32(5):1128-1146. |
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| 作者姓名： | 张文君 宇如聪 周天军 |
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| 作者单位： | 1.中国科学院大气物理研究所大气科学与地球流体力学数值模拟国家重点实验室, 北京 100029; 中国科学院研究生院,北京 100049 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，中国科学院知识创新工程项目 |
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| 摘 要： | 利用中国区域土壤湿度观测资料，对目前世界上较具有代表性的14个全球海-陆-气耦合模式模拟的中国区域土壤湿度进行了评估，发现尽管几乎所有的耦合模式基本都能够再现实际的土壤湿度空间分布，但模拟的土壤湿度季节循环和年际变化，却与观测相差较大。除了少数模式中降水变化与土壤湿度变化的关系不明显外，大部分模式都揭示了前期降水对后期土壤湿度变化的显著影响，在部分模式中，前期降水对土壤湿度的影响偏强。耦合模式在土壤湿度模拟上的偏差，主要来自降水模拟上的偏差。在土壤湿度的年平均和夏季平均空间分布、年际变化方面，高分辨率模式（水平格距高于1.875°×1.875°）的结果，整体上要好于中（水平格距在1.875°×1.875°与3.75°×3.75°之间）、低(水平格距小于3.75°×3.75°)分辨率的模式；而中等分辨率模式结果相对于低分辨率而言则优势不明显。
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| 关 键 词： | 土壤湿度 耦合气候模式 降水 评估 |
Spatial Distribution and Temporal Variation of Soil Moisture over China Part II: The Evaluations for Coupled Models' Simulations |
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| ZHANG Wenjun,YU Rucong and ZHOU Tianjun.Spatial Distribution and Temporal Variation of Soil Moisture over China Part II: The Evaluations for Coupled Models'''' Simulations[J].Chinese Journal of Atmospheric Sciences,2008,32(5):1128-1146. |
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| Authors: | ZHANG Wenjun YU Rucong and ZHOU Tianjun |
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| Abstract: | Soil moisture simulated with 14 representative ocean-atmosphere-land system models is evaluated over China using observational data. The results show that the observed spatial patterns of soil moisture are captured by almost all coupled models. But the seasonal cycle and the interannual variation are poorly simulated by most coupled models. The relationship between soil moisture and precipitation is well simulated by most coupled models, but the relations are too stronger in some coupled models. The poor simulations of precipitation are one of the reasons for the poor simulations of soil moisture by coupled models. The soil moisture simulated by high-resolution models (horizontal grid systems higher than 1.875°×1.875°) is generally better than those simulated by low-resolution (horizontal grid systems lower than 1.875°×1.875°) and medium-resolution (horizontal grid systems between 1.875°×1.875°and 3.75°×3.75°) models in the spatial pattern and the interannual variation of the annual and summer means. However, the superiority of medium-resolution models relative to low-resolution models is not apparent. |
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| Keywords: | soil moisture ocean-atmosphere-land system model precipitation evaluation |
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