Evaluation of the summer precipitation over China simulated by BCC_CSM model with different horizontal resolutions during the recent half century
Evaluation of the summer precipitation over China simulated by BCC_CSM model with different horizontal resolutions during the recent half century
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不同水平分辨率BCC_CSM模式模拟中国近半个世纪夏季降水的评价
DOI：
10.1002/2015jd023131
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发表时间：
2015-05
影响因子：
4.4
通讯作者：
Wu, Haomin
中科院分区：
文献类型：
--
作者：
Zhao, Yong;Zhou, Yang;Yang, Ben;Wu, Haomin
对北京气候中心不同水平分辨率（粗分辨率BCC_CSM 1.1 m和细分辨率BCC_CSM 1.1 m）的气候系统模式对近半个世纪中国夏季降水的模拟性能进行了评价，并对模式偏差的可能物理机制进行了分析和讨论。结果表明，提高水平分辨率对中国大部分地区尤其是西部地区的夏季降水模拟效果有一定的改善，这是由于模式对地形的描述更加真实。然而，在中国东部的季风气候特征的夏季降水量（PA）被低估的更高分辨率的模式。BCC_CSM1.1 m模式对中国西部（东部）夏季PA的改善（恶化）主要是由于对中、强降水的模拟优于（差于）BCC_CSM1.1 m模式。此外，增加模式水平分辨率可以显著改善对流降水模拟，特别是在中国西部地区，但在大尺度降水模拟中表现出非常有限的改善。与BCC_CSM1.1模式相比，BCC_CSM1.1 m模式对中国东部地区夏季PA的低估程度更大，这是由于对流PA的正偏差显著减小，而大尺度PA的负偏差变化不大。进一步的机制分析表明，低估的海陆热力对比和高估的西太平洋副热带高压都导致了BCC_CSM1.1 m模式中东北向水汽输送和中国东部夏季PA明显小于BCC_CSM1.1 m模式。
The performance of Beijing Climate Center climate system model with different horizontal resolutions (BCC_CSM1.1 with coarse resolution and BCC_CSM1.1 m with fine resolution) in simulating the summer precipitation over China during the recent half century is evaluated, and the possible underlying physical mechanisms related to the model biases are also further analyzed and discussed. Results show that increasing horizontal resolution does improve the summer precipitation simulation over most part of China especially in western China due to the more realistic description of the topography. However, the summer precipitation amount (PA) over eastern China characterized by monsoonal climates is much more underestimated in the finer resolution model. It is also noted that the improvement (deterioration) of the summer PA over western (eastern) China in BCC_CSM1.1 m model is mainly due to the better (worse) simulation of the moderate and heavy precipitation relative to BCC_CSM1.1 model. In addition, increasing model horizontal resolution can significantly improve the convective precipitation simulation especially over western China but shows very limited improvement in the large‐scale precipitation simulation. The much more underestimated summer PA over eastern China in BCC_CSM1.1 m model relative to BCC_CSM1.1 model is due to the significantly reduced positive biases of the convective PA but few changes in the negative biases of the large‐scale PA. Further mechanism analysis suggests that both the underestimated land‐sea thermal contrast and the overestimated Western Pacific subtropical high result in much less northeastward water vapor transport and summer PA over eastern China in BCC_CSM1.1 m model than in BCC_CSM1.1 model.
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BCC_AGCM2.1模型对2008年初华南极端暴风雪的大范围模拟
DOI：
10.1002/jgrd.50638
发表时间：
2013-08
期刊：
J.Geophys.Res.Atmos.
影响因子：
--
作者：
黄安宁
通讯作者：
黄安宁
影响因子：
4.6
作者：
Tianjun Zhou;Z.-X. Li
通讯作者：
Tianjun Zhou;Z.-X. Li
影响因子：
5.2
作者：
Gao, XJ;Pal, JS;Giorgi, F
通讯作者：
Giorgi, F
影响因子：
8
作者：
G. Meehl;C. Covey;B. Mcavaney;M. Latif;R. Stouffer
通讯作者：
G. Meehl;C. Covey;B. Mcavaney;M. Latif;R. Stouffer
影响因子：
2.3
作者：
X. Ying;Chong Xu
通讯作者：
X. Ying;Chong Xu