The Importance of Lateral Boundaries, Surface Forcing and Choice of Domain Size for Dynamical Downscaling of Global Climate Simulations
The Importance of Lateral Boundaries, Surface Forcing and Choice of Domain Size for Dynamical Downscaling of Global Climate Simulations
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横向边界、地表强迫和域大小选择对于全球气候模拟动态缩小的重要性
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
J. Haugen
中科院分区：
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作者：
M. Køltzow;T. Iversen;J. Haugen
大气区域气候模式（RCMs）被迫与低分辨率数据的动态降尺度应产生气候细节，并增加低分辨率数据的质量和价值。本研究的目的是探讨的重要性（一）海洋表面强迫（海表温度（SST）和海冰），（二）的横向边界条件的数据，和（三）的集成域的大小，在动态降尺度数据的质量和价值的提高。针对这三个方面进行了实验，并对平均海平面气压（MSLP），2米空气温度（T2 m）和日降水量的结果进行了研究。虽然SST的变化在当地给出了明确的反应，在横向边界数据和整合域的大小的变化变得更重要，我们的地理范围是挪威。的T2 M原来不太敏感的横向强迫和积分域的大小比MSLP和降水的变化。挪威各地区对所有三个变量的敏感性各不相同;挪威北方地区最为敏感。即使在这项研究中发现的敏感性可能是不同的，在其他地区和其他区域协调机制，这些结果需要仔细考虑时，选择集成域和驱动横向边界数据时，执行动态降尺度。
Dynamical downscaling by atmospheric Regional Climate Models (RCMs) forced with low-resolution data should produce climate details and add quality and value to the low-resolution data. The aim of this study was to explore the importance of (i) the oceanic surface forcing (sea-surface temperature (SST) and sea-ice), (ii) the lateral boundary condition data, and (iii) the size of the integration domain with respect to improved quality and value in dynamically downscaled data. Experiments addressing the three aspects were performed and the results were investigated for mean sea level pressure (mslp), 2 m air temperature (T2m) and daily precipitation. Although changes in SST gave a clear response locally, changes in the lateral boundary data and the size of the integration domain turned out to be more important with our geographical scope being Norway. The T2m turned out less sensitive to the changes in lateral forcing and the size of the integration domain than mslp and precipitation. The sensitivity for all three variables differed between Norwegian regions; northern parts of Norway were the most sensitive. Even though the sensitivities found in this study might be different in other regions and for other RCMs, these results call for careful consideration when choosing integration domain and driving lateral boundary data when performing dynamical downscaling.