| 次网格坡地辐射参数化对RegCM4.1模式模拟东亚夏季气候的影响 |
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| 引用本文： | 顾春雷,方德贤,周洋,黄安宁.次网格坡地辐射参数化对RegCM4.1模式模拟东亚夏季气候的影响[J].气象科学,2018,38(5):585-595. |
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| 作者姓名： | 顾春雷 方德贤 周洋 黄安宁 |
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| 作者单位： | 南京大学 大气科学学院, 中国气象局-南京大学气候预测研究联合实验室, 南京 210093;连云港市气象局, 江苏 连云港 222006,重庆市气象科学研究所, 重庆 401147,南京信息工程大学 大气科学学院, 南京 210044,南京大学 大气科学学院, 中国气象局-南京大学气候预测研究联合实验室, 南京 210093 |
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| 基金项目： | 国家自然科学基金（91537102）;中国科学院寒旱区陆面过程与气候变化重点实验室开放基金（LPCC201502）;中央高校基本科研业务费专项资金;江苏省气候变化协同创新中心资助资金及江苏高校"青蓝工程"项目资助 |
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| 摘 要： | 本研究将次网格坡地辐射参数化方案引入到区域气候模式(RegCM4. 1)中,并研究次网格坡地辐射参数化对RegCM4. 1模拟东亚夏季气候性能的影响。结果表明:RegCM4. 1高估了夏季青藏高原的热源作用,模拟低层偏强的西南季风导致了模拟的中国夏季降水量总体偏大。引入次网格坡地辐射参数化方案后,模式模拟的青藏高原夏季地表太阳辐射通量和长波辐射通量减小分别可达5%和12%以上,夏季减弱的青藏高原热源作用使得低层西南季风减弱,从而改善了模式对中国夏季降水的模拟;而且改善程度自东南向西北递减,在东南地区模拟夏季降水的相对均方根误差减小9%,空间相关系数和Taylor评分分别提高0. 14和0. 08。
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| 关 键 词： | RegCM4.1 次网格坡地辐射参数化 东亚气候 |
| 收稿时间： | 2017/10/17 0:00:00 |
| 修稿时间： | 2018/1/2 0:00:00 |
Effects of subgrid-scale orographic radiation parameterization on RegCM4.1's performance in simulating the climate over East Asia in summer |
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| GU Chunlei,FANG Dexian,ZHOU Yang and HUANG Anning.Effects of subgrid-scale orographic radiation parameterization on RegCM4.1's performance in simulating the climate over East Asia in summer[J].Scientia Meteorologica Sinica,2018,38(5):585-595. |
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| Authors: | GU Chunlei FANG Dexian ZHOU Yang and HUANG Anning |
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| Institution: | CMA-NJU Joint Laboratory for Climate Prediction Studies, School of Atmospheric Sciences, Nanjing University, Nanjing 210093, China;Lianyungang Meteorological Bureau, Jiangsu Lianyungang 222006, China,Chongqing Meteorological Administration, Chongqing 401147, China,Scholl of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China and CMA-NJU Joint Laboratory for Climate Prediction Studies, School of Atmospheric Sciences, Nanjing University, Nanjing 210093, China |
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| Abstract: | Regional Climate Model version 4.1 (RegCM4.1) is coupled with subgrid-scale orographic radiation parameterization scheme (SORP) and the effect of which on the performance of RegCM4.1 in simulating the climate of East Asia in summer has been systematically investigated in this study. Results have shown that RegCM4.1 overestimates the heat source of the Tibetan Plateau, the southwest monsoon and the precipitation over China in summer. Compared with those simulated by RegCM4.1 without SORP, the surface long-wave and solar radiation fluxes simulated by RegCM4.1 with SORP decline more than 12% and 5% over the Tibetan Plateau, the decreased surface long-wave and solar radiation fluxes simulated by RegCM4.1 with SORP lead to the weakened heat source of the Tibetan Plateau and southwest monsoon and thereafter the improvement of the precipitation simulation in summer. The improvement of the precipitation simulation in summer declines from southeastern China to northwestern China. Over the southeastern China, the spacial correlation coefficient and Taylor skill score of the simulated summer precipitation increase 0.14 and 0.08, the relative root mean square error decreases about 9%. |
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| Keywords: | RegCM4 1 Subgrid-scale orographic radiation parameterization East Asian climate |
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