| 区域海气耦合模式FROALS的发展及其应用 |
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| 引用本文： | 周天军,邹立维,韩振宇,刘博,姚隽琛.区域海气耦合模式FROALS的发展及其应用[J].大气科学,2016,40(1):86-101. |
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| 作者姓名： | 周天军 邹立维 韩振宇 刘博 姚隽琛 |
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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和地球流体力学数值模拟国家重点实验室, 北京 100029 |
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| 基金项目： | 国家自然科学基金项目41420104006、41205080,海洋公益性行业科研专项201105019-3 |
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| 摘 要： | 区域海气耦合模式是研究局地海气相互作用过程影响气候变率的重要平台,也是对全球气候模式进行"动力降尺度"的重要工具.本文介绍了LASG(State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics)/IAP(Institute of Atmospheric Physics)发展的区域海气耦合模式FROALS(Flexible Regional Ocean-Atmosphere-Land System model),并总结了过去五年围绕该区域海气耦合模式开展的研究工 作.FROALS的特点之一是有两个完全不同的大气模式分量和海洋模式分量选项,可以适应不同的模拟研究需 求.针对区域海气耦合模式在西北太平洋地区的模拟偏差,通过分步骤考察不同大气模式分量和不同海洋模式分量对模式模拟性能的影响,指出大气模式是导致区域海气耦合偏差的主要分量.通过改进对流触发的相对湿度阈值标准,有效地改善了此前区域海气耦合模式在亚洲季风区普遍出现的"模拟海温冷偏差".改进的FROALS对西北太平洋地区的大气和海洋环境有较好的模拟能力,合理地再现了西北太平洋地区表层洋流气候态和年际变率.较之非耦合模式,考虑区域海气耦合过程后,改进了东亚和南亚地区的降水和热带气旋潜势年际变率的模拟.最后,针对东亚—西北太平洋地区,利用FROALS对IAP/LASG全球气候模式模拟和预估的结果进行了动力降尺 度,得到了东亚区域50 km高分辨率区域气候变化信息.分析显示,FROALS模拟得到的东亚区域气候较之全球气候模式和非耦合区域气候模式结果具有明显的"增值",显示出区域海气耦合模式在该区域良好的应用前景.
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| 关 键 词： | 亚洲季风 区域海气耦合模式 模式偏差 季风的模拟和预估 |
| 收稿时间： | 2015/3/11 0:00:00 |
Development and Application of a Regional Atmosphere-Ocean Coupled Model (FROALS): A Review |
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| ZHOU Tianjun,ZOU Liwei,HAN Zhenyu,LIU Bo and YAO Junchen.Development and Application of a Regional Atmosphere-Ocean Coupled Model (FROALS): A Review[J].Chinese Journal of Atmospheric Sciences,2016,40(1):86-101. |
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| Authors: | ZHOU Tianjun ZOU Liwei HAN Zhenyu LIU Bo and YAO Junchen |
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| Institution: | 1.State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 1000292.National Climate Center, Beijing 1000813.State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;University of Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | Regional ocean-atmosphere coupled models (ROAMs) are an important tool for understanding the impacts of regional air-sea interactions on monsoon variability, as well as for the dynamical downscaling of global climate models. A review is presented on the development and application of a ROAM developed at the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, named FROALS (Flexible Regional Ocean-Atmosphere-Land System model). The major advantage of FROALS is that it consists of two atmospheric model components and two oceanic model components. By using this flexible model system, the effects of different atmospheric model components and different oceanic model components on the ROAM simulations over the western North Pacific have been investigated. Results suggest that simulated biases in FROALS are mainly contributed by the atmospheric model component. The cold biases of simulated SST in FROALS are significantly reduced when the convection suppression criterion is applied. The advanced FROALS shows reasonable performance over the western North Pacific. The climatology and interannual variability of upper-level ocean currents over the western North Pacific are reproduced well. Compared with the uncoupled simulation, the regionally coupled simulation exhibits improvements in the interannual variability of rainfall and tropical cyclone genesis potential index over the WNP. Finally, FROALS has been used to dynamically downscale the present-day climate simulation and future climate projections of the IAP/LASG global climate system model. Preliminary analysis indicates that the regional climate over East Asia derived from FROALS is better than those derived from global climate models and the uncoupled regional model, indicating that FROALS has good application prospects over this region. |
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| Keywords: | Asian monsoon Regional ocean-atmosphere coupled model Model bias Simulation and projection of Monsoon |
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