| 海洋环流模式对平流方案与分辨率的敏感性 |
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| 引用本文： | 肖潺,俞永强,吴方华,刘海龙.海洋环流模式对平流方案与分辨率的敏感性[J].气象学报,2008,66(3):329-341. |
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| 作者姓名： | 肖潺 俞永强 吴方华 刘海龙 |
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| 作者单位： | 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(LASG), 北京, 100029;中国气象局国家气候中心, 北京, 100081;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(LASG), 北京, 100029;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(LASG), 北京, 100029;中国气象局国家气候中心, 北京, 100081;中国气象局国家气候中心, 北京, 100081 |
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| 基金项目： | 国家自然科学基金，科技部重点基础研究计划，中国科学院知识创新工程项目 |
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| 摘 要： | 文中将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(LASG)发展的准全球海洋环流模式(LICOM),从水平分辨率、垂直分辨率、平流方案3个方面分别采用不同的方案,进行组合试验,研究这些因素对于海洋环流(特别是热带海洋)的重要影响.8组试验表明,水平分辨率的提高,对于流场的改进有显著作用,能够使流场达到与实际非常接近的强度;调整的垂直分辨率,上层海洋的加密,能够使热带太平洋上层海洋的模拟改进;引入的两步保形平流方案,能够使得热带太平洋海温的模拟有所改进,这种改进的效果在低分辨率的情况下,尤为明显.同时,8组试验也一致地表现出等温线的密集程度比实际情况稀疏,这反映了模式在物理过程,特别是混合过程的描述方面,还有值得改进的地方.
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| 关 键 词： | 水平分辨率 垂直分辨率 两步保形平流方案 热带太平洋冷舌 |
| 收稿时间： | 2007/7/12 0:00:00 |
| 修稿时间： | 2007/12/29 0:00:00 |
An oceanic general circulation model's sensitivity to advection schemes and spatial resolution. |
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| REN Suling,LIU Yimin and WU Guoxiong.An oceanic general circulation model's sensitivity to advection schemes and spatial resolution.[J].Acta Meteorologica Sinica,2008,66(3):329-341. |
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| Authors: | REN Suling LIU Yimin and WU Guoxiong |
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| Institution: | National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081;State Key Lab of Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of;State Key Lab of Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of |
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| Abstract: | Three kinds of typhoons with distinct tracks are sorted based on a set of typhoon data from 1958 to 1998. The results of composite analyses con rm that different typhoon tracks correspond to different patterns of the subtropical anticyclone over the western Pacific (SAWP). When the tracks are westward, the SAWP is strong, with a zonal form, and stretches westward; when the tracks are recurving, the main body of the SAWP shifts eastward and breaks near 160°E; and when the tracks are northward, the SAWP is located far east of its normal position. Based on the above result, two different initial fields are con gured, one has a zonal and strong SAWP, and the other has a meridional and weak SAWP. By using the GOALS R42L9 climate model, a temperature disturbance is added into these two different initial fields to force the formation of a typhoon. Westward and northward tracked typhoons are well simulated, thus verifying that different patterns of the SAWP have different effects on typhoon tracks. Results also show that typhoons can induce barotropic Rossby waves propagating to the mid and high latitudes. Under different background zonal flows, the wave trains triggered by the typhoons of westward and northward tracks are also different, and their effects on the mid and high latitude circulations and the SAWP are different. Compared to a northward tracked typhoon, a westward tracked typhoon is able to induce positive geopotential height anomaly to its north and northwest, resulting in the SAWP strengthening and developing westward. |
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| Keywords: | Horizontal resolution Vertical resolution Two step Shape Preserving Advection Scheme(TSPAS) Cold tongue in the tropical Pacific Ocean |
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