Mesoscale SST perturbation-induced impacts on climatological precipitation in the Kuroshio-Oyashio extension region,as revealed by the WRF simulations
文献类型：CNKI期刊论文
| 作者 | GAO Jiaxiang; ZHANG Rong-Hua ; WANG Hongna
|
| 发表日期 | 2019-03-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | mesoscale SST perturbations and ef fects WRF model Kuroshio-Oyashio Extension climatological precipitation |
| 英文摘要 | Mesoscale coupling between perturbations of mesoscale sea surface temperature(SST) and lowlevel winds has been extensively studied using available high-resolution satellite observations. However, the climatological impacts of mesoscale SST perturbations(SST_(meso)) on the free atmosphere have not been fully understood. In this study, the rectified ef fect of SST_(meso) on local climatological precipitation in the KuroshioOyashio Extension(KOE) region is investigated using the Weather Research and Forecasting(WRF)Model; two runs are performed, one forced by low-resolution SST fields(almost no mesoscale signals) and another by additional high-resolution SST_(meso) fields extracted from satellite observations. Climatological precipitation response to SST_(meso) is characterized mainly by enhanced precipitation on the warmer flank of three oceanic SST fronts in this region. The results show that the positive correlation between the 10-m wind speed perturbations and SST_(meso) is well captured by the WRF model with a reasonable spatial pattern but relatively weak strength. The addition of SST_(meso) improves the climatological precipitation simulated by WRF with a better representation of fine-scale structures compared with satellite observations. A closer examination on the underlying mechanism suggests that while the pressure adjustment mechanism can explain the climatological precipitation enhancement along the fronts and the relatively high contribution of the convective precipitation, other factors such as synoptic events should also be taken into consideration to account for the seasonality of the precipitation response. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Key Research and Development Program of China(Nos.2017YFC1404102,2017YFC1404100) ; the National Natural Science Foundation of China(Nos.41490644,41490640) ; the Chinese Academy of Sciences Strategic Priority Project,the Western Pacific Ocean System(No.XDA11010105) ; the NSFC-Shandong Joint Fund for Marine Science Research Centers(No.U1406402) ; the Taishan Scholarship and the Recruitment Program of Global Experts |
| 卷 | v.37期:02页:13-25 |
| 语种 | 英文; |
| 分类号 | P461.2 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188615]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.UniversityofChineseAcademyofSciences 2.LaboratoryforOceanDynamicsandClimate,QingdaoNationalLaboratoryforMarineScienceandTechnology 3.CASKeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | GAO Jiaxiang,ZHANG Rong-Hua,WANG Hongna. Mesoscale SST perturbation-induced impacts on climatological precipitation in the Kuroshio-Oyashio extension region,as revealed by the WRF simulations. 2019. |
入库方式： OAI收割
来源：海洋研究所
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