| Sun Jia,Wang Guihua,Xiong Xuejun,Hui Zhenli,Hu Xiaomin,Ling Zheng,Yu Long,Yang Guangbing,Guo Yanliang,Ju Xia,Chen Liang. 2020. Impact of warm mesoscale eddy on tropical cyclone intensity. Acta Oceanologica Sinica, 39(8):1－13 |
| Impact of warm mesoscale eddy on tropical cyclone intensity |
| 中尺度暖涡对热带气旋强度变化的影响及作用机制 |
| Received:December 25, 2019 |
| DOI：10.1007/s13131-020-1617-x |
| Key words:tropical cyclone intensity warm ocean mesoscale eddy upper ocean spatial-temporal pattern |
| 中文关键词: 热带气旋强度 中尺度暖涡 上层海洋 时空特征 |
| 基金项目:The National Natural Science Foundation of China under contract No. 41706034; the Basic Scientific Fund for National Public Research Institutes of China under contract No. 2020Q05; the Open Fund of the Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences under contract Nos KLOCW1803 and KLOCW1804; the Open Fund of the Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology under contract No. 2019A02; the National Natural Science Foundation of China under contract Nos 91428206 and 41376038; the National Science and Technology Major Project under contract No. 2016ZX05057015; the National Programme on Global Change and Air-Sea Interaction under contract Nos GASI-03-01-01-02 and GASI-IPOVAI-01-05; the NSFC-Shandong Joint Fund for Marine Science Research Centers under contract No. U1606405. |
| Author Name | Affiliation | E-mail | | Sun Jia | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Wang Guihua | Institute of Atmospheric Sciences, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China | wghocean@yahoo.com | | Xiong Xuejun | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Hui Zhenli | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Hu Xiaomin | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Ling Zheng | Guangdong Key Laboratory of Coastal Ocean Variability and Disaster Prediction, Guangdong Ocean University, Zhanjiang 524088, China | | | Yu Long | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Yang Guangbing | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Guo Yanliang | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Ju Xia | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Chen Liang | First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| The spatial-temporal patterns of tropical cyclone (TC) intensity changes caused by the warm ocean mesoscale eddy (WOME) distribution are evaluated using two sets of idealized numerical experiments. The results show that the TC was intensified and weakened when a WOME was close to and far away from the TC center, respectively. The area where the WOME enhanced (weakened) TC intensity is called the inner (outer) area in this study. Amplitudes of the enhancement and weakening caused by the WOME in the inner and outer area decreased and increased over time, while the ranges of the inner and outer area diminished and expanded, respectively. The WOME in the inner area strengthened the secondary circulation of the TC, increased heat fluxes, strengthened the symmetry, and weakened the outer spiral rainband, which enhanced TC intensity. The effect was opposite if the WOME was in the outer area, and it weakened the TC intensity. The idealized simulation employed a stationary TC, and thus the results may only be applied to TCs with slow propagation. These findings can improve our understanding of the interactions between TC and the WOME and are helpful for improving TC intensity forecasting by considering the effect of the WOME in the outer areas. |
| 中文摘要: |
| 基于两组理想化数值试验，对比研究了分布于热带气旋不同位置处的海洋中尺度暖涡所引发的热带气旋强度变化的时空特征。研究发现，热带气旋中心附近的暖涡对热带气旋强度有增强作用，而位于热带气旋外围的暖涡则会抑制热带气旋的发展。本研究将暖涡增强（减弱）热带气旋强度的区域称为内（外）区。随着时间的推移，内（外）区暖涡对热带气旋强度的增强（减弱）幅度逐渐减小（增大），区域范围同步减小（增大）。内区暖涡增强了热带气旋的次级环流和结构对称性、增加了海气界面热通量，同时减弱了外围螺旋雨带，进而导致热带气旋强度增强；若暖涡在外区，其对热带气旋的作用相反，导致热带气旋强度减弱。由于理想化试验中热带气旋静止不动，因此研究结果可能只适用于传播速度较慢的热带气旋。本研究结果有助于更好地理解热带气旋和海洋中尺度暖涡之间的相互作用，并通过引入热带气旋外区暖涡的影响助力提高热带气旋强度预报工作。 |
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