Upper-tropospheric environment-tropical cyclone interactions over the western North Pacific: A statistical study
文献类型：期刊论文
| 作者 | Qian, Yu-Kun; Liang, Chang-Xia; Yuan, Zhuojian; Peng, Shiqiu; Wu, Junjie; Wang, Sihua |
| 刊名 | ADVANCES IN ATMOSPHERIC SCIENCES
 |
| 出版日期 | 2016 |
| 卷号 | 33期号:5页码:614-631 |
| 关键词 | Tropical cyclone-trough interaction upper troposphere eddy momentum flux convergence |
| 通讯作者 | Qian, YK (reprint author), Sun Yat Sen Univ, Dept Atmospher Sci, Ctr Monsoon & Environm Research, Guangzhou 510275, Guangdong, Peoples R China. ; Qian, YK (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China. |
| 中文摘要 | Based on 25-year (1987-2011) tropical cyclone (TC) best track data, a statistical study was carried out to investigate the basic features of upper-tropospheric TC-environment interactions over the western North Pacific. Interaction was defined as the absolute value of eddy momentum flux convergence (EFC) exceeding 10 m s(-1) d(-1). Based on this definition, it was found that 18% of all six-hourly TC samples experienced interaction. Extreme interaction cases showed that EFC can reach similar to 120 m s(-1) d(-1) during the extratropical-cyclone (EC) stage, an order of magnitude larger than reported in previous studies. Composite analysis showed that positive interactions are characterized by a double-jet flow pattern, rather than the traditional trough pattern, because it is the jets that bring in large EFC from the upper-level environment to the TC center. The role of the outflow jet is also enhanced by relatively low inertial stability, as compared to the inflow jet. Among several environmental factors, it was found that extremely large EFC is usually accompanied by high inertial stability, low SST and strong vertical wind shear (VWS). Thus, the positive effect of EFC is cancelled by their negative effects. Only those samples during the EC stage, whose intensities were less dependent on VWS and the underlying SST, could survive in extremely large EFC environments, or even re-intensify. For classical TCs (not in the EC stage), it was found that environments with a moderate EFC value generally below similar to 25 m s(-1) d(-1) are more favorable for a TC's intensification than those with extremely large EFC. |
| 学科主题 | Meteorology & Atmospheric Sciences |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/15372]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 推荐引用方式 GB/T 7714 | Qian, Yu-Kun,Liang, Chang-Xia,Yuan, Zhuojian,et al. Upper-tropospheric environment-tropical cyclone interactions over the western North Pacific: A statistical study[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2016,33(5):614-631. |
| APA | Qian, Yu-Kun,Liang, Chang-Xia,Yuan, Zhuojian,Peng, Shiqiu,Wu, Junjie,&Wang, Sihua.(2016).Upper-tropospheric environment-tropical cyclone interactions over the western North Pacific: A statistical study.ADVANCES IN ATMOSPHERIC SCIENCES,33(5),614-631. |
| MLA | Qian, Yu-Kun,et al."Upper-tropospheric environment-tropical cyclone interactions over the western North Pacific: A statistical study".ADVANCES IN ATMOSPHERIC SCIENCES 33.5(2016):614-631. |
入库方式： OAI收割
来源：南海海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。