| 2015年台风“彩虹”过境后下山冷急流引起的南海北部海域异常海面降温 |
| |
| 引用本文： | 石雨鑫,谢玲玲,郑全安,张书文,李明明,李君益.2015年台风“彩虹”过境后下山冷急流引起的南海北部海域异常海面降温[J].海洋学报(英文版),2019,38(5):62-75. |
| |
| 作者姓名： | 石雨鑫 谢玲玲 郑全安 张书文 李明明 李君益 |
| |
| 作者单位： | 广东省近海海洋变化与灾害预警重点实验室(广东海洋大学), 湛江, 524088,广东省近海海洋变化与灾害预警重点实验室(广东海洋大学), 湛江, 524088,广东省近海海洋变化与灾害预警重点实验室(广东海洋大学), 湛江, 524088;美国马里兰大学大气与海洋科学系, 马里兰科利奇帕克, 美国, 20742,广东省近海海洋变化与灾害预警重点实验室(广东海洋大学), 湛江, 524088,广东省近海海洋变化与灾害预警重点实验室(广东海洋大学), 湛江, 524088,广东省近海海洋变化与灾害预警重点实验室(广东海洋大学), 湛江, 524088 |
| |
| 基金项目： | Foundation item:The National Natural Science Foundation of China under contract Nos 41776034, 41476009 and 41706025; the GASI Project under contract Nos GASI-IPOVAI-01-02 and GASI-02-SCS-YGST2-02; the Natural Key Research and Development Program of China under contract No 2016YFC1401403; the Foundation of Guangdong Province for Outstanding Young Teachers in University under contract No. YQ201588. |
| |
| 摘 要： | This study deals with a unusual cooling event after Typhoon Mujigea passed over the northern South China Sea(SCS) in October 2015. We analyze the satellite sea surface temperature(SST) time series from October 3 to 18,2015 and find that the cooling process in the coastal ocean had two different stages. The first stage occurred immediately after typhoon passage on October 3, and reached a maximum SST drop of –2℃ on October 7 as the usual cold wake after typhoon. The second stage or the unusual extended cooling event occurred after 7d of the typhoon passage, and lasted for 5d from October 10 to 15. The maximum SST cooling was –4℃ and occurred after 12d of typhoon passage. The mechanism analysis results indicate that after landing and moving northwestward to the Yunnan-Guizhou Plateau(YGP), Typhoon Mujigea(2015) met the westerly wind front on October 5. The lowpressure and positive-vorticity disturbances to the front triggered meridional air flow and low-pressure trough,thus induced a katabatic cold jet downward from the Qinghai-Tibet Plateau(QTP) passing through the YGP to the northwestern SCS. The second cooling reached the maximum SST drop 4d later after the maximum air temperature drop of –9℃ on October 11. The simultaneous air temperature and SST observations at three coastal stations reveal that it is this katabatic cold jet intrusion to lead the unusual SST cooling event.
|
| 关 键 词： | 台风“彩虹” 二次降温 下山冷急流 南海 西风带 |
| 收稿时间： | 2018/3/16 0:00:00 |
Unusual coastal ocean cooling in the northern South China Sea by a katabatic cold jet associated with Typhoon Mujigea (2015) |
| |
| SHI Yuxin,XIE Lingling,ZHENG Quanan,ZHANG Shuwen,LI Mingming and LI Junyi.Unusual coastal ocean cooling in the northern South China Sea by a katabatic cold jet associated with Typhoon Mujigea (2015)[J].Acta Oceanologica Sinica,2019,38(5):62-75. |
| |
| Authors: | SHI Yuxin XIE Lingling ZHENG Quanan ZHANG Shuwen LI Mingming and LI Junyi |
| |
| Institution: | 1.Guangdong Key Laboratory of Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang 524088, China2.Guangdong Key Laboratory of Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang 524088, China;Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland 20742, USA |
| |
| Abstract: | This study deals with a unusual cooling event after Typhoon Mujigea passed over the northern South China Sea (SCS) in October 2015. We analyze the satellite sea surface temperature (SST) time series from October 3 to 18, 2015 and find that the cooling process in the coastal ocean had two different stages. The first stage occurred immediately after typhoon passage on October 3, and reached a maximum SST drop of -2℃ on October 7 as the usual cold wake after typhoon. The second stage or the unusual extended cooling event occurred after 7 d of the typhoon passage, and lasted for 5 d from October 10 to 15. The maximum SST cooling was -4℃ and occurred after 12 d of typhoon passage. The mechanism analysis results indicate that after landing and moving northwestward to the Yunnan-Guizhou Plateau (YGP), Typhoon Mujigea (2015) met the westerly wind front on October 5. The low-pressure and positive-vorticity disturbances to the front triggered meridional air flow and low-pressure trough, thus induced a katabatic cold jet downward from the Qinghai-Tibet Plateau (QTP) passing through the YGP to the northwestern SCS. The second cooling reached the maximum SST drop 4 d later after the maximum air temperature drop of -9℃ on October 11. The simultaneous air temperature and SST observations at three coastal stations reveal that it is this katabatic cold jet intrusion to lead the unusual SST cooling event. |
| |
| Keywords: | Typhoon Mujigea (2015) second-round cooling katabatic cold jet South China Sea westerly wind front |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
|
