Impact of Major Typhoons in 2016 on Sea Surface Features in the Northwestern Pacific
Impact of Major Typhoons in 2016 on Sea Surface Features in the Northwestern Pacific
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2016年主要台风对西北太平洋海面特征的影响
DOI：
10.3390/w10101326
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发表时间：
2018-09
期刊：
影响因子：
3.4
通讯作者：
Xiang Lulu
中科院分区：
文献类型：
--
作者：
Song Dan;Guo Linghui;Duan Zhigang;Xiang Lulu
研究海洋上层与台风之间的相互作用对于提高我们对海洋与大气之间热量和动量交换的理解至关重要。近年来，上层海洋对台风的响应受到了广泛的关注。海洋表面冷却（SSC）过程已被反复讨论。本文对2016年发生的五个强台风和超强台风--LionRock、Meranti、Malakas、Megi和Chaba--进行了案例研究，以寻找SSC的更多证据和台风对海面特征影响的新特征。利用中央气象台的监测资料、卫星微波、红外遥感的海表温度（SST）资料和卫星高度计的海平面距平（SLA）资料，分析了台风对SST的影响、SSC与前期涡的关系、台风前后冷暖涡的分布、以及涡旋与台风强度的关系。结果表明：（1）SSC一般发生在台风过境期间，其程度取决于台风的强度、移动速度和预先存在的海面条件。相对较低的海平面（或冷心涡）有利于产生强烈的SSC;（2）台风过后，SLA随SSC的降低而沿着明显降低。台风过境期间，原有的正SLA或暖涡减少或消失，而负SLA或冷涡增强。（3）提出了一种基于局地惯性周期与台风风强迫作用时间之比的判据，用于动态区分慢速和快速移动的台风。在LionRock的情况下，在其转折点处发现了亚临界（缓慢移动）的情况，其中冷芯涡流是由长时间强迫产生的。此外，狮子岩发展成为超级台风，因为它在温暖的海面上失速时减少了负反馈。因此，LionRock的独特案例值得进一步探讨。
Studying the interaction between the upper ocean and the typhoons is crucial to improve our understanding of heat and momentum exchange between the ocean and the atmosphere. In recent years, the upper ocean responses to typhoons have received considerable attention. The sea surface cooling (SSC) process has been repeatedly discussed. In the present work, case studies were examined on five strong and super typhoons that occurred in 2016-LionRock, Meranti, Malakas, Megi, and Chaba-to search for more evidence of SSC and new features of typhoons' impact on sea surface features. Monitoring data from the Central Meteorological Observatory, China, sea surface temperature (SST) data from satellite microwave and infrared remote sensing, and sea level anomaly (SLA) data from satellite altimeters were used to analyze the impact of typhoons on SST, the relationship between SSC and pre-existing eddies, the distribution of cold and warm eddies before and after typhoons, as well as the relationship between eddies and the intensity of typhoons. Results showed that: (1) SSC generally occurred during a typhoon passage and the degree of SSC was determined by the strength and the translation speed of the typhoon, as well as the pre-existing sea surface conditions. Relatively lower sea level (or cold core eddy) favors causing intense SSC; (2) After a typhoon passed, the SLA obviously decreased along with the SSC. The pre-existing positive SLAs or warm eddies decreased or disappeared during the typhoon's passage, whereas negative SLAs or cold eddies were enhanced. It is suggested that the presence of warm eddies on the path has intensified the typhoons; (3) A criterion based on the ratio of local inertial period to application time of the typhoon wind-forcing was raised to dynamically distinguish slow-and fast-moving typhoons. And subcritical (slow-moving) situations were found in the LionRock case at its turning points where a cold core eddy was generated by long-time forcing. Moreover, the LionRock developed into a super typhoon due to reduced negative feedback when it was stalling over a comparably warmer sea surface. Therefore, the distinctive LionRock case is worthy of further discussion.
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上层海洋对两次连续台风袭来的反应
DOI：
10.1016/j.dsr.2017.12.006
发表时间：
2018-02
期刊：
Deep Sea Research Part I: Oceanographic Research Papers
影响因子：
--
作者：
Renhao Wu;Chunyan Li
通讯作者：
Chunyan Li
影响因子：
2.3
作者：
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影响因子：
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Wu, Chun-Chieh
影响因子：
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作者：
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N. Walker;R. Leben;Shreekanth Balasubramanian
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