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Imprints of Tropical Cyclones on Structural Characteristics of Mesoscale Oceanic Eddies Over the Western North Pacific
Geophysical Research Letters ( IF 5.2 ) Pub Date : 2021-05-04 , DOI: 10.1029/2021gl092601
Zhanhong Ma 1 , Zheliang Zhang 1 , Jianfang Fei 1 , Huizan Wang 1
Affiliation  

The imprints of tropical cyclones (TCs) on structural characteristics of mesoscale oceanic eddies over the western North Pacific are investigated. Results reveal a statistically significant role of TCs in modulating the structural characteristics of both cold-core eddies (CCEs) and warm-core eddies (WCEs). The eddy strength in terms of amplitude and circulation speed is intensified for CCEs while is weakened for WCEs after the passage of TCs. The size of WCEs is decreased by TCs, while the CCE is enlarged shortly and then decreased subsequently. The TC-induced decrease in mixed-layer depth is larger in WCEs, causing comparable mixed-layer depths between CCEs and WCEs. The strength changes of CCEs depend highly on the intensity and translation speed of TCs. The lifetimes of both CCEs and WCEs are significantly prolonged by TC forcing. The air-sea energy exchange is modulated by both CCEs and WCEs via changing the response of sea surface temperature.

中文翻译:

热带气旋对北太平洋西部中尺度海洋涡旋结构特征的印记

研究了热带气旋对北太平洋西部中尺度海洋涡旋结构特征的影响。结果显示,TC在调节冷芯涡流(CCE)和暖芯涡流(WCE)的结构特征方面具有统计学意义。TCs通过后,CCEs的振幅和循环速度方面的涡流强度增强,而WCEs的涡流强度减弱。TC减少了WCE的大小,而CCE不久又扩大了,然后又减小了。TC引起的WCE中混合层深度的减小更大,从而导致CCE和WCE之间具有可比的混合层深度。CCE的强度变化在很大程度上取决于TC的强度和翻译速度。TC强制显着延长了CCE和WCE的寿命。
更新日期:2021-05-22
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