Abstract In this study, the effect of severe tropical cyclone Ockhi on the physical and biological changes in ocean properties has been investigated. Winds from SCATSAT-1 was used for estimating the cyclone induced Ekman pumping. The role of ocean stratification, cyclonic wind stress, eddies and cyclone translation speed on the post cyclone oceanic response has been investigated. 8-day composite data of winds, sea surface temperature (SST), chlorophyll and sea level anomaly (SLA) have been analyzed for pre-cyclone, during cyclone and after cyclone period to understand the effect of wind forcing on the ocean variables. It was observed that there was a significant phytoplankton bloom like concentration along with 2-3 °C drop in SST after the passage of Ockhi. Thermocline displacements of up to 56 m were observed along the cyclone track. SLA data analyzed for the period shows formation of a cyclonic cold core eddy and weakening of anticyclonic warm core eddies. The entire cyclone track was divided into 12 track points based on the 12 hourly position and the change in SST and chlorophyll analyzed. The maximum change in chlorophyll and SST was observed where the cyclone was slowest and mixed layer shallow.

中文翻译：

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气旋奥基在阿拉伯海引起上升流和生物生产力的相关变化

摘要 在这项研究中，研究了强热带气旋奥基对海洋特性的物理和生物变化的影响。来自 SCATSAT-1 的风用于估计气旋引起的 Ekman 抽水。已经研究了海洋分层、气旋风应力、涡流和气旋平移速度对气旋后海洋响应的作用。分析了气旋前、气旋期间和气旋后的 8 天风、海面温度 (SST)、叶绿素和海平面异常 (SLA) 的综合数据，以了解风力对海洋变量的影响。据观察，在 Ockhi 通过后，随着 SST 下降 2-3 °C，出现了显着的浮游植物水华样浓度。沿着气旋轨道观察到高达 56 m 的温跃层位移。该时期分析的 SLA 数据显示气旋冷核涡旋的形成和反气旋暖核涡旋的减弱。根据 12 小时位置和分析 SST 和叶绿素的变化，将整个气旋轨迹划分为 12 个轨迹点。在气旋最慢且混合层较浅的地方观察到叶绿素和 SST 的最大变化。