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Hourly maximum individual wave height in the Indian shelf seas-its spatial and temporal variations in the recent 40 years

机译:印度货物海域的每小时最大个体波高 - 近40年来的空间和时间变化

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The spatial and temporal variability of the high individual wave heights, which pose a hazard in India's shelf seas, has not been investigated. In this study, the spatial and temporal variation of hourly maximum individual wave height (H_(max)) in the Indian shelf seas is examined based on 40 years ERA5 Re-Analysis data from European Centre for Medium-Range Weather Forecasts. Waverider buoy data from five locations are used to assess ERA5 H_(max). The variability of H_(max) in different temporal scales; daily, monthly and interannual and their linkages with major ocean-atmosphere coupled interaction in the Pacific and the Indian Ocean are presented. Wave climatology throughout India's western shelf seas shows average H_(max) exceeding 2 m during most of the year. Maximum H_(max) in the western shelf seas is during May-July, whereas in the southern tip and the eastern shelf seas are during the tropical cyclones and are either in October-December or May. Maximum H_(max) is 17.94 m, and it occurred at the northern Bay of Bengal on 25 May 2009 during the passage of tropical cyclone Aila. Spatial variations in H_(max) between locations spaced at 1.5° latitude are less than 10% in the northwestern and southeastern shelf seas, but large variations (~28%) are in the southwestern and northeastern shelf seas. Annual mean H_(max) shows contrasting trends when data for 1979 to 2018 and 1992 to 2018 is considered. Indian Ocean Dipole influence on the H_(max) suggests negative correlations in the western shelf seas and positive correlations in the eastern shelf seas. The correlation with climate indices is similar for both significant wave height and H_(max).
机译:尚未调查在印度货物海洋上造成危险的高个体波浪高度的空间和时间可变性。在这项研究中,根据来自欧洲中距离预测中心的40年的ERA5再分析数据,检查了印度货物海洋中小时最大单独波高(H_(MAX))的空间和时间变化。来自五个位置的Waverider浮标数据用于评估ERA5 H_(MAX)。不同时间尺度的H_(MAX)的可变性;每日,每月和际和持续的和他们的联系与主要的海洋气氛联系太平洋和印度洋的互动。在印度的西部包装海域的波浪气象学显示在今年大部分时间内超过2米的平均H_(最大值)。西部货架海域的最高H_(MAX)是7月,而在南部尖端和东部货物海域在热带旋风期间,在10月至12月或5月。最高H_(MAX)是17.94米,它于2009年5月25日在热带旋风器AILA的通过期间发生在孟加拉北部。在1.5°纬度间隔开的位置之间的空间变化(MAX)在西北部和东南保质海域间隔小于10%,但西南和东北货物海域的差异大(〜28%)。年度平均值H_(MAX)显示了1979年至2018年至2019年至2018年至2018年数据的数据趋势趋势。印度洋海洋偶极对H_(MAX)的影响表明了西部货物海域的负相关性和东部货架上的正相关。与气候指数的相关性对于显着的波浪高度和H_(MAX)类似。

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