Spatial and temporal variations of wave height in shelf seas around India
Spatial and temporal variations of wave height in shelf seas around India
复制标题
DOI：
10.1007/s11069-015-1796-5
复制
发表时间：
2015-05
期刊：
影响因子：
3.7
通讯作者：
V. S. Kumar;T. R. Anoop
中科院分区：
文献类型：
--
作者：
V. S. Kumar;T. R. Anoop
基于欧洲中期天气预报中心制作的ERA-Interim数据集，研究了印度大陆周围陆架海波高的时空变化。研究表明，在夏季风期间，除了在印度周围大陆架海域的南部地区外，所有地区都观察到较高的波高，那里主要是冬季风。年平均有效波高在南部最高（~1.6 m）。1979-2012年，阿拉伯海东部北部和南部浪高呈微弱的显著上升趋势（最大~0.20 cm/年），中部浪高呈可忽略的负趋势。除南部地区外，孟加拉湾西部浪高呈弱下降趋势（最大~ - 0.18 cm/年）。在大部分地区，年平均风速呈微弱的下降趋势（0.1 ~ 2.5 cm/s/年）。风速和波高的冲突趋势主要是由于北印度洋的涌浪优势。
The spatial and temporal variations of wave height in shelf seas around Indian mainland are examined based on the ERA-Interim dataset produced by the European Centre for Medium-Range Weather Forecasts. The study shows that during the summer monsoon, higher wave heights are observed in all locations except at the southern locations in the shelf seas around India, where the winter monsoon is predominant. The annual average significant wave height is highest (~1.6 m) at the southern location. During 1979–2012, a weak statistically significant increasing trend (maximum ~0.20 cm/year) in wave height is observed in the northern and southern region of eastern Arabian Sea, whereas the middle region shows negligible negative trend. A weak decreasing trend (maximum ~−0.18 cm/year) in wave height is observed in the western Bay of Bengal except along the southern region. At most of the locations weak decreasing trend (0.1–2.5 cm/s/year) is observed for the annual mean wind speed. The conflicting trends in the wind speed and wave height are mainly due to the swell dominance in the North Indian Ocean.