气候变化领域集成服务门户(CCPortal): Regional wise characteristic study of significant wave height for the Indian Ocean

CCPortal

DOI	10.1007/s00382-020-05186-6
	Regional wise characteristic study of significant wave height for the Indian Ocean
	Sreelakshmi S.; Bhaskaran P.K.
发表日期	2020
ISSN	0930-7575
起始页码	3405
结束页码	3423
卷号	54
英文摘要	A proper knowledge and understanding of wind-wave characteristics and its variability on basin, regional and local scales have profound importance and practical applications in marine related activities, ocean engineering, and coastal zone management. The present study deals with the comparison of synoptic annual trends derived from space borne measurements (1992–2016), ERA-5 (1992–2018), and NCEP WWIII global run (1997–2018), monthly and seasonal wave climatology, characteristics of the annual cycle in regional basins and monthly trends of wind-wave climate on a pentad scale. Evaluation of wind-wave characteristics was performed for sub-divided domains of the IO. Further, the wave heights were segregated into percentile ranks (from 99th to 10th) by which a detailed analysis was carried out at the regional scale. Analysis of monthly and seasonal climatology signifies that the highest wave activity is observed in the extra tropical South Indian Ocean (ETSI) and the least in the Bay of Bengal. Higher percentile waves (99th, 95th, and 90th) in the ETSI are observed to be active for more than 6 months in a year. In the Arabian Sea, the maximum occurrence of 99th percentile waves (about 65%) is prominent during the month of July. An apparent pentad variation has been identified in the ETSI from 1997 to 2016 whereas, decadal variability in the north Indian Ocean (NIO) and Tropical South Indian Ocean for the lower percentile significant wave heights (25th and 10th percentiles). During the period 2007–2011, the IO experienced a considerable decreasing wave activity in all the sectors. The observed trends in annual maximum significant wave height for the ETSI and the annual mean significant wave height for the NIO are found increasing at a rate of 3.3 cm/year and 0.27 cm/year, respectively. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Indian Ocean; Pentad-scale variability; Satellite-altimetry; Significant wave height
语种	英语
scopus关键词	annual cycle; climatology; decadal variation; significant wave height; wind-wave interaction; Arabian Sea; Bay of Bengal; Indian Ocean; Indian Ocean (South)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145522
作者单位	Department of Ocean Engineering and Naval Architecture, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721 302, India
推荐引用方式 GB/T 7714	Sreelakshmi S.,Bhaskaran P.K.. Regional wise characteristic study of significant wave height for the Indian Ocean[J],2020,54.
APA	Sreelakshmi S.,&Bhaskaran P.K..(2020).Regional wise characteristic study of significant wave height for the Indian Ocean.Climate Dynamics,54.
MLA	Sreelakshmi S.,et al."Regional wise characteristic study of significant wave height for the Indian Ocean".Climate Dynamics 54(2020).