DOI: 10.1007/s00382-016-3385-z
Scopus记录号: 2-s2.0-84990930979
论文题名: Temporal variability in wind–wave climate and its validation with ESSO-NIOT wave atlas for the head Bay of Bengal
作者: Patra A. ; Bhaskaran P.K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 49, 期: 4 起始页码: 1271
结束页码: 1288
语种: 英语
英文关键词: Bay of Bengal
; ERA-20C
; ERA-Interim
; Satellite altimeter
; Wave atlas
; Wave rider buoy
; Wind–wave climate
; WW3
英文摘要: The head Bay region bordering the northern Bay of Bengal is a densely populated area with a complex geomorphologic setting, and highly vulnerable to extreme water levels along with other factors like sea level rise and impact of tropical cyclones. The influence of climate change on wind–wave regime from this region of Bay of Bengal is not known well and that requires special attention, and there is a need to perform its long-term assessment for societal benefits. This study provides a comprehensive analysis on the temporal variability in domain averaged wind speed, significant wave height (SWH) utilizing satellite altimeter data (1992–2012) and mean wave period using ECMWF reanalysis products ERA-Interim (1992–2012) and ERA-20C (1992–2010) over this region. The SWH derived from WAVEWATCH III (WW3) model along with the ERA-Interim reanalysis supplements the observed variability in satellite altimeter observations. Further, the study performs an extensive error estimation of SWH and mean wave period with ESSO-NIOT wave atlas that shows a high degree of under-estimation in the wave atlas mean wave period. Annual mean and wind speed maxima from altimeter show an increasing trend, and to a lesser extent in the SWH. Interestingly, the estimated trend is higher for maxima compared to the mean conditions. Analysis of decadal variability exhibits an increased frequency of higher waves in the present decade compared to the past. Linear trend analysis show significant upswing in spatially averaged ERA-20C mean wave period, whereas the noticed variations are marginal in the ERA-Interim data. A separate trend analysis for the wind-seas, swell wave heights and period from ERA-20C decipher the fact that distant swells governs the local wind–wave climatology over the head Bay region, and over time the swell activity have increased in this region. © 2016, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53120
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Ocean Engineering and Naval Architecture, Indian Institute of Technology Kharagpur, Kharagpur, India
Recommended Citation:
Patra A.,Bhaskaran P.K.. Temporal variability in wind–wave climate and its validation with ESSO-NIOT wave atlas for the head Bay of Bengal[J]. Climate Dynamics,2017-01-01,49(4)