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DOI | 10.1007/s00382-017-3892-6 |
Time evolution of atmospheric parameters and their influence on sea level pressure over the head Bay of Bengal | |
Patra, Anindita1; Bhaskaran, Prasad K.1; Jose, Felix2 | |
2018-06-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:4583-4598 |
文章类型 | Article |
语种 | 英语 |
国家 | India; USA |
英文摘要 | A zonal dipole in the observed trends of wind speed and significant wave height over the Head Bay of Bengal region was recently reported in the literature attributed due to the variations in sea level pressure (SLP). The SLP in turn is governed by prevailing atmospheric conditions such as local temperature, humidity, rainfall, atmospheric pressure, wind field distribution, formation of tropical cyclones, etc. The present study attempts to investigate the inter-annual variability of atmospheric parameters and its role on the observed zonal dipole trend in sea level pressure, surface wind speed and significant wave height. It reports on the aspects related to linear trend as well as its spatial variability for several atmospheric parameters: air temperature, geopotential height, omega (vertical velocity), and zonal wind, over the head Bay of Bengal, by analyzing National Centers for Environmental Prediction (NCEP) Reanalysis 2 dataset covering a period of 38 years (1979-2016). Significant warming from sea level to 200 mb pressure level and thereafter cooling above has been noticed during all the seasons. Warming within the troposphere exhibits spatial difference between eastern and western side of the domain. This led to fall in lower tropospheric geopotential height and its east-west variability, exhibiting a zonal dipole pattern across the Head Bay. In the upper troposphere, uplift in geopotential height was found as a result of cooling in higher levels (10-100 mb). Variability in omega also substantiated the observed variations in geopotential height. The study also finds weakening in the upper level westerlies and easterlies. Interestingly, a linear trend in lower tropospheric u-wind component also reveals an east-west dipole pattern over the study region. Further, the study corroborates the reported dipole in trends of sea level pressure, wind speed and significant wave height by evaluating the influence of atmospheric variability on these parameters. |
英文关键词 | Air pressure Climate Atmosphere Ocean Sea level pressure Bay of Bengal |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432597400035 |
WOS关键词 | WIND-WAVE CLIMATE ; INDIAN-OCEAN ; OZONE DEPLETION ; TRENDS ; VARIABILITY ; REGION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36281 |
专题 | 气候变化 |
作者单位 | 1.Indian Inst Technol Kharagpur, Dept Ocean Engn & Naval Architecture, Kharagpur 721302, W Bengal, India; 2.Florida Gulf Coast Univ, Dept Marine & Ecol Sci, Ft Myers, FL 33965 USA |
推荐引用方式 GB/T 7714 | Patra, Anindita,Bhaskaran, Prasad K.,Jose, Felix. Time evolution of atmospheric parameters and their influence on sea level pressure over the head Bay of Bengal[J]. CLIMATE DYNAMICS,2018,50:4583-4598. |
APA | Patra, Anindita,Bhaskaran, Prasad K.,&Jose, Felix.(2018).Time evolution of atmospheric parameters and their influence on sea level pressure over the head Bay of Bengal.CLIMATE DYNAMICS,50,4583-4598. |
MLA | Patra, Anindita,et al."Time evolution of atmospheric parameters and their influence on sea level pressure over the head Bay of Bengal".CLIMATE DYNAMICS 50(2018):4583-4598. |
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