阿拉伯湾海面洋流气候学概览,特别关注卡塔尔专属经济区

IF 3.5 3区 地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES
Afnan Abdirashid Mussa, Valliyil Mohammed Aboobacker, Cheriyeri Poyil Abdulla, Varis Mohammed Hasna, Ebrahim M. A. S. Al-Ansari, Ponnumony Vethamony
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引用次数: 0

摘要

本研究利用哥白尼海洋服务(CMEMS)获得的 1993-2019 年阿拉伯湾海流速度,推导出阿拉伯湾表层海流气候学。它揭示了表层风、水深和密度横向梯度变化引起的表层流速的明显时空变化。夏季伊朗沿岸洋流(ICC)的平均速度在伊朗沿岸可达 0.33 m-s-1,而阿拉伯沿岸洋流(ACC)的平均速度在沙特阿拉伯沿岸可达 0.26 m-s-1。我们发现在年度、季节和月度气候中出现了 2 个主要气旋漩涡和 1 个次要气旋漩涡,而这些漩涡在夏季更为普遍。海湾中部的主要气旋涡于 5 月形成,以不同的模式持续到 11 月,并于 12 月减弱。由于分层/解分层过程导致表层厚度发生季节性变化,夏季的气候学平均流速高于冬季。卡塔尔沿海的平均流速在 6 月份最高,冬季最低。在卡塔尔北部和东北部沿海观测到的年平均、月平均和季节平均流速最高,而在卡塔尔西部沿海和东南部沿海观测到的流速最低。表层流速的年际变化明显,与厄尔尼诺-南方涛动(ENSO)和印度洋偶极子(IOD)有显著联系。年平均流速呈现正趋势,近海区域为 0.06-0.14 厘米-秒-年-1,近岸区域为 0.05-0.24 厘米-秒-年-1,其中拉斯拉凡附近的正趋势最高,杜坎附近最低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A climatological overview of surface currents in the Arabian Gulf with special reference to the Exclusive Economic Zone of Qatar

A climatological overview of surface currents in the Arabian Gulf with special reference to the Exclusive Economic Zone of Qatar

This study derives the climatology of surface currents in the Arabian Gulf using the current velocities obtained from the Copernicus Marine Service (CMEMS) for the period 1993–2019. It reveals distinct temporal and spatial variability in the surface current speeds induced by the variability in surface winds, bathymetry and the changes in the lateral gradients in density. The mean speed of the Iranian Coastal Current (ICC) during summer reaches up to 0.33 m·s−1 along the coast of Iran, while the mean speed of Arabian Coastal Current (ACC) reaches up to 0.26 m·s−1 along the coast of Saudi Arabia. We found the occurrence of 2 major and 1 minor cyclonic eddies in the annual, seasonal and monthly climatology, while these eddies are more prevalent during summer. The major cyclonic eddy in the central Gulf develops in May and persists till November with varying patterns, and decays in December. The climatological mean current speeds are higher during summer compared to winter, due to the seasonal changes in thickness of the surface layer by the stratification/destratification processes. The highest mean current speeds along the coast of Qatar are found in June and the lowest in winter months. The highest annual, monthly and seasonal mean current speeds are observed along the north and northeast coast of Qatar, while the lowest are observed along the west coast and southeast coast of Qatar. Interannual variability in surface current speeds is evident, with notable links with the El Niño–Southern Oscillations (ENSO) and Indian Ocean Dipole (IOD). The annual mean current speeds show positive trends, of the order of 0.06–0.14 cm·s−1·year−1 in the offshore regions and 0.05–0.24 cm·s−1·year−1 in the nearshore regions, wherein the highest positive trend is observed off Ras Laffan and the lowest off Dukhan.

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来源期刊
International Journal of Climatology
International Journal of Climatology 地学-气象与大气科学
CiteScore
7.50
自引率
7.70%
发文量
417
审稿时长
4 months
期刊介绍: The International Journal of Climatology aims to span the well established but rapidly growing field of climatology, through the publication of research papers, short communications, major reviews of progress and reviews of new books and reports in the area of climate science. The Journal’s main role is to stimulate and report research in climatology, from the expansive fields of the atmospheric, biophysical, engineering and social sciences. Coverage includes: Climate system science; Local to global scale climate observations and modelling; Seasonal to interannual climate prediction; Climatic variability and climate change; Synoptic, dynamic and urban climatology, hydroclimatology, human bioclimatology, ecoclimatology, dendroclimatology, palaeoclimatology, marine climatology and atmosphere-ocean interactions; Application of climatological knowledge to environmental assessment and management and economic production; Climate and society interactions
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