Does winter cooling lead to the subsurface salinity minimum off Saurashtra, India?
Does winter cooling lead to the subsurface salinity minimum off Saurashtra, India?
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冬季降温是否会导致印度索拉什特拉附近的地下盐度达到最低值？
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
S. Shenoi
中科院分区：
文献类型：
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作者：
S. R. Shetye;A. Gouveia;S. Shenoi
在11月至1月期间，东北季风的干冷风使阿拉伯海北部凉爽。印度索拉斯特拉半岛附近的降温强度最高。利用水文数据，我们提出，该地区的冷却，特别是在寒冷爆发期间，足以增加陆架水的密度，形成一个在约150米深度下沉和扩散的水团，其特征是弱盐度最小值，sigma-theta在25.5-26.6 gm/cm3范围内。东北季风海岸流将低盐度水平流送入盆地以及随后的混合层蒸发也对盐度最低补给起作用。
Cold and dry winds of the northeast monsoon cool the northern Arabian Sea during November-January. The intensity of cooling is highest in the proximity of the peninsula of Saurashtra, India. Using hydrographic data, we propose that the cooling in this region, particularly during cold outbreaks, increases the density of shelf waters sufficiently to form a water mass which sinks and spreads at a depth of about 150 m and is characterized by a weak salinity minimum with sigma-theta in the range of 25.5-26.6 gm/cm3. It appears that the advection of lower salinity water into the basin by the northeast monsoon coastal current and subsequent evaporation in the mixed-layer also plays a role in recharge of the salinity minimum.