Salinity trends on the Siberian shelves

Salinity trends on the Siberian shelves
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西伯利亚大陆架的盐度趋势

DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
W. Ermold
W. Ermold
中科院分区:
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文献类型:
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作者:
M. Steele;W. Ermold

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我们对以淡水为主的西伯利亚大陆架观测到的长期(~ 100年)盐度趋势进行了分析。对白海(WS)、喀拉海(KS)、拉普捷夫海(LS)和东西伯利亚海(ESS)进行了多元回归分析。自1930年以来,WS获得了淡水,而ESS失去了淡水,这与这一时期的河流流量趋势一致。在过去的20年中,河流流量和直接降水的增加都可以解释WS观测到的盐度下降,但不能解释KS。LS和ESS的盐度趋势表明,海洋环流在这些地区起着主导作用,近年来,这些地区的淡水沿着海岸向东转移,而不是向北流向深海。
We present an analysis of observed long‐term (∼100 year) salinity trends on the freshwater‐dominated Siberian continental shelves. A multiple regression was performed in the White Sea (WS), the Kara Sea (KS), the Laptev Sea (LS), and the East Siberian Sea (ESS). Since 1930, the WS has gained freshwater while the ESS has lost it, consistent with river discharge trends over this period. Over the past 20 years, increases in both river discharge and direct precipitation can explain observed salinity decreases in the WS, but not in the KS. Salinity trends in the LS and ESS indicate that ocean circulation plays a dominate role in these areas, where in recent years freshwater has been diverted eastward along the coast, rather than northward toward the deep ocean.