Circulation in the Northern Japan Sea Studied Chiefly with Radiocarbon
Circulation in the Northern Japan Sea Studied Chiefly with Radiocarbon
复制标题
主要用放射性碳研究日本海北部的环流
DOI：
10.1017/s0033822200042788
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发表时间：
2007
期刊：
影响因子：
8.3
通讯作者：
Y. Volkov
中科院分区：
文献类型：
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作者：
T. Aramaki;T. Senjyu;O. Togawa;S. Otosaka;T. Suzuki;T. Kitamura;H. Amano;Y. Volkov
2002年夏季观测到了日本海最北端区域的放射性碳浓度。100m以上海面δ14C平均值为52±8%，显著高于太平洋和鄂霍次克海。深水中δ14C随密度的增加而降低，最小值为−的70%。通过对14C等水文资料的分析，我们发现：1)对马暖流水到达塔塔尔斯基海峡南部的表层；2)最北部地区没有发生深对流，至少2001-2002年冬季以后没有发生；3)该地区先前形成的底层水可能沿着底坡向南下降并与日本海底层水混合。此外，在46°N以北的次表层发现了一个新的高盐度水团(>；34.09PSU)。
Radiocarbon concentrations in the northernmost region of the Japan Sea were observed during the summer of 2002. The averaged surface δ14C (above 100 m depth) was 52 ± 8%, which is significantly higher compared with the values of the Pacific Ocean and Okhotsk Sea. The δ14C in the deep water decreased with density, and the minimum value was −70%. By analyzing 14C and other hydrographic data, we found that i) the Tsushima Warm Current Water reaches to the surface layer in the southern Tatarskiy Strait; ii) deep convection did not occur in the northernmost region, at least not after the winter of 2001–2002; and iii) the bottom water that was previously formed in this region may step down southward along the bottom slope and mix with the Japan Sea Bottom Water. Furthermore, a new water mass characterized by high salinity (>34.09 psu) was found in the subsurface layer in the area north of 46°N.