CFC Indicating Renewal of the Japan Sea Deep Water in Winter 2000–2001
CFC Indicating Renewal of the Japan Sea Deep Water in Winter 2000–2001
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CFC 指示 2000-2001 年冬季日本海深水更新
DOI：
10.1023/b:joce.0000009597.33460.d7
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发表时间：
2003
影响因子：
2.3
通讯作者：
T. Aramaki
中科院分区：
文献类型：
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作者：
S. Tsunogai;Kentaro Kawada;S. Watanabe;T. Aramaki
2000年和2001年两次测定了日本海西北部水柱中氯氟化碳的分布。2000年，在距符拉迪沃斯托克约300公里的三个测站(北纬40-41°，东经132-133°)，氟氯化碳-11浓度几乎随深度呈指数下降，从几百米深处的6pmol/kg下降到约3400米深处的0.3pmol/kg或更低。2001年，底层水中的氯氟化碳-11浓度急剧增加，达到2pmoL/kg，而东北方向约450kM处的一个站(北纬42度，东经136.5度)的氯氟化碳浓度并没有增加。这是由于底水被沿大陆坡向下流动的地表水所取代，正如Tsunogaiet等人(1999)所建议的那样，他提出了大陆架泵。此外，在水深3000米以上的整个水柱中都观察到了氟氯化碳-11浓度的增加，尽管增加的比例约为20%，比底层水小一个数量级。库存量的增加几乎是3000米以下海底的四倍，相当于2000年总库存量的六分之一左右。这一增长还意味着3%的深水被最近的地表水取代，或者，如果每年发生周转，则深水的周转时间约为30年。
The distributions of CFC (chlorofluorocarbon) in the water column was determined twice in 2000 and 2001 in the northwestern Japan Sea. In 2000 the CFC-11 concentration decreased almost exponentially with depth from 6 pmol/kg at a few hundred m deep to 0.3 pmol/kg or less at the bottom of about 3400 m depth at three stations (40–41°N, 132–133°E) about 300 km off Vladivostok. In 2001 the CFC-11 concentration increased sharply up to 2 pmol/kg in the bottom water, while it did not increase at a station (42.0°N, 136.5°E) about 450 km away to the northeast. This is due to the renewal of the bottom water which is replaced by the surface water flowing down along the continental slope, as suggested by Tsunogaiet al.(1999), who proposed the continental shelf pump. Furthermore, an increase in the CFC-11 concentration was observed throughout the entire water column above 3000 m depth, although the proportion of the increase was about 20%, which was one order of magnitude smaller than that in the bottom water. The increase in inventory is almost four times larger than that in the bottom water below 3000 m depth which is equivalent to about 1/6 of the total inventory found in 2000. The increase also means that 3% of the deep water was replaced by the recent surface water, or, if the turnover occurs every year, that the turnover time of the deep water to be about 30 years.