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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Structure and transports of the East Greenland Current at 75 deg N from moored current meters
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Structure and transports of the East Greenland Current at 75 deg N from moored current meters

机译：系泊电流计在75度N处东格陵兰海流的结构和运输

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The East Greenland Current runs from 80 deg N to 60 deg N from the Fram Strait to the Denmark Strait via the Nordic Seas. It transports waters from the Arctic and the Nordic Seas into he Atlantic and also acts as a western-intensified southward return flow for waters recirculating within the Greenland Sea Gyre, itself an area important for deep water formation. Data from current meters moored across the current at 75 deg N in 1994-1995 show a large seasonal variation in the current. The annual mean transport is 21 +- 3 Sv (taking 9 deg W as the eastern boundary), varying from 11 Sv in summer to 37 Sv in winter (errors approximately +- 5 Sv). No significant seasonal signal has been observed in the Fram or Denmark Straits, suggesting that the seasonal transport is confined within the Greenland Sea. Using temperature and velocity data, we split the flow at 75 deg N into two parts, a mainly wind-driven circulation (annual mean of order 19 Sv), which is trapped within the Greenland Sea Gyre and exhibits a large seasonal cycle, transporting, predominantly, the waters of the Greenland Sea, and a steadier throughflow probably thermohaline-driven (of order 8 Sv in the annual mean), with very little seasonal variation. Data from previous years, 1987-1994, indicate the interannual variability of the current is low. Assuming a spatially coherent structure to the current, we extend the time series of the transport back to 1991, and suggest it may be possible to monitor the total transport with one suitably placed mooring.
机译：东格陵兰洋流从Fram海峡到北海，经北欧海向北80度到北60度。它把水从北极和北欧海运到大西洋，并作为格陵兰岛海涡内循环水的西部向南回流，这本身是深水形成的重要区域。 1994-1995年，来自停泊在75度N处的洋流的电流表的数据显示，洋流存在较大的季节性变化。年平均运输量为21±3 Sv（以9度W为东部边界），从夏季的11 Sv到冬季的37 Sv（误差约+5 Sv）不等。在弗拉姆海峡或丹麦海峡没有观察到明显的季节性信号，这表明季节性运输被限制在格陵兰海之内。利用温度和速度数据，我们将75度N的气流分为两部分，一个主要是风驱动的环流（年平均速度为19 Sv），该环流被困在格陵兰海涡流中，并表现出较大的季节性周期，主要是格陵兰海的水域和更稳定的通流，可能是受热盐酸盐驱动的（年平均8 Sv量级），几乎没有季节性变化。 1987-1994年的前几年数据表明，当前的年际变化很小。假设当前的空间结构一致，我们将运输的时间序列扩展到1991年，并建议有可能使用一个适当的系泊设备来监视总运输。

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