Interannual variability of newly formed Labrador Sea Water from 1994 to 2005
Interannual variability of newly formed Labrador Sea Water from 1994 to 2005
复制标题
1994年至2005年新形成的拉布拉多海水的年际变化
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
J. Fischer
中科院分区：
文献类型：
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作者：
Tom Avsic;J. Karstensen;U. Send;J. Fischer
在拉布拉多海中部收集的系泊记录进行了评估关于1994年和2005年之间新形成的拉布拉多海水（LSW）的水文特性的变化。这一时间序列比以前在对流活动减少的背景下讨论的任何时间序列都要长，时间分辨率也要高得多。对于1500米以上的深度范围，确定了1997 - 1999年和2003 - 2005年两个不同的变暖期，导致最近十年温度大幅上升0.6°C。LSW源水性质的时间序列表明，海洋输送的热量和淡水异常发挥了重要作用，在确定最终的对流深度。2005年，LSW的温度和盐度达到了与20世纪70年代初相当的高值，这是在大盐度异常之后不久。
Mooring records collected in the central Labrador Sea are evaluated regarding the variability of the hydrographic properties of newly formed Labrador Sea Water (LSW) between 1994 and 2005. This time series is longer and of significantly higher temporal resolution than any discussed before in the context of decreasing convection activity. For the upper 1500 m depth range two distinct warming periods are identified from 1997 to 1999 and from 2003 to 2005 leading to a substantial temperature increase of 0.6°C over the recent decade. The time series of LSW source water properties suggest that ocean transport of heat and freshwater anomalies play a significant role in determining the ultimate convection depth. In 2005 the LSW temperature and salinity had reached high values comparable to those from the early 1970's, shortly after the passage of the Great Salinity Anomaly.