Seasonal to inter-annual variability of temperature and salinity in the Greenland Sea Gyre: heat and freshwater budgets
Seasonal to inter-annual variability of temperature and salinity in the Greenland Sea Gyre: heat and freshwater budgets
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DOI：
10.1111/j.1600-0870.2009.00453.x
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发表时间：
2010-01
期刊：
影响因子：
--
通讯作者：
K. Latarius;D. Quadfasel
中科院分区：
文献类型：
--
作者：
K. Latarius;D. Quadfasel
摘要利用格陵兰海环流六年的浮标资料，研究了从季节到年际的温度和盐度的变化。海洋-大气和海洋内部通量对热量和淡水的影响主要（约90%）局限于700米以上。在整个水柱的平均速率为0.05 K年-1变暖的观察，而淡水含量主要是由年际变化不包含的趋势。在年平均值中，环流通过其边界向整个水柱输出淡水。淡水的输入发生在夏季仅在上50米。热量在上方50米处输出，而在环流下方冷却周围环境。在北极地中海的水团转换的环流的净效应是小的，并不重新加强北欧海翻转环流的环流。
Abstract Six years of autonomous profiling float data from the Greenland Sea Gyre are used to detect changes in temperature and salinity of the water column on time scales from seasonal to inter-annual. The effect of ocean—atmosphere and internal ocean fluxes on heat and freshwater is largely (about 90%) confined to the upper 700 m. Throughout the water column a warming at a mean rate of 0.05 K year-1 is observed, whereas the freshwater content is dominated by inter-annual changes not containing trends. In the annual mean the Gyre exports freshwater across its boundary throughout the water column. Import of freshwater takes place only in the upper 50 m during summer. Heat is exported in the upper 50 m, while below the gyre cools the surrounding. The net effect of the gyre on the water mass conversion in the Arctic Mediterranean is small and the gyre does not re-enforce the Nordic Seas overturning circulation.