Heat and freshwater budgets of the Nordic seas computed from atmospheric reanalysis and ocean observations
Heat and freshwater budgets of the Nordic seas computed from atmospheric reanalysis and ocean observations
复制标题
根据大气再分析和海洋观测计算出的北欧海洋的热量和淡水收支
DOI：
10.1029/2011jc006939
复制
发表时间：
2011
影响因子：
--
通讯作者：
A. Jenkins
中科院分区：
文献类型：
--
作者：
O. Segtnan;T. Furevik;A. Jenkins
[1]北欧海的热量和淡水收支是根据大气再分析数据和海洋观测计算的，主要是在1990-1999年期间进行的。总热损失为198 TW，淡水增益为52 mSv (1 Sv = 106 m3 s - 1)，剩余量分别为1 TW和3 mSv。还计算了北欧海域内三个分区域的预算：挪威海、巴伦支海和格陵兰/冰岛海。如果不考虑将格陵兰/冰岛海与挪威海分开的北极锋的热量和淡水的转移，热量和淡水预算的剩余量分别在- 36 TW至34 TW和- 16 mSv至19 mSv之间。为了结束所有分区域的预算，必须包括由北极锋的涡旋沉降或未计算在内的洋流引起的- 35太瓦和17毫希沃特的横锋通量。结合对北极锋两侧平均温度和盐度的观测，这些值表明锋间水交换率约为4西沃特。最强烈的水团变化发生在挪威海，那里的海洋热损失和淡水输入分别等于119太瓦和41毫西弗。
[1] The heat and freshwater budgets of the Nordic seas are computed from atmospheric reanalysis data and ocean observations, mainly taken during the period 1990–1999. The total heat loss is 198 TW and the freshwater gain 52 mSv (1 Sv = 106 m3 s−1), with residuals equal to 1 TW and 3 mSv, respectively. Budgets are also computed for three subregions within the Nordic seas: the Norwegian Sea, the Barents Sea and the Greenland/Iceland Sea. Without accounting for transfer of heat and freshwater across the Arctic Front, which separates the Greenland/Iceland Sea from the Norwegian Sea, the residuals of the heat and freshwater budgets range from −36 TW to 34 TW and from −16 mSv to 19 mSv, respectively. To close the budgets of all subregions cross-frontal fluxes of −35 TW and 17 mSv, caused either by eddy shedding along the Arctic Front or ocean currents not accounted for, must be included. Combined with observations of the average temperature and salinity on both sides of the Arctic Front these values indicate a rate of cross-frontal water exchange of approximately 4 Sv. The most intense water mass modifications occur in the Norwegian Sea, where ocean heat loss and freshwater input are equal to 119 TW and 41 mSv, respectively.