Acta Oceanologica Sinica ( IF 1.4 ) Pub Date : 2021-05-07 , DOI: 10.1007/s13131-021-1720-7 Weifu Sun , Haibo Bi , Min Fu , Xi Liang , Yunhe Wang , Yu Liang , Jue Huang , Haijun Huang , Liwen Yan , Qinglong Yu , Shuang Liang
Sea ice export through the Baffin Bay plays a vital role in modulating the sea ice cover variability in the Labrador Sea. In this study, satellite-derived sea ice products are used to obtain the sea ice area flux (SIAF) through the three passages in the Baffin Bay (referred to as A, B, and C for the north, middle, and south passages, respectively). The spatial variability of the monthly sea ice drift in the Baffin Bay is presented. The interannual variability and trends in SIAF via the three passages are outlined. The connection to several large-scale atmospheric circulation modes is assessed. Over the period of 1988–2015, the average annual (October to the following September) SIAF amounts to 555×103 km2, 642×103 km2, and 551×103 km2 through Passages A, B, and C, respectively. These quantities are less than that observed through the Fram Strait (FS, 707×103 km2) of the corresponding period. The positive trends in annual SIAF, on the order of 53.1×103 km2/(10 a) and 43.2×103 km2/(10 a) (significant at the 95% confidence level), are identified at Passages A and B, respectively. The trend of the south passage (C), however, is slightly negative (−13.3×103 km2/(10 a), not statistically significant). The positive trends in annual SIAF through the Passages A and B are primarily attributable to the significant increases after 2000. The connection between the Baffin Bay sea ice export and the North Atlantic Oscillation is not significant over the studied period. By contrast, the association with the cross-gate sea level pressure difference is robust in the Baffin Bay (R equals 0.69 to 0.71, depending on the passages considered), but relatively weaker than that over FS (R=0.74).
中文翻译:
巴芬湾海冰运输的时空特征及其与大气变化的关系
通过巴芬湾出口的海冰在调节拉布拉多海的海冰盖变化中起着至关重要的作用。在这项研究中,卫星衍生的海冰产品用于通过巴芬湾的三个通道(北,中和南通道分别称为A,B和C)获得海冰面积通量(SIAF),分别)。提出了巴芬湾海冰每月漂移的空间变异性。通过三个段落概述了SIAF的年际变化和趋势。评估了与几种大规模大气环流模式的联系。以上的1988至2015年期间,平均每年(十月到以下九月)SIAF等于555×10 3公里2,642×10 3公里2,和551×103公里2分别通过通道A,B和C。这些数量少于通过相应时期的弗拉姆海峡(FS,707×10 3 km 2)观察到的数量。在通道A和通道A处确定了年度SIAF的正趋势,分别为53.1×10 3 km 2 /(10 a)和43.2×10 3 km 2 /(10 a)(在95%的置信度下显着)。 B分别。但是,南通道(C)的趋势略微为负(−13.3×10 3 km 2/(10 a),无统计学意义)。通过通道A和通道B的年度SIAF的积极趋势主要归因于2000年之后的显着增长。在研究期内,巴芬湾海冰出口与北大西洋涛动之间的联系并不显着。相比之下,在巴芬湾,与闸门海平面压差的关联性很强(取决于所考虑的航路,R等于0.69至0.71),但比FS上的相对弱(R = 0.74)。