Transport and structure within the Antarctic Circumpolar Current to the north of south Georgia
Transport and structure within the Antarctic Circumpolar Current to the north of south Georgia
复制标题
乔治亚州南部以北南极绕极流内的运输和结构
DOI：
10.1029/1999gl011131
复制
发表时间：
2000
影响因子：
5.2
通讯作者：
S. Thorpe
中科院分区：
文献类型：
--
作者：
P. Trathan;M. Brandon;E. Murphy;S. Thorpe
南极绕极流（ACC）穿越南格鲁吉亚北部的崎岖地形。在该区域，通常认为极锋（PF）的地下表达发生在莫里斯尤因浅滩（MEB）以北，靠近亚南极锋（SAF）。然而，1996年1月，爱国阵线位于河岸以南，与苏丹武装部队分开，其位置很可能受到当地水深测量的限制。高速率的运输（25西弗东）目前在PF，与以前的估计，目前的核心。高运输率（20西弗向西）也存在沿着北方大陆架的南格鲁吉亚靠近南部ACC前线（sACCF）以前曾报告。在我们占领期间，没有遇到sACCF，因为它可能位于调查区域之外。与最近的环极分析的比较强调了该地区变化的潜力。
The Antarctic Circumpolar Current (ACC) crosses rugged topography to the north of South Georgia. In this region the subsurface expression of the Polar Front (PF) is generally thought to occur north of the Maurice Ewing Bank (MEB) close to the Subantarctic Front (SAF). However, in January 1996 the PF was south of the bank, separate from the SAF, in a position where it was most likely constrained by local bathymetry. High rates of transport (25 Sv eastward) were present at the PF, consistent with previous estimates for this current core. High transport rates (20 Sv westward) were also present along the northern shelf of South Georgia close to where the southern ACC Front (sACCF) has previously been reported. During our occupation, the sACCF was not encountered as it probably lay outside the survey area. Comparisons with recent circumpolar analyses emphasise the potential for variability in the region.