FLOW OF DEEP AND BOTTOM WATERS IN THE PACIFIC AT 10-DEGREES-N
FLOW OF DEEP AND BOTTOM WATERS IN THE PACIFIC AT 10-DEGREES-N
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DOI：
10.1016/0967-0637(93)90009-r
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发表时间：
1993-02-01
影响因子：
2.4
通讯作者：
TOOLE, JM
中科院分区：
文献类型：
--
作者：
JOHNSON, GC;TOOLE, JM
主要使用最近的跨太平洋CTD/O2剖面描述了北纬10度的太平洋中的下绕极水和北太平洋深水的流动。水团属性被用来定义这两个水团的位势等温线上的边界。在北纬10度的每个洋盆中，零风速面被设置在不同的位势等温线上，它们的选择受到水团性质和热风场的指导。然后，这些表面被用来估计每个水团的输送。东马里亚纳盆地下环极水的净输送估计为5.8x10(6)立方米S-1(正向北)，中太平洋盆地的净输送为8.1x10(6)立方米S-1，而通过雅普海沟进入菲律宾盆地的小流量为0.4x10(6)立方米S-1。在东北太平洋海盆，通过东太平洋隆起西侧的输送估计为-4.7x10(6)m~3·S~(-1)。危地马拉盆地没有下绕极水，因此，跨太平洋北纬10度的下绕极水的净输送估计为9.6x10(6)立方米S-1。该纬度北太平洋深水的净输送为2.6x10(6)m~3·S~(-1)，其中最强劲的特征是东北太平洋海盆东太平洋隆起西侧的-3.6x10(6)m~3 S~(-1)输送。最近在西太平洋重复进行的水文测量被用来确认最西边两个盆地的运输估计。最后，对北纬10度的流场(在本计算的不确定范围内的变化)的微小调整表明，在北纬24度时的输送方案与先前的研究一致。
Flow of Lower Circumpolar Water and North Pacific Deep Water is described in the Pacific at 10-degrees-N primarily using a recent trans-Pacific CTD/O2 section. Water-mass properties are used to define boundaries at potential isotherms for these two water masses. In turn, zero-velocity surfaces are set at different potential isotherms in each ocean basin along 10-degrees-N, their selection guided by the water-mass properties and the thermal wind field. These surfaces are then applied to estimate transport for each of the water masses. Net transport of Lower Circumpolar Water is estimated at 5.8 x 10(6) m3 s-1 (positive northward) in the East Mariana Basin and 8.1 x 10(6) m3 s-1 in the Central Pacific Basin, while a small flow of 0.4 x 10(6) m3 s-1 through the Yap Trench into the Philippines Basin is inferred. In the Northeast Pacific Basin a transport of -4.7 x 10(6) m3 s-1 over the western flank of the East Pacific Rise is estimated. There is no Lower Circumpolar Water in the Guatemala Basin, thus the net transport of Lower Circumpolar Water across 10-degrees-N in the Pacific is estimated to be 9.6 x 10(6) m3 s-1. A net transport of 2.6 x 10(6) m3 s-1 of North Pacific Deep Water is estimated across this latitude, with the most robust feature being a transport of -3.6 x 10(6) m3 s-1 over the western flank of the East Pacific Rise in the Northeast Pacific Basin. Recent repeated hydrographic measurements in the Western Pacific are used to confirm the transport estimates for the two westernmost basins. Finally, small adjustments to the 10-degrees-N flow field (changes within the uncertainties of the present calculations) are shown to result in a transport scheme that is consistent with previous studies at 24-degrees-N)