Pacific Ocean Circulation Based on Observation
Pacific Ocean Circulation Based on Observation
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DOI：
10.1007/s10872-010-0034-8
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发表时间：
2010-06-01
影响因子：
2.3
通讯作者：
Fujio, Shinzou
中科院分区：
文献类型：
--
作者：
Kawabe, Masaki;Fujio, Shinzou
深入了解太平洋环流是解决全球气候和环境问题的必要条件。在这里，我们提出了一个新的图片的环流综合观测结果。南极绕极流（ACC）向北太平洋输送12、7和5 Sv（10（6）m（3）s（-1））的绕极深层下、上层沃茨（LCDW，UCDW）和南极中层水（AAIW）。LCDW气流在中太平洋海盆分为西支（4 Sv）和东支（8 Sv），后一支分支的近一半进一步分离，在夏威夷海脊以南向东流入东北太平洋海盆（NEPB）。大部分的LCDW在这条南部路线（4 Sv）上升，在南部和中纬度东部地区的NEPB。其余的东部分支与西部分支的近一半汇合;汇合处向北流动，沿着阿留申海沟进入NEPB。这条北方路线上的大部分LCDW（5 Sv）上升到NEPB北方（特别是东北部）地区的上层深层，并转化为北太平洋深水（NPDW）。NPDW在上层深层向南移动，并在夏威夷群岛附近与UCDW混合。13 Sv的修正NPDW返回ACC。北太平洋的剩余量（11 Sv）在表层/中间层流出印度洋和北冰洋。
A thorough understanding of the Pacific Ocean circulation is a necessity to solve global climate and environmental problems. Here we present a new picture of the circulation by integrating observational results. Lower and Upper Circumpolar Deep Waters (LCDW, UCDW) and Antarctic Intermediate Water (AAIW) of 12, 7, and 5 Sv (10(6) m(3)s(-1)) in the lower and upper deep layers and the surface/intermediate layer, respectively, are transported to the North Pacific from the Antarctic Circumpolar Current (ACC). The flow of LCDW separates in the Central Pacific Basin into the western (4 Sv) and eastern (8 Sv) branches, and nearly half of the latter branch is further separated to flow eastward south of the Hawaiian Ridge into the Northeast Pacific Basin (NEPB). A large portion of LCDW on this southern route (4 Sv) upwells in the southern and mid-latitude eastern regions of the NEPB. The remaining eastern branch joins nearly half of the western branch; the confluence flows northward and enters the NEPB along the Aleutian Trench. Most of the LCDW on this northern route (5 Sv) upwells to the upper deep layer in the northern (in particular northeastern) region of the NEPB and is transformed into North Pacific Deep Water (NPDW). NPDW shifts southward in the upper deep layer and is modified by mixing with UCDW around the Hawaiian Islands. The modified NPDW of 13 Sv returns to the ACC. The remaining volume in the North Pacific (11 Sv) flows out to the Indian and Arctic Oceans in the surface/intermediate layer.