期刊
NATURE GEOSCIENCE
卷 3, 期 5, 页码 327-331出版社
NATURE PORTFOLIO
DOI: 10.1038/NGEO842
关键词
-
资金
- Ministry of Education, Science, Sports and Culture [14403006, 17340138, 20244075, 20540419, 21310002]
- Australian government
- Australian National Antarctic Research Expeditions
- Department of Climate Change
- Bureau of Meteorology
- CSIRO
- Grants-in-Aid for Scientific Research [20244075, 20540419, 20221001, 21310002, 14403006, 17340138] Funding Source: KAKEN
The primary paths for the transport of Antarctic Bottom Water from the Southern Ocean into the global ocean are the deep western boundary currents east of the Antarctic Peninsula and the Kerguelen plateau(1). Previous ship-based observations documented distinct water properties and velocities associated with a deep western boundary current in the Kerguelen region(2-7), but the mean flow is as yet unconstrained. Here we report measurements from a coherent array of eight current-meter moorings that reveal a narrow and intense equatorward flow extending throughout the water column just east of the Kerguelen plateau. Velocities averaged over two years exceed 20 cm s(-1) at depths of about 3,500 m, the strongest mean deep western boundary current flow yet observed at similar depths. We estimate the mean equatorward transport of water colder than 0 degrees C at 12.3 +/- 1.2 x 10(6) m(3) s(-1), partially compensated by poleward flow. We also estimate the net equatorward flow of water colder than 0.2 degrees C at about 8 x 10(6) m(3) s(-1), substantially higher than the 1.9 x 10(6) m(3) s(-1) reported from the boundary current that carries dense water from the Weddell Sea into the Atlantic Ocean north of the Falkland plateau(8). We conclude that the Kerguelen deep western boundary current is a significant pathway of the global ocean's deep overturning circulation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据