Collaborative Research: Southern Ocean Current Observations from the U.S. Antarctic Research Vessels, 2010-14

“这个奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。“来自斯克里普斯海洋学研究所（UCSD）和夏威夷大学的研究人员将继续进行1999年开始的努力，利用南极研究破冰船Nathaniel B Palmer和Lawrence M Gould正在进行的海流剖面分析能力。 安装在船体上的船载声学多普勒海流剖面仪（ADCP）能够采集、处理和存档上层海流速度以及这些船只航行通过的南大洋沃茨的声学后向散射信号的结构。德雷克海峡（RVIB古尔德），南极绕极流（ACC）的一个主要阻塞点，延长时间序列的重复巡航轨迹的高密度，是在提供气候变化的影响，在遥远的和观察不足的南大洋的记录感兴趣。 全球环流模型表明，南大洋对气候变化很敏感，可能比全球海洋的其他部分变暖得更快。季节年际变率的ACC，涡引起的交流相比，平均电流混合的平衡，涡度平衡的德雷克通道和绕极风与地球的相互作用？在不断变化的气候制度下的最大洋流系统是这些测量所告知的一些基本问题。后向散射参数的变化还作为一个综合信号的durnally迁移浮游动物种群，如南极洲食物链的关键物种南极磷虾。

"This Award is funded under the American Recovery and Reinvestment Act 0f 2009 (Public Law 111-5)."Researchers from Scripps Inst of Oceanography (UCSD) and the University of Hawaii will continue an effort commenced in 1999 to use underway current profiling capabilities of the Antarctic Research Ice Breakers, Nathaniel B Palmer and Lawrence M Gould. Hull mounted shipboard acoustic Doppler current profilers (ADCPs) enable the acquisition, processing and archiving of upper ocean current velocities and also the structure of the acoustic backscatter signal of Southern Ocean waters through which these vessels ply their transects. The high density of the repeat cruise tracks of the lengthening time series in the Drake Passage (RVIB Gould), a major choke point of the Antarctic Circumpolar Current (ACC), is of interest in providing a record of the effects of climate change in the remote and under observed Southern Ocean. Global circulation models suggest that the Southern Ocean is sensitive to climate change, and likely to warm much faster than other parts of the global ocean. Seasonal to interannual variability of the ACC, the balance of eddy induced exchange compared to mean current mixing, the vorticity balance of the Drake passage and the interaction of circumpolar winds with the planet?s largest ocean current system under changing climate regimes are some of the fundamental questions informed by these measurements. The variability of the backscattering parameter serves additionally as an integrating signal of diurnally migrating zooplankton populations such as Euphausia superba, a key Antarctic food chain species.