High Resolution Underway Air-Sea Observations in Drake Passage for Climate Science

第一部分：在美国南极船只劳伦斯·M·古尔德号频繁穿越德雷克航道的情况下，进行了一系列正在进行的测量。这些数据是南大洋为数不多的重复进行船上测量的年份之一。现在有了近20年的数据，这项提议的主要科学目标是继续分析德雷克航道的时间序列。第二部分：部分分析是：(1)描述海洋能量的季节和长期分布，并将其与风、浮力、地形强迫和汇联系起来；(2)描述和联系ACC锋面、水团和上升流的季节和长期变化，并将其与生物地球化学和气候变化联系起来。利用德雷克航道的高分辨率、近重复的可耗尽海温仪(XBT)和声学多普勒海流剖面仪(ADCP)断面采样，研究了南极绕极流(ACC)在季节到年际以及从海流核心到涡旋的空间尺度上的海温、盐度、海流和后向散射的变化模式。该项目是对收集ADCP和其他USAP船舶在航数据的长期支持的延续，如ASRV Laurence M Gould本奖项反映了NSF的法定使命，通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Part 1: On frequent crossings of the Drake Passage on the US Antarctic vessel ARSV Laurence M. Gould, a range of underway measurements are taken. These data represent one of the few repeat year around shipboard measurements in the Southern Ocean. With close to two decades of data now available, the primary science objectives of this proposal are to continue to analyze the Drake Passage time series. Part 2: Some of the analyses are (1) describe and relate the seasonal and long-term ocean energy distribution to wind, buoyancy and topographic forcing and sinks, and (2) describe and relate seasonal and long-term changes in the ACC fronts, water masses and upwelling to biogeochemical and climate variability. High-resolution, near-repeat Expendable Bathythermograph (XBT) and Acoustic Doppler Current Profiler (ADCP) transect sampling in Drake Passage is thus used to study modes of variability in ocean temperature, salinity, currents and backscatter in the Antarctic Circumpolar Current (ACC) on seasonal to interannual time frames, and on space scales from current cores to eddies. This project is a continuation of the longstanding support for collecting the ADCP and other underway data on USAP vessels, such as the ASRV Laurence M GouldThis award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.