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

第一部分：在美国南极船ARSV Laurence M. Gould频繁穿越德雷克海峡时，进行了一系列正在进行的测量。这些数据是在南大洋进行的为数不多的重复年度船载测量之一。现在有了近二十年的数据，这项提议的主要科学目标是继续分析德雷克通道的时间序列。第二部分：一些分析是(1)描述和联系季节性和长期海洋能量分布与风、浮力、地形强迫和汇；(2)描述和联系ACC锋、水团和上升流的季节性和长期变化与生物地球化学和气候变率。因此，采用高分辨率、近重复消耗性深海温度仪（XBT）和声学多普勒洋流剖面仪（ADCP）在德雷克海峡取样，研究了南极环极流（ACC）在季节到年际时间框架以及从洋流核心到涡旋的空间尺度上的海洋温度、盐度、洋流和后向散射的变化模式。该项目是长期支持收集ADCP和USAP船舶（如ASRV Laurence M gould）上其他正在进行的数据的延续。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值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.