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

德雷克海峡是南美洲和南极洲西部半岛之间的水域，因此通过巨大的南极绕极流（ACC）连接南大西洋和南太平洋。使用RV/AS LMGould，USAP补给船相对频繁的德雷克海峡轮渡，该建议将继续收集ACC天然阻塞点的上层海洋XBT温度和XTCD盐度数据。这将产生季节到年际时间尺度的额外水文观测，空间尺度从当前的核心到中尺度涡旋。这些高分辨率、多次重复的断面（每年多达6 ~7次交叉）经过质量控制、存档并提供给更广泛的社区，以促进对地球上主导洋流（ACC）变化模式的研究。 德雷克海峡XBT/XCTD样带时间序列现在可以追溯到1996年，并继续增加一些定量估计的长期趋势，南大洋锋，地表水质量的属性，他们对大气强迫气候相关的时间尺度。该提案还寻求更新近十年时间序列的努力，测量正在进行的表面二氧化碳分压（pCO 2）在整个德雷克海峡定期横断面。

The Drake Passage is the body of water between South America and the Western Antarctic Peninsula, thus connecting the Southern Atlantic and Southern Pacific Oceans through the unimpeded flow of the immense Antarctic Circumpolar Current (ACC).Using the relatively frequent ferry crossings of the Drake Passage by the RV/AS LMGould, the USAP supply ship, this proposal will continue the of collection of upper ocean XBT temperature and XTCD salinity data in this natural chokepoint for the ACC. This will yield additional hydrographic observations on seasonal to interannual timescales, and on spatial scales ranging from the current core to mesoscale eddies. These high-resolution, multi-repeat transects (up to 6 ~7 crossings per year) are quality controlled, archived and made available to the broader community in order to facilitate study of the modes of variability of the dominant oceanic current on the planet (the ACC). The Drake Passage XBT/XCTD transect time series now extends back to 1996, and continues to add to a number of quantitative estimates of the long term trends in Southern Ocean fronts, surface water mass properties, their response to atmospheric forcing on climate relevant time scales. This proposal also seeks renewal of a near decadal time series effort measuring the underway surface partial pressure of carbon dioxide (pCO2) in regular transects across the Drake Passage.