Spatial and Temporal Patterns of Upper Ocean Variability from the Drake Passage High-Resolution XBT/XCTD Observations

利用RV/AS古尔德号补给船频繁穿越德雷克航道前往帕尔默站的情况，加州大学圣地亚哥分校的研究人员将继续在南极绕极流(ACC)的这个自然阻塞点收集上层海洋XBTS(消耗性水温、温度)和XTCD(消耗性温度、电导率和深度剖面仪)盐度数据。这将继续产生从季节到年际时间尺度以及从当前核心到中尺度涡旋的空间尺度上的水文观测。这些高分辨率、多次重复的断面和深度剖面(每年多达12-16个断面)经过质量控制、存档并提供给更广泛的社区，以便于研究地球上主要的表层洋流ACC的变化模式。Drake Passage XBT/XCTD断面时间序列现在可以追溯到1996年，并继续增加对南大洋锋面长期趋势、地表水质量特性、它们对气候相关时间尺度上的大气强迫的反应及其在推动南大洋经向翻转环流方面的作用的一些关键定量估计。

Using the frequent crossings of the Drake Passage by the RV/AS Gould as USAP supply ship to Palmer Station, UCSD researchers will continue the collection of upper ocean XBTs (expendable Bathythermograph for depth, temperature) and XTCD (expendable temperature, conductivity and depth profiler) salinity data in this natural chokepoint for the Antarctic Circumpolar Current (ACC). This will continue to yield 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 and depth profiles (up to 12-16 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 ACC, the dominant surface ocean current on the planet.The Drake Passage XBT/XCTD transect time series now extends back to 1996, and continues to add to a number of key 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, and their roles in driving the meridional overturning circulation of the Southern Ocean.