Collaborative Research: Investigating Biogeochemical Fluxes and Linkages To Climate Change With Multi-Scale Observations In The Drake Passage

南大洋在调节全球碳循环方面发挥着关键作用，但就人为造成的大气二氧化碳负担而言，全球海洋通量的大小甚至迹象仍不确定。这在一定程度上是由于在世界海洋的这一偏远地区缺乏测量。该项目继续在德雷克海峡进行多年的船上化学测量，以检测海洋碳循环的变化，并提高对驱动南大洋自然变异性和长期变化的机制的理解。该项目是对正在进行的表面二氧化碳分压（pCO2）的上层海洋测量的延续，使用了USAP补给船RV/AS LMGould频繁通过德雷克海峡的渡轮。总的来说，在过去的十年中（自2002年以来），已经积累了200多个pCO2剖面，以及研究海洋碳酸盐系统中其他感兴趣的参数的离散样本，如总CO2 （TCO2）值，表面TCO2的同位素（13C/12C和14C/12C）比率。国际科学界可以很容易地获得德雷克海峡的数据，并可作为遥感观测和数值耦合地球系统模式的验证和约束条件。

The Southern Ocean plays a key role in modulating the global carbon cycle, but the size and even the sign of the global ocean flux terms of the atmospheric burden of man-made CO2 are still uncertain. This is in part due to the lack of measurements in this remote region of the world ocean. This project continues a multi-year time series of shipboard chemical measurements in the Drake Passage to detect changes in the ocean carbon cycle and to improve the understanding of mechanisms driving natural variability and long-term change in the Southern Ocean.This project is a continuation of collection of upper ocean measurements of the underway surface partial pressure of carbon dioxide (pCO2), using frequent ferry crossings of the Drake Passage by the RV/AS LMGould, the USAP supply ship. Overall, more than 200 transects over the past decade (since 2002) have now been accumulated of pCO2 profiles, along with discrete samples for other parameters of interest in studying the ocean carbonate system such as total CO2 (TCO2) values, isotopic (13C/12C and 14C/12C) ratios in surface TCO2. The Drake Passage data are made readily available to the international science community and serve as both validation and constraints of remotely sensed observations and numerical coupled earth systems models.