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，但人为CO2大气负担的全球海洋通量项的大小甚至符号仍然不确定。这部分是由于在世界海洋的这个偏远地区缺乏测量。 该项目继续在德雷克海峡进行多年时间序列的船载化学测量，以探测海洋碳循环的变化，并增进对南大洋自然变异和长期变化的驱动机制的了解。利用USAP补给船RV/AS LMGould频繁穿过德雷克海峡的渡轮。总体而言，在过去十年（自2002年以来），200多个断面现已积累了pCO 2剖面，沿着还有研究海洋碳酸盐系统所关注的其他参数的离散样本，如总CO2（TCO 2）值、表面TCO 2中的同位素（13 C/12 C和14 C/12 C）比。 德雷克通道的数据可随时提供给国际科学界，作为遥感观测和地球系统耦合数值模型的验证和制约因素。

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.