Mesoscale, Seasonal and Inter-Annual Variability of Surface Water CO2 in the Drake Passage

0003609 Takahashi本提案用于安装、维护和数据分析劳伦斯·M·古尔德号上的设备，以测量德雷克航道横断面表层水中溶解的二氧化碳(PCO2)以及偶尔出现的总二氧化碳(TCO2)。这项拟议的工作是在纳撒尼尔·B·帕尔默号上进行的类似测量的延伸，补充了类似的表面温度和当前数据。南大洋是全球碳收支的重要组成部分。地表温度低，因此垂直稳定性低，结冰和大风形成，为大气和海洋水库之间的气态二氧化碳交换创造了非常活跃的环境。德雷克海峡是南极绕极洋流及其相关锋面必须通过的最窄的点，也是测量气体交换纬度梯度的最有效位置。补充的温度和海流数据，加上卫星图像，将不仅可以定量描述二氧化碳变异性的来源和计算海-气二氧化碳通量，而且还可以估计生物界的净生产量和碳输出。

0003609TakahashiThis proposal is for the installation, maintenance, and data analysis of equipment on the R/V Laurence M. Gould to measure dissolved carbon dioxide gas (pCO2) along with occasional total carbon dioxide (TCO2) in surface waters on transects of Drake Passage. The proposed work is an extension of similar measurements made aboard R/V Nathaniel B. Palmer, and complements similar surface temperature and current data.The Southern Ocean is an important component of the global carbon budget. Low surface temperatures with consequently low vertical stability, ice formation, and high winds produce a very active environment for the exchange of gaseous carbon dioxide between the atmospheric and oceanic reservoirs. The Drake Passage is the narrowest point through which the Antarctic Circumpolar Current and its associated fronts must pass, and is the most efficient location for the measurement of latitudinal gradients of gas exchange. The complementary tempearture and current data, supplemented by satellite imagery will allow not only the quantitative description of the sources of pCO2 variability and the calculation of air-sea CO2 fluxes, but also estimates of the net production and carbon export by the biological community.***