Extension of Time Series at 21 Degrees N. East Pacific Rise to 1991/1192

该项目将继续对位于东太平洋隆起以北21度的热液地点的喷口流体进行时间序列研究。自从1979年发现这个热液地点以来，对这个地点的三次探险已经确定，四个喷口区域的出口温度和明显的流体成分差异随着时间的推移保持不变。该项目将使首席调查员能够记录每个地点的化学和温度的任何变化，并将这一热液系统的研究延长到十年以上。这些结果将增进对海底热液系统演化的了解，并将进一步限制控制元素流入海洋的热液通量的过程。

This project will continue the time series study of the vent fluids at the hydrothermal site located a 21 degrees north on the East Pacific Rise. Since this hydrothermal site was discovery in 1979 three expeditions to this location have established that the exit temperatures and distinct interfield differences in fluid composition have remained constant with time at the four vent fields. This project will allow the principal investigator to document any changes in chemistry and temperature at each site and will extend the study of this hydrothermal system to over a decade. The results will improve understanding of the evolution of seafloor hydrothermal systems and will further constrain the processes that control the hydrothermal fluxes of elements into the oceans.