US GLOBEC: Investigation of Wate-Mass Exchange Across the Tidal Mixing Front over Southern Georges Bank and Its Impact on Larval Fish and Zooplankton Populations

美国GLOBEC：乔治南岸潮汐混合锋的水团交换及其对仔鱼和浮游动物种群的影响本项目将重点研究乔治南岸潮汐混合锋的水团交换和混合及其对仔鱼和浮游动物种群的影响。 作为该项目的一部分，将于1999年5月至6月在东北峰和南翼的潮汐混合锋区域进行一系列实地研究。 这些研究将包括染料和漂流物追踪以及ADCP、CTD和视频浮游生物记录仪调查。 此外，研究人员将使用诊断模型来探索近锋面运动和混合速率的差异如何影响幼虫和浮游动物的运动。将对现场数据进行分析，以（1）解析潮汐混合锋面区域的三维环流和浮游动物种群场，（2）识别锋面上的收敛区域，（3）量化水和浮游动物的收敛速率和跨锋面交换，（4）量化锋面区域的纵贯和等密度混合速率，（5）研究浮游动物的游泳行为与层结、水流和垂直混合率等条件的关系。

U.S. GLOBEC: Water-Mass Exchange across the Tidal Mixing Front over Southern Georges Bank and Its Impact on Larval Fish and Zooplankton PopulationsThis project will focus on water mass exchange and mixing across the tidal mixing front over Georges Bank and the impact these processes have on larval fish and zooplankton populations. As part of the project, a series of field studies will be carried out in the region of the tidal mixing front over the northeast peak and southern flank during May-June 1999. These studies will include dye and drifter tracking as well as ADCP, CTD, and video plankton recorder (VPR) surveys. In addition, the investigators will use a diagnostic model to explore how differences in near-frontal motions and mixing rates influence larval and zooplankton movement. The field data will be analyzed to (1) resolve the 3-dimensional circulation and zooplankton population field in the region of the tidal mixing front, (2) to identify regions of convergence onto the front, (3) to quantify rates of convergence and cross-frontal exchange of both water and zooplankton, (4) to quantify diapycnal and isopycnal mixing rates in the frontal region, and (5) to examine zooplankton swimming behavior in relation to various conditions of stratification, flow, and vertical mixing rate.