GLOBEC: Collaborative Research: Mesoscale and Finescale Mapping of Physical and Biological Fields in the Northern California Current System

GLOBEC合作研究：加利福尼亚州北部海流系统中物理和生物场的中尺度和精细绘制该项目将研究影响俄勒冈州/加利福尼亚州海岸鲑鱼幼体栖息地的中尺度物理和生物海洋学分布和过程。PIS将在一系列空间尺度上描述与上升流锋面和沿海急流有关的环流模式，特别是对布兰科角等沿海海角的反应。将结合春季和夏末沿海系统内浮游植物和浮游动物生物量和物种的保留和/或丧失情况对这些模式进行评估。将使用仪表化、拖曳、起伏的交通工具(SeaSoar)绘制5-30公里空间尺度上的物理和生物分布图。SeaSoar将配备适当的传感器/仪器，以测量从纽波特或到加利福尼亚州尤里卡的中尺度区域的物理场(电导率、温度、深度)、浮游植物和生物光学参数(多波长荧光仪和多波长吸收计)、桡足类和小型浮游动物(光学浮游生物计数器)以及大型浮游动物和鱼类(HTI声学系统)。此外，还将进行持续的在航面采样和沿途声学多普勒水流剖面(ADCP)的水运。紧跟在每一次中尺度调查之后，将对离岸约50公里、沿海约80公里的区域进行一系列相互关联的精细比例尺测绘，随后将进行面向过程的实地研究。由于加州洋流的主要急流在布兰科角发生离岸转换，导致开普敦北部和南部的物理和生物状况截然不同，不同的采样区预计将显示出截然不同的幼体鲑鱼栖息地特性。

GLOBEC Collaborative Research: Mesoscale and Finescale Mapping of Physical and Biological Fields in the Northern California Current systemThis project will address the mesoscale physical and biological oceanographic distributions and processes that influence juvenile salmonid habitat along the Oregon/California coast. The PIs will characterize, across a range of spatial scales, the circulation patterns associated with upwelling fronts and coastal jets, particularly in response to coastal promontories such as Cape Blanco. These patterns will be evaluated in the context of the retention and/or loss of phytoplankton and zooplankton biomass and species within the coastal system in both spring and late summer. An instrumented, towed, undulating vehicle (a SeaSoar) will be used to map physical and biological distributions over spatial scales of 5-30 km. The SeaSoar will be equipped with appropriate sensors/instrumentation to measure physical fields (conductivity, temperature, depth), phytoplankton and bio-optical parameters (multiwavelength fluorometers and multi-wavelength absorption meters), copepod and small euphausiid mesozooplankton (Optical Plankton Counter), and large euphausiids and fish (HTI Acoustics system) for the mesoscale region extending from Newport, OR to Eureka, CA. In addition, there will be continuous underway surface sampling and along-track Acoustic Doppler Current Profiling (ADCP) of water transport. Immediately following each mesoscale survey will be a sequence of interconnected finescale mapping surveys of a region ca. 50 km offshore by 80 km along-shore, followed by process-oriented field studies. The different sampling regions are expected to display contrasting juvenile salmonid habitat properties due to the offshore transition of the main jet of the California Current at Cape Blanco which results in distinctly different physical and biological regimes north and south of the Cape.