GLOBEC NEP: Satellite-Observed Ocean Climate Variability

GLOBEC NEP：卫星观测的海洋气候变化PIS将在时间和范围上扩展在GLOBEC试验项目阶段(1997-2000年)期间开始的开发卫星数据和对东北太平洋海洋气候变化的卫星分析。总体的科学问题是描述和量化卫星对地表传输、温度和叶绿素模式的测量所体现的NEP中的主要变化模式。我们的分析使用合并的卫星数据产品处理加州洋流(CCS)和阿拉斯加湾沿岸(CGOA)GLOBEC目标研究区域的多个空间和时间尺度。GLOBEC NEP野外研究需要空间和时间背景。这个项目的主要目标是量化每个过程研究地点的小尺度和中尺度环流模式的季节和年际变化程度，并将这种变化的变化与当地风和盆地尺度环流强迫强度的季节和年际变化联系起来。这一目标将通过利用卫星测量对时空尺度进行系统分析来实现。PIS将定义和量化1)小规模事件--沿海地物，如锋面、旋涡和汇合点(50米-100公里)。这些特征被认为对GLOBEC目标物种在当地的成功/生存至关重要，b)大陆架上的中尺度环流/季节变化、上升流锋面、沿海急流、浮羽和涡流(10公里-500公里)--这些也影响种群的迁移和保留；以及c)盆地和年际尺度(100公里-10 000公里)的强迫和过程。第二个相关的目标是量化两个研究地区季节性转变的时间和强度的变化。该项目的具体目标分为卫星海洋学的两个方面，三个PIS在这方面有丰富的经验：1)获取、处理、子集、质量控制和存档多个尺度的NEP区域的卫星数据，并将这些数据以电子方式提供给方案中的其他人；2)结合辅助数据分析这些数据，以满足GLOBEC在盆地-中尺度和近岸尺度的研究目标。核心数据集是高度场、L公里和4公里分辨率的NOAA AVHRR和NASA SeaWiFS数据以及合成孔径雷达(SAR)图像。这些数据还包括模型和浮标风、潮汐测量海平面和现场数据。与进行实地测量的调查人员密切合作，将卫星数据分析中确定的尺度和模式与三维现场进程联系起来。

GLOBEC NEP: Satellite-Observed Ocean Climate Variabili1yThe PIs will extend in time and expand in scope the satellite data development and satellite-based analyses of ocean climate variability in the Northeast Pacific (NEP), begun during the GLOBEC Pilot Project phase (1997 - 00). The overall scientific problem is to characterize and quantify the dominant modes of variability in the NEP as embodied by satellite measurements of surface transports, temperature and chlorophyll patterns. Our analyses address multiple spatial and temporal scales using merged satellite data products over GLOBEC target study regions in both the California Current (CCS) and the coastal Gulf of Alaska (CGOA).GLOBEC NEP field studies require both spatial and temporal context. The primary goal of this project is to quantify the degree of seasonal and interannual variability in small scale and mesoscale circulation patterns in each of the process study sites, and to relate changes in this variability to the seasonal and interannual changes in the strength of forcing by local winds and basin scale circulation. This goal will be accomplished through a systematic analysis of spatial temporal scales utilizing satellite measurements. The PIs will define and quantify a) small event-scale coastal features such as fronts, eddies and convergences (50 m - 100 km). These features are thought to be critical to local success/ survival of GLOBEC target species, b) mesoscale circulation / seasonal variability over the shelf, upwelling fronts, coastal jets, buoyant plumes and eddies (10 km - 500 km) - these also affect transport and retention of populations; and c) forcing and processes at basin and interannual scales (100 km - 10,000 km). A second, related goal is to quantify changes in the timing and strength of seasonal transitions in both study regions. Specific objectives of the project are divided into two aspects of satellite oceanography, with which the three PIs have extensive experience: 1) Acquire, process, subset, QC, and archive satellite data in the NEP region at multiple scales and make these data electronically available to others in the program; 2) analyze these data, in conjunction with ancillary data, to address GLOBEC research goals at basin- meso- and nearshore scales. The core data sets are altimeter fields, NOAA AVHRR and NASA SeaWiFS data at both l km and 4 km resolution and synthetic aperture radar (SAR) imagery. These are supplemented with model and buoy winds, tide gauge sea levels and in situ data. Close collaboration with investigators carrying out field measurements will link scales and patterns determined in the satellite data analyses to 3D in situ processes.