GLOBEC NEP: Satellite-Observed Ocean Climate Variability

GLOBEC NEP：卫星观测海洋气候变率项目将在时间上和范围上扩展在GLOBEC试点项目阶段（1997 - 2000年）开始的关于东北太平洋海洋气候变率的卫星数据开发和基于卫星的分析。总体的科学问题是表征和量化NEP中主要的变率模式，如卫星测量地表运输、温度和叶绿素模式所体现的。我们的分析利用加利福尼亚海流（CCS）和阿拉斯加沿海湾（CGOA）的GLOBEC目标研究区域的合并卫星数据产品，解决了多个时空尺度的问题。GLOBEC NEP实地研究需要空间和时间背景。该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，并将这种变异的变化与局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。pi将定义和量化a)小事件尺度的海岸特征，如锋面、涡流和辐合（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、沿海喷流、浮力羽流和涡旋（10公里至500公里）——这些也影响种群的运输和滞留；c)盆地和年际尺度（100 ~ 1万公里）的强迫和过程。第二个相关目标是量化两个研究区域季节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pi在这两个方面具有丰富的经验：1)获取、处理、子集、QC和存档NEP区域的多个尺度的卫星数据，并使这些数据以电子方式提供给项目中的其他人员；2)结合辅助数据对这些数据进行分析，以解决盆地-中尺度和近岸尺度的GLOBEC研究目标。核心数据集是高度计场，NOAA AVHRR和NASA SeaWiFS数据，分辨率分别为1公里和4公里，以及合成孔径雷达（SAR）图像。这些数据还补充了模型和浮标风、潮汐计海平面和现场数据。与进行实地测量的调查人员密切合作，将把卫星数据分析中确定的尺度和模式与现场三维过程联系起来。

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.