BLUElink Global Australian Multi-Sensor SST Analysis (GAMSSA), daily, 1/4 degree resolution for 2016-09-19 (NCEI Accession 0158174)

A Group for High Resolution Sea Surface Temperature (GHRSST) Level 4 sea surface temperature analysis produced daily on an operational basis at the Australian Bureau of Meteorology using optimal interpolation (OI) on a global 0.25 degree grid. This BLUELink Global Australian Multi-Sensor SST Analysis (GAMSSA) v1.0 system blends satellite SST observations from the Advanced Very High Resolution Radiometer (AVHRR), the Advanced Along Track Scanning Radiometer (AATSR), and, the Advanced Microwave Scanning Radiometer-EOS (AMSRE), and in situ data from ships, and drifting and moored buoy from the Global Telecommunications System (GTS). In order to produce a foundation SST estimate, the AATSR skin SST data stream is converted to foundation SST using the Donlon et al. (2002) skin to foundation temperature conversion algorithms. These empirically-derived algorithms apply a small correction for the cool-skin effect depending on surface wind speed, and filter out SST values suspected to be affected by diurnal warming by excluding cases which have experienced recent surface wind speeds of below 6 ms-1 during the day and less than 2 ms-1 during the night.

本数据集为高分辨率海表温度工作组（Group for High Resolution Sea Surface Temperature, GHRSST）四级海表温度分析产品，由澳大利亚气象局每日业务化生产，采用最优插值法（optimal interpolation, OI）在全球0.25°网格上完成计算。该BLUELink全球澳大利亚多传感器海表温度分析（GAMSSA）v1.0系统，融合了甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）、先进沿轨扫描辐射计（Advanced Along Track Scanning Radiometer, AATSR）以及先进微波扫描辐射计-地球观测系统（Advanced Microwave Scanning Radiometer-EOS, AMSRE）获取的卫星海表温度观测数据，同时纳入全球电信系统（Global Telecommunications System, GTS）传输的船舶、漂流浮标与锚定浮标的原位观测数据。为生成基础海表温度（foundation SST）估算结果，研究团队采用唐隆等（Donlon et al., 2002）提出的表层至基础海表温度转换算法，将AATSR的表层海表温度数据流转换为基础海表温度。这类经验推导算法会根据表面风速对冷表层效应施加小幅校正，并通过排除日间近期表面风速低于6米每秒、夜间低于2米每秒的案例，过滤掉疑似受日间增温影响的海表温度数值。