BLUElink Global Australian Multi-Sensor SST Analysis (GAMSSA), daily, 1/4 degree resolution for 2016-05-12 (NCEI Accession 0153652)

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.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，由澳大利亚气象局基于业务化运行模式每日生成，采用最优插值法（Optimal Interpolation, OI）在全球0.25°网格上完成计算。本BLUELink全球澳大利亚多传感器海表温度分析（Global Australian Multi-Sensor SST Analysis, GAMSSA）v1.0系统，融合了来自先进甚高分辨率辐射计（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）的卫星海表温度观测数据，同时整合了全球电信系统（Global Telecommunications System, GTS）获取的船舶、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Donlon等人2002年提出的表层至基础温度转换算法，将AATSR获取的表层海表温度（skin SST）数据流转换为基础海表温度。这些基于经验推导的算法会根据表面风速对冷表层效应（cool-skin effect）施加小幅校正，并通过排除近期日间地表风速低于6 m·s⁻¹、夜间低于2 m·s⁻¹的案例，过滤掉疑似受日增温效应影响的海表温度数值。