BLUElink Global Australian Multi-Sensor SST Analysis (GAMSSA), daily, 1/4 degree resolution for 2016-07-20 (NCEI Accession 0158648)

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.

本数据集为澳大利亚气象局依托业务化运行流程每日产出的高分辨率海表面温度工作组（Group for High Resolution Sea Surface Temperature, GHRSST）四级海表温度分析产品，采用最优插值（optimal interpolation, OI）方法，在全球0.25度网格上开展计算。该BLUELink全球澳大利亚多传感器海表温度分析（GAMSSA）v1.0系统融合了多源观测数据：包括甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）、先进沿轨扫描辐射计（Advanced Along Track Scanning Radiometer, AATSR）、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，以及来自全球电信系统（Global Telecommunications System, GTS）的船舶、漂流浮标与锚定浮标原位观测数据。为生成基础海表温度（foundation SST）估算结果，研究团队采用唐隆等人（Donlon et al., 2002）提出的表皮海表温度（skin SST）转换为基础海表温度的算法，对AATSR的表皮海表温度数据流进行标准化转换。上述经验性算法会依据地表风速对冷表皮效应施加小幅校正，同时通过筛除日间近地表风速低于6 m·s⁻¹、夜间低于2 m·s⁻¹的观测案例，过滤掉疑似受日增温现象干扰的海表温度数值。