BLUElink Global Australian Multi-Sensor SST Analysis (GAMSSA), daily, 1/4 degree resolution for 2016-09-12 (NCEI Accession 0158223)

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（Australian Bureau of Meteorology）基于最优插值（optimal interpolation, OI）算法，在全球0.25度网格上每日业务化生成。该BLUELink全球澳大利亚多传感器海表温度分析（BLUELink Global Australian Multi-Sensor SST Analysis, GAMSSA）v1.0系统融合了来自甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）、先进沿轨扫描辐射计（Advanced Along Track Scanning Radiometer, AATSR）以及地球观测系统先进微波扫描辐射计（Advanced Microwave Scanning Radiometer-EOS, AMSRE）的卫星海表温度观测数据，同时整合了来自全球电信系统（Global Telecommunications System, GTS）的船舶、漂流浮标与锚泊浮标原位观测数据。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）到基础海表温度转换算法，将AATSR获取的表皮海表温度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地表风速对冷表皮效应（cool-skin effect）施加小幅校正，并通过排除特定时段的异常样本以滤除受日增温效应（diurnal warming）影响的海表温度值：具体规则为日间排除近地表风速低于6 m·s⁻¹的案例，夜间排除近地表风速低于2 m·s⁻¹的案例。