Assessing recent warming using instrumentally homogeneous sea surface temperature records
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Date
2017
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Sea surface temperature (SST) records are subject to potential biases due to changing instrumentation andmeasurement practices. Significant differences exist between commonly used composite SST reconstructionsfrom the National Oceanic and Atmospheric Administration’s Extended Reconstruction Sea Surface Temperature(ERSST), the Hadley Centre SST data set (HadSST3), and the Japanese Meteorological Agency’s CentennialObservation-Based Estimates of SSTs (COBE-SST) from 2003 to the present. The update from ERSST version 3bto version 4 resulted in an increase in the operational SST trend estimate during the last 19 years from 0.07° to0.12°C per decade, indicating a higher rate of warming in recent years. We show that ERSST version 4 trendsgenerally agree with largely independent, near-global, and instrumentally homogeneous SST measurementsfrom floating buoys, Argo floats, and radiometer-based satellite measurements that have been developedand deployed during the past two decades. We find a large cooling bias in ERSST version 3b and smallerbut significant cooling biases in HadSST3 and COBE-SST from 2003 to the present, with respect to most seriesexamined. These results suggest that reported rates of SST warming in recent years have been underestimated in these three data sets.Journal
Science AdvancesVolume
3Issue/Article Nr
1Page Range
1-13ae974a485f413a2113503eed53cd6c53
10.1126/sciadv.1601207
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