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- Publication.10.1016/j.orggeochem.2012.11.001 + (The oceans mediate the response of global … The oceans mediate the response of global climate to natural and anthropogenic forcings. Yet for the Common Era (past 2000 years) global ocean sea surface temperature (SST) variations, and the underlying driving mechanisms, are poorly constrained. Here we present a global synthesis of Common Era SSTs derived solely from marine archives. The synthesis uses 57 individual SST reconstructions that meet strict quality control criteria. We find an SST cooling trend during 0-1800 CE that is robust against explicit tests for potential biases in the reconstructions. The surface cooling trend for 801-1800 CE is qualitatively consistent with an independent synthesis of terrestrial temperature reconstructions, and with SST simulated by an ensemble of climate model simulations using best estimates of past forcings. Single and cumulative forcing climate model simulations suggest that the ocean SST cooling trend is not a response to orbital forcing, which is globally weak over this interval, but rather to increased frequency of explosive volcanism in recent centuries. This finding provides support for the hypothesis that ocean dynamics transform episodic volcanic forcing into a centennial and global-scale cooling trend.centennial and global-scale cooling trend.)
- Publication.10.1038/ngeo2510 + (The oceans mediate the response of global … The oceans mediate the response of global climate to natural and anthropogenic forcings. Yet for the Common Era (past 2000 years) global ocean sea surface temperature (SST) variations, and the underlying driving mechanisms, are poorly constrained. Here we present a global synthesis of Common Era SSTs derived solely from marine archives. The synthesis uses 57 individual SST reconstructions that meet strict quality control criteria. We find an SST cooling trend during 0-1800 CE that is robust against explicit tests for potential biases in the reconstructions. The surface cooling trend for 801-1800 CE is qualitatively consistent with an independent synthesis of terrestrial temperature reconstructions, and with SST simulated by an ensemble of climate model simulations using best estimates of past forcings. Single and cumulative forcing climate model simulations suggest that the ocean SST cooling trend is not a response to orbital forcing, which is globally weak over this interval, but rather to increased frequency of explosive volcanism in recent centuries. This finding provides support for the hypothesis that ocean dynamics transform episodic volcanic forcing into a centennial and global-scale cooling trend.centennial and global-scale cooling trend.)
