Is the thermohaline circulation changing?
2006
Latif, Mojib | Böning, Claus W. | Willebrand, Jürgen | Biastoch, Arne | Dengg, Joachim | Keenlyside, Noel | Schweckendiek, Ulf | Madec, G.
Analyses of ocean observations and model simulations suggest that there have been considerable changesin the thermohaline circulation (THC) during the last century. These changes are likely to be the result ofnatural multidecadal climate variability and are driven by low-frequency variations of the North AtlanticOscillation (NAO) through changes in Labrador Sea convection. Indications of a sustained THC weakeningare not seen during the last few decades. Instead, a strengthening since the 1980s is observed. The combinedassessment of ocean hydrography data and model results indicates that the expected anthropogenic weakeningof the THC will remain within the range of natural variability during the next several decades.
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