Decadal Ocean Heat Redistribution Since the Late 1990s and Its Association with Key Climate Modes

摘要: Ocean heat content (OHC) is the major component of earth’s energy imbalance. Its decadal scale variability has been heavily debated in research interest so-called “surface warming slowdown” (SWS) that occurred during 1998–2013 period. Here, we first clarify OHC accelerated since late 1990s. This finding refutes concept a slowdown human-induced global warming. study also addresses question how redistributed within ocean and provides some explanation underlying physical phenomena. Previous efforts to answer this end with contradictory conclusions; show systematic errors datasets are partly responsible for these contradictions. Using an improved product, three-dimensional changes SWS period depicted, related reference 1982–1997. Several “hot spots” “cold identified, showing significant decadal-scale redistribution heat, which distinct from long-term ocean-warming pattern. To provide clues potential drivers period, examine key climate modes by regressing Pacific Decadal Oscillation (PDO), El Nino-Southern (ENSO), Atlantic Multi-decadal (AMO) indices onto de-trended gridded anomalies. We find no single mode can fully explain change patterns suggesting there not “pacemaker” recent SWS. Our observation-based analyses basis further understanding mechanisms uptake evaluating models.