SST Variations
Holocene SST reconstructions are more spatially complete durante the North Atlantic compared esatto other oceans, although still primarily limited puro high sediment-accumulation-rate, near-shore basins. Pioneering research seeking preciso identify per long-term trend mediante upper ocean temperatures focused on reconstructing SSTs for 9 and 6 ka, using planktonic foraminiferal assemblages ( Ruddiman and Mix, 1993 ). Calibration studies durante the 1950s and 1960s had demonstrated that excretion groupings of planktonic Foraminifera are highly correlated onesto SST, per adjonction puro salinity and water-column nutrients ( Morey et al., 2005 ). Ruddiman and Mix (1993) found per niente discernible pattern of past SST variability mediante the North Atlantic and questioned both the methodology used for quantitative reconstructions and the age control associated with variable sediment-accumulation rates.ادامه خواندن