TY - JOUR
AU - P.P.E. Weaver
AU - M. Chapman
AU - G. Eglinton
AU - M. Zhao
AU - D. Rutledge
AU - G. Read
AB - We present data for North Atlantic core Biogeochemical Ocean Flux Study (BOFS) 16K (59\textdegreeN, 23\textdegreeW, water depth 2370 m) including coccolith flora, ∂<sup>18</sup>O, planktonic foraminiferal sea surface temperatures (SSTs) by FA20 and SIMMAX methods, and alkenone-based U<sub>37</sub><sup>K</sup> and U<sub>37</sub><sup>K </sup> SSTs. A good correlation exists between the abundances of cold water coccolith species and foraminifera, and a broad correlation exists between coccolith and alkenone abundances except in the Holocene. Reworked Cretaceous coccoliths at the Last Glacial Maximum are coincident with warm deviations of the U<sub>37</sub><sup>K </sup> signal. Assessment of various calibrations of U<sub>37</sub><sup>K</sup> and U<sub>37</sub><sup>K </sup> with paleotemperature shows the inappropriateness of a global correlation. We have produced a North Atlantic U<sub>37</sub><sup>K </sup> calibration on the basis of North Atlantic data alone (U<sub>37</sub><sup>K </sup>=0.026<i>T</i>+0.186), which produces SST data for summer season at 0 m water depth, comparable to the warm season foraminiferal SSTs, except during the intervals 26\textendash36, 58\textendash65, and 100\textendash120 ka when the alkenones indicate somewhat cooler surface waters.
BT - Paleoceanography
M1 - 3
N2 - We present data for North Atlantic core Biogeochemical Ocean Flux Study (BOFS) 16K (59\textdegreeN, 23\textdegreeW, water depth 2370 m) including coccolith flora, ∂<sup>18</sup>O, planktonic foraminiferal sea surface temperatures (SSTs) by FA20 and SIMMAX methods, and alkenone-based U<sub>37</sub><sup>K</sup> and U<sub>37</sub><sup>K </sup> SSTs. A good correlation exists between the abundances of cold water coccolith species and foraminifera, and a broad correlation exists between coccolith and alkenone abundances except in the Holocene. Reworked Cretaceous coccoliths at the Last Glacial Maximum are coincident with warm deviations of the U<sub>37</sub><sup>K </sup> signal. Assessment of various calibrations of U<sub>37</sub><sup>K</sup> and U<sub>37</sub><sup>K </sup> with paleotemperature shows the inappropriateness of a global correlation. We have produced a North Atlantic U<sub>37</sub><sup>K </sup> calibration on the basis of North Atlantic data alone (U<sub>37</sub><sup>K </sup>=0.026<i>T</i>+0.186), which produces SST data for summer season at 0 m water depth, comparable to the warm season foraminiferal SSTs, except during the intervals 26\textendash36, 58\textendash65, and 100\textendash120 ka when the alkenones indicate somewhat cooler surface waters.
PB - AGU
PY - 1999
SN - 0883-8305
SP - 336
EP - 349
T2 - Paleoceanography
TI - Combined Coccolith, Foraminiferal, and Biomarker Reconstruction of Paleoceanographic Conditions Over the Past 120 kyr in the Northern North Atlantic (59\textdegreeN, 23\textdegreeW)
UR - http://dx.doi.org/10.1029/1999PA900009
VL - 14
ER -