Western Pacific Warm Pool Oxygen Isotope and Mg/Ca Data and SST Reconstruction during the Pleistocene Dyez, K.A.; Ravelo, A.C. Dyez, K.A. Ravelo, A.C. Sea Surface Temperature Reconstruction Warm Pool earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Using formula from Dyez and Ravelo(2013); Mg/Ca Globigerinoides ruber white) earth science/paleoclimate/paleoceanography (delta 18O,Uvigerina sp.,null,per mil VPDB,null,paleoceanography,null,null,N,250-355 µm) earth science/paleoclimate/paleoceanography (magnesium/calcium,Globigerinoides ruber white,null,millimole per mole,null,paleoceanography,null,null,N,250-355 µm) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP 871>LATITUDE 5.5572>LONGITUDE 172.3443) In the late Pleistocene, the atmospheric carbon dioxide concentration (pCO2) is thought to be a primary driving force for tropical sea surface temperature (SST) change because glacial-interglacial changes in tropical Pacific SST covary with pCO2. However, if the regional radiative effects of pCO2 were the only agent of change, tropical SST gradients should have remained similar as pCO2 varied with time. Instead, a new record of SST from the west Pacific shows that tropical SST gradients were different, even reversed, in the past, suggesting an important role for dynamical circulation changes. Specifically, changes in the temperature of upwelled source water, in addition to local pCO2 forcing, influenced tropical Pacific SST. These dynamical changes, rather than pCO2, may have shifted the background state of the tropics and even helped set the stage for the mid-Pleistocene transition. STUDY NOTES: These are data from the western Pacific warm pool, derived from sediments of Site 871, retrieved as part of ODP drilling. The dataset contains both oxygen isotopic values measured on benthic foraminifera and Mg/Ca values measured on planktic foraminifera. Included is the estimated sea surface temperature value, derived from planktic Mg/Ca. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Dyez, K.A. Investigator : Ravelo, A.C. 2015-02-20 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/18035 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/dyez2014-grl/dyez2014-grl.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/dyez2014-grl/dyez2014-grl.txt English https://www.ncdc.noaa.gov/paleo/study/18035 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/dyez2014-grl/dyez2014-grl.txt Dyez, K.A. and A.C. Ravelo2014Dynamical changes in the tropical Pacific warm pool and zonal SST gradient during the PleistoceneGeophysical Research Letters41217626-763310.1002/2014GL061639 START YEAR: 1412000 cal yr BP * END YEAR: 45000 cal yr BP 172.3443 5.5572 172.3443 5.5572