Southwest Pacific ODP1123 Mid-Pleistocene Transition Foraminiferal SST Data Crundwell, M.P.; Scott, G.; Naish, T.; Carter, L. Crundwell, M.P. Scott, G. Naish, T. Carter, L. Sea Surface Temperature Reconstruction earth science/paleoclimate/paleoceanography (total sponge spicules,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Turborotalita humilis) earth science/paleoclimate/paleoceanography (Trilobatus sacculifer,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (pyrite,sediment,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (total radiolarians,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Truncorotalia crassula) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Globigerinella calida; Unaccepted name: Globigerina calida) earth science/paleoclimate/paleoceanography (Globorotalia inflata,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (fish index,null,null,count,null,paleoceanography,null,null,N,fish teeth) earth science/paleoclimate/paleoceanography (total benthic foraminifers,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Sphaeroidinella dehiscens) earth science/paleoclimate/paleoceanography (Globorotalia truncatulinoides,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (volcanic material,null,null,count,null,paleoceanography,null,null,N,Glass shards/pumice) earth science/paleoclimate/paleoceanography (identified brachiopod,null,null,count,null,paleoceanography,null,null,N,Hirsutella hirsuta) earth science/paleoclimate/paleoceanography (total ostracods,null,null,count,null,paleoceanography,null,null,N,ostracods) earth science/paleoclimate/paleoceanography (Pulleniatina obliquiloculata,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (Globorotalia truncatulinoides,null,null,count,null,paleoceanography,null,null,N,left coiling) earth science/paleoclimate/paleoceanography (age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (Globigerina bulloides,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Globigerinita glutinata) earth science/paleoclimate/paleoceanography (Globigerinoides ruber,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (Neogloboquadrina incompta,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (Neogloboquadrina pachyderma,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (total planktic foraminifers,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (Globigerinella siphonifera,null,null,count,null,paleoceanography,null,null,N,Unaccepted name: Globigerinella aequilateralis) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,null,null,degree Celsius,null,climate reconstructions|paleoceanography,null,artificial neural network,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Globigerina falconensis) earth science/paleoclimate/paleoceanography (foraminifer fragmentation,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (foraminifer fragmentation,null,null,percent,null,paleoceanography,null,null,N,planktic foraminifera) earth science/paleoclimate/paleoceanography (Orbulina universa,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Turborotalita quinqueloba) earth science/paleoclimate/paleoceanography (Globorotalia truncatulinoides,null,null,count,null,paleoceanography,null,null,N,right coiling) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count,null,paleoceanography,null,null,N,Beella digitata) earth science/paleoclimate/paleoceanography (echinoid index,null,null,count,null,paleoceanography,null,null,N,echinoids) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP1123>LATITUDE -41.78>LONGITUDE -171.5) Planktonic foraminiferal assemblages and artificial neural network estimates of sea-surface temperature (SST) at ODP Site 1123 (41°47.2'S, 171°29.9'W; 3290 m deep), east of New Zealand, reveal a high-resolution history of glacialŋinterglacial (GŋI) variability at the Subtropical Front (STF) for the last 1.2 million years, including the Mid-Pleistocene climate transition (MPT). Most GŋI cycles of ~ 100 kyr duration have short periods of cold glacial and warm deglacial climate centred on glacial terminations, followed by long temperate interglacial periods. During glacialŋdeglacial transitions, maximum abundances of subantarctic and subtropical taxa coincide with SST minima and maxima, and lead ice volume by up to 8 kyrs. Such relationships reflect the competing influence of subantarctic and subtropical surface inflows during glacial and deglacial periods, respectively, suggesting alternate polar and tropical forcing of southern mid-latitude ocean climate. The lead of SSTs and subtropical inflow over ice volume points to tropical forcing of southern mid-latitude ocean-climate during deglacial warming. This contrasts with the established hypothesis that southern hemisphere ocean climate is driven by the influence of continental glaciations.Based on wholesale changes in subantarctic and subtropical faunas, the last 1.2 million years are subdivided into 4-distinct periods of ocean climate. 1) The pre-MPT (1185ŋ870 ka) has high amplitude 41-kyr fluctuations in SST, superimposed on a general cooling trend and heightened productivity, reflecting long-term strengthening of subantarctic inflow under an invigorated Antarctic Circumpolar Current. 2) The early MPT (870ŋ620 ka) is marked by abrupt warming during MIS 21, followed by a period of unstable periodicities within the 40ŋ100 kyr orbital bands, decreasing SST amplitudes, and long intervals of temperate interglacial climate punctuated by short glacial and deglacial phases, reflecting lower meridional temperature gradients. 3) The late MPT (620ŋ435 ka) encompasses an abrupt decrease in the subantarctic inflow during MIS 15, followed by a period of warm equable climate. Poorly defined, low amplitude GŋI variations in SSTs during this interval are consistent with a relatively stable STF and evenly balanced subantarctic and subtropical inflows, possibly in response to smaller, less dynamic polar icesheets. 4) The post-MPT (435ŋ0 ka) is marked by a major climatic deterioration during MIS 12, and a return to higher amplitude 100 kyr-frequency SST variations, superimposed on a long term trend towards cooler SSTs and increased mixed-layer productivity as the subantarctic inflow strengthened and polar icesheets expanded. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Crundwell, M.P. Investigator : Scott, G. Investigator : Naish, T. Investigator : Carter, L. 2008-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/6416 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1123-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/crundwell2008 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1123-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/crundwell2008 English https://www.ncdc.noaa.gov/paleo/study/6416 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1123-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/crundwell2008 Crundwell, M., G. Scott, T. Naish, and L. Carter. 2008. Glacial-interglacial ocean climate variability from planktonic foraminifera during the Mid-Pleistocene transition in the temperate Southwest Pacific, ODP Site 1123. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(1-2), 202-229. START YEAR: 1185500 14C yr BP * END YEAR: 630 14C yr BP -171.5 -41.78 -171.5 -41.78