Eastern Tropical Indian Ocean 133KYr Ocean Temperature Reconstructions Mohtadi, M.; Lückge, A.; Steinke, S.; Groeneveld, J.; Hebbeln, D.; Westphal, N. Mohtadi, M. Lückge, A. Steinke, S. Groeneveld, J. Hebbeln, D. Westphal, N. Sea Surface Temperature Reconstruction Warm Pool earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Globigerinoides ruber) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Neogloboquadrina dutertrei,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (sea water temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,thermocline temperature from N. dutertrei) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,Globigerinoides ruber,null,millimole per mole,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,Neogloboquadrina dutertrei,null,millimole per mole,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (GeoB10038-4>LATITUDE -5.9375>LONGITUDE 103.246) Surface and thermocline conditions of the eastern tropical Indian Ocean were reconstructed through the past glacial- interglacial cycle by using Mg/Ca and alkenone-paleothermometry, stable oxygen isotopes of calcite and seawater, and terrigenous fraction performed on sediment core GeoB 10038-4 off SW Sumatra (~6°S, 103°E, 1819 m water depth). Results show that annual mean surface and thermocline temperatures varied differently and independently, and suggest that surface temperatures have been responding to southern high-latitude climate, whereas the more variable thermocline temperatures were remotely controlled by changes in the thermocline temperatures of the North Indian Ocean. Except for glacial terminations, salinity proxies indicate that changing intensities of the boreal summer monsoon did not considerably affect annual mean conditions off Sumatra during the past 133,000 years. Our results do not show a glacial- interglacial pattern in the thermocline conditions and reject a linear response of the tropical Indian Ocean thermocline to mid- and high-latitude climate change. Alkenone-based surface temperature estimates varied in line with the terrigenous fraction of the sediment and the East Asian winter monsoon proxy records at the precession band suggestive of monsoon (sea level) to be the dominant control on alkenone temperatures in the eastern tropical Indian Ocean on sub-orbital (glacial- interglacial) timescales. STUDY NOTES: Foraminiferal oxygen isotope (d18O) and Mg/Ca data, alkenone (UK'37) concentration data, plus reconstructed surface and thermocline temperatures via Mg/Ca and alkenone calibrations for a Indo-Pacific Warm Pool core for the last 133,000 years. Foraminifer species include Cibicidoides wuellerstorfi, Globigerinoides ruber (sensu stricto), and Neogloboquadrina dutertrei. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Mohtadi, M. Investigator : Lückge, A. Investigator : Steinke, S. Investigator : Groeneveld, J. Investigator : Hebbeln, D. Investigator : Westphal, N. 2011-05-14 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11193 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mohtadi2010b/mohtadi2010b.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mohtadi2010b/mohtadi2010b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mohtadi2010b/mohtadi2010b.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mohtadi2010b/mohtadi2010b.txt English https://www.ncdc.noaa.gov/paleo/study/11193 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mohtadi2010b/mohtadi2010b.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mohtadi2010b/mohtadi2010b.txt Mohtadi, M., A. Lückge, S. Steinke, J. Groeneveld, D. Hebbeln, and N. Westphal. 2010. Late Pleistocene surface and thermocline conditions of the eastern tropical Indian Ocean. Quaternary Science Reviews, Vol. 29, Issues 7-8, April 2010, pp. 887-896. doi:10.1016/j.quascirev.2009.12.006 START YEAR: 131400 cal yr BP * END YEAR: 0 cal yr BP 103.246 -5.9375 103.246 -5.9375