noaa-ocean-9040 Indian Ocean Sea Surface Temperature Reconstruction for last 150,000 years Bard, E.; Rostek, F.; Sonzogni., C. Indian Ocean Sea Surface Temperature Reconstruction for last 150,000 years 2003-03-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/9040 Investigator E. Bard Investigator F. Rostek Investigator C. Sonzogni. earth science paleoclimate paleoceanography age,null,null,calendar year before present,null,paleoceanography,null,null,N,null 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 depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean reconstruction earth science paleoclimate paleocean age control geoscientificInformation Sea Surface Temperature Reconstruction 171400 cal yr BP 0 cal yr BP Complete -20.4 13.7 36.33 73.88 -4875 -1260 Ocean Indian Ocean MD85668>LATITUDE -.02>LONGITUDE 46.03 Ocean Indian Ocean MD79257>LATITUDE -20.4>LONGITUDE 36.33 Ocean Indian Ocean MD90963>LATITUDE 5.07>LONGITUDE 73.88 Ocean Indian Ocean MD85674>LATITUDE 3.18>LONGITUDE 50.43 Ocean Indian Ocean TY93-929/P>LATITUDE 13.7>LONGITUDE 53.25 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Bard, E., F. Rostek, and C. Sonzogni. 1997. Interhemispheric synchrony of the last deglaciation inferred from alkenone palaeothermometry. Nature 385, 707-710 Rostek, F., G. Ruhland, F. Bassinot, P.J. Mueller, L. Labeyrie, Y. Lancelot, and E. Bard. 1993. Reconstructing sea surface temperature and salinity using d18O and alkenone records. Nature, 364, 319-321. Rostek, F., E. Bard, L. Beaufort, C. Sonzogni, and G. Ganssen 1997 Deep Sea Research II 44 1461-1480

The relative timings of the last deglacial warming in the Southern and Northern hemispheres are not well constrained, but are a crucial component in understanding the mechanisms of deglaciation. A clearer picture of the degree of interhemispheric synchrony has been obscured by a dearth of high-resolution temperature records that can be tied to the absolute calendar timescale. Moreover, the quantification of tropical temperatures during the last glacial cycle is controversial. Here we apply the alkenone method of sea surface temperature reconstruction to several high-resolution sediment cores recovered from the tropical Indian Ocean between 20° N and 20° S. The inferred initial sea surface temperature warming ~15,000 calendar years ago at 20° S is in phase with Northern Hemisphere sea (this study) and air temperature changes, but lags Antarctic warming by several millennia. This finding, along with the results of recent modelling studies, provides strong support for the idea that changes in the ocean's global thermohaline circulation were not the only cause of interhemispheric climate teleconnection during the last deglaciation

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md85674-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m85668eb-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md79257-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/t21data/t93929-p-sytr-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bard1997 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/t21data/m85668eb-sytr-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/t21data/md85674-sytr-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/t93929-p-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/t21data/md79257-sytr-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md90963-tab.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11