noaa-ocean-17575 Northern Indian Ocean SST Reconstruction and Oxygen Isotope, Ba/Ca and Geochemistry Data for last 31,000 Years Saraswat, R.; Lea, D.W.; Nigam, R.; Mackensen, A.; Naik, D.K. Northern Indian Ocean SST Reconstruction and Oxygen Isotope, Ba/Ca and Geochemistry Data for last 31,000 Years 2014-12-14 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17575 Investigator R. Saraswat Investigator D.W. Lea Investigator R. Nigam Investigator A. Mackensen Investigator D.K. Naik earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Mg/Ca G. ruber using Dekens 2002 earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globigerinoides ruber white,null,millimole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null earth science paleoclimate paleoceanography delta 18O,Globigerinoides ruber white,null,per mil VPDB,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null earth science paleoclimate paleoceanography barium/calcium,Globigerinoides ruber white,null,micromole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null earth science paleoclimate climate reconstructions|paleoceanography delta 18O,delta 18O|magnesium/calcium|sea water,null,per mil VPDB,null,climate reconstructions|paleoceanography,null,null,N,Calculated from delta 18Oforam - SST contribution using G. ruber white earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation Sea Surface Temperature Reconstruction Younger Dryas 31600 cal yr BP 120 cal yr BP Complete 10.9775 10.9775 74.999333 74.999333 -1245 -1245 Ocean Indian Ocean Arabian Sea SK237-GC04>LATITUDE 10.9775>LONGITUDE 74.999333 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 Saraswat, R., D.W. Lea, R. Nigam, A. Mackensen, and D.K. Naik 2013 Earth and Planetary Science Letters 375 166-175 10.1016/j.epsl.2013.05.022

High resolution climate records of the ice age terminations from monsoon-dominated regions reveal the interplay of regional and global driving forces. Speleothem records from Chinese caves indicate that glacial terminations were interrupted by prominent weak monsoon intervals (WMI), lasting a few thousand years. Deglacial WMIs are interpreted as the result of cold temperature anomalies generated by sea ice feedbacks in the North Atlantic, most prominently during Heinrich Events. Recent modelling results suggest, however, that WMIs reflect changes in the intensity of the Indian rather than the East Asian monsoon. Here we use foraminiferal trace element (Mg/Ca and Ba/Ca) and stable isotope records from a sediment core off the Malabar coast in the southeastern Arabian Sea with centennial-scale resolution to test this hypothesis and to constrain the nature and timing of deglacial climate change in the tropical Indian Ocean. The Malabar deglacial SST record is unique in character and different from other tropical climate records. SST at the Last Glacial Maximum was 2.7±0.5 °C colder than pre-industrial SST. Deglacial warming started at 18.6 (95% CI range 18.8-18.1) kyr BP, within error of the onset of warming at other tropical sites as well as in Antarctica and the Southern Ocean and either coeval with or up to 1 kyr before the atmospheric CO2 rise. Warming took place in two steps separated by an interval of stable SST between 15.7 (16.2-14.9) and 13.2 (13.9-12.0) kyr BP. The d18O-water record and the Ba/Ca record, which is a measure of Indian sub-continent riverine runoff, indicate that the last ice age termination was marked by a prominent weak Indian Monsoon interval interrupted by an intense monsoon phase, as seen in speleothem records and predicted by modelling. A strong correspondence between the timing of the Malabar d18Osw record and the Hulu Cave monsoon record suggests that deglacial d18O changes in both localities dominantly reflect compositional changes in precipitation, likely driven by changes in the North Atlantic. STUDY NOTES: Centennial scale seawater temperature and runoff record covering the last deglacialtion in the northern Indian Ocean Provided Keywords: Holocene, Younger Dryas, glacial

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/saraswat2013/saraswat2013-sk237gc04.txt Formatted Text File; SK237-GC04 Data USA/NOAA DIF Version 9.8.4 2019-02-12 2019-02-12