noaa-ocean-18919 Eastern Arabian Sea 4,700 Year Mg/Ca-d18O Data and SST/SSS Reconstructions Tiwari, M.; Nagoji, S.S.; Ganeshram, R.S. Eastern Arabian Sea 4,700 Year Mg/Ca-d18O Data and SST/SSS Reconstructions 2015-06-26 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18919 Investigator M. Tiwari Investigator S.S. Nagoji Investigator R.S. Ganeshram earth science paleoclimate climate reconstructions|paleoceanography delta 18O,delta 18O|magnesium/calcium|sea water,null,per mil PDB,null,climate reconstructions|paleoceanography,null,null,N,G.ruber white ss earth science paleoclimate paleoceanography age,null,null,calendar year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Orbulina universa,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Foraminiferal tests 250-420um from marine sediments; G. ruber white earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,G.ruber white ss Mg/Ca earth science paleoclimate paleoceanography magnesium/calcium,Cibicidoides sp.,null,millimole per mole,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy,N,Foraminiferal tests 250-420um from marine sediments; G. ruber white earth science paleoclimate climate reconstructions|paleoceanography salinity,delta 18O|magnesium/calcium|sea surface,null,parts per thousand,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 geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation Monsoon Sea Surface Temperature Reconstruction 4772 cal yr BP 154 cal yr BP Complete 12.486 12.486 74.133 74.133 -589 -589 Ocean Indian Ocean Arabian Sea SN-6>LATITUDE 12.486>LONGITUDE 74.133 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 Manish Tiwari, Siddhesh S. Nagoji, and Raja S. Ganeshram 2015 The Holocene 10.1177/0959683615585840 http://hol.sagepub.com/content/early/2015/05/22/0959683615585840.abstract

Indian Summer Monsoon (ISM) shows a weak correlation with solar variability in the 20th century. However, such climatological observations on solar activity-monsoon relationship are very short and hence uncertain. A few paleomonsoon records also exhibit prominent correspondence with solar activity during early Holocene and beyond. But despite the strong recent solar minima (e.g. Maunder, Sporer, Oort, Wolf), their correlation with monsoon precipitation is weak and inconclusive. Additionally, many of the earlier studies have been from the western Arabian Sea that provides records of the ISM wind intensity instead of the ISM precipitation. We present here mid-Holocene to recent sea surface temperature (SST) reconstructed from Mg/Ca measurements of planktic foraminifera (Globigerinoides ruber; white, sensu stricto) on a centennial-scale resolution from the southeastern Arabian. These measurements are used to correct the oxygen isotope ratios of G. ruber to reconstruct salinity related to monsoon runoff in this region more precisely than hitherto. The long-term trend indicates that the ISM precipitation has declined since the mid-Holocene similar to the solar activity. On shorter multi-centennial timescale, we show that the ISM precipitation declined concurrently with the recent periods of strong solar minima, but lagged by a couple of hundred years beyond 1300 yr BP toward the mid-Holocene - confirmed statistically using wavelet analysis. This nonstationary phase relationship between the ISM and the solar activity indicates the possible influence of the tropical coupled ocean-atmosphere phenomenon. STUDY NOTES: High-resolution (centennial to bi-centennial scale) SST and salinity data from the eastern Arabian Sea since mid-Holocene, based on foraminiferal Mg/Ca and d18O data.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tiwari2015/tiwari2015.txt Data File; SN-6 Mg/Ca-d18O Data and SST/SSS Reconstructions USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11