Eastern Arabian Sea 4,700 Year Mg/Ca-d18O Data and SST/SSS Reconstructions Tiwari, M.; Nagoji, S.S.; Ganeshram, R.S. Tiwari, M. Nagoji, S.S. Ganeshram, R.S. Monsoon Sea Surface Temperature Reconstruction 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 earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (SN-6>LATITUDE 12.486>LONGITUDE 74.133) 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. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Tiwari, M. Investigator : Nagoji, S.S. Investigator : Ganeshram, R.S. 2015-06-26 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/18919 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tiwari2015/tiwari2015.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tiwari2015/tiwari2015.txt English https://www.ncdc.noaa.gov/paleo/study/18919 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tiwari2015/tiwari2015.txt Manish Tiwari, Siddhesh S. Nagoji, and Raja S. Ganeshram 2015Multi-centennial scale SST and Indian summer monsoon precipitation variability since mid-Holocene and its nonlinear response to solar activityThe Holocene10.1177/0959683615585840http://hol.sagepub.com/content/early/2015/05/22/0959683615585840.abstract START YEAR: 4772 cal yr BP * END YEAR: 154 cal yr BP 74.133 12.486 74.133 12.486