# Eastern Tropical Indian Ocean d18O, Mg/Ca and SST Reconstruction Data during the last 40,000 years #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/26210 # Description: NOAA Landing Page # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/setiawan2015/setiawan2015-gb10043-3.txt # Description: NOAA location of the template # # Data_Type: Paleoceanography # # Dataset_DOI: # # Parameter_Keywords: oxygen isotopes, trace metals in carbonates, reconstruction #--------------------------------------- # Contribution_Date # Date: 2019-02-15 #--------------------------------------- # File_Last_Modified_Date # Date: 2019-02-15 #--------------------------------------- # Title # Study_Name: Eastern Tropical Indian Ocean d18O, Mg/Ca and SST Reconstruction Data during the last 40,000 years #--------------------------------------- # Investigators # Investigators: Setiawan, R.Y.; Mohtadi, M.; Southon, J.; Groeneveld, J.; Steinke, S.; Hebbeln, D. #--------------------------------------- # Description_Notes_and_Keywords # Description: #--------------------------------------- # Publication # Authors: Setiawan, R.Y., M. Mohtadi, J. Southon, J. Groeneveld, S. Steinke, and D. Hebbeln # Published_Date_or_Year: 2015 # Published_Title: The consequences of opening the Sunda Strait on the hydrography of the eastern tropical Indian Ocean # Journal_Name: Paleoceanography # Volume: 30 # Edition: # Issue: 10 # Pages: 1358-1372 # Report_Number: # DOI: 10.1002/2015PA002802 # Online_Resource: # Full_Citation: # Abstract: The advection of relatively fresh Java Sea water through the Sunda Strait is presently responsible for the low-salinity "tongue" in the eastern tropical Indian Ocean with salinities as low as 32‰. The evolution of the hydrologic conditions in the eastern tropical Indian Ocean since the last glacial period, when the Sunda shelf was exposed and any advection via the Sunda Strait was cutoff, and the degree to which these conditions were affected by the Sunda Strait opening are not known. Here we have analyzed two sediment cores (GeoB 10042–1 and GeoB 10043–3) collected from the eastern tropical Indian Ocean off the Sunda Strait that cover the past ~40,000 years. We investigate the magnitude of terrigenous supply, sea surface temperature (SST), and seawater δ18O (δ18Osw) changes related to the sea level‐driven opening of the Sunda Strait. Our new spliced records off the Sunda Strait show that during the last glacial, average SST was cooler and δ18Osw was higher than elsewhere in the eastern tropical Indian Ocean. Seawater δ18O decreased ~0.5‰ after the opening of the Sunda Strait at ~10 kyr B.P. accompanied by an SST increase of 1.7°C. We suggest that fresher sea surface conditions have persisted ever since due to a continuous transport of low‐salinity Java Sea water into the eastern tropical Indian Ocean via the Sunda Strait that additionally increased marine productivity through the concomitant increase in terrigenous supply. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: # Grant: #--------------------------------------- # Site_Information # Site_Name: GeoB10043-3 # Location: Indian Ocean # Country: # Northernmost_Latitude: -7.3095 # Southernmost_Latitude: -7.3095 # Easternmost_Longitude: 105.058833 # Westernmost_Longitude: 105.058833 # Elevation: -2171 #--------------------------------------- # Data_Collection # Collection_Name: GeoB10043-3 Setiawan2015 # First_Year: 33627 # Last_Year: 210 # Time_Unit: cal yr BP # Core_Length: # Notes: #--------------------------------------- # Chronology_Information # Chronology: # GeoB 10043-3 # 89142 13 545 35 84 59 G.ruber, G.sacculifer 1 # 89143 18 640 35 177 70 G.ruber, G.sacculifer 1 # 98502 23 1150 25 627 37 G.sacculifer 1 # 98506 28 1570 35 1029 62 G.ruber 1 # 98508 33 2070 25 1539 65 G.sacculifer 1 # 98510 38 2240 15 1741 59 G.sacculifer 1 # 98518 43 2525 30 2076 71 G.sacculifer 1 # 98520 48 2760 30 2370 65 G.sacculifer 1 # 103701 150 6520 20 6914 64 G.ruber, G.sacculifer 2 # 103702 200 8330 70 8769 129 G.ruber, G.sacculifer 2 # 103703 223 9140 90 9767 158 G.ruber, G.sacculifer 2 # 127998 273 13265 35 15215 78 G.ruber, G.sacculifer 2 # 103705 300 15235 50 17937 95 G.ruber, G.sacculifer 2 # 127999 328 19280 45 22632 106 G.ruber, G.sacculifer 2 # 103706 367 29740 490 33321 106 G.ruber, G.sacculifer 2 # 103707 385 31140 240 34580 233 G.ruber, G.sacculifer 2 # References: (1) Southon et al. [2013]; (2) this study. # #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## Depth depth,,,centimeter,,paleoceanography,,,N, ## age age,,,calendar kiloyear before present,,paleoceanography,,,N, ## d18O-G.rub delta 18O,Globigerinoides ruber,,per mil PDB,,paleoceanography,,,N, ## Mg/Ca-G.rub magnesium/calcium,Globigerinoides ruber,, micromole per mole,,paleoceanography,,,N, ## SST-Mg/Ca sea surface temperature,magnesium/calcium; Globigerinoides ruber,,degree Celsius,,climate reconstructions; paleoceanography,,,N,used equation proposed by Anand et al. [2003] for G.?ruber (250–350?΅m): Mg/Ca=0.38exp^(0.09*T) ## d18Osw delta 18O,sea water,,per mil SMOW,,climate reconstructions; paleoceanography,,,N,used the d18O-temperature equation of Bemis et al. [1998] #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: NaN Depth age d18O-G.rub Mg/Ca-G.rub SST-Mg/Ca d18Osw 18 0.21 -2.57 4.42 27.26 0.27 23 0.62 -2.79 4.45 27.35 0.08 28 1.02 -2.83 4.30 26.95 -0.05 33 1.53 -2.35 4.35 27.08 0.46 38 1.75 -2.70 4.01 26.18 -0.08 43 2.07 -2.60 4.08 26.37 0.06 48 2.36 -2.78 4.02 26.20 -0.15 53 2.57 NaN NaN NaN NaN 58 2.79 -2.56 4.23 26.78 0.18 63 3.00 -2.54 4.49 27.44 0.34 68 3.23 -2.49 4.48 27.40 0.37 73 3.47 -2.74 4.43 27.29 0.10 78 3.69 -2.41 4.10 26.42 0.24 83 3.92 -2.64 4.77 28.11 0.36 88 4.15 -2.48 4.23 26.79 0.25 93 4.37 -2.70 4.14 26.54 -0.02 98 4.60 -2.66 3.96 26.04 -0.09 103 4.84 -2.68 4.33 27.03 0.10 108 5.06 -2.24 4.50 27.46 0.63 113 5.28 -2.05 4.11 26.44 0.60 118 5.51 -2.17 4.21 26.71 0.54 123 5.73 -2.14 4.30 26.95 0.61 128 5.96 -2.42 4.14 26.53 0.24 133 6.20 -2.38 4.20 26.70 0.31 138 6.42 -2.37 4.19 26.67 0.31 143 6.64 NaN NaN NaN NaN 148 6.86 -2.52 4.09 26.40 0.10 153 7.06 -2.35 3.97 26.08 0.19 158 7.22 -2.30 4.28 26.90 0.41 163 7.41 -2.44 4.23 26.78 0.24 168 7.60 -2.10 3.99 26.14 0.45 173 7.79 -2.40 3.85 25.73 0.05 178 7.99 -2.43 4.24 26.80 0.24 183 8.19 -2.63 4.09 26.40 -0.06 188 8.39 -2.03 3.97 26.07 0.47 193 8.57 -2.51 3.93 25.95 -0.07 198 8.76 NaN NaN NaN NaN 203 8.94 -2.55 4.49 27.44 0.17 208 9.15 -2.09 4.55 27.59 0.65 213 9.36 -2.14 4.04 26.27 0.30 218 9.58 -2.69 4.33 27.04 -0.10 223 NaN NaN NaN NaN NaN 228 NaN NaN NaN NaN NaN 233 11.19703 -2.28 NaN NaN NaN 238 11.6067 -1.19 4.31 26.99 1.19 243 12.11879 -1.31 4.30 26.97 1.00 248 12.63087 -0.94 4.16 26.58 1.21 253 13.14296 -1.75 4.11 26.46 0.30 258 13.65504 -1.39 4.00 26.15 0.54 263 14.16713 -1.14 3.69 25.26 0.53 268 14.67921 -1.30 4.21 26.73 0.62 273 15.1913 -1.06 3.79 25.56 0.57 278 15.634 -1.08 4.00 26.16 0.63 283 16.1366 -1.06 4.06 26.32 0.66 288 16.6878 -0.93 3.47 24.58 0.40 293 17.2163 -0.71 3.78 25.52 0.79 298 17.702 -0.64 3.65 25.13 0.77 303 18.2758 -0.78 3.78 25.52 0.69 308 19.0039 -0.78 3.64 25.09 0.58 313 19.865 -0.60 3.29 23.97 0.52 318 20.8027 -0.96 3.68 25.23 0.43 323 21.7294 -0.84 3.52 24.73 0.46 328 22.557 -0.96 3.54 24.78 0.37 333 23.6359 -0.47 3.83 25.67 1.07 338 24.9864 -0.75 3.63 25.07 0.72 343 26.4069 -0.66 3.47 24.57 0.75 348 27.8229 -0.97 3.38 24.27 0.45 353 29.3494 -0.71 3.48 24.62 0.85 358 30.8713 -0.60 3.62 25.06 1.10 363 32.2957 -1.08 4.09 26.41 0.92 368 33.6267 -1.30 3.68 25.22 0.45