# Indo-Pacific Warm Pool 35KYr Foraminiferal d18Oseawater Estimates #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/16155 # # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/gibbons2014/gibbons2014pc.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleoceanography #-------------------- # Contribution_Date # Date: 2014-03-16 #-------------------- # Title # Study_Name: Indo-Pacific Warm Pool 35KYr Foraminiferal d18Oseawater Estimates #-------------------- # Investigators # Investigators: Gibbons, F.T.; Oppo, D.W.; Mohtadi, M.; Rosenthal, Y.; Cheng, J.; Liu, Z.; Linsley, B.K. #-------------------- # Description_and_Notes # Description: Planktic foraminiferal Mg/Ca and oxygen isotope (d18O) data, plus estimated d18Oseawater # and ice volume corrected del18Oseawater for the past 35,000 years from sediment core GeoB10069-3, # collected in the tropical Eastern Indian Ocean. All data are from G. ruber. Also included is a regional # average of ice volume corrected del18Oseawater and a principal component analysis of this dataset. # Cores included in the average and principal component analysis: # # Core loadings for PC1 loadings for PC2 loadings for PC3 # GeoB10029-4 0.2696 0.1876 -0.5975 # GeoB10038-4 0.4472 -0.5975 0.2573 # GeoB10069-3 0.3045 -0.2522 -0.0749 # MD97-2141 0.1486 0.3436 -0.0994 # MD98-2162 0.3589 0.2571 0.4049 # MD98-2165 0.3499 -0.0312 0.0125 # MD98-2170 0.0223 0.2236 -0.1788 # MD98-2176 0.0122 0.1131 -0.0811 # MD01-2378 0.1487 0.1509 -0.0677 # MD98-2181 0.2556 0.1442 -0.0138 # MD01-2390 0.108 0.2434 0.2675 # V21-30 0.272 -0.0454 -0.0382 # ME0005A-43JC 0.3045 -0.1489 -0.4681 # TR163-22 0.308 0.4113 0.2485 # # #-------------------- # Publication # Authors: Fern T. Gibbons, Delia W. Oppo, Mahyar Mohtadi, Yair Rosenthal, Jun Cheng, Zhengyu Liu, Braddock K. Linsley # Published_Date_or_Year: 2014-02-01 # Published_Title: Deglacial d18O and hydrologic variability in the tropical Pacific and Indian Oceans # Journal_Name: Earth and Planetary Science Letters # Volume: 387 # Edition: # Issue: # Pages: 240-251 # DOI: 10.1016/j.epsl.2013.11.032 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S0012821X13006663 # Full_Citation: # Abstract: Evidence from geologic archives suggests that there were large changes in the tropical hydrologic cycle associated with the two prominent northern hemisphere deglacial cooling events, Heinrich Stadial 1 (HS1; ~19 to 15 kyr BP; kyr BP = 1000 yr before present) and the Younger Dryas (~12.9 to 11.7 kyr BP). These hydrologic shifts have been alternatively attributed to high and low latitude origin. Here, we present a new record of hydrologic variability based on planktic foraminifera-derived d18O of seawater (d18Osw) estimates from a sediment core from the tropical Eastern Indian Ocean, and using 12 additional d18Osw records, construct a single record of the dominant mode of tropical Eastern Equatorial Pacific and Indo-Pacific Warm Pool (IPWP) hydrologic variability. We show that deglacial hydrologic shifts parallel variations in the reconstructed interhemispheric temperature gradient, suggesting a strong response to variations in the Atlantic Meridional Overturning Circulation and the attendant heat redistribution. A transient model simulation of the last deglaciation suggests that hydrologic changes, including a southward shift in the Intertropical Convergence Zone (ITCZ) which likely occurred during these northern hemisphere cold events, coupled with oceanic advection and mixing, resulted in increased salinity in the Indonesian region of the IPWP and the eastern tropical Pacific, which is recorded by the d18Osw proxy. Based on our observations and modeling results we suggest the interhemispheric temperature gradient directly controls the tropical hydrologic cycle on these time scales, which in turn mediates poleward atmospheric heat transport. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: #------------------ # Funding_Agency # Funding_Agency_Name: Woods Hole Oceanographic Institution # Grant: #------------------ # Funding_Agency # Funding_Agency_Name: BMBF # Grant: PABESIA #------------------ # Funding_Agency # Funding_Agency_Name: DFG # Grant: He 3412/15-1 #------------------ # Site_Information # Site_Name: GeoB10069-3 # Location: Ocean>Indian Ocean # Country: # Northernmost_Latitude: -9.009910 # Southernmost_Latitude: -9.009910 # Easternmost_Longitude: 120.015280 # Westernmost_Longitude: 120.015280 # Elevation: -1250 m #------------------ # Data_Collection # Collection_Name: Gibbons2014PC # Earliest_Year: 21250 # Most_Recent_Year: 250 # Time_Unit: Cal. Year BP # Core_Length: m # Notes: #------------------ # Chronology: # # Depth(cm) C-14age(yrs) Error(yrs) CalenderAge(median probability)BP lowerCalRange upperCalRange # 8 755 35 396 449 336 # 65 1680 30 1241 1278 1213 # 88 1970 35 1525 1584 1477 # 107 2260 30 1867 1907 1821 # 122 2360 30 1982 2032 1931 # 188 2910 35 2698 2738 2670 # 268 3950 35 3939 3990 3872 # 378 5140 35 5511 5557 5473 # 468 6800 45 7328 7380 7279 # 593 9450 65 10307 10378 10221 # 644 10600 50 11882 11970 11747 # 693 11700 55 13194 13250 13132 # 724 13200 75 15215 15481 15007 # 753 16050 75 18789 18867 18701 # 786 19050 90 22267 22391 22159 # 818 21900 110 25723 25968 25524 # 894 27100 160 31177 31268 31085 # 953 31000 240 35043 35228 34766 # # #---------------- # Variables # # Data variables follow (have no #) # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## age_calkaBP age, , , calendar kyears before present, , , , ,N ## d18Osw-ivc delta18O, seawater, , per mil SMOW, , , regional average of ice volume corrected del18Oseawater, ,N ## pc1 Principal Component 1, , , , , , regional ice volume corrected del18Oseawater, ,N ## pc2 Principal Component 2, , , , , , regional ice volume corrected del18Oseawater, ,N ## pc3 Principal Component 3, , , , , , regional ice volume corrected del18Oseawater, ,N #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: -999 age_calkaBP d18Osw-ivc pc1 pc2 pc3 0.25 -0.00362 -999 -999 -999 0.75 -0.030615 -999 -999 -999 1.25 0.011531329 -0.3216 -0.2482 0.0934 1.75 0.017670863 -0.3978 0.1152 0.1449 2.25 -0.040997452 -0.61 -0.0319 -0.1363 2.75 -0.045121113 -0.6462 0.3275 0.1175 3.25 -0.004113108 -0.5039 -0.0031 0.2657 3.75 -0.013034197 -0.5511 0.063 -0.2232 4.25 -0.006499884 -0.4469 0.147 0.1071 4.75 0.026212313 -0.376 0.0929 0.242 5.25 -0.071542717 -0.8114 -0.2903 -0.1327 5.75 0.013044975 -0.4362 -0.2541 -0.2297 6.25 -0.008772148 -0.6389 0.2137 -0.0017 6.75 -0.00650487 -0.6006 -0.0612 -0.1808 7.25 0.025818304 -0.3837 0.0477 0.0342 7.75 0.059704956 -0.3035 0.0744 -0.028 8.25 0.050623491 -0.3272 0.2517 0.3621 8.75 0.043211771 -0.4446 0.4803 0.0338 9.25 0.006890983 -0.4968 0.0307 -0.3829 9.75 -0.003539132 -0.4096 0.1173 -0.2176 10.25 0.020792562 -0.3091 -0.082 -0.1308 10.75 0.102650731 0.0887 -0.1267 -0.0029 11.25 0.141372105 0.1821 0.0299 -0.2002 11.75 0.260545477 0.4194 0.0632 -0.1221 12.25 0.377128846 1.0989 0.1666 0.1542 12.75 0.296812688 0.8319 -0.0315 0.103 13.25 0.242577399 0.4216 0.4332 -0.1348 13.75 0.215056306 0.2973 0.2592 0.2874 14.25 0.19625795 0.3147 0.1922 0.1689 14.75 0.178466254 0.1519 -0.0554 -0.1838 15.25 0.319914103 0.8051 0.0012 0.5655 15.75 0.363253321 0.9936 0.1225 -0.3688 16.25 0.333999408 0.9574 -0.143 -0.0347 16.75 0.335045148 0.7703 -0.089 -0.1266 17.25 0.349820421 0.9494 -0.1045 0.0625 17.75 0.3442 0.628 0.1042 -0.411 18.25 0.208723553 0.5108 -0.2764 0.0541 18.75 0.15314019 0.3425 -0.5377 -0.1748 19.25 -0.043632083 -0.4219 -0.4885 0.1266 19.75 -0.000915385 -0.3267 -0.5098 0.5004 20.25 -0.064283383 -999 -999 -999 20.75 0.00811797 -999 -999 -999 21.25 -0.036414643 -999 -999 -999