# Eastern Equatorial Pacific SST and Isotope Data During Heinrich Stadial 1 #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # 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: http://www.hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID: # # Original_Source_URL: http://onlinelibrary.wiley.com/doi/10.1002/2013PA002499/full # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2013/kienast2013-me24-uvi.txt # # Archive: Paleoceanography #--------------------------------------- # Contribution_Date # Date: 2014-02-04 #--------------------------------------- # Title # Study_Name:Eastern Equatorial Pacific SST and Isotope Data During Heinrich Stadial 1 #--------------------------------------- # Investigators # Investigators: Kienast, S.S.; Friedrich, T.; Dubois, N.; Hill, P.S.; Timmermann, A.; Mix, A.C.; Kienast, M. #--------------------------------------- # Description_Notes_and_Keywords # Description: # Description: Notes on Thorium measurements: # 230Th xs,o refers to the measured value as corrected for # ingrowth of 230Th from detrital and authigenic uranium. # These values are calculated using the measured concentrations of 230Th, # 232Th and 238U, and assuming that all 232Th is detrital in origin. # It also assumes a detrital 238U/232Th ratio of 0.7. In nature, this ratio can be variable. # Concentrations are corrected for decay since deposition. # # 230Th-norm flux refers to the 230Th-normalized bulk sediment mass accumulation rate (or flux). # 232Th flux refers to the 230Th-normalized flux of Thorium-232. # This flux is calculated as 230Th-norm flux * 232Th (micro g/g) # Note that 232Th (micro g/g) = 232Th (dpm/g) * (1/246186) * 10^6 # Please refer to Francois et al. (2004) for more detail on this proxy. # # Note that the 230Th xs,o data of cores ME0005-24JC and TR163-31P given here # differ slightly from those originally published by Kienast et al. 2007 due a) # the use of an updated age model here and b) a minor spread sheet error in the earlier publication. # Neither update affects the conclusions reached in the earlier study in any way. # # For core V19-30, 230Th, 232Th, and 238U data can be found in Hayes et al. 2010. # Additional References: # Koutavas, A., and J. P. Sachs (2008), Northern timing of deglaciation in the eastern equatorial Pacific from alkenone paleothermometry, Paleoceanography, 23, doi:10.1029/2008PA001593 # Kienast, S. S., M. Kienast, A. C. Mix, S. E Calvert, and R. François (2007), Thorium-230 normalized particle flux and sediment focusing in the Panama Basin region during the last 30,000 years, Paleoceanography, 22, 10.1029/2006PA001357, 2007. # Dubois, N., M. Kienast, S. Kienast, C. Normandeau, S. E. Calvert, T. D. Herbert, and A. Mix (2011), Millennial-scale variations in hydrography and biogeochemistry in the Eastern Equatorial Pacific over the last 100 kyr, Quat. Sci. Rev., 30, 210-233, # Martin, P. A., D. W. Lea, Y. Rosenthal, N. J. Shackleton, M. Sarnthein, and T. Papenfuss (2002), Quaternary deep sea temperatures derived from benthic foraminiferal Mg/Ca, Earth Planet. Sci. Lett., 198, 193-209, # Francois, R., M. Frank, M. M. R. v. d. Loeff, and M. P. Bacon (2004), 230Th normalization: An essential tool for interpreting sedimentary fluxes during the late Quaternary, Paleoceanography, 19, doi:10.1029/2003PA000939 # #--------------------------------------- # Publication # Authors: Kienast, S.S., T. Friedrich, N. Dubois, P.S. Hill, A. Timmermann, A.C. Mix, and M. Kienast # Published_Date_or_Year: 2013 # Published_Title: Near collapse of the meridional SST gradient in the eastern equatorial Pacific during Heinrich Stadial 1 # Journal_Name: Paleoceanography # Volume: 28 # Issue: # Pages: 663-674 # Report Number: # DOI: 10.1002/2013PA002499 # Abstract: Sea surface temperatures (SST) and inorganic continental input over the last 25,000?years (25?ka) are reconstructed in the far eastern equatorial Pacific (EEP) based on three cores stretching from the equatorial front (~0.01°N, ME0005-24JC) into the cold tongue region (~3.6°S; TR163-31P and V19-30). We revisit previously published alkenone-derived SST records for these sites and present a revised chronology for V19-30. Inorganic continental input is quantified at all three sites based on 230Th-normalized fluxes of the long-lived continental isotope thorium-232 and interpreted to be largely dust. Our data show a very weak meridional (cross-equatorial) SST gradient during Heinrich Stadial 1 (HS1, 18–15?ka?B.P.) and high dust input along with peak export production at and north of the equator. These findings are corroborated by an Earth system model experiment for HS1 that simulates intensified northeasterly trade winds in the EEP, stronger equatorial upwelling, and surface cooling. Furthermore, the related southward shift of the Intertropical Convergence Zone (ITCZ) during HS1 is also indicative of drier conditions in the typical source regions for dust. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Canadian Foundation for Climate and Atmospheric Sciences (CFCAS) # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Canadian Institute for Advanced Research (CIFAR) # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Natural Sciences and Engineering Research Council (NSERC), Canada # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Science Foundation # Grant: 1010869 #--------------------------------------- # Site Information # Site_Name: ME0005-24JC # Location: Eastern Equatorial Pacific # Northernmost_Latitude: 0.0217 # Southernmost_Latitude: 0.0217 # Easternmost_Longitude: -86.46 # Westernmost_Longitude: -86.46 # Elevation: -2941 #--------------------------------------- # Data_Collection # Collection_Name: ME0005-24JC Uvigerina K13 # First_Year: 51470 # Last_Year: 6490 # Time_Unit: cal yrBP # Core_Length: # Notes: #--------------------------------------- # Chronology: Chronology of core ME0005-24JC is from Dubois et al. (2011, scenario 1) # #--------------------------------------- # Variables # Data variables follow (have no #) # Variables format: one per line, shortname then 9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## depth_cm depth ,,,cm,,,,,N ## age_calkyaBP age,,,kyr BP,,,,,N ## d18Ouvi>150 delta 18O,Uvigerina spp.,,per mil PDB,,Paleoceanography,>150um,,N ## d18Ouvi>150_err delta 18O,Uvigerina spp.,1-sigma,per mil PDB,,Paleoceanography,>150um,,N ## d13Cuvi>150 delta 13C,Uvigerina spp.,,per mil PDB,,Paleoceanography,>150um,,N ## d13Cuvi>150_err delta 13C,Uvigerina spp.,1-sigma,per mil PDB,,Paleoceanography,>150um,,N ## notes notes,,, ,,,,,C #-------------------------------------- # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: -999 depth_cm age_calkyaBP d18Ouvi>150 d18Ouvi>150_err d13Cuvi>150 d18Ouvi>150_err notes 42 6.49 3.47 0.04 -0.82 0.01 K011211.arc:2986 52 7.68 3.45 0.03 -0.79 0.01 K011211.arc:2987 62 8.32 3.46 0.03 -0.93 0.02 K011211.arc:2989 72 8.97 3.63 0.01 -0.84 0.01 K011211.arc:2990 82 9.59 3.56 0.03 -0.84 0.01 K011211.arc:2991 92 10.06 3.74 0.01 -0.78 0.02 K011217.arc:3076 102 10.51 3.73 0.02 -0.71 0.01 K011217.arc:3077 112 10.98 3.48 0.04 -1.11 0.01 K011217.arc:3078 122 11.44 3.45 0.05 -0.98 0.03 K011217.arc:3079 132 11.9 3.86 0.02 -1.01 0.01 K011211.arc:2992 142 12.36 3.89 0.07 -1.11 0.03 K011211.arc:2993 152 12.82 4.08 0.02 -0.95 0.01 K011211.arc:2994 162 13.28 4.10 0.03 -1.08 0.01 K011211.arc:2996 172 13.74 4.14 0.03 -0.98 0.01 K011211.arc:2998 182 14.2 4.35 0.01 -1.01 0.01 K011211.arc:3000 202 15.12 4.39 0.03 -1.06 0.02 K011211.arc:3004 212 15.58 4.87 0.01 -0.81 0.01 K011211.arc:3008 222 16.04 4.80 0.02 -1.07 0.01 K011211.arc:3010 232 16.47 4.59 0.02 -1.14 0.01 K011211.arc:3012 242 16.76 4.78 0.03 -1.12 0.01 K011211.arc:3014 252 17.06 4.84 0.03 -1.15 0.01 K020226.arc:3935 262 17.35 4.90 0.02 -1.31 0.01 K020226.arc:3937 282 17.94 5.13 0.01 -1.24 0.01 K011211.arc:3016 292 18.24 5.25 0.02 -1.24 0.00 K011211.arc:3018 302 18.67 4.92 0.01 -1.31 0.01 K011211.arc:3020 341 20.36 5.06 0.03 -1.19 0.01 K011211.arc:3022 351 20.81 5.03 0.02 -1.17 0.00 K011211.arc:3024 362 21.65 5.08 0.01 -1.19 0.01 K011217.arc:3082 372 22.42 4.79 0.01 -1.26 0.01 K011217.arc:3084 382 23.2 4.92 0.01 -1.21 0.01 K011217.arc:3085 392 23.98 4.87 0.02 -1.08 0.02 K011217.arc:3087 402 24.76 4.86 0.01 -1.21 0.01 K011217.arc:3089 412 25.53 4.78 0.02 -1.22 0.01 K011217.arc:3091 422 26.31 4.84 0.02 -1.21 0.01 K011217.arc:3093 432 27.09 4.71 0.01 -1.11 0.01 K011217.arc:3097 442 27.87 4.71 0.02 -1.17 0.01 K011217.arc:3099 452 28.64 4.81 0.03 -1.13 0.01 K011217.arc:3101 462 29.42 4.55 0.02 -1.16 0.00 K011217.arc:3103 472 30.2 4.56 0.02 -1.10 0.02 K011217.arc:3105 482 30.98 4.49 0.02 -0.99 0.01 K011217.arc:3107 502 32.53 4.35 0.03 -1.09 0.02 K011217.arc:3110 512 33.31 4.58 0.01 -0.86 0.01 K011217.arc:3112 522 34.09 4.67 0.02 -1.15 0.01 K020226.arc:3939 532 34.87 4.54 0.01 -0.98 0.01 K020226.arc:3941 542 35.64 4.49 0.04 -0.98 0.01 K020226.arc:3943 552 36.39 4.69 0.01 -0.96 0.01 K020226.arc:3945 562 37.01 4.51 0.02 -1.11 0.01 K020226.arc:3947 572 37.63 4.70 0.02 -0.72 0.02 K020226.arc:3949 582 38.25 4.47 0.03 -0.94 0.02 K020226.arc:3950 592 38.87 4.52 0.02 -0.92 0.01 K020226.arc:3951 602 39.58 4.45 0.02 -0.95 0.01 K020226.arc:3953 612 40.55 4.66 0.02 -0.98 0.01 K020226.arc:3957 622 41.55 4.57 0.03 -1.00 0.02 K020226.arc:3958 632 42.55 4.65 0.01 -1.05 0.01 K020226.arc:3960 642 43.55 4.60 0.01 -1.04 0.01 K020226.arc:3962 652 44.55 4.49 0.02 -0.92 0.01 K020226.arc:3964 662 45.55 4.49 0.01 -0.78 0.01 K020226.arc:3966 672 46.58 4.47 0.02 -0.90 0.01 K020226.arc:3968 682 48.21 4.43 0.01 -0.93 0.02 K020226.arc:3970 692 49.84 4.57 0.02 -0.70 0.01 K020226.arc:3972 702 51.47 4.59 0.03 -1.09 0.01 K020226.arc:3974