# Southern Indian Ocean, Foraminifera-bound d18O Data over the Past 42 ky #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. # If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with '#' followed by a space # Data lines have no '#' # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/39058 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-ocean-39058.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Paleoceanography # # Dataset_DOI: 10.25921/1yxp-ks32 # # Science_Keywords: #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/paleocean/indian_ocean/umling2023/umling2023-tt1811-50ggc_bulloides_isotopes.txt # Data_Download_Description: NOAA Template File; Bulloides Isotope Data # #--------------------------------------- # Contribution_Date # Date: 2024-02-14 #--------------------------------------- # File_Last_Modified_Date # Date: 2024-12-31 #--------------------------------------- # Title # Study_Name: Southern Indian Ocean, Foraminifera-bound d18O Data over the Past 42 ky #--------------------------------------- # Investigators # Investigators: Umling, Natalie; Sikes, Elisabeth; Rafter, Patrick; Goodkin, Nathalie; Southon, John #--------------------------------------- # Description_Notes_and_Keywords # Description: #--------------------------------------- # Publication # Authors: Umling, N.E., Sikes, E., Rafter, P., Goodkin, N.F., and Southon, J.R. # Published_Date_or_Year: 2024 # Published_Title: Deglacial Carbon Escape From the Northern Rim of the Southern Ocean # Journal_Name: Geophysical Research Letters # Volume: 51 # Edition: # Issue: 8 # Pages: # Report_Number: e2023GL106413 # DOI: 10.1029/2023GL106413 # Online_Resource: # Full_Citation: # Abstract: The Southern Ocean regulates atmospheric CO2 and Earth's climate as a critical region for air-sea gas exchange, delicately poised between being a CO2 source and sink. Here, we estimate how long a water mass has remained isolated from the atmosphere and utilize 14C/12C ratios (Δ14C) to trace the pathway and escape route of carbon sequestered in the deep ocean through the mixed layer to the atmosphere. The position of our core at the northern margin of the Southern Indian Ocean, tracks latitudinal shifts of the Southern Ocean frontal zones across the deglaciation. Our results suggest an expanded glacial Antarctic region trapped CO2, whereas deglacial expansion of the subantarctic permitted ventilation of the trapped CO2, contributing to a rapid atmospheric CO2 rise. We identify frontal positions as a key factor balancing CO2 outgassing versus sequestration in a region currently responsible for nearly half of global ocean CO2 uptake. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: 2002630 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: 1559080 #--------------------------------------- # Site_Information # Site_Name: TT1811-50GGC # Location: Indian Ocean # Northernmost_Latitude: -38.344 # Southernmost_Latitude: -38.344 # Easternmost_Longitude: 77.715 # Westernmost_Longitude: 77.715 # Elevation_m: -1116 #--------------------------------------- # Data_Collection # Collection_Name: TT1811-50GGC_bulloides_isotopes # First_Year: 42322 # Last_Year: 436 # Time_Unit: cal yr BP # Core_Length_m: # Parameter_Keywords: oxygen isotopes # Notes: #--------------------------------------- # Chronology_Information # Chronology: Radiocarbon # Chronology_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/templates/noaa-wds-paleo-14c-terms.csv # Chronology_Download_Description: Radiocarbon terms and definitions. # Chronology_Notes: # Rejection_Rationale: # Reservoir_Method: # Calibration_Method: # Age_Model_Method: Bacon version 2.5.7 (Blaauw & Christen, 2011) # Missing_Values: # Chronology_Table: # lab_code depth_end_cm depth_start_cm date_type material_dated age_calib_BP1950 age_calib_uncert_yr age_14C_BP1950 age_14C_1s_yr delta_R_yr delta_R_uncert_yr calib_curve # UCIAMS_250775 3 4 14C AMS G. inflata NA NA 2930 20 442 101 Marine20 # UCIAMS_250776 5 6 14C AMS G. inflata NA NA 2010 15 442 101 Marine20 # UCIAMS_250777 6 7 14C AMS G. inflata NA NA 2285 15 442 101 Marine20 # UCIAMS_250778 7 8 14C AMS G. inflata NA NA 2255 15 442 101 Marine20 # UCIAMS_250779 8 9 14C AMS G. inflata NA NA 4415 15 442 101 Marine20 # UCIAMS_250780 10 11 14C AMS G. inflata NA NA 4070 20 442 101 Marine20 # UCIAMS_240943 12 13 14C AMS G. inflata NA NA 5465 15 442 101 Marine20 # UCIAMS_250781 14 15 14C AMS G. inflata NA NA 4895 20 442 101 Marine20 # UCIAMS_250782 16 17 14C AMS G. inflata NA NA 6700 15 442 101 Marine20 # UCIAMS_250783 18 19 14C AMS G. inflata NA NA 6020 15 442 101 Marine20 # EDC_tie_1 24 25 tie point G. bulloides 18O tied to ice core 18O 9800 110 NA NA NA NA None # EDC_tie_2 26 27 tie point G. bulloides 18O tied to ice core 18O 11850 95 NA NA NA NA None # EDC_tie_3 32 33 tie point G. bulloides 18O tied to ice core 18O 12650 110 NA NA NA NA None # EDC_tie_4 34 35 tie point G. bulloides 18O tied to ice core 18O 14390 151 NA NA NA NA None # EDC_tie_5 46 47 tie point G. bulloides 18O tied to ice core 18O 17940 189 NA NA NA NA None # EDC_tie_6 62 63 tie point G. bulloides 18O tied to ice core 18O 26350 269 NA NA NA NA None # Fuji_tie_1 72 73 tie point G. bulloides 18O tied to ice core 18O 31000 315 NA NA NA NA None # EDC_tie_7 132 133 tie point G. bulloides 18O tied to ice core 18O 40800 350 NA NA NA NA None #--------------------------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # ## cruise sample identification,,,,,paleoceanography,,,C,sampling cruise identifier ## core sample identification,,,,,paleoceanography,,,C,site name ## top_depth depth at sample end,,,centimeter,,paleoceanography,,,N,Depth top of sample interval (cm) ## bottom_depth depth at sample start,,,centimeter,,paleoceanography,,,N,Depth bottom of sample interval (cm) ## mean_age age,,,calendar year before present,,paleoceanography,,,N,Mean calendar age ## d18O delta 18O,Globigerina bulloides,,per mil PDB,,paleoceanography,,isotope ratio mass spectrometry,N, ## lab notes,,,,,paleoceanography,,,C,analyzing lab; City University of New York Advanced Science Research Center (ASRC) or University of Florida (UF) #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: NA cruise core top_depth bottom_depth mean_age d18O lab TT1811 50GGC 0 1 436 0.362 ASRC TT1811 50GGC 3 4 887 0.911 ASRC TT1811 50GGC 4 5 995 0.531 ASRC TT1811 50GGC 5 6 1080 0.677 ASRC TT1811 50GGC 6 7 1200 0.589 ASRC TT1811 50GGC 7 8 1343 0.572 ASRC TT1811 50GGC 8 9 1918 0.266 ASRC TT1811 50GGC 10 11 3358 0.759 ASRC TT1811 50GGC 12 13 4436 0.413 ASRC TT1811 50GGC 14 15 4917 0.678 ASRC TT1811 50GGC 16 17 5674 0.511 ASRC TT1811 50GGC 18 19 6017 0.966 ASRC TT1811 50GGC 20 21 6773 0.381 ASRC TT1811 50GGC 21 22 7182 0.714 ASRC TT1811 50GGC 22 23 7633 1.066 UF TT1811 50GGC 23 24 8146 0.682 UF TT1811 50GGC 24 25 9187 0.711 ASRC TT1811 50GGC 25 26 10579 0.752 UF TT1811 50GGC 26 27 11130 0.662 UF TT1811 50GGC 28 29 11649 1.110 ASRC TT1811 50GGC 29 30 11824 0.980 UF TT1811 50GGC 30 31 11986 1.129 UF TT1811 50GGC 31 32 12166 1.234 UF TT1811 50GGC 32 33 12371 1.089 ASRC TT1811 50GGC 33 34 12913 1.327 UF TT1811 50GGC 34 35 13678 0.980 UF TT1811 50GGC 35 36 14097 1.329 ASRC TT1811 50GGC 35 36 14097 1.329 ASRC TT1811 50GGC 36 37 14430 1.369 ASRC TT1811 50GGC 37 38 14752 1.229 ASRC TT1811 50GGC 37 38 14752 1.603 ASRC TT1811 50GGC 37 38 14752 1.643 ASRC TT1811 50GGC 38 39 15071 1.441 ASRC TT1811 50GGC 38 39 15071 1.585 ASRC TT1811 50GGC 38 39 15071 1.312 ASRC TT1811 50GGC 39 40 15380 1.487 ASRC TT1811 50GGC 39 40 15380 1.668 ASRC TT1811 50GGC 39 40 15380 1.359 ASRC TT1811 50GGC 40 41 15683 2.196 UF TT1811 50GGC 40 41 15683 1.251 ASRC TT1811 50GGC 41 42 15976 1.965 ASRC TT1811 50GGC 41 42 15976 2.308 ASRC TT1811 50GGC 41 42 15976 2.478 ASRC TT1811 50GGC 42 43 16271 1.948 ASRC TT1811 50GGC 42 43 16271 2.097 ASRC TT1811 50GGC 42 43 16271 1.707 ASRC TT1811 50GGC 43 44 16567 2.389 ASRC TT1811 50GGC 43 44 16567 2.112 ASRC TT1811 50GGC 44 45 16861 2.289 ASRC TT1811 50GGC 45 46 17154 2.334 ASRC TT1811 50GGC 46 47 17522 2.588 ASRC TT1811 50GGC 47 48 17915 2.520 ASRC TT1811 50GGC 48 49 18408 2.566 ASRC TT1811 50GGC 50 51 19448 2.645 ASRC TT1811 50GGC 51 52 19975 2.565 ASRC TT1811 50GGC 52 53 20498 2.063 ASRC TT1811 50GGC 53 54 21029 2.321 ASRC TT1811 50GGC 54 55 21561 2.206 ASRC TT1811 50GGC 55 56 22088 2.501 ASRC TT1811 50GGC 56 57 22614 2.132 ASRC TT1811 50GGC 57 58 23134 2.094 ASRC TT1811 50GGC 58 59 23649 2.209 ASRC TT1811 50GGC 59 60 24158 2.320 ASRC TT1811 50GGC 60 61 24697 2.203 ASRC TT1811 50GGC 62 63 25746 2.352 ASRC TT1811 50GGC 64 65 26602 2.424 ASRC TT1811 50GGC 64 65 26602 1.739 ASRC TT1811 50GGC 66 67 27397 2.287 ASRC TT1811 50GGC 68 69 28187 1.860 ASRC TT1811 50GGC 72 73 29715 2.551 UF TT1811 50GGC 72 73 29715 1.949 ASRC TT1811 50GGC 76 77 30475 2.356 ASRC TT1811 50GGC 80 81 31193 1.728 ASRC TT1811 50GGC 80 81 31193 1.946 ASRC TT1811 50GGC 80 81 31193 1.764 ASRC TT1811 50GGC 84 85 31920 1.789 ASRC TT1811 50GGC 88 89 32652 1.996 ASRC TT1811 50GGC 92 93 33383 2.046 ASRC TT1811 50GGC 92 93 33383 2.266 ASRC TT1811 50GGC 92 93 33383 1.929 UF TT1811 50GGC 96 97 34106 1.838 ASRC TT1811 50GGC 100 101 34833 1.799 ASRC TT1811 50GGC 104 105 35553 1.461 ASRC TT1811 50GGC 108 109 36268 1.450 ASRC TT1811 50GGC 112 113 36983 1.522 UF TT1811 50GGC 112 113 36983 1.784 ASRC TT1811 50GGC 116 117 37708 1.790 ASRC TT1811 50GGC 124 125 39136 1.798 ASRC TT1811 50GGC 128 129 39845 1.915 ASRC TT1811 50GGC 132 133 40579 2.102 ASRC TT1811 50GGC 140 141 42322 1.961 ASRC