# Gulf of California Foraminifera and Wood 14C Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # 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/25650 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rafter2018/rafter2018-et97-7t.txt # Description: URL of this template file # # Original_Source_URL: (URL to original source of data, if applicable) # Description: # # # Description/Documentation lines begin with # # Data lines have no # # # Data_Type: marine sediment microfossil (foraminifera) and wood 14C content (radiocarbon) # # Dataset_DOI: (placeholder for eventual minting by NOAA) # # Parameter_Keywords: carbon isotopes, foraminifera, wood #-------------------- # Contribution_Date # Date: 2018-11-23 #-------------------- # File_Last_Modified_Date # Date: 2018-11-23 #-------------------- # Title # Study_Name: Gulf of California Foraminifera and Wood 14C Data #-------------------- # Investigators # Investigators: Rafter, Patrick A.; Herguera, Juan-Carlos; Southon, John R. #-------------------- # Description_Notes_and_Keywords # Description: #-------------------- # Publication # Authors: Rafter, Patrick A., Juan-Carlos Herguera, and John R. Southon # Published_Date_or_Year: 2018 # Published_Title: Extreme lowering of deglacial seawater radiocarbon recorded by both epifaunal and infaunal benthic foraminifera in a wood-dated sediment core # Journal_Name: Climate of the Past # Volume: in review # Edition: # Issue: # Pages: # Report_Number: # DOI: 10.5194/cp-2018-75 # Online_Resource: # Full_Citation: # Abstract: For over a decade, oceanographers have debated the interpretation and reliability of sediment microfossil records indicating extremely low seawater radiocarbon (14C) during the last deglaciation-observations that suggest a major disruption in marine carbon cycling coincident with rising atmospheric CO2 concentrations. Possible flaws in these records include poor age model controls, utilization of mixed, infaunal foraminifera species possibly influenced by changing porewater chemistry, and bioturbation. We have addressed these concerns using a glacial-interglacial record of epifaunal benthic foraminifera 14C on an ideal sedimentary age model (wood calibrated to atmosphere 14C). Our results affirm – with important caveats – the fidelity of these microfossil archives and confirm previous observations of highly depleted seawater 14C at intermediate depths in the deglacial northeast Pacific. #------------------ # Funding_Agency # Funding_Agency_Name: # Grant: #------------------ # Site_Information # Site_Name: ET97-7T # Location: Northeast Pacific # Country: Mexico # Northernmost_Latitude: 22.9 # Southernmost_Latitude: 22.9 # Easternmost_Longitude: -109.48 # Westernmost_Longitude: -109.48 # Elevation: (in meters) -640 #------------------ # Data_Collection # Collection_Name: ET97-7T 14C Rafter2018 # Earliest_Year: 18949 # Most_Recent_Year: 1380 # Time_Unit: 14C yr BP # Core_Length: # Notes: wood 14C age, constrained by atmospheric 14C via IntCal13 #------------------ # Chronology_Information # Chronology: # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # *** MORE DETAILED INSTRUCTIONS are available at www1.ncdc.noaa.gov/pub/data/paleo/templates/Variable_naming_guide.pdf # variables format: shortname what, material, error, units, seasonality, data_type, detail, method, data_format, additional_information) # ## labcode sample identification, , , , ,paleoceanography,,,N,code used to identify AMS measurement ## depth_top depth at sample end,,,centimeter,,paleoceanography , ,,N,the youngest end of the sample ## depth_bot depth at sample start, , , centimeter,,paleoceanography,,,N,the oldest end of the sample ## mat_dated notes,,, ,,paleoceanography,,,N,material dated for 14C age ## 14C_age age,,,radiocarbon year before present,,paleoceanography , ,,N,radiocarbon age ## 14C_age_err age, ,one standard deviation,radiocarbon year, ,paleoceanography , ,,N,radiocarbon age ## notes notes,,,,,,,,C, # #---------------- # Data: # Missing_Values: NA labcode depth_top depth_bot mat_dated 14C_age 14C_age_err notes 160295 71 73 Bolivina spp. 12086 557 160309 73 75 Bolivina spp. 12808 593 160303 76 78 Bolivina spp. 12964 612 160498 83 85 Bolivina spp. 13329 686 160489 103 105 Bolivina spp. 14371 653 176300 7 9 mixed benthic foraminifera 1380 24 160089 71 73 mixed benthic foraminifera 12086 557 160091 73 75 mixed benthic foraminifera 12808 593 160093 76 78 mixed benthic foraminifera 12964 612 160095 78 80 mixed benthic foraminifera 13068 644 160101 81 83 mixed benthic foraminifera 13225 670 160103 83 85 mixed benthic foraminifera 13329 686 160148 86 88 mixed benthic foraminifera 13487 684 160107 88 90 mixed benthic foraminifera 13592 695 160119 91 93 mixed benthic foraminifera 13747 697 160122 93 95 mixed benthic foraminifera 13851 704 160124 96 98 mixed benthic foraminifera 14008 688 160126 98 100 mixed benthic foraminifera 14111 686 160132 101 103 mixed benthic foraminifera 14267 663 160134 103 105 mixed benthic foraminifera 14371 653 160136 106 108 mixed benthic foraminifera 14528 619 160138 108 110 mixed benthic foraminifera 14631 600 160491 73 75 Planulina ariminensis 12808 593 160304 76 78 Planulina ariminensis 12964 612 160499 83 85 Planulina ariminensis 13329 686 15130,15530,16390 103 105 Planulina ariminensis 14371 653 183760 121 123 Planulina ariminensis 15311 90 183767 126 128 Planulina ariminensis 18000 579 183769 128 130 Planulina ariminensis 18100 112 183768 130 131 Planulina ariminensis 18588 760 177321 131 132.5 Planulina ariminensis 18726 251 183761 132.5 134 Planulina ariminensis 18949 55 176298 7 9 Uvigerina peregrina 1380 24 160320 67 69 Uvigerina peregrina 6473 185 160294 71 73 Uvigerina peregrina 12086 557 160302 76 78 Uvigerina peregrina 12964 612 160497 83 85 Uvigerina peregrina 13329 686 160488 103 105 Uvigerina peregrina 14371 653 183759 121 123 Uvigerina peregrina 15311 90 183770 126 128 Uvigerina peregrina 18000 579 183772 128 130 Uvigerina peregrina 18100 112 183774 130 131 Uvigerina peregrina 18588 760 177320 131 132.5 Uvigerina peregrina 18726 251 183780 121 123 terrestrial wood 12860 30 183783 128 130 terrestrial wood 15055 30 176754 131 132.5 terrestrial wood 15100 230 177380 132.5 134 terrestrial wood 15605 45 183781,183782 126 128 terrestrial wood 15068 38 Rejected b/c does not pass age model test