# Line Islands Mg/Ca and sea surface temperature reconstruction in the early and mid-Holocene #----------------------------------------------------------------------- # World Data Service 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: https://www.ncdc.noaa.gov/paleo/study/23730 # Description: NOAA Landing Page # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/white2017/white2018-WEP-SST-RecordsUsed_Metadata.txt # Description: NOAA location of the template # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/ # Description: NOAA location of the associated Proxy Data Table file # # # Archive: Paleoceanography # # Dataset_DOI: # # Parameter_Keywords: trace metals in carbonates, reconstruction, biomarkers #--------------------------------------- # Contribution_Date # Date: 2019-03-11 #--------------------------------------- # File_Last_Modified_Date # Date: 2019-03-11 #--------------------------------------- # Title # Study_Name: Line Islands Mg/Ca and sea surface temperature reconstruction in the early and mid-Holocene #--------------------------------------- # Investigators # Investigators: White, Sarah M.; Ravelo, A. Christina; Polissar, Pratigya J. #--------------------------------------- # Description_Notes_and_Keywords # Description: # Provided Keywords: ENSO, paleoclimate, foraminifera, tropical Pacific, insolation #--------------------------------------- # Publication # Authors: White, Sarah M., Ravelo, A. Christina, and Polissar, Pratigya J. # Published_Date_or_Year: 2018 # Published_Title: Dampened El Niño in the early and mid-Holocene due to insolation-forced warming/deepening of the thermocline # Journal_Name: Geophysical Research Letters # Volume: 45 # Edition: # Issue: 1 # Pages: 316-326 # Report Number: # DOI: 10.1002/2017GL075433 # Online_Resource: # Full_Citation: # Abstract: El Niño–Southern Oscillation (ENSO) dominates interannual climate variability; thus, understanding its response to climate forcing is critical. ENSO's sensitivity to changing insolation is poorly understood, due to contrasting interpretations of Holocene proxy records. Some records show dampened ENSO during the early to mid-Holocene, consistent with insolation forcing of ENSO amplitude, but other records emphasize decadal-centennial fluctuations in ENSO strength, with no clear trend. To clarify Holocene ENSO behavior, we collected proxy data spanning the last ~12 kyr and find relatively low El Niño amplitude during the early to mid-Holocene. Our data, together with published work, indicate both a long-term trend in ENSO strength due to June insolation forcing and high-amplitude decadal-centennial fluctuations; both behaviors are shown in models. The best supported mechanism for insolation-driven dampening of ENSO is weakening of the upwelling feedback by insolation-forced warming/deepening of thermocline source waters. Elucidating the thermocline's role will help predict future ENSO change. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Science Foundation # Grant: 1405178, 1204254 #--------------------------------------- # Site Information # Site_Name: Western Equatorial Pacific # Location: Western Pacific Ocean # Country: # Northernmost_Latitude: 14.82 # Southernmost_Latitude: -13.08 # Easternmost_Longitude: 115.2 # Westernmost_Longitude: 172.35 # Elevation: #--------------------------------------- # Data_Collection # Collection_Name: CollectionMetadata WEP SST compilation White2018 # First_Year: 15000 # Last_Year: 0 # Time_Unit: cal yr BP # Core_Length: # Notes: Age models for individual records are based on radiocarbon or oxygen isotope stratigraphy. The synthesis here bins data into 500-year intervals from 0 to 15 ka. #--------------------------------------- # Synthesis Collection Metadata Fields # NOTE: These are the fields used to capture the metadata about data sources used in a synthesis study. # Each row of this table corresponds to a column in the SourceDataTable file listed above in the Online_Resource URLs. # The rows here are linked to the columns in the data table using the ID field. # Metadata fields that follow that are preceded by "##" in columns one and two. ## dataID dataset ID NOTE: This field is used to tie the data's metadata to the data. This value will be the column header in the data table ## FullDataSetCode A name for the data collection ## archiveType archive or data type of the collection ## latitude latitude of site in decimal degrees North ## longitude longitude of site in decimal degrees East ## elevation elevation of site in meters ## startYear start year in years CE ## endYear end year in years CE ## Citation citation text or DOI for original publication source of data ## Original_Source_Data_URL Original Source URL or DOI(if available) for the data presented here ## variable_used Variable from original source that is being used ## data_accessed Date the original source data was acquired ## notes Any additional information about the use of the record that is not covered in the fields above #--------------------------------------- # RecordsUsed_Metadata: # Missing_Value: dataID FullDataSetCode archiveType latitude longitude elevation startYear endYear Citation Original_Source_Data_URL variable_used data_accessed notes MD98-2181_Mg-Ca Stott_etal_2007_MD98-2181_ruber_Mg-Ca foraminifera 6.45 125.83 0.0026 19.966 doi.org/10.1126/science.1143791 temperature time unit is kilo-annum before present, ka MD98-2176_Mg-Ca Stott_etal_2007_MD98-2176_ruber_Mg-Ca foraminifera -5 133.43 0.126 20.333 doi.org/10.1126/science.1143791 temperature time unit is kilo-annum before present, ka MD98-2170_Mg-Ca Stott_etal_2007_MD98-2170_ruber_Mg-Ca foraminifera -10.5 125 1.8682 19.952 doi.org/10.1126/science.1143791 temperature time unit is kilo-annum before present, ka ODP_806_Mg-Ca Lea_etal_2000_ODP806_ruber_Mg-Ca foraminifera 0.32 159.36 4.3 470 doi.org/10.1126/science.289.5485.1719 temperature time unit is kilo-annum before present, ka GeoB10069-3_Mg-Ca Gibbons_etal_2014_GeoB10069-3_ruber_Mg-Ca foraminifera -9.6 120.92 0.47 35.24 doi.org/10.1016/j.epsl.2013.11.032 temperature time unit is kilo-annum before present, ka MD97-2141_Mg-Ca Rosenthal_etal_2003_MD97-2141_ruber_Mg-Ca foraminifera 8.87 121.28 4.33 21.81 doi.org/10.1029/2002GL016612 temperature time unit is kilo-annum before present, ka ERDC-92_Mg-Ca Palmer_Pearson_2003_ERDC-92_sacculifer_Mg-Ca foraminifera -2.23 157 1.1 23.2 doi.org/10.1126/science.1080796 temperature time unit is kilo-annum before present, ka ODP_871_Mg-Ca Dyez_Ravelo_2013_ODP871_ruber_Mg-Ca foraminifera 5.55 172.35 0 537.15 doi.org/10.1130/G33425.1 temperature time unit is kilo-annum before present, ka MD01-2378_Mg-Ca Xu_etal_2008_MD01-2378_ruber_Mg-Ca foraminifera -13.08 121.78 0.732 23.065 doi.org/10.1016/j.epsl.2008.06.029 temperature time unit is kilo-annum before present, ka MD98-2188_Mg-Ca Dang_etal_2012_MD98-2188_ruber_Mg-Ca foraminifera 14.82 123.49 0.04 12.93 doi.org/10.1029/2011GL050154 temperature time unit is kilo-annum before present, ka 13GGC_Mg-Ca Linsley_etal_2010_13GGC_ruber_Mg-Ca foraminifera -7.4 115.2 0.169 10.557 doi.org/10.1038/ngeo920 temperature time unit is kilo-annum before present, ka 70GGC_Mg-Ca Linsley_etal_2010_70GGC_ruber_Mg-Ca foraminifera -3.57 119.38 0.107 14.3 doi.org/10.1038/ngeo920 temperature time unit is kilo-annum before present, ka Muschu-Koil_coral Abram_etal_2009_coral coral -3 144 0 7.55 doi.org/10.1016/j.quascirev.2009.07.006 temperature time unit is kilo-annum before present, ka MD06-3075_alk Fraser_etal_2014_alk alkenones 6.5 125.83 0.06 15.17 doi.org/10.1002/2013PA002599 temperature time unit is kilo-annum before present, ka