# Eastern Labrador Sea Stable Isotope, Trace Metal and SST Data over the last 1250 Years #----------------------------------------------------------------------- # 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: https://www.ncdc.noaa.gov/paleo/study/19802 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/moffa-sanchez2014-poc/moffa-sanchez2014-poc.txt # # Archive: Paleoceanography # # Parameter_Keywords: oxygen isotopes, trace metal in carbonates, population abundance, reconstructions #--------------------------------------- # Contribution_Date # Date: 2016-02-23 #--------------------------------------- # Title # Study_Name: Eastern Labrador Sea Stable Isotope, Trace Metal and SST Data over the last 1250 Years #--------------------------------------- # Investigators # Investigators: Moffa-Sánchez, P.; Hall, I.R.; Barker, S.; Thornalley, D.J.R.; Yashayaev, I. #--------------------------------------- # Description_Notes_and_Keywords # Description: # Provided Keywords: Last millennium, Labrador Sea #--------------------------------------- # Publication # Authors: Moffa-Sánchez, P., I.R. Hall, S. Barker, D.J.R. Thornalley, and I. Yashayaev # Published_Date_or_Year: 2014 # Published_Title: Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age # Journal_Name: Paleoceanography # Volume: 29 # Issue: # Pages: 160-175 # Report Number: # DOI: 10.1002/2013PA002523 # Online_Resource: http://onlinelibrary.wiley.com/doi/10.1002/2013PA002523/abstract # Full_Citation: # Abstract: Despite the relative climate stability of the present interglacial, it has been punctuated by several centennial-scale climatic oscillations; the latest of which are often colloquially referred to as the Medieval Climatic Anomaly (MCA) and the Little Ice Age (LIA). The most favored explanation for the cause of these anomalies is that they were triggered by variability in solar irradiance and/or volcanic activity and amplified by ocean-atmosphere-sea ice feedbacks. As such, changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) are widely believed to have been involved in the amplification of such climatic oscillations. The Labrador Sea is a key area of deep water formation. The waters produced here contribute approximately one third of the volume transport of the deep limb of the AMOC and drive changes in the North Atlantic surface hydrography and subpolar gyre circulation. In this study, we present multiproxy reconstructions from a high-resolution marine sediment core located south of Greenland that suggest an increase in the influence of polar waters reaching the Labrador Sea close to MCA-LIA transition. Changes in freshwater forcing may have reduced the formation of Labrador Sea Water and contributed toward the onset of the LIA cooling. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: UK National Environmental Research Council (NERC) # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Climate Change Consortium of Wales # Grant: #--------------------------------------- # Site Information # Site_Name: RAPiD-35-25B # Location: North Atlantic Ocean # Country: # Northernmost_Latitude: 57.504167 # Southernmost_Latitude: 57.504167 # Easternmost_Longitude: -48.722333 # Westernmost_Longitude: -48.722333 # Elevation: -3484 #--------------------------------------- # Data_Collection # Collection_Name: RAPiD-35-25B POC Moffa2014 # First_Year: 764 # Last_Year: 1915 # Time_Unit: Years AD # Core_Length: 0.44 # Notes: #--------------------------------------- # Chronology_Information # Chronology: # # Labcode sample identification used by 14C laboratory # depth Depth of sample interval (cm) # mat.dated Material Dated # 14C.raw±14C.raw_err conventional radiocarbon age, years before 1950AD±standard error # datemeth Dating method # reservoir Reservoir correction # CalAge Calibrated age (years AD) # 95% confidence age interval Calibrated age, 95% confidence bound (years AD) # calib_method Method used to calibrate # notes notes # # Labcode depth mat.dated 14C.raw±14C.raw_err datemeth reservoir CalAge 95% confidence age interval calib_method notes # OS-82608 0.25 N.pachyderma (s) 285±30 14C AMS Marine09 1914 1942-1877 Bchron NaN # SUERC-35759 6.25 N.pachyderma (s) 720±37 14C AMS Marine09 1585 1663-1499 Bchron excluded # OS-86418 16.75 N.pachyderma (s) 895±25 14C AMS Marine09 1444 1483-1399 Bchron NaN # SUERC-35760 22.75 N.pachyderma (s) 1145±35 14C AMS Marine09 1258 1309-1179 Bchron NaN # OS-86417 28.75 N.pachyderma (s) 1270±25 14C AMS Marine09 1134 1214-1059 Bchron NaN # SUERC-35761 36.25 N.pachyderma (s) 1437±37 14C AMS Marine09 968 1040-867 Bchron NaN # OS-82607 43.5 N.pachyderma (s) 1610±35 14C AMS Marine09 774 881-696 Bchron NaN # #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## depth_mm depth,,,mm ,,,,,N ## age_AD age,,,years AD,,,,,N ## d18On.pachy-l delta 18O,Neogloboquadrina pachyderma left coiling,,per mil PDB,,paleoceanography,,analytical technique: isotope ratio mass spectrometry,N ## Mg/Ca-n.pachy-l Magnesium/Calcium,Neogloboquadrina pachyderma left coiling,,mmol/mol,,paleoceanography,,analytical technique: inductively coupled plasma mass spectrometry,N ## sst-Mg/Ca-n.pachy-l temperature,sea surface,,degrees Celsius,,climate reconstruction,,using Elderfield and Ganssen(2000),N ## d18Osw-n.pachy-l delta 18O seawater,,,per mil SMOW,,climate reconstruction,,using N.pachyderma left coiling,N ## sal-n.pachy-l salinity,,,psu,,climate reconstruction,,using Neogloboquadrina pachyderma left coiling and LeGrande and Schmidt(2006),N ## d18Ot.quin delta 18O,Turborotalita quinqueloba,,per mil PDB,,paleoceanography,,analytical technique: isotope ratio mass spectrometry,N ## n.pachy-l% Neogloboquadrina pachyderma (left coiling),,,percent,,paleoceanography,,counting,N #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: -999 depth_mm age_AD d18On.pachy-l Mg/Ca-n.pachy-l sst-Mg/Ca-n.pachy-l d18Osw-n.pachy-l sal-n.pachy-l d18Ot.quin n.pachy-l% 0.25 1914.65 2.53 0.91 5.96 0.35047819 34.89413 1.835504 -999 0.75 1897.45 2.62 0.90 5.87 0.40967917 34.95711 1.763441 70.41229 1.25 1883.32 2.71 0.87 5.57 0.42734623 34.9759 1.836459 73.97629 1.75 1869.13 2.72 0.85 5.36 0.38734506 34.93335 1.767517 90.9497 2.25 1855.27 2.61 0.92 6.06 0.45585442 35.00623 1.988177 82.65583 2.75 1841.08 2.58 0.98 6.76 0.60188338 35.16158 1.767163 84.89446 3.25 1826.98 2.51 0.86 5.38 0.17897835 34.71168 1.485176 76.6742 3.75 1812.92 2.57 0.89 5.73 0.32463212 34.86663 1.847135 82.15646 4.25 1798.92 2.57 0.88 5.69 0.31665391 34.85814 1.555547 78.98258 4.75 1785.29 2.60 0.88 5.60 0.32032223 34.86204 1.750681 84.27257 5.25 1771.36 2.57 0.88 5.64 0.30890653 34.8499 1.683083 73.74172 5.75 1757.23 2.57 0.86 5.39 0.23525275 34.77155 1.855086 78.27098 6.25 1743.38 2.52 0.85 5.32 0.17533974 34.70781 1.710802 94.37853 6.75 1729.32 2.48 0.84 5.18 0.09143801 34.61855 1.729912 80.35761 7.25 1715.26 2.52 0.84 5.16 0.1334278 34.66322 -999 95.59055 7.75 1701.13 2.50 0.88 5.66 0.24356536 34.78039 1.569164 79.73692 8.25 1687.32 2.47 0.83 5.11 0.06461546 34.59002 1.741503 84.43133 8.75 1673.30 2.61 0.85 5.30 0.25824745 34.79601 1.446979 87.94739 9.25 1659.17 2.60 0.82 5.00 0.17161652 34.70385 1.975945 93.10241 9.75 1645.07 2.60 0.85 5.30 0.24806255 34.78517 1.686394 78.54427 10.25 1631.02 2.53 0.85 5.31 0.17646743 34.70901 1.76238 84.80758 10.75 1617.31 2.52 0.89 5.73 0.28132356 34.82056 1.615674 90.32663 11.25 1603.21 2.61 0.80 4.76 0.11901742 34.64789 -999 93.69111 11.75 1589.36 2.58 0.94 6.36 0.50031544 35.05353 1.674448 83.27586 12.25 1575.41 2.55 0.82 4.92 0.09769442 34.62521 1.699166 77.5464 12.75 1561.50 2.46 0.85 5.33 0.11363353 34.64216 1.628052 93.28302 13.25 1547.70 2.52 0.77 4.34 -0.0800249 34.43614 1.66865 95.59381 13.75 1533.79 2.35 0.88 5.63 0.08017728 34.60657 1.589065 95.64086 14.25 1519.87 2.61 0.87 5.51 0.31025061 34.85133 1.878609 91.22454 14.75 1505.83 2.54 0.93 6.18 0.40991577 34.95736 1.634658 92.704 15.25 1492.20 2.50 0.83 5.04 0.07786316 34.60411 1.604444 90.02574 15.75 1478.11 2.53 0.81 4.79 0.04954423 34.57398 1.785228 84.70276 16.25 1463.75 2.56 0.83 5.02 0.13516873 34.66507 1.781845 88.22162 16.75 1444.26 2.56 0.86 5.39 0.22958223 34.76551 1.6494 78.33817 17.25 1425.39 2.58 0.84 5.23 0.20902471 34.74364 1.744065 81.90955 17.75 1410.51 2.66 0.79 4.62 0.13267262 34.66242 1.637634 85.52964 18.25 1395.49 2.60 0.86 5.39 0.27264094 34.81132 1.566145 78.63613 18.75 1380.54 2.46 0.83 5.07 0.04364731 34.56771 1.571026 61.61103 19.25 1365.66 2.59 0.80 4.74 0.0892233 34.6162 1.481359 56.3357 19.75 1350.80 2.51 0.86 5.39 0.18153439 34.7144 1.473538 57.65132 20.25 1336.08 2.60 0.85 5.34 0.25446524 34.79198 1.582714 65.63252 20.75 1321.44 2.52 0.84 5.18 0.1353171 34.66523 1.59497 68.71898 21.25 1307.06 2.43 0.86 5.39 0.10384795 34.63175 1.616959 85.92498 21.75 1292.59 2.55 0.88 5.64 0.28131086 34.82054 1.633344 85.79297 22.25 1276.00 2.57 0.82 4.90 0.11326314 34.64177 1.593545 82.78112 22.75 1259.42 2.51 0.80 4.71 0.00288088 34.52434 1.659785 87.86176 23.25 1246.19 2.46 0.82 4.93 0.00910871 34.53097 1.74619 92.41693 23.75 1235.50 2.62 0.86 5.40 0.29327467 34.83327 1.586332 81.32952 24.25 1225.60 2.60 0.84 5.16 0.21327728 34.74817 1.653342 84.42463 24.75 1215.96 2.56 0.91 5.98 0.37926239 34.92475 1.618011 94.62711 25.25 1206.36 2.66 0.78 4.43 0.08010749 34.6065 1.563211 84.44444 25.75 1196.96 2.58 0.86 5.37 0.24656665 34.78358 1.603413 76.80825 26.25 1187.46 2.57 0.84 5.19 0.18449304 34.71755 1.684519 79.1694 26.75 1178.26 2.53 0.82 4.98 0.08934459 34.61632 1.603184 72.5411 27.25 1168.85 2.52 0.86 5.39 0.19456514 34.72826 1.526037 84.02673 27.75 1159.18 2.51 0.83 5.01 0.07861619 34.60491 1.572798 81.67675 28.25 1148.53 2.58 0.85 5.33 0.23020419 34.76617 1.601819 51.18097 28.75 1133.75 2.56 0.83 5.09 0.1570213 34.68832 1.595037 54.92524 29.25 1117.44 2.58 0.85 5.25 0.20993635 34.74461 1.66171 92.57681 29.75 1105.04 2.60 0.85 5.33 0.25113018 34.78844 1.636884 91.95296 30.25 1093.82 2.63 0.84 5.13 0.2349866 34.77126 1.817383 -999 30.75 1083.17 2.54 0.88 5.61 0.26381529 34.80193 2.002811 -999 31.25 1072.84 2.58 0.82 4.92 0.13186621 34.66156 1.747567 -999 31.75 1062.14 2.40 0.81 4.88 -0.0637996 34.4534 1.719099 54.76326 32.25 1051.84 2.71 0.77 4.30 0.09070396 34.61777 1.647711 -999 32.75 1041.63 2.59 0.77 4.30 -0.0268382 34.49273 1.89645 -999 33.25 1031.51 2.62 0.83 5.01 0.18910622 34.72245 1.736277 -999 33.75 1021.19 2.48 0.81 4.81 0.00337021 34.52486 1.69998 60.66351 34.25 1011.18 2.59 0.79 4.62 0.0657414 34.59121 1.58431 -999 34.75 1000.90 2.50 0.76 4.23 -0.1324906 34.38033 1.496254 -999 35.25 989.94 2.53 0.86 5.46 0.21896565 34.75422 1.546733 -999 35.75 978.00 2.50 0.86 5.37 0.16251886 34.69417 1.620051 71.48564 36.25 961.38 2.62 0.93 6.21 0.49723831 35.05025 1.451531 -999 36.75 943.09 2.56 0.83 5.04 0.13387226 34.66369 1.59131 -999 37.25 929.53 2.34 0.83 5.05 -0.0759872 34.44044 1.805799 -999 37.75 917.45 2.48 0.79 4.62 -0.0483184 34.46987 1.593179 78.30333 38.25 905.75 2.60 0.83 5.01 0.17199262 34.70425 1.600749 -999 38.75 894.23 2.47 0.85 5.32 0.12193897 34.651 1.561248 -999 39.25 882.88 2.54 0.83 5.06 0.12121709 34.65023 1.726902 -999 39.75 871.44 2.55 0.84 5.18 0.16369404 34.69542 1.588082 61.25741 40.25 859.27 2.33 0.84 5.15 -0.0589552 34.45856 1.57028 -999 40.75 847.21 2.52 0.85 5.29 0.16424555 34.69601 1.605043 -999 41.25 835.42 2.59 0.84 5.13 0.195903 34.72968 1.591783 -999 41.75 823.14 2.62 0.84 5.17 0.23818491 34.77466 1.641355 87.13273 42.25 810.63 2.59 0.88 5.69 0.33768346 34.88051 1.728749 -999 42.75 797.69 2.44 0.86 5.39 0.11444648 34.64303 1.61341 -999 43.25 783.45 2.52 0.85 5.32 0.1760593 34.70857 1.630737 -999 43.75 763.36 2.36 0.86 5.32 0.00927771 34.53115 1.771406 75.21431