# Labrador Current Sea Surface Temperature Reconstruction over the last 2000 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: http://www.ncdc.noaa.gov/paleo/study/17716 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sicre2014/sicre2014-03g-04bc.txt # # Original_Source_URL: http://dx.doi.org/10.1016/j.epsl.2014.05.016 # # Archive: Paleoceanography #--------------------------------------- # Contribution_Date # Date: 2015-01-13 #--------------------------------------- # Title # Study_Name: Labrador Current Sea Surface Temperature Reconstruction over the last 2000 years #--------------------------------------- # Investigators # Investigators: Sicre, M.-A.; Weckström, Kaarina; Seidenkrantz, M.-S.; Kuijpers, A.; Benetti, M.; Massé, G.; Ezat, U.; Schmidt, S.; Bouloubassi, I.; Olsen, J.; Khodri, M.; Mignot, J. #--------------------------------------- # Description and Notes # Description: SST based on alkenones in the flow past of the Labrador Current; SST variability strongly linked to the Northern Annular Mode with +NaM giving low SST. AI07-12G and AI07-11BC are from Placentia Bay, southeastern Newfoundland. AI07-03G and AI07-04BC are from Bonavista Bay, northeastern Newfoundland. # Provided Keywords: Sea surface temperature, alkenones, Northern Annular Mode, Labrador Current Streght, Gulf Stream, Atlantic Meridional Overturning Circulation (AMOC), Little Ice Age, Medeival Climate Anomaly, seesaw pattern, 2000 years #--------------------------------------- # Publication # Authors: Sicre, M.-A., K. Weckström, M.-S.Seidenkrantz, A. Kuijpers, M. Benetti, G. Massé, U. Ezat, S. Schmidt, I. Bouloubassi, J. Olsen, M. Khodri, and J. Mignot # Published_Date_or_Year: 2014 # Published_Title: Labrador current variability over the last 2000 years # Journal_Name: Earth and Planetary Science Letters # Volume: 400 # Issue: # Pages: 26-32 # Report Number: # DOI: 10.1016/j.epsl.2014.05.016 # Abstract: The ice-loaded Labrador Current (LC) is an important component of the western North Atlantic circulation that influences the position and strength of the northern limb of the North Atlantic Current (NAC). This flow of cold and fresh Polar Waters originating from the Arctic has a marked impact on the North Atlantic climate, yet little is known about its variability beyond the instrumental period. In this study, we present the first sub-decadal alkenone-based 2000-year long sea-surface temperature (SST) records from the western Labrador Sea, a climatically crucial region at the boundary between the LC and the NAC. Our results show a clear link between the LC strength and the Northern Annular Mode (NAM),with a stronger NAM and a more vigorous LC during the Medieval Climate Anomaly (MCA). This suggests enhanced LC activity upon future global warming with implications for the Atlantic Meridional overturning circulation (AMOC). #--------------------------------------- # Funding_Agency # Funding_Agency_Name: INSU-CNRS # Grant: French LEFE/INSUNAIV project #--------------------------------------- # Funding_Agency # Funding_Agency_Name: European Commission Starting Grant # Grant: ICEPROXY 203441 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Marie Curie Intra-European Fellowship # Grant: 236678 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Danish Council for Independent Research Natural Science # Grant: FNU Grants 09-069833, 12-126709, 272-06-0604 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: European Union’s Seventh Framework programme # Grant: Past4Future (agreement No.243908). #--------------------------------------- # Site Information # Site_Name: AI07-03G and AI07-04BC # Location: North Atlantic Ocean # Country: Canada # Northernmost_Latitude: 48.733 # Southernmost_Latitude: 48.733 # Easternmost_Longitude: -29.483 # Westernmost_Longitude: -29.483 # Elevation: -329 #--------------------------------------- # Data_Collection # Collection_Name: AI07-03G and AI07-04BC SST Sicre14 # First_Year: 5740 # Last_Year: -56 # Time_Unit: cal years BP # Core_Length: 460 # Notes: Core lengths: AI07-03G: 460 cm, AI07-04BC: 39.5 cm. #--------------------------------------- # Chronology: # Age model is based on tephrachronology. Many 14C dates also exist (see below), but are no longer used in the age models from this site. # Lab ID sample identification used by 14C laboratory (POZ: Poznan Radiocarbon Laboratory, Poznan, Poland; CAMS Lawrence Livermore National Laboratory?s Center for Accelerator Mass Spectrometry, Livermore, USA) # Dated material dated material # depth_bot (mm) Depth bottom of sample interval (mm) # depth_top (mm) Depth top of sample interval (mm) # age (bp) non-14C age, years before 150AD # age14C (bp) conventional radiocarbon age, years before 1950AD # age_error (years) radiocarbon age, standard error # calibrated age (cal BP) Calibrated age cal BP # 2-sigma error of cal age (years) 2-sigma confidence # cal_age_range_old (bp) Calibarted age range of the sample - oldest Note 1 sigma age range # cal_age_range_young (2_s) Calibarted age range of the sample - yougest Note 1 sigma age range # depth (mm) Depth at the middle of the sample (mm) NaN # thickness (mm) Sample thickness (mm) NaN # notes notes NaN # # Lab ID Dated material depth_bot (mm) depth_top (mm) 14C age (bp) age14C (bp) age_error (years) (1 sigma) modelled calibrated age (cal BP) 2-sigma error of cal age (years) cal_age_range_old (bp) cal_age_range_young (bp) depth (mm) thickness (mm) notes # EPOC, Bordeaux, France 210Pb NaN 0 NaN NA NA -56 NA NA NA NA NA AI07-04BC (boxcore) was 210 PB dated # AAR-12702 Mixed benthic foraminiferal assemblage 370 350 NA 1181 35 620 68 721 504 360 20 AI07-03G # AAR-16629 Shell 450 440 153 1481 24 Outlier NA 1032 734 445 10 AI07-03G # AAR-12268 Mixed benthic foraminiferal assemblage 610 600 233 1516 30 910 80 1075 755 605 10 AI07-03G # AAR-16630 Shell 890 880 473 1785 35 1204 85 1334 1043 885 10 AI07-03G # AAR-16623 Shell 1110 1100 540 1940 26 1423 92 1507 1233 1105 10 AI07-03G # AAR-16624 Shell 1215 1205 650 2131 27 1566 96 1715 1378 1210 10 AI07-03G # AAR-12703 Mixed benthic foraminiferal assemblage 1520 1510 846 2463 38 1979 107 2131 1766 1515 10 AI07-03G # #--------------------------------------- # 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_cm depth,,, cm,,,middle of sample,,N ## age_AD age,,,years AD,,,,,N ## SST-uk37.lspr sea-surface temeprature estimation,alkenones,,degrees C,late spring,,,Calibration: PRA1988; Alkenone calibration to SST (Prahl et al., 1988),N ## notes notes,,,,,,,,C #---------------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NA depth_cm age_AD SST-uk37.lspr notes 0.25 2006 5.0 AI07-04BC 0.75 2005 5.1 AI07-04BC 1.25 2004 4.3 AI07-04BC 1.75 2003 4.6 AI07-04BC 2.5 2001 5.1 AI07-04BC 3.5 1999 4.5 AI07-04BC 4.5 1997 4.7 AI07-04BC 5.5 1994 4.5 AI07-04BC 6.5 1992 4.5 AI07-04BC 7.5 1990 4.6 AI07-04BC 8.5 1987 4.8 AI07-04BC 9.5 1985 5.4 AI07-04BC 10.5 1983 5.1 AI07-04BC 11.5 1980 5.4 AI07-04BC 12.5 1978 4.9 AI07-04BC 13.5 1976 5.0 AI07-04BC 14.5 1973 4.7 AI07-04BC 15.5 1971 5.0 AI07-04BC 16.5 1969 5.0 AI07-04BC 17.5 1966 4.8 AI07-04BC 18.5 1964 5.1 AI07-04BC 19.5 1962 5.0 AI07-04BC 20.5 1960 5.2 AI07-04BC 21.5 1957 5.0 AI07-04BC 22.5 1955 5.1 AI07-04BC 23.5 1953 5.2 AI07-04BC 24.5 1950 5.0 AI07-04BC 25.5 1948 4.8 AI07-04BC 26.5 1946 5.2 AI07-04BC 27.5 1943 4.9 AI07-04BC 28.5 1941 5.3 AI07-04BC 29.5 1939 5.1 AI07-04BC 30.5 1936 5.0 AI07-04BC 31.5 1934 4.9 AI07-04BC 0.5 1721 5.1 AI07-03G 0.75 1718 5.3 AI07-03G 1.25 1712 5.3 AI07-03G 1.75 1706 5.2 AI07-03G 2.25 1700 5.2 AI07-03G 2.5 1698 5.0 AI07-03G 2.75 1695 4.5 AI07-03G 3.25 1689 4.9 AI07-03G 3.75 1684 4.9 AI07-03G 4.25 1679 4.6 AI07-03G 4.5 1676 5.1 AI07-03G 4.75 1674 4.8 AI07-03G 5.25 1668 4.6 AI07-03G 5.75 1663 4.7 AI07-03G 6.25 1657 4.8 AI07-03G 6.5 1655 5.2 AI07-03G 6.75 1652 5.0 AI07-03G 7.25 1646 5.1 AI07-03G 7.75 1641 4.8 AI07-03G 8.25 1635 5.4 AI07-03G 8.5 1633 5.0 AI07-03G 8.75 1630 5.2 AI07-03G 9.25 1624 4.8 AI07-03G 9.75 1619 5.3 AI07-03G 10.25 1613 5.3 AI07-03G 10.5 1611 5.6 AI07-03G 10.75 1608 5.2 AI07-03G 11.25 1602 5.2 AI07-03G 11.75 1597 5.1 AI07-03G 12.25 1591 5.1 AI07-03G 12.5 1589 5.2 AI07-03G 12.75 1586 5.2 AI07-03G 13.25 1580 5.2 AI07-03G 13.75 1575 5.1 AI07-03G 14.25 1569 5.3 AI07-03G 14.5 1566 5.2 AI07-03G 14.75 1563 5.2 AI07-03G 15.25 1557 5.1 AI07-03G 15.75 1552 5.8 AI07-03G 16.25 1546 5.2 AI07-03G 16.5 1544 4.7 AI07-03G 16.75 1541 5.2 AI07-03G 17.25 1535 5.1 AI07-03G 17.75 1530 5.3 AI07-03G 18.25 1524 5.4 AI07-03G 18.5 1522 5.1 AI07-03G 18.75 1519 5.3 AI07-03G 19.25 1513 5.4 AI07-03G 19.75 1508 5.3 AI07-03G 20.25 1502 5.8 AI07-03G 20.5 1500 5.0 AI07-03G 20.75 1497 5.4 AI07-03G 21.25 1491 5.3 AI07-03G 21.75 1486 5.1 AI07-03G 22.25 1480 4.9 AI07-03G 22.5 1478 6.1 AI07-03G 22.75 1475 6.3 AI07-03G 23.25 1469 6.0 AI07-03G 23.75 1464 5.3 AI07-03G 24.25 1458 7.8 AI07-03G 24.5 1456 6.0 AI07-03G 24.75 1453 4.9 AI07-03G 25.25 1447 4.6 AI07-03G 25.75 1442 4.7 AI07-03G 26.25 1436 4.9 AI07-03G 26.5 1434 5.2 AI07-03G 26.75 1431 4.6 AI07-03G 27.25 1425 5.0 AI07-03G 27.75 1420 5.2 AI07-03G 28.25 1414 5.2 AI07-03G 28.5 1412 5.5 AI07-03G 28.75 1409 4.6 AI07-03G 29.25 1403 5.3 AI07-03G 29.75 1398 4.8 AI07-03G 30.25 1392 5.7 AI07-03G 30.5 1390 4.9 AI07-03G 30.75 1387 5.1 AI07-03G 31.25 1381 4.9 AI07-03G 31.75 1376 5.9 AI07-03G 32.25 1370 5.2 AI07-03G 32.5 1368 5.0 AI07-03G 32.75 1365 4.9 AI07-03G 33.25 1359 5.3 AI07-03G 33.75 1353 5.3 AI07-03G 34.25 1347 5.3 AI07-03G 34.5 1345 4.8 AI07-03G 34.75 1342 4.9 AI07-03G 36.5 1320 4.7 AI07-03G 37.25 1308 4.5 AI07-03G 37.75 1303 4.7 AI07-03G 38.25 1298 4.6 AI07-03G 38.5 1295 4.9 AI07-03G 38.75 1292 4.6 AI07-03G 39.25 1287 4.8 AI07-03G 39.75 1282 5.0 AI07-03G 40.25 1277 4.9 AI07-03G 40.5 1274 4.7 AI07-03G 40.75 1271 4.8 AI07-03G 41.25 1266 4.7 AI07-03G 41.75 1261 4.8 AI07-03G 42.25 1255 4.9 AI07-03G 42.5 1252 4.9 AI07-03G 42.75 1249 4.7 AI07-03G 43.25 1243 4.7 AI07-03G 43.75 1238 4.7 AI07-03G 44.25 1232 4.7 AI07-03G 44.75 1226 4.7 AI07-03G 45.25 1220 5.0 AI07-03G 45.75 1215 4.9 AI07-03G 46.25 1209 4.6 AI07-03G 46.5 1206 4.6 AI07-03G 47.25 1197 5.2 AI07-03G 47.75 1191 5.3 AI07-03G 48.25 1185 5.2 AI07-03G 48.5 1183 5.3 AI07-03G 48.75 1180 5.1 AI07-03G 49.25 1174 5.0 AI07-03G 49.75 1168 5.0 AI07-03G 50.25 1162 5.1 AI07-03G 50.5 1160 5.0 AI07-03G 50.75 1157 5.1 AI07-03G 51.25 1151 4.7 AI07-03G 51.75 1145 4.8 AI07-03G 52.25 1139 4.8 AI07-03G 52.5 1137 5.1 AI07-03G 53.25 1128 4.7 AI07-03G 53.75 1122 4.6 AI07-03G 54.25 1116 4.6 AI07-03G 54.5 1114 5.2 AI07-03G 54.75 1111 4.7 AI07-03G 55.25 1105 4.7 AI07-03G 55.75 1099 4.7 AI07-03G 56.25 1094 4.8 AI07-03G 56.5 1091 5.1 AI07-03G 56.75 1088 4.8 AI07-03G 57.25 1082 4.9 AI07-03G 57.75 1076 4.7 AI07-03G 58.25 1070 5.1 AI07-03G 58.5 1068 5.1 AI07-03G 58.75 1065 5.3 AI07-03G 59.75 1053 5.2 AI07-03G 60.25 1047 5.2 AI07-03G 60.5 1043 5.1 AI07-03G 60.75 1040 5.0 AI07-03G 61.25 1032 4.7 AI07-03G 61.75 1024 5.0 AI07-03G 62.5 1015 5.0 AI07-03G 62.75 1013 5.5 AI07-03G 63.25 1008 5.4 AI07-03G 63.75 1003 5.4 AI07-03G 64.25 997 6.0 AI07-03G 64.5 995 5.2 AI07-03G 64.75 992 5.5 AI07-03G 65.25 987 5.4 AI07-03G 65.5 984 5.4 AI07-03G 65.75 982 5.7 AI07-03G 66.25 977 5.5 AI07-03G 66.75 972 5.7 AI07-03G 67.25 966 5.9 AI07-03G 67.75 961 5.5 AI07-03G 68.25 955 5.4 AI07-03G 68.5 952 5.1 AI07-03G 68.75 949 5.2 AI07-03G 69.25 943 5.6 AI07-03G 69.75 938 5.5 AI07-03G 70.25 932 5.3 AI07-03G 70.5 929 5.2 AI07-03G 70.75 926 5.5 AI07-03G 71.25 920 5.5 AI07-03G 71.75 915 5.6 AI07-03G 72.25 909 5.9 AI07-03G 72.5 907 5.6 AI07-03G 72.75 904 5.4 AI07-03G 73.25 898 5.4 AI07-03G 73.75 892 5.4 AI07-03G 74.25 886 5.5 AI07-03G 74.5 884 5.1 AI07-03G 74.75 881 5.3 AI07-03G 75.25 875 5.4 AI07-03G 75.75 869 4.3 AI07-03G 76.25 863 5.5 AI07-03G 76.5 861 5.1 AI07-03G 76.75 858 5.3 AI07-03G 77.25 852 5.8 AI07-03G 77.75 847 5.6 AI07-03G 78.25 841 5.3 AI07-03G 78.5 838 5.3 AI07-03G 78.75 835 5.8 AI07-03G 79.25 829 5.6 AI07-03G 79.75 824 5.5 AI07-03G 80.25 818 5.4 AI07-03G 80.5 815 5.1 AI07-03G 80.75 812 5.6 AI07-03G 81.25 806 5.6 AI07-03G 82.25 795 5.5 AI07-03G 82.5 793 5.1 AI07-03G 82.75 790 5.3 AI07-03G 83.25 784 5.4 AI07-03G 83.75 778 5.3 AI07-03G 84.25 772 5.3 AI07-03G 84.5 770 5.5 AI07-03G 84.75 767 5.2 AI07-03G 85.25 761 5.3 AI07-03G 85.75 755 5.0 AI07-03G 86.25 749 5.4 AI07-03G 86.5 747 5.0 AI07-03G 86.75 744 5.5 AI07-03G 87.25 738 5.3 AI07-03G 87.75 733 5.2 AI07-03G 88.25 727 5.3 AI07-03G 88.5 724 5.2 AI07-03G 88.75 721 5.4 AI07-03G 89.25 715 5.5 AI07-03G 89.75 710 5.4 AI07-03G 90.25 704 5.6 AI07-03G 90.5 701 5.4 AI07-03G 90.75 698 5.3 AI07-03G 91.25 692 6.1 AI07-03G 91.75 687 6.2 AI07-03G 92.25 681 5.5 AI07-03G 92.5 679 5.2 AI07-03G 92.75 676 5.5 AI07-03G 93.25 670 5.4 AI07-03G 93.75 664 5.3 AI07-03G 94.25 658 5.3 AI07-03G 94.5 656 5.2 AI07-03G 94.75 653 5.3 AI07-03G 95.25 647 5.7 AI07-03G 95.75 641 5.3 AI07-03G 96.25 637 5.7 AI07-03G 96.5 633 5.4 AI07-03G 96.75 630 5.6 AI07-03G 97.25 624 5.5 AI07-03G 97.75 619 3.5 AI07-03G 98.25 613 5.3 AI07-03G 98.5 610 5.2 AI07-03G 98.75 607 5.5 AI07-03G 99.25 601 5.3 AI07-03G 99.75 596 5.3 AI07-03G 100.25 590 5.5 AI07-03G 100.5 587 5.3 AI07-03G 100.75 584 5.2 AI07-03G 101.25 578 5.3 AI07-03G 101.75 573 5.4 AI07-03G 102.25 567 5.4 AI07-03G 102.5 564 5.1 AI07-03G 102.75 561 5.3 AI07-03G 103.25 555 5.6 AI07-03G 103.75 550 5.8 AI07-03G 104.25 544 6.3 AI07-03G 104.5 541 5.3 AI07-03G 104.75 538 5.8 AI07-03G 105.25 532 5.1 AI07-03G 106.25 521 5.1 AI07-03G 106.5 518 5.1 AI07-03G 106.75 515 5.4 AI07-03G 107.25 509 5.1 AI07-03G 107.75 504 5.0 AI07-03G 108.25 498 5.0 AI07-03G 108.5 495 5.4 AI07-03G 108.75 492 5.3 AI07-03G 109.25 486 5.4 AI07-03G 109.75 481 5.4 AI07-03G 110.25 475 5.1 AI07-03G 110.5 472 5.4 AI07-03G 110.75 469 5.3 AI07-03G 111.25 463 5.2 AI07-03G 111.75 458 5.2 AI07-03G 112.25 452 5.2 AI07-03G 112.5 450 5.4 AI07-03G 112.75 447 5.1 AI07-03G 113.25 441 5.2 AI07-03G 113.75 435 5.1 AI07-03G 114.25 429 5.7 AI07-03G 114.5 427 5.5 AI07-03G 114.75 424 5.2 AI07-03G 115.25 418 5.2 AI07-03G 115.75 412 5.5 AI07-03G 116.25 406 5.2 AI07-03G 116.5 404 5.4 AI07-03G 116.75 401 5.5 AI07-03G 117.25 395 5.4 AI07-03G 117.75 390 5.2 AI07-03G 118.25 384 5.1 AI07-03G 118.5 381 5.1 AI07-03G 118.75 378 5.0 AI07-03G 119.25 372 4.9 AI07-03G 119.75 367 5.2 AI07-03G 120.25 361 5.0 AI07-03G 120.5 358 4.5 AI07-03G 120.75 355 4.8 AI07-03G 121.25 349 4.9 AI07-03G 121.75 344 5.4 AI07-03G 122.25 338 5.3 AI07-03G 122.5 336 4.6 AI07-03G 122.75 333 5.1 AI07-03G 123.25 327 5.3 AI07-03G 123.75 321 5.1 AI07-03G 124.25 315 5.0 AI07-03G 124.5 313 5.6 AI07-03G 124.75 310 5.5 AI07-03G 125.25 304 5.3 AI07-03G 125.75 298 4.8 AI07-03G 126.25 292 4.6 AI07-03G 126.5 290 5.5 AI07-03G 126.75 287 5.1 AI07-03G 127.25 281 5.1 AI07-03G 127.75 275 5.2 AI07-03G 128.25 269 5.2 AI07-03G 128.5 267 5.4 AI07-03G 128.75 264 5.3 AI07-03G 129.25 258 5.3 AI07-03G 129.75 252 5.3 AI07-03G 130.5 244 5.7 AI07-03G 130.75 241 5.5 AI07-03G 131.25 235 5.3 AI07-03G 131.75 229 5.5 AI07-03G 132.5 221 4.7 AI07-03G 132.75 218 5.5 AI07-03G 133.25 212 5.6 AI07-03G 133.75 207 5.2 AI07-03G 134.25 201 5.3 AI07-03G 134.5 200 5.3 AI07-03G 134.75 198 5.3 AI07-03G 135.25 195 5.3 AI07-03G 135.75 184 5.2 AI07-03G 136.25 178 5.3 AI07-03G 136.5 175 5.4 AI07-03G 136.75 172 5.3 AI07-03G 137.25 166 5.2 AI07-03G 137.75 161 5.8 AI07-03G 138.25 155 5.8 AI07-03G 138.5 153 5.5 AI07-03G 138.75 149 5.6 AI07-03G 139.25 143 5.6 AI07-03G 139.75 138 5.7 AI07-03G 140.25 132 5.3 AI07-03G 140.5 130 4.9 AI07-03G 140.75 126 5.6 AI07-03G 141.25 120 5.5 AI07-03G 141.75 115 5.6 AI07-03G 142.25 109 5.8 AI07-03G 142.5 107 5.3 AI07-03G 142.75 104 6.1 AI07-03G 143.25 98 6.0 AI07-03G 143.75 93 5.8 AI07-03G 144.25 87 5.5 AI07-03G 144.5 84 4.9 AI07-03G 144.75 81 5.5 AI07-03G 145.25 75 5.6 AI07-03G 145.75 70 5.5 AI07-03G 146.25 64 5.1 AI07-03G 146.75 59 5.6 AI07-03G 147.75 48 5.5 AI07-03G 148.25 42 6.0 AI07-03G 148.5 39 5.5 AI07-03G 148.75 36 6.2 AI07-03G 149.25 30 6.0 AI07-03G 149.75 24 5.9 AI07-03G 150.25 18 5.9 AI07-03G 150.5 16 5.7 AI07-03G 150.75 8 6.2 AI07-03G