# Northwest Iceland Holocene Biomarker Data and Climate Reconstructions #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # # 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/20023 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/moossen2015/moossen2015mat.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleoceanography # # Parameter_Keywords: ACL25-35; soil-pH; C29-dD, Iceland, Holocene #--------------------------------------- # Contribution_Date # Date: 2016-04-15 #--------------------------------------- # Title # Study_Name: Northwest Iceland Holocene Biomarker Data and Climate Reconstructions #--------------------------------------- # Investigators # Investigators: Moossen, H; Bendle, J; Seki, O; Quillmann, U; Kawamura, K #--------------------------------------- # Description and Notes # Description: Northwest Iceland Holocene sea surface temperature and mean air temperature reconstructed using soil-pH, # ACL25-35 variability, and the hydrogen isotopic composition of the C29 n-alkane from sediment core MD99-2266, # Isafjardardjup Fjord, Denmark Strait. #--------------------------------------- # Publication # Authors: Heiko Moossen, James Bendle, Osamu Seki, Ursula Quillmann, Kimitaka Kawamura # Published_Date_or_Year: 2015-12-01 # Published_Title: North Atlantic Holocene climate evolution recorded by high-resolution terrestrial and marine biomarker records # Journal_Name: Quaternary Science Reviews # Volume: 129 # Edition: # Issue: # Pages: 111-127 # Report Number: # DOI: 10.1016/j.quascirev.2015.10.013 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S0277379115301372 # Full_Citation: # Abstract: Holocene climatic change is driven by a plethora of forcing mechanisms acting on different time scales, including: insolation, internal ocean (e.g. Atlantic Meridional Overturning Circulation; AMOC) and atmospheric (e.g. North Atlantic Oscillation; NAO) variability. However, it is unclear how these driving mechanisms interact with each other. Here we present five, biomarker based, paleoclimate records (air-, sea surface temperature and precipitation), from a fjordic sediment core, revealing North Atlantic terrestrial and marine climate in unprecedented detail. The Early Holocene (10.7-7.8 kyrs BP) is characterised by relatively high air temperatures while SSTs are dampened by melt water events, and relatively low precipitation. The Middle Holocene (7.8-3.2 kyrs BP) is characterised by peak SSTs, declining air temperatures and high precipitation. A pronounced marine thermal maximum occurs between ~7-5.5 kyrs BP, 3000 years after the terrestrial thermal maximum, driven by melt water cessation and an accelerating AMOC. The neoglacial cooling, between 5.8 and 3.2 kyrs BP leads into the late Holocene. We demonstrate that an observed modern link between Icelandic precipitation variability during different NAO phases, may have existed from ~7.5 kyrs BP. A simultaneous decoupling of both air, and sea surface temperature records from declining insolation at ~3.2 kyrs BP may indicate a threshold, after which internal feedback mechanisms, namely the NAO evolved to be the primary drivers of Icelandic climate on centennial time-scales. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Scottish Alliance for Geoscience, Environment and Society # Grant: #--------------------------------------- # Site Information # Site_Name: MD99-2266 # Location: Ocean>Atlantic Ocean>North Atlantic Ocean # Country: # Northernmost_Latitude: 66.2295 # Southernmost_Latitude: 66.2295 # Easternmost_Longitude: -23.2655 # Westernmost_Longitude: -23.2655 # Elevation: -106 m #--------------------------------------- # Data_Collection # Collection_Name: Moossen2015MAT # First_Year: 10744 # Last_Year: 310 # Time_Unit: cal yr BP # Core_Length: 38.90 # Notes: #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## age_calBP age, , , calendar years before present, , , , ,N ## temp-ann surface temperature, CBT/MBT', 0.5 1sigma-SD, degrees centigrade, , Climate Reconstructions, ,CBT/MBT' values were converted to SSTs using the calibration equation published by Peterse et al. (2012),N # #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # age_calBP temp-ann 310 10.0219 321 10.7318 331 11.4423 341 11.8609 350 11.928 360 11.0381 369 12.1334 379 10.0639 388 11.2553 398 10.2849 408 9.9538 417 9.3336 443 9.5183 467 8.6221 491 8.9308 515 9.3197 539 7.2235 563 8.9197 587 8.7125 611 8.5831 635 7.6474 659 8.7077 683 8.0427 707 9.0666 731 8.498 752 8.7206 775 8.2846 797 9.4653 819 8.2596 841 9.9074 864 10.3807 886 9.8207 930 9.4118 952 9.9853 975 10.1901 997 10.0837 1015 9.5877 1029 9.2039 1044 9.9725 1059 9.5953 1074 9.5106 1089 10.9835 1105 9.584 1120 8.8676 1135 9.3623 1150 10.7392 1165 9.8479 1182 10.5858 1208 10.5992 1233 11.2829 1258 10.7198 1283 9.4754 1307 8.6864 1332 9.3156 1413 10.0874 1465 9.7617 1516 9.4306 1542 9.8296 1568 9.1421 1594 9.7626 1619 8.9631 1645 9.5892 1671 8.3885 1697 8.4542 1722 8.303 1746 8.7957 1771 8.8276 1821 8.5322 1846 9.156 1871 9.4503 1946 9.0227 1970 8.417 1995 10.2655 2020 8.3505 2045 7.933 2070 8.1126 2095 8.8551 2120 9.0862 2145 9.3902 2168 9.0903 2212 9.8201 2263 9.6068 2313 9.4238 2363 9.6014 2413 8.9193 2463 9.0764 2513 10.8259 2563 8.4511 2614 9.0713 2664 10.3733 2714 10.0549 2764 11.0681 2814 9.1432 2864 10.2279 2915 9.7119 2965 8.1125 3015 8.8497 3065 9.0349 3165 9.1632 3215 9.1472 3266 9.5831 3301 9.206 3330 9.3621 3364 9.019 3398 9.0288 3432 9.5707 3467 10.1111 3501 8.7694 3535 8.2014 3569 9.7757 3603 10.3145 3638 9.6303 3683 9.9115 3717 10.3551 3751 10.3353 3785 10.2774 3820 10.2951 3854 9.8009 3922 11.0572 3956 10.2639 3991 9.6758 4025 10.6314 4059 9.8496 4093 10.2939 4128 10.7379 4162 10.4212 4196 10.3216 4264 10.2251 4299 10.0207 4333 11.2395 4367 11.4091 4401 11.6775 4436 10.2096 4470 11.0602 4504 11.421 4538 10.6991 4572 10.23 4607 10.4099 4641 11.7043 4675 10.9726 4744 10.1648 4816 10.7606 4980 11.3892 5062 10.744 5144 12.0601 5226 13.2 5309 12.6654 5391 13.1419 5473 12.5656 5555 12.4604 5719 11.6935 5801 13.0587 5883 12.7844 5965 12.5099 6047 12.0916 6129 13.8911 6211 12.7351 6293 12.9986 6375 12.8957 6457 12.809 6555 12.5835 6605 10.8984 6655 12.1254 6705 11.8753 6806 13.1001 6856 12.2226 6906 12.0874 6956 11.7356 7056 12.3794 7107 11.8225 7158 12.3492 7208 12.4597 7299 12.2679 7320 13.1509 7336 13.9019 7382 13.2977 7397 13.4607 7412 13.142 7427 13.6099 7442 12.9422 7473 13.0326 7503 12.3256 7548 13.0663 7563 13.674 7578 12.777 7594 11.7113 7609 11.6544 7654 12.032 7669 12.1192 7684 12.265 7700 11.4886 7715 12.8531 7745 12.055 7760 13.3352 7790 13.844 7805 14.2898 7821 12.0279 7836 13.9515 7851 13.917 7866 13.4526 7881 12.3782 7896 12.9526 7911 13.1734 7927 13.3988 7942 12.4304 7957 13.3146 7972 13.1003 7987 13.107 8002 11.4441 8017 13.51 8032 12.7713 8048 11.5401 8063 12.5472 8078 12.1787 8093 9.6606 8108 13.0178 8123 11.9368 8138 12.7215 8153 13.3008 8168 13.6971 8213 12.3276 8232 13.3363 8248 13.9909 8263 14.565 8278 14.253 8295 13.9644 8310 13.5504 8325 14.2054 8340 13.0911 8355 13.8541 8370 12.9616 8386 14.1909 8401 13.0896 8416 14.7356 8431 14.6373 8446 14.4242 8461 14.8666 8476 14.1668 8491 13.2563 8506 13.426 8522 15.7957 8537 14.6735 8552 14.5445 8568 13.59 8583 15.462 8598 15.2891 8614 14.3118 8629 15.9189 8644 15.3477 8659 14.5783 8674 13.8296 8689 14.2641 8704 15.0465 8719 15.0944 8734 14.962 8749 15.3631 8765 13.7189 8780 14.3589 8795 15.4419 8810 16.341 8842 15.43 8893 15.6454 8943 14.8221 8994 15.3028 9045 15.3069 9095 16.576 9146 16.3215 9196 16.3486 9247 15.1359 9297 13.6954 9348 13.3372 9399 13.8175 9449 14.2698 9508 11.5688 9550 14.3043 9600 15.0398 9653 14.4526 9702 14.8601 9748 16.6213 9797 16.1288 9847 16.2596 9897 15.0962 9947 15.1183 9996 14.4937 10046 16.329 10093 14.5143 10143 15.6962 10182 14.2989 10253 14.7523 10302 14.9695 10351 14.2002 10400 15.0881 10449 15.136 10498 15.2501 10548 14.0779 10597 14.018 10646 13.6617 10695 13.4005 10744 13.9423