# 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/moossen2015ph.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: Moossen2015pH # 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 ## pHsoil pH Soil, cyclisation ratio (CBT), 0.044 1S SD,,,Paleoceanography,, CBT values were converted to soil pH 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 pHsoil 310 7.9611 321 8.0612 331 8.1048 341 8.0438 350 8.0245 360 8.0059 369 8.0376 379 7.952 388 7.945 398 7.9914 408 7.9245 417 7.9599 443 7.9165 467 7.8108 491 7.8631 515 7.9091 539 7.8761 563 7.8844 587 7.8616 611 7.815 635 7.8316 659 7.8608 683 7.8739 707 7.8833 731 7.8276 752 7.8339 775 7.8206 797 7.8695 819 7.7917 841 7.9019 864 7.9114 886 7.8685 930 7.8265 952 7.8117 975 7.8644 997 7.8732 1015 7.8447 1029 7.8308 1044 7.8885 1059 7.9947 1074 7.8411 1089 8.0653 1105 7.9518 1120 8.2605 1135 7.7396 1150 7.9654 1165 7.8995 1182 8.0484 1208 8.0047 1233 8.0907 1258 7.96 1283 7.8426 1307 7.7227 1332 7.7109 1413 7.8713 1465 7.8233 1516 7.6481 1542 7.8292 1568 7.941 1594 7.8698 1619 7.888 1645 7.9267 1671 7.7975 1697 7.6882 1722 7.5942 1746 7.7565 1771 7.755 1821 7.7791 1846 7.7021 1871 7.6534 1946 7.7649 1970 7.7415 1995 7.8932 2020 7.7948 2045 7.7268 2070 7.761 2095 7.8175 2120 7.8959 2145 7.8804 2168 7.8574 2212 7.8354 2263 7.8951 2313 7.9354 2363 7.816 2413 7.8208 2463 7.7148 2513 7.8705 2563 7.7728 2614 7.6602 2664 7.5967 2714 7.7053 2764 7.7403 2814 7.6945 2864 7.7979 2915 7.9004 2965 7.7174 3015 7.8594 3065 7.7824 3165 7.7386 3215 7.6635 3266 7.7933 3301 7.6892 3330 7.8237 3364 7.7699 3398 7.8419 3432 7.7536 3467 7.7362 3501 7.7419 3535 7.7911 3569 7.7783 3603 7.7998 3638 7.816 3683 7.9036 3717 7.689 3751 7.7443 3785 7.7402 3820 7.7183 3854 7.8103 3922 7.4948 3956 7.7302 3991 7.6866 4025 7.8061 4059 7.7759 4093 7.7765 4128 7.8756 4162 7.7881 4196 7.786 4264 7.8207 4299 7.8621 4333 7.7585 4367 7.5573 4401 7.6631 4436 7.764 4470 7.7582 4504 7.6778 4538 7.8824 4572 7.7295 4607 7.7763 4641 7.8501 4675 7.7914 4744 7.6175 4816 7.8028 4980 7.7374 5062 7.7137 5144 7.7332 5226 7.6611 5309 7.8259 5391 7.8734 5473 7.8254 5555 7.9635 5719 7.7135 5801 7.8862 5883 7.8462 5965 7.8619 6047 7.89 6129 7.9799 6211 7.8066 6293 7.9397 6375 7.8308 6457 7.8495 6555 7.8226 6605 7.8311 6655 7.8396 6705 7.8878 6806 7.8528 6856 7.7356 6906 7.8457 6956 7.7252 7056 7.78 7107 7.7797 7158 7.8299 7208 7.8288 7299 7.928 7320 7.9113 7336 7.9052 7382 8.0457 7397 8.0221 7412 8.0088 7427 8.0447 7442 7.8657 7473 7.9956 7503 7.9583 7548 7.8762 7563 7.93 7578 7.8398 7594 7.9198 7609 7.8481 7654 7.7482 7669 7.8709 7684 7.8358 7700 7.7898 7715 7.9901 7745 7.8821 7760 7.84 7790 7.877 7805 7.8958 7821 7.8863 7836 8.0168 7851 8.0151 7866 8.0334 7881 7.8864 7896 7.946 7911 7.8998 7927 8.0047 7942 7.9601 7957 7.9943 7972 7.9247 7987 7.922 8002 7.9477 8017 8.0038 8032 7.9384 8048 7.7551 8063 7.9096 8078 7.8435 8093 8.1834 8108 7.9859 8123 7.8503 8138 7.9014 8153 7.9962 8168 8.0385 8213 8.2925 8232 7.8571 8248 7.7647 8263 8.0075 8278 7.9466 8295 8.0879 8310 8.0425 8325 7.9409 8340 7.9081 8355 7.9801 8370 7.9846 8386 7.9705 8401 7.969 8416 8.1072 8431 7.94 8446 8.0798 8461 7.9313 8476 8.0107 8491 8.1085 8506 7.908 8522 8.122 8537 8.0434 8552 8.0552 8568 7.9092 8583 8.0404 8598 7.9951 8614 8.1017 8629 8.3058 8644 8.0947 8659 7.8925 8674 7.9772 8689 7.9883 8704 8.0354 8719 7.9163 8734 7.7598 8749 7.8931 8765 7.8688 8780 7.9193 8795 7.9579 8810 8.1144 8842 8.1304 8893 8.1485 8943 8.0699 8994 7.9701 9045 8.0324 9095 7.986 9146 8.0696 9196 8.1075 9247 8.039 9297 7.8521 9348 7.855 9399 7.9081 9449 7.8934 9508 7.7107 9550 7.9813 9600 7.9606 9653 7.9538 9702 7.9991 9748 8.1253 9797 8.0751 9847 8.0641 9897 8.0005 9947 8.0627 9996 8.0579 10046 8.0549 10093 8.0772 10143 8.2423 10182 8.1193 10253 8.1406 10302 8.1758 10351 8.2354 10400 8.0764 10449 8.1978 10498 8.1109 10548 8.1003 10597 8.1892 10646 8.0901 10695 7.9616 10744 8.0218