# 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/moossen2015dd.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: Moossen2015dD # First_Year: 10351 # Last_Year: 321 # 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 ## d2HC29 delta deuterium, leaf wax derived C29 n-alkane, 4.7 1S SD, per mil VSMOW,,Paleoceanography,, C29-dD values were corrected for changes in global ice volume after Collins et al. (2003),N # #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # age_calBP d2HC29 321 -198.3203 331 -204.7893 350 -198.5033 360 -188.4738 379 -202.7689 398 -210.0869 443 -196.5047 467 -202.4166 515 -201.0685 539 -193.3995 563 -205.55 587 -205.2476 611 -198.0377 635 -198.3247 683 -202.385 707 -205.4467 731 -196.4304 752 -204.2382 775 -199.593 797 -201.1073 819 -196.9672 841 -200.5585 864 -200.1424 886 -202.0878 930 -196.4557 952 -199.1041 975 -210.5946 997 -188.5431 1015 -202.636 1029 -207.4954 1044 -201.4135 1059 -186.8155 1074 -182.3774 1120 -198.3396 1135 -185.3328 1150 -194.194 1165 -203.1943 1182 -179.1381 1359 -203.202 1413 -200.1394 1439 -190.3942 1465 -195.7519 1568 -198.9561 1671 -199.9514 1697 -193.3593 1722 -207.6042 1746 -213.6021 1921 -206.7725 1946 -198.609 2095 -205.0473 2120 -218.4472 2145 -201.4482 2168 -205.6242 2263 -195.3961 2664 -188.8708 2714 -176.7911 2814 -193.8694 2864 -199.6836 2915 -177.2628 2965 -192.4519 3015 -199.5305 3065 -197.9081 3165 -189.1595 3215 -196.3183 3266 -197.4626 3785 -194.2258 4162 -199.3294 4230 -197.7834 4367 -192.1415 4436 -188.8509 4470 -204.5541 4504 -198.4637 4572 -196.3181 4709 -196.1697 4816 -202.4151 5144 -201.6601 5473 -201.1568 5719 -202.5519 5965 -191.2769 6129 -194.2512 6293 -196.2895 6457 -194.0067 6605 -192.4893 7006 -200.5111 7107 -191.0764 7208 -198.2652 7299 -194.5229 7336 -190.3477 7382 -199.2636 7412 -192.7503 7442 -185.5656 7473 -194.0688 7503 -190.3128 7533 -199.1927 7563 -188.4084 7578 -190.613 7639 -194.0803 7669 -191.7864 7700 -196.6166 7730 -208.0685 7760 -178.6743 7790 -194.073 7821 -192.9556 7851 -202.8079 7881 -185.5502 7911 -182.7303 7942 -189.4462 8017 -188.271 8032 -193.0368 8063 -193.2165 8123 -204.2157 8183 -204.3435 8213 -196.108 8248 -205.9836 8278 -206.6568 8310 -199.4866 8340 -197.6467 8370 -193.6935 8431 -201.9661 8461 -197.0754 8491 -202.081 8522 -191.6109 8674 -188.8227 8704 -193.9938 8734 -200.5821 8765 -199.9437 8795 -205.6232 8842 -199.7165 8943 -193.5187 8994 -193.0388 9045 -186.1076 9146 -191.6029 9247 -193.944 9348 -191.0171 9449 -198.4601 9550 -194.8709 9653 -191.9858 9748 -196.7687 9847 -201.1338 10046 -191.3566 10253 -192.3835 10351 -191.9653