{"NOAAStudyId":"24930","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2018-08-20","dataPublisher":"NOAA","dataType":"PALEOLIMNOLOGY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/lake","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-24930.xml","doi":null,"earliestYearBP":10283,"earliestYearCE":-8333,"entryId":"noaa-lake-24930","funding":[{"fundingAgency":"Icelandic Centre of Research","fundingGrant":"163431051, 130775051, 141573052"}],"investigators":"Harning, D.J.; Geirsdóttir, A.; Miller, G.H.","mostRecentYearBP":-67,"mostRecentYearCE":2017,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/24930","originalSource":null,"publication":[{"abstract":"Emerging Holocene paleoclimate datasets point to a non-linear response of Icelandic climate against a background of steady orbital cooling. The Vestfirðir peninsula (NW Iceland) is an ideal target for continued climate reconstructions due to the presence of a small ice cap (Drangajökull) and numerous lakes, which provide two independent means to evaluate existing Icelandic climate records and to constrain the forcing mechanisms behind centennial-scale cold anomalies. Here, we present new evidence for Holocene expansions of Drangajökull based on 14C dates from entombed dead vegetation as well as two continuous Holocene lake sediment records. Lake sediments were analyzed for both bulk physical (MS) and biological (%TOC, d13C, C/N, and BSi) parameters. Composite BSi and C/N records from the two lakes yield a sub-centennial qualitative perspective on algal (diatom) productivity and terrestrial landscape stability, respectively. The Vestfirðir lake proxies suggest initiation of the Holocene Thermal Maximum by ~8.8 ka with subsequent and pronounced cooling not apparent until ~3 ka. Synchronous periods of reduced algal productivity and accelerated landscape instability point to cold anomalies centered at ~8.2, 6.6, 4.2, 3.3, 2.3, 1.8, 1, and 0.25 ka. Triggers for cold anomalies are linked to variable combinations of freshwater pulses, low total solar irradiance, explosive and effusive volcanism, and internal modes of climate variability, with cooling likely sustained by ocean/sea-ice feedbacks. The climate evolution reflected by our glacial and organic proxy records corresponds closely to marine records from the North Iceland Shelf.","author":{"name":"David J. Harning, Áslaug Geirsdóttir, Gifford H. Miller"},"citation":"David J. Harning, Áslaug Geirsdóttir, Gifford H. Miller. 2018. Punctuated Holocene climate of Vestfirðir, Iceland, linked to internal/external variables and oceanographic conditions. Quaternary Science Reviews, 189, 31-42. doi: 10.1016/j.quascirev.2018.04.009","edition":null,"identifier":{"id":"10.1016/j.quascirev.2018.04.009","type":"doi","url":"http://dx.doi.org/10.1016/j.quascirev.2018.04.009"},"issue":null,"journal":"Quaternary Science Reviews","pages":"31-42","pubRank":"1","pubYear":2018,"reportNumber":null,"title":"Punctuated Holocene climate of Vestfirðir, Iceland, linked to internal/external variables and oceanographic conditions","type":"publication","volume":"189"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57695","geo":{"geoType":"Feature","geometry":{"coordinates":["66.25627","-22.32213"],"type":"POINT"},"properties":{"easternmostLongitude":"-22.32213","maxElevationMeters":"183","minElevationMeters":"183","northernmostLatitude":"66.25627","southernmostLatitude":"66.25627","westernmostLongitude":"-22.32213"}},"locationName":"Continent>Europe>Northern 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