Ayr Lake, Baffin Island 570Yr Leaf Wax Hydrogen Isotope and Varve Data https://data.eol.ucar.edu/dataset/106.461 Summary A multiproxy paleoclimate record is presented using leaf wax hydrogen isotopes (d2Hwax) and varve thickness from Arctic proglacial lake sediments. Also provided is one of the first evaluations of the utility of d2Hwax as a paleoclimate proxy in Arctic proglacial lakes. Comparison of varve thickness and d2Hwax at sub-decadal resolution from 1948 to 2004 AD, and at sub-centennial resolution from 1450 to 2004 AD is made. Varve thickness and d2Hwax both contain large interannual variability and are anti-correlated during the late twentieth century, suggesting that both proxies respond rapidly, but by different mechanisms, to catchment-scale forcings. At longer time scales, varve thickness exhibits a strong response to Little Ice Age cooling (1661-1827 AD in this record) but does not show evidence for twentieth century warming recorded throughout the Arctic. d2Hwax does record regional- scale temperature changes, with more 2H-depleted values during the Little Ice Age and an abrupt change to more 2H-enriched values in the twentieth century. This corresponds well with a recent Arctic-wide temperature reconstruction in which the seventeenth century is the coldest interval, and the twentieth century is the warmest interval. The results suggest that d2Hwax is a promising proxy that can be applied at high resolution in proglacial Arctic lakes. Identifiers * Local archive identifier: 106.461 Citation Thomas, E., et al. 2015. Ayr Lake, Baffin Island 570Yr Leaf Wax Hydrogen Isotope and Varve Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://data.eol.ucar.edu/dataset/106.461 Accessed 24 Apr 2024. If you plan to cite this dataset in a publication, please email us at: datahelp@eol.ucar.edu We may be able to provide an updated citation that includes a DOI. Acknowledgement In addition to the citation reference and any other acknowledgements, please acknowledge NCAR/EOL in your publications with text such as: Data provided by NCAR/EOL under the sponsorship of the National Science Foundation. https://data.eol.ucar.edu/ Related projects * ARCSS: NSF Arctic System Science https://data.eol.ucar.edu/project/ARCSS Additional information * Spatial Type: point * Frequency: continuous * Language: English ISO Topic Categories * climatologyMeteorologyAtmosphere Categories * Arctic * Biology * Ecology * Sediment Platforms * Field Surveys Instruments * Mass Spectrometers GCMD Science Keywords * EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > OCEAN/LAKE RECORDS > ISOTOPES * EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > OCEAN/LAKE RECORDS > SEDIMENTS Related links * download: Ayr Lake, Baffin Island 570Yr Leaf Wax Hydrogen Isotope and Varve Data https://www.ncdc.noaa.gov/paleo-search/study/13114 * info: ARCSS Data Policy https://data.eol.ucar.edu/arctic_projects/arcss/Data_Policy.html * homepage: ARCSS EOL Webpage https://www.eol.ucar.edu/field_projects/arcss Temporal coverage * Begin datetime: 1433-01-01 00:00:00 * End datetime: 2004-12-31 23:59:59 Spatial coverage * Maximum (North) Latitude: 70.459 * Minimum (South) Latitude: 70.459 * Minimum (West) Longitude: -70.086 * Maximum (East) Longitude: -70.086 Primary contact information * pointOfContact: Jason Briner https://data.eol.ucar.edu/contact/show/1666 Additional contact information * principalInvestigator: Jason Briner https://data.eol.ucar.edu/contact/show/1666 * author: Elizabeth K. Thomas https://data.eol.ucar.edu/contact/show/1825 * author: Sean McGrane https://data.eol.ucar.edu/contact/show/1826 * author: Jason Briner https://data.eol.ucar.edu/contact/show/1666 * author: Yongsong Huang https://data.eol.ucar.edu/contact/show/1827 Alternate metadata formats * DataCite: https://data.eol.ucar.edu/dataset/106.461?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/106.461?format=isotc211