noaa-lake-20610 Wahoo Lake, Alaska 11,500 Year Physical Properties and Isotope Data Vachula, R.S.; Chipman, M.L.; Hu, F.S. Wahoo Lake, Alaska 11,500 Year Physical Properties and Isotope Data 2017-04-28 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20610 Investigator R.S. Vachula Investigator M.L. Chipman Investigator F.S. Hu earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 18O,bivalve,null,per mil VPDB,null,paleolimnology,null,null,N,Pisidium; error 0.15 per mil earth science paleoclimate paleolimnology density,sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology organic matter,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,LOI at 550C earth science paleoclimate paleolimnology calcium carbonate,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,LOI at 950C x (100/44) earth science paleoclimate paleolimnology delta 13C,bivalve,null,per mil VPDB,null,paleolimnology,null,null,N,Pisidium; error 0.1 per mil earth science paleoclimate paleolimnology water content,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,LOI at 120C earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology mineral matter,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,residual lithics and ash after 950C earth science paleoclimate paleolimnology oxygen isotopes earth science paleoclimate paleolimnology carbon isotopes earth science paleoclimate paleolimnology physical properties geoscientificInformation 11441 cal yr BP -63 cal yr BP Complete 69.076273 69.076273 -146.929724 -146.929724 700 700 Continent North America United States Of America Alaska Wahoo Lake>LATITUDE 69.076273>LONGITUDE -146.929724 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Richard S. Vachula, Melissa L. Chipman, Feng Sheng Hu 2017 The Holocene 10.1177/0959683617702230 http://journals.sagepub.com/eprint/YpNwYKjWe5bTJ824jDYG/full

Despite recent progress in understanding high-latitude climate variability, paleoclimate records are scarce from the Alaskan Arctic. We conducted isotopic and sediment analyses at Wahoo Lake to infer Holocene climate variability in northeastern Alaska. Water d18O and dD values from the lake and its inlet/outlet streams suggest that winter precipitation dominates modern water inputs and that evaporation has limited influence on the lake's hydrological budget. The isotopic composition of Pisidium exhibits marked variations during the past 11,500 years, with d18O ranging between -18.7 and -16.2 per mil and d13C between -7.1 and -2.3 per mil (Vienna Pee Dee Belemnite (VPDB)). Elevated d18O and sediment composition from 11.5 to 8.9 kcal. BP suggest evaporative 18O enrichment and arid conditions. Rising lake levels are evidenced by the disappearance of Pisidium and a transition to low-carbonate gyttja ca. 6.3 kcal. BP and by the onset of sediment deposition on an adjacent shelf by 5.3 kcal. BP. These changes coincided with enhanced effective moisture in interior and southern Alaska as inferred from lake-level records and may be related to broad-scale atmospheric circulation changes. In the shelf sediments, carbonate abundance increases markedly at 3.5 kcal. BP, and d18O increases from -18.0 to -16.5 per mil at 2.1 kcal. BP, possibly resulting from increased temperature and/or summer precipitation. After 2.1 kcal. BP, d18O fluctuates with an overall decreasing trend to -17.2 per mil at 0.9 kcal. BP. Late-Holocene variations in our d18O record display coherent patterns with regional glacier fluctuations at centennial to millennial scales, suggesting that d18O minima were related to a combination of low temperatures and enhanced winter snowfall. Holocene variations in organic matter abundance at Wahoo Lake also show broad similarities to total solar irradiance, implying that suborbital solar variability played a role in modulating regional climate and aquatic productivity. STUDY NOTES: Oxygen and carbon isotopes of Pisidium bivalves and lithological composition of sediments from Wahoo Lake, Brooks Foothills, Alaska.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/wahoo2017loi.txt Formatted Text Data File; Wahoo Lake Basin Core LOI Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/wahoo2017iso.txt Formatted Text Data File; Wahoo Lake Basin Core Pisidium Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/wahoo2017loi-shelf.txt Formatted Text Data File; Wahoo Lake Shelf Core LOI Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/wahoo2017iso-shelf.txt Formatted Text Data File; Wahoo Lake Shelf Core Pisidium Stable Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11