noaa-lake-5468 Birch Lake, Alaska 13,000 Year Sediment Core Data Abbott, M.B. Birch Lake, Alaska 13,000 Year Sediment Core Data 2000-03-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/5468 Investigator M.B. Abbott earth science paleoclimate paleolimnology density,wet 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 500 degrees C earth science paleoclimate paleolimnology carbonate,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,LOI at 850 degrees C earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology density,dry sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology magnetic susceptibility earth science paleoclimate paleolimnology age control earth science paleoclimate paleolimnology physical properties earth science paleoclimate paleolimnology geochemistry earth science paleoclimate paleolimnology lake level geoscientificInformation 10000 cal yr BP 0 cal yr BP Complete 64.3 64.3 -146.66667 -146.66667 Continent North America United States Of America Alaska Birch Lake, core D>LATITUDE 64.3>LONGITUDE -146.66667 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

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Abbott, M.B.. 2000. Lake-level Reconstructions and Paleohydrology of Birch Lake, Central Alaska Based on Seismic Reflection Profiles and Core Transects. Quaternary Research Vol. 53, No. 2, pp.154-166, March 2000

Lake-level history for Birch Lake, Alaska, was reconstructed using seismic profiles and multiproxy sedimentary analyses including sedimentology, geochemistry, magnetic susceptibility, and palynology. Twenty-two seismic profiles (18 km total) and eight sediment cores taken from the lake margin to its depocenter at 13.5 m provide evidence for low lake stands during the late Pleistocene and Holocene. Thirty-one AMS radiocarbon dates of macrofossils and pollen provide a century-scale chronology. Prior to 12,700 14C yr B.P., the lake, which now overflows, was either seasonally dry or desiccated for prolonged periods, indicating a severe period of aridity. Lake level rose more than 18 m between 12,700 and 12,200 14C yr B.P. before falling to 17 m below the level of overflow. Between 11,600 and 10,600 14C yr B.P. the water remained between 14 and 17 m below the overflow level. Onlap sedimentary sequences were formed during a transgression phase between 10,600 and 10,000 14C yr B.P. Between 10,000 and about 8800 14C yr B.P. the lake was between 6 and 9 m below the overflow level. Lake level again rose, approaching the overflow level, between 8800 and 8000 14C yr B.P. Seismic and core evidence of minor erosional events suggest lowstands of 2-6 m until 4800 14C yr B.P. There have been no prolonged periods of lake-level depression since that time. The major restructuring of the climate system during deglaciation evidently generated a complex set of fluctuations in effective moisture in interior Alaska, which likely affected eolian processes and vegetation development, as well as lake levels. STUDY NOTES: Birch Lake, Alaska, Sediment Core Data, used by Abbott et al, 2000, for paleohydrology and lake level reconstructions.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/birchlake_core_gh.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/birchlake_core_f.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/birchlake_core_k.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/birchlake_core_i.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/birchlake_c14.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/birchlake_core_d.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/birchlake.xls GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/alaska/birchlake/readme_abbott2000.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11