noaa-lake-13078
Keche Lake, Alaska 3500 Year Multiproxy Sediment Data
Chipman, M.L.; Clegg, B.F.; Hu, F.S.
Keche Lake, Alaska 3500 Year Multiproxy Sediment Data
2012-06-30
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13078
Investigator
M.L.
Chipman
Investigator
B.F.
Clegg
Investigator
F.S.
Hu
earth science
paleoclimate
paleolimnology
age at sample end,null,null,calendar year before present,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,magnetic susceptibility measurement with ring or loop sensor,N,x10-6 units
earth science
paleoclimate
paleolimnology
calcite,sediment,null,weight percent,null,paleolimnology,null,x-ray diffraction,N,null
earth science
paleoclimate
paleolimnology
depth at sample start,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
quartz,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null
earth science
paleoclimate
paleolimnology
depth,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 18O,carbonate,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,charophyte encrustation
earth science
paleoclimate
paleolimnology
illite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null
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,weight percent,null,paleolimnology,null,loss on ignition,N,loss on ignition: 550 degrees Celsius for 2 hours
earth science
paleoclimate
paleolimnology
plagioclase feldspar series,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null
earth science
paleoclimate
paleolimnology
depth at sample end,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
sedimentation rate,null,null,centimeter per year,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 13C,carbonate,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
delta 13C,carbonate,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,charophyte encrustation
earth science
paleoclimate
paleolimnology
mineral index,sediment,null,weight percent,null,paleolimnology,null,x-ray diffraction,N,clay minerals
earth science
paleoclimate
paleolimnology
mineral index,sediment,null,weight percent,null,paleolimnology,null,x-ray diffraction,N,quartz plus plagioclase plus potassium feldspar
earth science
paleoclimate
paleolimnology
age at sample start,null,null,calendar year before present,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
calcium carbonate,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,loss on ignition: 950 degrees Celsius for 4 hours
earth science
paleoclimate
paleolimnology
dolomite,sediment,null,weight percent,null,paleolimnology,null,x-ray diffraction,N,null
earth science
paleoclimate
paleolimnology
mineral index,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,illite plus smectite
earth science
paleoclimate
paleolimnology
chlorite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null
earth science
paleoclimate
paleolimnology
mineral matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,loss on ignition: 950 degrees Celsius for 4 hours
earth science
paleoclimate
paleolimnology
delta 18O,carbonate,null,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
kaolinite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null
earth science
paleoclimate
paleolimnology
potassium feldspar,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null
earth science
paleoclimate
paleolimnology
mineral index,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,pyrite plus marcasite
earth science
paleoclimate
paleolimnology
age,null,null,calendar year before present,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 18O,carbonate,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
delta 18O,carbonate,null,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,charophyte encrustation
earth science
paleoclimate
paleolimnology
oxygen isotopes
earth science
paleoclimate
paleolimnology
magnetic susceptibility
earth science
paleoclimate
paleolimnology
carbon isotopes
earth science
paleoclimate
paleolimnology
physical properties
earth science
paleoclimate
paleolimnology
mineralogy
geoscientificInformation
Arctic
PAGES Arctic 2k
3393 cal yr BP
-57 cal yr BP
Complete
68.02
68.02
-146.92
-146.92
740
740
Continent
North America
United States Of America
Alaska
Keche Lake>LATITUDE 68.02>LONGITUDE -146.92
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
Chipman, M.L., B.F. Clegg, and F.S. Hu. 2012.
Variation in the moisture regime of northeastern interior Alaska
and possible linkages to the Aleutian Low: inferences from a
late-Holocene d18O record.
Journal of Paleolimnology, Vol. 48, No. 1, June 2012, pp. 69-81.
DOI: 10.1007/s10933-012-9599-0
Analyses of oxygen and carbon isotopes in bulk carbonate
and Chara-stem encrustations, X-ray diffraction, and sediment
composition from Keche Lake offer new information on climatic
change over the past ~3,400 years in northeastern interior Alaska.
The d18O and dD values of water samples from the lake and its inlet
streams suggest that evaporation plays an important role in
determining the isotopic composition of Keche Lake water at present.
However, evaporative enrichment does not appear to be a major driver
of the pronounced fluctuations in the bulk-carbonate d18O record
on the basis of comparison with Chara-d18O values. The d18O values
of bulk carbonate in the Keche Lake sediments vary by up to 10 ‰
over the past 3,400 years, with maximum values of -12 ‰ around
3,400 cal BP and between 2,100 and 1,500 cal BP. High d18O peaks
are associated with sediments dominated by quartz, feldspar,
and clay minerals suggesting the influence of detrital carbonate.
Multi-millennial patterns of d18O variation at Keche Lake appear
to be linked with changes in watershed and sediment-depositional
processes, which may be driven by varying moisture abundance
associated with the position of the Aleutian Low (AL).
The increasing trend of carbonate d18O from 3,400 to ~2,100 cal BP
probably reflects the increasing importance of a westerly AL,
and the high frequency of d18O spikes ~2,100–1,500 cal BP may have
resulted from the prevalence of a westerly AL position.
Predominance of a westerly AL likely increased snowfall
and winter temperature in the region. Such conditions would have
promoted soil erosion and thermokarst activity during spring
snowmelt, resulting in episodic large influxes of detrital
carbonate to Keche Lake and elevating bulk-carbonate d18O.
Over the past 1,500 years, bulk-carbonate d18O remained
relatively high at Keche Lake but variation was much less
pronounced than before. A broad d18O peak centered ~400 cal BP
may be related to enhanced winter moisture during the Little
Ice Age, although our chronology is inadequate for a rigorous
assessment of this interpretation. This study contributes
a new d18O record and offers additional information on past
moisture-regime shifts associated with changing
atmospheric-circulation patterns.
STUDY NOTES: Isotope, geochemical, and chronological data for Keche Lake,
Alaska, for the past 3500 years. Lake water isotope, temperature,
conductivity, and oxygen measurements from July 2007 also included.
Keche Lake: 68.02°N, 146.92°W; 740 m a.s.l.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/keche2012.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/keche2012.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11