noaa-lake-13075
Qalluuraq Lake, Alaska 12,000 Year Multiproxy Methane Sediment Data
Wooller, M.J.; Pohlman, J.; Gaglioti, B.V.; Langdon, P.G.; Jones, M.C.; Walter Anthony, K.M.; Becker, K.W.; Hinrichs, K.-U.; Elvert, M.
Qalluuraq Lake, Alaska 12,000 Year Multiproxy Methane Sediment Data
2012-06-30
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13075
Investigator
M.J.
Wooller
Investigator
J.
Pohlman
Investigator
B.V.
Gaglioti
Investigator
P.G.
Langdon
Investigator
M.C.
Jones
Investigator
K.M.
Walter Anthony
Investigator
K.W.
Becker
Investigator
K.-U.
Hinrichs
Investigator
M.
Elvert
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
depth,null,null,centimeter,null,climate reconstructions|insect|paleolimnology,null,null,N,null
earth science
paleoclimate
insect|paleolimnology
delta 13C,midge,null,per mil VPDB,null,insect|paleolimnology,null,null,N,not trophically adjusted
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
surface air temperature,midge assemblage,null,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,null,regression analysis,N,partial least squares regression
earth science
paleoclimate
paleolimnology
nitrogen,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
delta 15N,sediment,null,per mil,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 13C,sediment,null,per mil VPDB,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 13C,organic matter,null,per mil VPDB,null,paleolimnology,null,null,N,cholesterol biomarker
earth science
paleoclimate
insect|paleolimnology
delta 18O,midge,null,per mil VSMOW,null,insect|paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 13C,ephippia,null,per mil VPDB,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 13C,C27 n-alkane,null,per mil VPDB,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,total organic carbon/total nitrogen
earth science
paleoclimate
paleolimnology
organic carbon,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
reconstruction
earth science
paleoclimate
paleolimnology
oxygen isotopes
earth science
paleoclimate
paleolimnology
carbon isotopes
earth science
paleoclimate
paleolimnology
population abundance
earth science
paleoclimate
paleolimnology
physical properties
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
Arctic
PAGES Arctic 2k
12569 cal yr BP
0 cal yr BP
Complete
70.379
70.379
-157.348
-157.348
13
13
Continent
North America
United States Of America
Alaska
Qalluuraq Lake>LATITUDE 70.379>LONGITUDE -157.348
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
Wooller, M.J., J.W. Pohlman, B.V. Gaglioti, P. Langdon, M. Jones,
K.M. Walter Anthony, K.W. Becker, K.-U. Hinrichs, and M. Elvert. 2012.
Reconstruction of past methane availability in an Arctic Alaska wetland
indicates climate influenced methane release during the past ~12,000 years.
Journal of Paleolimnology, Vol. 48, No. 1, June 2012, pp. 27-42.
DOI: 10.1007/s10933-012-9591-8
Atmospheric contributions of methane from Arctic wetlands during
the Holocene are dynamic and linked to climate oscillations. However,
long-term records linking climate variability to methane availability
in Arctic wetlands are lacking. We present a multi-proxy ~12,000 year
paleoecological reconstruction of intermittent methane availability
from a radiocarbon-dated sediment core (LQ-West) taken from a shallow
tundra lake (Qalluuraq Lake) in Arctic Alaska. Specifically, stable
carbon isotopic values of photosynthetic biomarkers and methane are
utilized to estimate the proportional contribution of methane-derived
carbon to lake-sediment-preserved benthic (chironomids) and pelagic
(cladocerans) components over the last ~12,000 years. These results
were compared to temperature, hydrologic, and habitat reconstructions
from the same site using chironomid assemblage data, oxygen isotopes
of chironomid head capsules, and radiocarbon ages of plant macrofossils.
Cladoceran ephippia from ~4,000 cal year BP sediments have d13C values
that range from ~-39 to -31‰, suggesting peak methane carbon assimilation
at that time. These low d13C values coincide with an apparent decrease
in effective moisture and development of a wetland that included
Sphagnum subsecundum. Incorporation of methane-derived carbon by
chironomids and cladocerans decreased from ~2,500 to 1,500 cal year BP,
coinciding with a temperature decrease. Live-collected chironomids
with a radiocarbon age of 1,640 cal year BP, and fossil chironomids
from 1,500 cal year BP in the core illustrate that ‘old’ carbon
has also contributed to the development of the aquatic ecosystem
since ~1,500 cal year BP. The relatively low d13C values of aquatic
invertebrates (as low as -40.5‰) provide evidence of methane
incorporation by lake invertebrates, and suggest intermittent
climate-linked methane release from the lake throughout the Holocene.
STUDY NOTES: Multiproxy sediment data from Qalluuraq Lake, Alaska,
for the past 12,000 years. Paleoenvironmental proxies measured
include stable isotopic ratios, organic carbon, magnetics,
and plant macrofossils.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/qalluuraq2012.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/qalluuraq2012.txt
USA/NOAA
DIF
Version 9.8.4
2019-05-08
2019-05-08