noaa-lake-9896
200KYr Midge Temperature, Diatom pH, and C/N Data
Axford, Y.; Briner, J.P.; Cooke, C.A; Francis, D.R.; Michelutti, N.; Miller, G.H.; Smol, J.P.; Thomas, E.K.; Wilson, C.R.; Wolfe, A.P.
200KYr Midge Temperature, Diatom pH, and C/N Data
2010-11-17
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/9896
Investigator
Y.
Axford
Investigator
J.P.
Briner
Investigator
C.A
Cooke
Investigator
D.R.
Francis
Investigator
N.
Michelutti
Investigator
G.H.
Miller
Investigator
J.P.
Smol
Investigator
E.K.
Thomas
Investigator
C.R.
Wilson
Investigator
A.P.
Wolfe
earth science
paleoclimate
paleolimnology
identified diatom,null,null,percent,null,paleolimnology,null,null,N,Eunotia exigua
earth science
paleoclimate
paleolimnology
carbon,sediment,null,weight percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
surface air temperature,midge assemblage,null,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,null,regression analysis,N,calibration data set: Eastern Canada Francis et al. 2006 and Eastern Canada Walker et al. 1997; weighted-averaging regression
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
depth,null,null,centimeter,null,climate reconstructions|insect|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
lake surface temperature,midge assemblage,null,degree Celsius,summer,climate reconstructions|insect|paleolimnology,null,regression analysis,N,calibration data set: Eastern Canada Francis et al. 2006 and Eastern Canada Walker et al. 1997; weighted averaging regression with tolerance downweighting
earth science
paleoclimate
paleolimnology
chlorophyll,null,null,milligram per gram,null,paleolimnology,null,null,N,chlorophyll a
earth science
paleoclimate
paleolimnology
mass,dry sediment,null,gram per square centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,optima < 10 degrees Celsius
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,optima 10-15 deg C
earth science
paleoclimate
paleolimnology
identified diatom,null,null,percent,null,paleolimnology,null,null,N,Aulacoseira sp.
earth science
paleoclimate
climate reconstructions|paleolimnology
pH,diatom assemblage|lake water,null,dimensionless,null,climate reconstructions|paleolimnology,null,regression analysis,N,calibration data set: Baffin Island Joynt and Wolfe 2001; weighted-averaging regression
earth science
paleoclimate
insect|paleolimnology
sample identification,null,null,null,null,insect|paleolimnology,null,null,C,null
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
age,null,null,calendar year before present,null,climate reconstructions|insect|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
age,null,null,year Common Era,null,climate reconstructions|insect|paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,bulk sediment C/N
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,optima >15 deg C
earth science
paleoclimate
paleolimnology
identified diatom,null,null,percent,null,paleolimnology,null,null,N,Fragilaria sp.
earth science
paleoclimate
paleolimnology
reconstruction
earth science
paleoclimate
paleolimnology
population abundance
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
Air Temperature Reconstruction
Arctic
200000 cal yr BP
907 cal yr BP
Complete
70.55
70.55
-68.95
-68.95
195
195
Continent
North America
Canada
Nunavut
Lake CF8>LATITUDE 70.55>LONGITUDE -68.95
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
Axford, Y., J.P. Briner, C.A. Cooke, D.R. Francis, N. Michelutti,
G.H. Miller, J.P. Smol, E.K. Thomas, C.R. Wilson, and A.P. Wolfe. 2009.
Recent changes in a remote Arctic lake are unique within
the past 200,000 years.
Proceedings of the National Academy of Sciences,
Vol. 106, pp. 18443-18446.
The Arctic is currently undergoing dramatic environmental
transformations, but it remains largely unknown how these changes
compare with long-term natural variability. Here we present a lake
sediment sequence from the Canadian Arctic that records warm
periods of the past 200,000 years, including the 20th century.
This record provides a perspective on recent changes in the Arctic
and predates by approximately 80,000 years the oldest
stratigraphically intact ice core recovered from the Greenland
Ice Sheet. The early Holocene and the warmest part of the Last
Interglacial (Marine Isotope Stage or MIS 5e) were the only periods
of the past 200,000 years with summer temperatures comparable to
or exceeding today's at this site. Paleoecological and geochemical
data indicate that the past three interglacial periods were
characterized by similar trajectories in temperature, lake biology,
and lakewater pH, all of which tracked orbitally-driven solar
insolation. In recent decades, however, the study site has deviated
from this recurring natural pattern and has entered an environmental
regime that is unique within the past 200 millennia.
STUDY NOTES: Multiproxy sediment data from Lake CF8, Baffin Island, Nunavut, Canada
for the last 200,000 years. Included are fossil midge data and inferred
water and air temperatures, diatom data and diatom-inferred pH,
Gyttja dry mass, Chlorophyll-a, C/N ratio, and Carbon content data.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2009.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/cf8-2009.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11