noaa-lake-13218
Lake Braya Sø, Greenland 7,000 Year Temperature Reconstructions
von Gunten, L.; D'Andrea, W.J.; Bradley, R.S.; Huang, Y.
Lake Braya Sø, Greenland 7,000 Year Temperature Reconstructions
2012-08-29
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13218
Investigator
L.
von Gunten
Investigator
W.J.
D'Andrea
Investigator
R.S.
Bradley
Investigator
Y.
Huang
earth science
paleoclimate
climate reconstructions|paleolimnology
lake surface temperature,alkenone unsaturation index,unspecified error upper bound,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,based on Uk37 and VIS-RS
earth science
paleoclimate
climate reconstructions|paleolimnology
lake surface temperature,alkenone unsaturation index,unspecified error lower bound,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,based on Uk37 and VIS-RS
earth science
paleoclimate
climate reconstructions|paleolimnology
age,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleolimnology
lake surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleolimnology,filtered|interpolated,null,N,based on Uk37 and VIS-RS; linearly interpolated to annual time steps; band-pass filtered 50-70 years
earth science
paleoclimate
climate reconstructions|paleolimnology
lake surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,based on Uk37 and VIS-RS
earth science
paleoclimate
paleolimnology
reconstruction
geoscientificInformation
Air Temperature Reconstruction
-4999 AD
2005 AD
6949 cal yr BP
-55 cal yr BP
Complete
69.9875
69.9875
-51.0333
-51.0333
170
170
Continent
North America
Greenland
Lake Braya Sø>LATITUDE 69.9875>LONGITUDE -51.0333
None
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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
von Gunten, L., W.J. D'Andrea, R.S. Bradley, and Y. Huang. 2012.
Proxy-to-proxy calibration: Increasing the temporal resolution
of quantitative climate reconstructions.
Scientific Reports 2, Article number 609, 29 August 2012.
doi:10.1038/srep00609
High-resolution paleoclimate reconstructions are often restricted
by the difficulties of sampling geologic archives in great detail
and the analytical costs of processing large numbers of samples.
Using sediments from Lake Braya Sø, Greenland, we introduce a new
method that provides a quantitative high-resolution paleoclimate
record by combining measurements of the alkenone unsaturation index
(UK37) with non-destructive scanning reflectance spectroscopic
measurements in the visible range (VIS-RS). The proxy-to-proxy (PTP)
method exploits two distinct calibrations: the in situ calibration
of UK37 to lake water temperature and the calibration of scanning
VIS-RS data to down core UK37 data. Using this approach, we produced
a quantitative temperature record that is longer and has 5 times
higher sampling resolution than the original UK37 time series,
thereby allowing detection of temperature variability in frequency
bands characteristic of the AMO over the past 7,000 years.
STUDY NOTES: High-resolution temperature reconstructions based on alkenone data
and scanning reflectance spectroscopy measurements from sediments
collected in Lake Braya Sø, West Greenland. Free lipids were
extracted from core BS01-01, freeze-dried and homogenized.
Alkenone samples at 0.5 cm intervals were quantified by
gas-chromatography-flame-ionization-detection. The VIS-RS
measurements were conducted on an overlapping core (BS03-01)
at 2mm intervals. Relative Absorption Band Depth at 660-760 nm
was utilized for the reconstructions.
Lake Braya Sø, West Greenland: 66°59'15"N, 51°02'0"W, 170m elev, 24m depth
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/braya-so2012.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/braya-so2012.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11