noaa-icecore-13566
Polar Ice Cores Annual 10Be Data for the Neutron Monitor Era
Pedro, J.B.; McConnell, J.R.; van Ommen, T.D.; Fink, D.; Curran, M.A.J.; Smith, A.M.; Simon, K.J.; Moy, A.D.; Das, S.B.
Polar Ice Cores Annual 10Be Data for the Neutron Monitor Era
2012-11-07
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13566
Investigator
J.B.
Pedro
Investigator
J.R.
McConnell
Investigator
T.D.
van Ommen
Investigator
D.
Fink
Investigator
M.A.J.
Curran
Investigator
A.M.
Smith
Investigator
K.J.
Simon
Investigator
A.D.
Moy
Investigator
S.B.
Das
earth science
paleoclimate
ice cores
ice age,null,null,year Common Era,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
10Be,bulk ice,null,standard deviation unit,null,ice cores,normalized,accelerator mass spectrometry,N,null
earth science
paleoclimate
ice cores
delta 18O,bulk ice,null,per mil VSMOW,null,ice cores,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
ice cores
10Be,bulk ice,null,null,null,ice cores,null,accelerator mass spectrometry,N,atom per milligram
earth science
paleoclimate
ice cores
10Be,bulk ice,one standard error,null,null,ice cores,null,accelerator mass spectrometry,N,atom per milligram
earth science
paleoclimate
ice cores
accumulation rate,bulk ice,null,meter per year,null,ice cores,null,null,N,m ice equivalent/year
earth science
paleoclimate
ice cores
10Be,bulk ice,one standard error,count per square meter per second,null,ice cores,null,accelerator mass spectrometry,N,atom per square meter per second
earth science
paleoclimate
ice core
radiogenic isotopes
geoscientificInformation
1936 AD
2009 AD
14 cal yr BP
-59 cal yr BP
Complete
-66.73
67.5273
-36.0615
112.83
1390
2936
Continent
North America
Greenland
Das2>LATITUDE 67.5273>LONGITUDE -36.0615
Continent
Antarctica
Law Dome>LATITUDE -66.73>LONGITUDE 112.83
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
J.B. Pedro, J.R. McConnell, T.D.van Ommen, D.Fink, M.A.J. Curran, A.M. Smith, K.J. Simon, A.D.Moy, S.B.Das. 2012.
Solar and climate influences on icecore 10Be records from Antarctica and Greenland during the neutron monitor era.
Earth and Planetary Science Letters, Vol. 355-356, pp. 174-186.
DOI: 10.1016/j.epsl.2012.08.038
Cosmogenic 10Be in polar ice cores is a primary proxy for past solar activity. However, interpretation of the 10Be record is hindered by limited understanding of the physical processes governing its atmospheric transport and deposition to the ice sheets. This issue is addressed by evaluating two accurately dated, annually resolved ice core 10Be records against modern solar activity observations and instrumental and reanalysis climate data. The cores are sampled from the DSS site on Law Dome, East Antarctica (spanning 1936-2009) and the Das2 site, southeast Greenland (1936-2002), permitting inter-hemispheric comparisons. Concentrations at both DSS and Das2 are significantly correlated to the 11-yr solar cycle modulation of cosmic ray intensity, rxy = 0.54 with 95% CI [0.31; 0.70], and rxy = 0.45 with 95% CI [0.22; 0.62], respectively. For both sites, if fluxes are used instead of concentrations then correlations with solar activity decrease. The strength and spectral coherence of the solar activity signal in 10Be is enhanced when ice core records are combined from both Antarctica and Greenland. The amplitudes of the 11-yr solar cycles in the 10Be data appear inconsistent with the view that the ice sheets receive only 10Be produced at polar latitudes. Significant climate signals detected in the 10Be series include the zonal wave three pattern of atmospheric circulation at DSS, rxy = -0.36 with 95% CI [-0.57; -0.10], and the North Atlantic Oscillation at Das2, rxy = -0.42 with 95% CI [-0.64; -0.15]. The sensitivity of 10Be concentrations to modes of atmospheric circulation advises caution in the use of 10Be records from single sites in solar forcing reconstructions.
STUDY NOTES: Annually-resolved 10Be concentrations, stable water isotope ratios and
accumualtion rate data from the DSS site on Law Dome, East Antarctica
(spanning 1936-2009) and the Das2 site, southeast Greenland (1936-2002).
A composite record constructed from these records and previously published
records from NGRIP, Renland and Dye 3 (Greenland) and Dronning Maud Land
(Antarctica) is also provided.
References for DSS data spanning 2000-2010: Pedro et al. Clim. Past 7:707; Pedro et al. JGR 116:D23120
Note: All measurements are calibrated to the NIST SRM 4325 10Be standard reference material, utilising the Nishiizumi et al. (2007) 10Be:9Be ratio of (2.79 +/- 0.02) x 10^(-11)
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/pedro2012bipolar10be.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/pedro2012law10be.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/pedro2012greenland10be.txt
USA/NOAA
DIF
Version 9.8.4
2019-05-06
2019-05-06