noaa-icecore-11918
Law Dome Ice Core 500 Year Lead Isotope and Barium Data
Vallelonga, P.; Van de Velde, K.; Candelone, J.-P.; Morgan, V.I.; Boutron, C.F.; Rosman, K.J.R.
Law Dome Ice Core 500 Year Lead Isotope and Barium Data
2011-08-03
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/11918
Investigator
P.
Vallelonga
Investigator
K.
Van de Velde
Investigator
J.-P.
Candelone
Investigator
V.I.
Morgan
Investigator
C.F.
Boutron
Investigator
K.J.R.
Rosman
earth science
paleoclimate
ice cores
ice age,null,null,year Common Era,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
206Pb/207Pb,bulk ice,unspecified margin of error,dimensionless,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
206Pb/204Pb,bulk ice,unspecified margin of error,dimensionless,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
lead,bulk ice,null,parts per trillion,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
barium,bulk ice,null,parts per trillion,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
sample identification,null,null,null,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
208Pb/207Pb,bulk ice,null,dimensionless,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
206Pb/204Pb,bulk ice,null,dimensionless,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
lead/barium,bulk ice,null,dimensionless,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
208Pb/207Pb,bulk ice,unspecified margin of error,dimensionless,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
206Pb/207Pb,bulk ice,null,dimensionless,null,ice cores,null,null,N,null
earth science
paleoclimate
ice core
chemistry
geoscientificInformation
1500 AD
1989 AD
450 cal yr BP
-39 cal yr BP
Complete
-66.73
-66.73
112.83
112.83
1390
1390
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
Vallelonga, P., K. Van de Velde, J.-P. Candelone, V.I. Morgan,
C.F. Boutron, and K.J.R. Rosman. 2002.
The lead pollution history of Law Dome, Antarctica,
from isotopic measurements on ice cores: 1500 AD to 1989 AD.
Earth and Planetary Science Letters, Vol. 204, Issues 1-2,
pp. 291-306, 30 November 2002. doi:10.1016/S0012-821X(02)00983-4
Lead isotopic compositions and Pb and Ba concentrations have been
measured in ice cores from Law Dome, East Antarctica, covering the
past 6500 years. 'Natural' background concentrations of Pb (~0.4 pg/g)
and Ba (~1.3 pg/g) are observed until 1884 AD, after which increased
Pb concentrations and lowered 206Pb/207Pb ratios indicate the influence
of anthropogenic Pb. The isotopic composition of 'natural' Pb varies
within the range 206Pb/207Pb=1.20 - 1.25 and 208Pb/207Pb=2.46 - 2.50,
with an average rock and soil dust Pb contribution of 8-12%. A major
pollution event is observed at Law Dome between 1884 and 1908 AD,
elevating the Pb concentration four-fold and changing 206Pb/207Pb
ratios in the ice to ~1.12. Based on Pb isotopic systematics and Pb
emission statistics, this is attributed to Pb mined at Broken Hill
and smelted at Broken Hill and Port Pirie, Australia. Anthropogenic
Pb inputs are at their greatest from ~1900 to ~1910 and from ~1960
to ~1980. During the 20th century, Ba concentrations are consistently
higher than 'natural' levels and are attributed to increased dust
production, suggesting the influence of climate change and/or changes
in land coverage with vegetation.
STUDY NOTES: Law Dome Antarctica ice core Pb and Ba concentrations,
and Pb isotope ratios, for the period 1500-1989 CE.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002pb-ba.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002pb-ba.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11