noaa-icecore-10291
NGRIP Ice Core 41-34 KYrBP dD(CH4) Data
Bock, M.; Schmitt, J.; Möller, L.; Spahni, R.; Blunier, T.; Fischer, H.
NGRIP Ice Core 41-34 KYrBP dD(CH4) Data
2011-02-02
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/10291
Investigator
M.
Bock
Investigator
J.
Schmitt
Investigator
L.
Möller
Investigator
R.
Spahni
Investigator
T.
Blunier
Investigator
H.
Fischer
earth science
paleoclimate
ice cores
sample identification,null,null,null,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
delta 2H,methane,null,per mil VSMOW,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
depth,null,null,meter,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
delta 2H,methane,null,per mil VSMOW,null,ice cores,corrected,null,N,null
earth science
paleoclimate
ice cores
gas age,null,null,calendar year before present,null,ice cores,null,null,N,null
earth science
paleoclimate
climate forcing|ice cores
methane,bulk atmosphere,null,parts per billion,null,climate forcing|ice cores,null,null,N,null
earth science
paleoclimate
ice core
hydrogen isotopes
earth science
paleoclimate
ice core
atmospheric gas
geoscientificInformation
Dansgaard-Oeschger cycles
biogeochemical cycles
40987 cal yr BP
33678 cal yr BP
Complete
75.1
75.1
-42.33
-42.33
2917
2917
Continent
North America
Greenland
NGRIP>LATITUDE 75.1>LONGITUDE -42.33
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
Bock, M., J. Schmitt, L. Möller, R. Spahni, T. Blunier,
and H. Fischer. 2010.
Hydrogen Isotopes Preclude Marine Hydrate CH4 Emissions
at the Onset of Dansgaard-Oeschger Events.
Science, Vol. 328, pp. 1686.
DOI: 10.1126/science.1187651
The causes of past changes in the global methane cycle
and especially the role of marine methane hydrate (clathrate)
destabilization events are a matter of debate. Here we present
evidence from the North Greenland Ice Core Project ice core
based on the hydrogen isotopic composition of methane [dD(CH4)]
that clathrates did not cause atmospheric methane concentration
to rise at the onset of Dansgaard-Oeschger (DO) events 7 and 8.
Box modeling supports boreal wetland emissions as the most likely
explanation for the interstadial increase. Moreover, our data
show that dD(CH4) dropped 500 years before the onset of DO 8,
with CH4 concentration rising only slightly. This can be
explained by an early climate response of boreal wetlands,
which carry the strongly depleted isotopic signature of
high-latitude precipitation at that time.
STUDY NOTES: Deuterium isotope data of methane (dDCH4) from the NGRIP
ice core, for 41-34 KYrBP.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/isotopes/ngrip2010ddch4.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/isotopes/ngrip2010ddch4.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11