noaa-other-12881
Baffin Island 1400 Year Ice Margin Radiocarbon Data
Miller, G.H.; Geirsdóttir, A.; Zhong, Y.; Larsen, D.J.; Otto-Bliesner, B.L.; Holland, M.M.; Bailey, D.A.; Refsnider, K.A.; Lehman, S.J.; Southon, J.R.; Anderson, C.; Björnsson, H.; Thordarson, T.
Baffin Island 1400 Year Ice Margin Radiocarbon Data
2012-03-14
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12881
Investigator
G.H.
Miller
Investigator
A.
Geirsdóttir
Investigator
Y.
Zhong
Investigator
D.J.
Larsen
Investigator
B.L.
Otto-Bliesner
Investigator
M.M.
Holland
Investigator
D.A.
Bailey
Investigator
K.A.
Refsnider
Investigator
S.J.
Lehman
Investigator
J.R.
Southon
Investigator
C.
Anderson
Investigator
H.
Björnsson
Investigator
T.
Thordarson
earth science
paleoclimate
others
geoscientificInformation
Arctic
1724 AD
1724 AD
226 cal yr BP
226 cal yr BP
Complete
71.04155
71.04155
-74.66817
-74.66817
852
852
Continent
North America
Canada
Nunavut
M09-B107v>LATITUDE 71.04155>LONGITUDE -74.66817
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
Miller, G.H, Á. Geirsdóttir, Y. Zhong, D.J. Larsen, B.L. Otto-Bliesner,
M.M. Holland, D.A. Bailey, K.A. Refsnider, S.J. Lehman, J.R. Southon,
C. Anderson, H. Björnsson, and T. Thordarson. 2012.
Abrupt onset of the Little Ice Age triggered by volcanism
and sustained by sea-ice/ocean feedbacks.
Geophys. Res. Lett., 39, L02708, doi:10.1029/2011GL050168
Northern Hemisphere summer temperatures over the past 8000 years
have been paced by the slow decrease in summer insolation resulting
from the precession of the equinoxes. However, the causes of
superposed century-scale cold summer anomalies, of which the
Little Ice Age (LIA) is the most extreme, remain debated, largely
because the natural forcings are either weak or, in the case of
volcanism, short lived. Here we present precisely dated records
of ice-cap growth from Arctic Canada and Iceland showing that LIA
summer cold and ice growth began abruptly between 1275 and 1300 AD,
followed by a substantial intensification 1430-1455 AD. Intervals
of sudden ice growth coincide with two of the most volcanically
perturbed half centuries of the past millennium. A transient
climate model simulation shows that explosive volcanism produces
abrupt summer cooling at these times, and that cold summers can be
maintained by sea-ice/ocean feedbacks long after volcanic aerosols
are removed. Our results suggest that the onset of the LIA can be
linked to an unusual 50-year-long episode with four large sulfur-rich
explosive eruptions, each with global sulfate loading >60 Tg.
The persistence of cold summers is best explained by consequent
sea-ice/ocean feedbacks during a hemispheric summer insolation minimum;
large changes in solar irradiance are not required.
STUDY NOTES: Radiocarbon dates on rooted vegetation revealed by receding ice
collected on Baffin Island, Arctic Canada. These data provide
a history of snowline lowering dates, which are highly correlated
with Arctic summer temperatures.
Samples from Baffin Island, Arctic Canada: ~67 - 71ºN, ~74 - 82ºW
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/radiocarbon/baffin2012c14.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/radiocarbon/baffin2012c14.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11