noaa-recon-12359
Subpolar North Atlantic 2000 Year Alkenone SST Reconstruction
Sicre, M.-A.; Hall, I.R.; Mignot, J.; Khodri, M.; Ezat, U.; Truong, M.-X.; Eiríksson, J.; Knudsen, K.L.; Jacob, J.; Turon, J.-L.; Jansen, E.
Subpolar North Atlantic 2000 Year Alkenone SST Reconstruction
2011-12-30
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12359
Investigator
M.-A.
Sicre
Investigator
I.R.
Hall
Investigator
J.
Mignot
Investigator
M.
Khodri
Investigator
U.
Ezat
Investigator
M.-X.
Truong
Investigator
J.
Eiríksson
Investigator
K.L.
Knudsen
Investigator
J.
Jacob
Investigator
J.-L.
Turon
Investigator
E.
Jansen
earth science
paleoclimate
climate reconstructions|paleoceanography
age,null,null,year Common Era,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
reconstructions
sea surface temperature
geoscientificInformation
Sea Surface Temperature Reconstruction
-5 AD
2001 AD
1955 cal yr BP
-51 cal yr BP
Complete
57.4515
66.551
-27.9088
-17.699
-2630
-470
Ocean
Atlantic Ocean
North Atlantic Ocean
RAPiD-21-3K>LATITUDE 57.4515>LONGITUDE -27.9088
Ocean
Atlantic Ocean
North Atlantic Ocean
MD99-2275>LATITUDE 66.551>LONGITUDE -17.699
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
Sicre, M.-A., I.R. Hall, J. Mignot, M. Khodri, U. Ezat,
M.-X. Truong, J. Eiríksson, and K.-L. Knudsen. 2011.
Sea surface temperature variability in the subpolar Atlantic
over the last two millennia.
Paleoceanography, 26, PA4218, doi:10.1029/2011PA002169.
A decadal resolution time series of sea surface temperature (SST)
spanning the last two millennia is reconstructed by combining
a proxy record from a new sediment sequence with previously
published data from core MD99-2275, north of Iceland.
The alkenone based SST reconstruction is validated with historic
observational data and compared to a new similar temporal resolution
reconstruction obtained from sediment core RAPiD21-3K, in the subpolar
North Atlantic. The two SST paleorecords show consistent multidecadal
scale coolings throughout the interval and similar expressions during
the contrasted climatic periods 'colloquially known' as the Medieval
Climatic Anomaly (MCA) and Little Ice Age (LIA). In order to further
understand the temporal and spatial SST variations and investigate
the influence of natural forcings on the observed SST changes
during the last millennium, we compare our time series to simulations
using the Institut Pierre-Simon Laplace IPSLCM4-v2 climate model.
This comparison highlights the potential importance of volcanism
as a natural forcing driving coherent abrupt cooling events
captured in the subpolar North Atlantic records.
STUDY NOTES: Decadal resolution time series of sea surface temperature (SST) obtained
from alkenone paleothermometry spanning the last two millennia from core
MD99-2275 located north of Iceland, in the North Altantic polar front.
The current MD99-2275 age model is constructed using eight geochemically
identified tephra layers [Knudsen et al., 2009, Table 2],
the 137Cs peak of maximum nuclear testing in 1963 A.D. and the top
of undisturbed sediment according to 210Pb measurements.
The top of the spliced cores at site MD99–2275 is assumed at
2006 ± 1 A.D, and estimation of age model uncertainties for the
record has been published [Eiríksson et al., 2011].
Temporal resolution ranges from 2 to 4 years.
This reconstruction extends to the present-day the decadal-scale
alkenone based SST reconstruction earlier published by Sicre et al.
[Earth Planet. Sci. Lett., 268, 137–142, doi:10.1016/j.epsl.2008.01.011,
2008a] and Sicre et al. [Quat. Sci. Rev., 27, 2041–2047,
doi:10.1016/j.quascirev. 2008.08.009, 2008b]
and now includes the 20th century.
Overall, this spliced record combines three sediment sequence
reconstructions with different coring devices (piston, gravity and box)
in a highly variable region thus represents a unique regional
reconstruction benchmark.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sicre2011/sicre2011.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sicre2011/sicre2011.xls
USA/NOAA
DIF
Version 9.8.4
2019-05-30
2019-05-30