noaa-ocean-12911
Subpolar North Atlantic 4500 Year Alkenone SST Reconstructions
Sicre, M.-A.; Yiou, P.; Eiríksson, J.; Ezat, U.; Guimbaut, E.; Dahhaoui, I.; Knudsen, K.L.; Jansen, E.; Turon, J.-L.
Subpolar North Atlantic 4500 Year Alkenone SST Reconstructions
2012-05-17
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12911
Investigator
M.-A.
Sicre
Investigator
P.
Yiou
Investigator
J.
Eiríksson
Investigator
U.
Ezat
Investigator
E.
Guimbaut
Investigator
I.
Dahhaoui
Investigator
K.L.
Knudsen
Investigator
E.
Jansen
Investigator
J.-L.
Turon
earth science
paleoclimate
paleocean
biomarkers
earth science
paleoclimate
paleocean
reconstruction
geoscientificInformation
Meridional Overturning Circulation (MOC)
Sea Surface Temperature Reconstruction
4499 cal yr BP
-51 cal yr BP
Complete
66.551
66.551
-17.699
-17.699
-470
-470
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., P. Yiou, J. Eiríksson, U. Ezat, E. Guimbaut,
I. Dahhaoui, K. L. Knudsen, E. Jansen, and J.-L. Turon. 2008.
A 4500-year reconstruction of sea surface temperature
variability at decadal time scales off North Iceland.
Quaternary Science Reviews, Vol. 27, pp. 2041-2047.
doi:10.1016/j.quascirev. 2008.08.009.
Marine paleo-records acquired at high temporal resolution provide
critical data for testing numerical climate models and help to
understand processes underlying ocean variability. This study
presents a unique 4500-year reconstruction of sea surface temperature
(SST) obtained from alkenones in the North Atlantic Polar Front area
off North Iceland, at an average temporal resolution of 4-5 years.
Spectral analysis of this signal shows dominant multidecadal
oscillations which occurred with a stronger amplitude between 2500
and 4200 years BP, hand in hand with fluctuations of bottom currents
indicated by paleomagnetic proxies. Contemporaneous large excursions
of the Inter-tropical Convergence Zone (ITCZ) are also recorded by
the distant Cariaco titanium time series, suggesting a link with
low latitude Atlantic climate. We speculate that the oscillations
reflect changes of the Meridional Overturning Circulation (MOC)
induced by increased ENSO activity.
STUDY NOTES: A 4500 year long reconstruction of sea surface temperature (SST)
obtained from alkenone paleothermometry from the MD99-2275 site,
North of Iceland. This record combines data from Sicre et al.,
QSR 2008 and Sicre et al., Paleoceanography 2011. The latter
extend the record to the most recent part of the record that
was missing in the 2008 data set.
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.
MD99-2275: 66°33'N, 17°42'W, 470 m water depth
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sicre2008/sicre2008.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sicre2008/sicre2008.xls
USA/NOAA
DIF
Version 9.8.4
2019-05-30
2019-05-30