noaa-recon-11919
Reykjanes Ridge 230 Year Diatom August SST Reconstruction
Miettinen, A.; Koç, N.; Hall, I.R.; Godtliebsen, F.; Divine, D.V.
Reykjanes Ridge 230 Year Diatom August SST Reconstruction
2011-08-04
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/11919
Investigator
A.
Miettinen
Investigator
N.
Koç
Investigator
I.R.
Hall
Investigator
F.
Godtliebsen
Investigator
D.V.
Divine
earth science
paleoclimate
climate reconstructions|paleoceanography
depth at sample end,null,null,centimeter,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
depth at sample start,null,null,centimeter,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,diatom assemblage,null,degree Celsius,Aug,climate reconstructions|paleoceanography,null,regression analysis,N,weighted averaging partial least squares transfer function
earth science
paleoclimate
climate reconstructions|paleoceanography
age,null,null,year Common Era,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
reconstructions
sea surface temperature
geoscientificInformation
North Atlantic Oscillation
Sea Surface Temperature Reconstruction
1773 AD
2004 AD
177 cal yr BP
-54 cal yr BP
Complete
57.4525
57.4525
-27.9147
-27.9147
-2630
-2630
Ocean
Atlantic Ocean
North Atlantic Ocean
Rapid-21-12B>LATITUDE 57.4525>LONGITUDE -27.9147
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
Miettinen, A., N. Koç, I.R. Hall, F. Godtliebsen, and D. Divine. 2011.
North Atlantic sea surface temperatures and their relation to
the North Atlantic Oscillation during the last 230 years.
Climate Dynamics, Vol. 36, Numbers 3-4, pp. 533-543,
DOI: 10.1007/s00382-010-0791-5
August Sea Surface Temperatures (aSSTs) based on fossil diatom
assemblages are generated with 2 year average resolution from a
230-year-long sediment core (Rapid 21-12B), from the Reykjanes
Ridge in the subpolar North Atlantic. The results indicate a
warming trend of ~0.5°C of the surface waters at the Reykjanes
Ridge for the last 230 years. Superimposed on this warming trend
there is a multidecadal to decadal aSST variability of up to 1°C.
The interval from the 1770s to the 1830s represents the coldest
period, whereas ~1860–1880 represents the warmest period during
the last 230 years. The last 25 years is characterized by a
warming trend showing strong decadal aSST variability with
several warm years, but also the coldest years since the 1820s.
The time of these cold years in the mid-1970s, -1980s and -1990s
correspond with the documented great salinity anomalies (GSA)
in the North Atlantic suggesting increased fluxes of cold,
low-salinity waters from the Arctic during the last decades.
The aSST record and the August North Atlantic Oscillation (aNAO)
index show similar multidecadal-scale variability indicating
a close coupling between the oceanic and atmospheric patterns.
The aSST record shows a negative correlation with the aNAO
indicating cold aSST during the positive aNAO trend and vice
versa. Results suggest that the wind driven variation in volume
fluxes of the North Atlantic surface waters could be the major
mechanism behind the observed relationship.
STUDY NOTES: A 230-year-long (~1773-2004 AD) August Sea Surface Temperature
(aSST) record, with 2 year average resolution, from marine
sediment core Rapid 21-12B collected in the northern subpolar
North Atlantic. The 54.3 cm long sediment box-core was recovered
from the southern limb of the Gardar Drift on the eastern flank
of Reykjanes Ridge, in the Iceland Basin, during the RRS Charles
Darwin cruise 159 in 2004. The aSST reconstruction is based on
fossil diatom assemblages and the weighted averaging partial
least squares (WA-PLS) transfer function method.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/miettinen2011/miettinen2011.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/miettinen2011/miettinen2011.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11