noaa-recon-9812
North Atlantic Oscillation Index Coral Sr/Ca 218 Year Reconstruction
Goodkin, N.F.; Hughen, K.A.; Doney, S.C.; Curry, W.B.
North Atlantic Oscillation Index Coral Sr/Ca 218 Year Reconstruction
2010-11-15
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/9812
Investigator
N.F.
Goodkin
Investigator
K.A.
Hughen
Investigator
S.C.
Doney
Investigator
W.B.
Curry
earth science
paleoclimate
climate reconstructions|corals and sclerosponges
North Atlantic Oscillation Index,strontium/calcium,null,standard deviation unit,null,climate reconstructions|corals and sclerosponges,filtered,null,N,3-5yrIndex
earth science
paleoclimate
climate reconstructions|corals and sclerosponges
North Atlantic Oscillation Index,strontium/calcium,null,standard deviation unit,null,climate reconstructions|corals and sclerosponges,filtered,null,N,combined
earth science
paleoclimate
climate reconstructions|corals and sclerosponges
age,null,null,year Common Era,null,climate reconstructions|corals and sclerosponges,null,null,N,null
earth science
paleoclimate
climate reconstructions|corals and sclerosponges
North Atlantic Oscillation Index,strontium/calcium,null,standard deviation unit,null,climate reconstructions|corals and sclerosponges,filtered,null,N,20-100yr Index
earth science
paleoclimate
reconstructions
atmospheric circulation
geoscientificInformation
Atmospheric and Oceanic Circulation Patterns Reconstruction
North Atlantic Oscillation
1781 AD
1988 AD
169 cal yr BP
-38 cal yr BP
Complete
32
32
-64
-64
-16
-16
Ocean
Atlantic Ocean
North Atlantic Ocean
Bermuda
Bermuda>LATITUDE 32>LONGITUDE -64
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
Goodkin, N.F., K.A. Hughen, S.C. Doney, and W.B. Curry. 2008.
Increased multidecadal variability of the North Atlantic
Oscillation since 1781.
Nature Geoscience, Vol. 1, pp. 844-847, December 2008.
Published online: 9 November 2008, doi:10.1038/ngeo352
The North Atlantic Oscillation is a meridional oscillation
of atmospheric mass measured between Iceland and the Azores,
which drives winter climate variability in eastern
North America and Europe. A prolonged period of the positive
phase during the 1990s led to the suggestion that anthropogenic
warming was affecting the behaviour of the North Atlantic
Oscillation. However, instrumental records are too short
to compare observations during periods of extended warm
and cold hemispheric temperatures, and existing palaeoclimate
reconstructions primarily capture terrestrial variability.
Here we present a record of Sr/Ca, a sea surface temperature
proxy, from a Bermuda coral from 1781 to 1999. We use this
monthly resolved record to reconstruct past variability of the
North Atlantic Oscillation at multiple frequencies. Our record
shows enhanced multidecadal scale variability during the late
twentieth century compared with the end of the Little Ice Age
(1800-1850). We suggest that variability within the North
Atlantic Oscillation is linked to the mean temperature of the
Northern Hemisphere, which must be considered in any long-term
predictions.
STUDY NOTES: North Atlantic Oscillation Index (NAO) reconstruction based on
winter coral strontium-to-calcium ratio, a proxy for winter SST.
The SST-based, multifrequency reconstruction of the NAO extends
back to the end of the Little Ice Age (LIA). It is the first
non-terrestrial reconstruction showing long-term multidecadal
behaviour of the NAO.
Coral Sr/Ca was used to reconstruct the NAO by filtering the Sr/Ca
record to isolate the two frequency bands where the coral data are
coherent with the NAO. To evaluate this approach, the same process
was applied to instrumental SST and NAO data. The 3-5 year coherence
is 0.40 (95% significant, n effective = 124) and the 20-100 year
coherence is -0.47 (95% significant, n effective = 24), both with
the expected phase relationship. These results agree well with
those found for the Sr/Ca and instrumental NAO.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/coral/atlantic/goodkin2010nao.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/coral/atlantic/goodkin2010nao.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11