noaa-recon-13674
Torneträsk, Sweden 1100 Year Tree Ring d13C and Sunshine Reconstruction
Loader, N.J.; Young, G.H.F.; Grudd, H.; McCarroll, D.
Torneträsk, Sweden 1100 Year Tree Ring d13C and Sunshine Reconstruction
2013-01-08
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13674
Investigator
N.J.
Loader
Investigator
G.H.F.
Young
Investigator
H.
Grudd
Investigator
D.
McCarroll
earth science
paleoclimate
climate reconstructions|tree ring
surface downwelling shortwave radiation,null,null,hour,Jun-Aug,climate reconstructions|tree ring,null,null,N,hour per day
earth science
paleoclimate
climate reconstructions|tree ring
surface downwelling shortwave radiation,null,null,hour,Jun-Aug,climate reconstructions|tree ring,null,null,N,scaled 1913-2006; hour per day
earth science
paleoclimate
climate reconstructions|tree ring
surface downwelling shortwave radiation,null,two standard deviations,hour,Jun-Aug,climate reconstructions|tree ring,null,null,N,hour per day
earth science
paleoclimate
tree ring
delta 13C,alpha cellulose,null,per mil VPDB,null,tree ring,corrected,isotope ratio mass spectrometry,N,corrected for the decrease in atmospheric δ13C values due to the rise in CO2 caused by fossil fuel combustion since the beginning of the industrialization
earth science
paleoclimate
tree ring
number of samples,null,null,count,null,tree ring,null,null,N,null
earth science
paleoclimate
instrumental
surface downwelling shortwave radiation,null,null,hour,Jun-Aug,instrumental,null,null,N,hours per day
earth science
paleoclimate
tree ring
delta 13C,alpha cellulose,one standard deviation,per mil VPDB,null,tree ring,corrected,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
tree ring
age,null,null,year Common Era,null,tree ring,null,null,N,null
earth science
paleoclimate
reconstructions
solar radiation
geoscientificInformation
Arctic Oscillation (AO)
Other Reconstruction
900 AD
2008 AD
1050 cal yr BP
-58 cal yr BP
Complete
68.1
68.3
19.4
20.2
Continent
Europe
Northern Europe
Scandanavia
Sweden
Torneträsk d13C>LATITUDE 68.2>LONGITUDE 19.8
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
Loader, N.J., G.H.F. Young, H. Grudd, and D. McCarroll. 2013.
Stable carbon isotopes from Torneträsk, northern Sweden provide a millennial length reconstruction of summer sunshine and its relationship to Arctic circulation.
Quaternary Science Reviews, Vol. 62, pp. 97-113.
DOI: 10.1016/j.quascirev.2012.11.014
This paper presents results from the first 1100 years of a long stable carbon isotope chronology currently in development from Scots Pine (Pinus sylvestris L.) trees growing in the Torneträsk region of northern Sweden. The isotope record currently comprises a total of 74 trees with a mean annual replication of >12, thereby enabling it to be compared directly with other tree-ring based palaeoclimate reconstructions from this region. In developing the reconstruction, several key topics in isotope dendroclimatology (chronology construction, replication, CO2 adjustment and age trends) were addressed.
The resulting carbon isotope series is calibrated against instrumental data from the closest meteorological station at Abisko (AD1913-2008) to provide a record of June-August sunshine for northern Fennoscandia. This parameter is closely linked to the direct control of assimilation rate; Photosynthetically Active Radiation (PAR) and the indirect measures; mean July-August temperature and percent cloud cover. The coupled response of summer sunshine and temperature in this region permits a multi-parameter comparison with a local reconstruction of past temperature variability based upon tree growth proxies to explore the stability of this coupling through time.
Several periods are identified where the temperature (X-ray density) and sunshine (stable carbon isotope ratio) records diverge. The most significant and sustained of these occur between c AD1200-1380 and c AD1550-1780, providing evidence for a cool, sunny, two-phase "Little Ice Age". Whilst summer sunshine reconstructed for the 20th century is significantly different from the mean of the last 1100 years (P < 0.01), conditions during the early mediaeval period are similar to those experienced in northern Fennoscandia during the 20th century (P > 0.01), so it is the 17th-18th, and to a lesser extent, the 13th centuries rather than the early mediaeval period that appear anomalous when viewed within the context of the last 1100 years. The observed departures between temperature and sunshine are interpreted as indicating a change in large-scale circulation associated with a southward migration of the Polar Front. Such a change, affecting the Northern Annular Mode (Arctic Oscillation) would result in more stable anticyclonic conditions (cool, bright, summers) over northern Fennoscandia, thus providing a testable mechanism for the development of a multi-phase, time-transgressive "Little Ice Age" across Europe.
STUDY NOTES: Reconstruction of summer (June-August) sunshine for northern Fennoscandia for the last 1,100 years
based on carbon isotopes from Scot Pine tree rings from Torneträsk, Sweden.
IITRDB007
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/europe/sweden/tornetrask2013d13c.txt
USA/NOAA
DIF
Version 9.8.4
2019-03-01
2019-03-01