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Using Blue Intensit...
Using Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to improve reconstruction of past hydroclimate variability
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- Seftigen, Kristina, 1985 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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- Fuentes, Mauricio (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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- Charpentier Ljungqvist, Fredrik, 1982- (author)
- Uppsala universitet,Kollegiet för avancerade studier (SCAS),Stockholms universitet, Historiska institutionen,Historiska institutionen,Swedish Collegium for Advanced Study, Sweden
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Björklund, Jesper (author)
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(creator_code:org_t)
- 2020-05-13
- 2020
- English.
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In: Climate Dynamics. - : Springer Nature. - 0930-7575 .- 1432-0894. ; 55:3-4, s. 579-594
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Abstract
Subject headings
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- High-resolution hydroclimate proxy records are essential for distinguishing natural hydroclimate variability from possible anthropogenically-forced changes, since instrumental precipitation observations are too short to represent the whole spectrum of natural variability. In Northern Europe, progress in this field has been hampered by a relative lack of long and truly moisture-sensitive proxy records. In this study, we provide the first assessment of the dendroclimatic potential of Blue Intensity (BI) and partial ring-width measurements (latewood and earlywood width series) from a network of cold and drought-prone Pinus sylvestris L. sites in Sweden. Our results show that all tree-ring parameters and sites share a clear and strong sensitivity to warm-season precipitation. The Delta BI parameter, in particular, shows considerable potential for hydroclimate reconstructions, here permitting a cross-validated precipitation reconstruction capable of explaining 56% (1901-2010 period) of regional-scale warm-season high-frequency precipitation variance. Using Delta BI as an alternative to ring-width improves the predictive skill with nearly a 20 percentage points increase in explained variance, reduces signal instability over time as well as allows a broader seasonal window (May-July) to be reconstructed. Additionally, we found that earlywood BI also reflect a positive late winter through early summer temperature signal. These findings emphasize that tree-rings, and in particular wood density parameters such as from BI, are capable of providing fundamental information to advance our understanding of hydroclimate variability in regions with a cool and rather humid climate regime that traditionally has been overlooked in studies of past droughts. Increasing the spatio-temporal coverage of hydroclimate records in northern Europe, and taking full advantage of the opportunities offered by the wood densitometric properties should be considered a research priority.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- Dendroclimatology
- Tree-ring
- Blue Intensity
- Scots pine
- Hydroclimate
- Fennoscandia
- Drought sensitivity
- Blue Intensity
- Dendroclimatology
- Drought sensitivity
- Fennoscandia
- Hydroclimate
- Scots pine
- Tree-ring
Publication and Content Type
- ref (subject category)
- art (subject category)
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