Advanced

The influence of climate on C-13/C-12 and O-18/O-16 ratios in tree ring cellulose of Pinus sylvestris L. growing in the central Scandinavian Mountains

Seftigen, K; Linderholm, HW; Loader, NJ; Liu, Y and Young, GHF (2011) In Chemical Geology 286(04-mar). p.84-93
Abstract
The stable isotope composition of tree rings is known to contain valuable information of past climatic and environmental changes, which may be used as a complement to tree ring width and maximum latewood density in climate reconstructions. In this study we examine the character and strength of the climate signal captured in the delta O-18 and delta C-13 values of Scots pine (Pinus sylvestris L.) trees growing at the tree-line in the central Scandinavian Mountains. Between 4 and 14 trees were pooled to produce annual records of carbon and oxygen isotope ratios from tree ring cellulose, spanning the period AD 1736-2006. Weather conditions of the current growing season most strongly influenced the carbon and oxygen isotope ratios in a given... (More)
The stable isotope composition of tree rings is known to contain valuable information of past climatic and environmental changes, which may be used as a complement to tree ring width and maximum latewood density in climate reconstructions. In this study we examine the character and strength of the climate signal captured in the delta O-18 and delta C-13 values of Scots pine (Pinus sylvestris L.) trees growing at the tree-line in the central Scandinavian Mountains. Between 4 and 14 trees were pooled to produce annual records of carbon and oxygen isotope ratios from tree ring cellulose, spanning the period AD 1736-2006. Weather conditions of the current growing season most strongly influenced the carbon and oxygen isotope ratios in a given tree ring. Both records showed positive correlations with temperature, sunshine and air pressure, and negative associations with precipitation. The overall climate signal in delta C-13 appeared to be slightly stronger than that of delta O-18. Spatial correlation analysis with gridded instrumental data demonstrated that the carbon series captured the summer temperature signal in a broad region of mid-west Sweden and the eastern part of Norway, greatly exceeding the spatial coverage of the signal derived from pine ring widths growing in the central Scandinavian mountains. A weak relationship between delta C-13 and precipitation and a much stronger temperature and sunshine dependence may imply that photosynthetic rate rather than stomatal conductance is more important in controlling the inter-annual tree ring delta C-13 variability in the area. Moreover, it was shown that, the climate-delta O-18 and delta C-13 relationship was temporally unstable throughout the twentieth century, which was linked to large-scale shifts in climate that may have altered the isotope-climate dependence. Our results thus demonstrate that, stable isotopes in tree rings from maritime high-altitude Scandinavia can provide high-resolution regional climate information, especially regarding parameters associated with temperature. The non-stationary nature of the isotope-precipitation relationship may provide important information on past changes in the large-scale atmospheric circulation during summer. However, these issues needs to be further investigated before pine tree ring isotopes from this region can be confidently used in palaeoclimate reconstructions. (C) 2011 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Tree rings, Stable isotopes, Cellulose, Pinus sylvestris L., Climate, Central Scandinavian Mountains
in
Chemical Geology
volume
286
issue
04-mar
pages
84 - 93
publisher
Elsevier
external identifiers
  • scopus:79959784352
ISSN
0009-2541
DOI
10.1016/j.chemgeo.2011.04.006
project
BECC
language
English
LU publication?
no
id
34de38d8-cf66-46d6-bf87-8f45dc956911 (old id 4448599)
date added to LUP
2014-05-23 12:11:20
date last changed
2017-07-09 03:20:12
@article{34de38d8-cf66-46d6-bf87-8f45dc956911,
  abstract     = {The stable isotope composition of tree rings is known to contain valuable information of past climatic and environmental changes, which may be used as a complement to tree ring width and maximum latewood density in climate reconstructions. In this study we examine the character and strength of the climate signal captured in the delta O-18 and delta C-13 values of Scots pine (Pinus sylvestris L.) trees growing at the tree-line in the central Scandinavian Mountains. Between 4 and 14 trees were pooled to produce annual records of carbon and oxygen isotope ratios from tree ring cellulose, spanning the period AD 1736-2006. Weather conditions of the current growing season most strongly influenced the carbon and oxygen isotope ratios in a given tree ring. Both records showed positive correlations with temperature, sunshine and air pressure, and negative associations with precipitation. The overall climate signal in delta C-13 appeared to be slightly stronger than that of delta O-18. Spatial correlation analysis with gridded instrumental data demonstrated that the carbon series captured the summer temperature signal in a broad region of mid-west Sweden and the eastern part of Norway, greatly exceeding the spatial coverage of the signal derived from pine ring widths growing in the central Scandinavian mountains. A weak relationship between delta C-13 and precipitation and a much stronger temperature and sunshine dependence may imply that photosynthetic rate rather than stomatal conductance is more important in controlling the inter-annual tree ring delta C-13 variability in the area. Moreover, it was shown that, the climate-delta O-18 and delta C-13 relationship was temporally unstable throughout the twentieth century, which was linked to large-scale shifts in climate that may have altered the isotope-climate dependence. Our results thus demonstrate that, stable isotopes in tree rings from maritime high-altitude Scandinavia can provide high-resolution regional climate information, especially regarding parameters associated with temperature. The non-stationary nature of the isotope-precipitation relationship may provide important information on past changes in the large-scale atmospheric circulation during summer. However, these issues needs to be further investigated before pine tree ring isotopes from this region can be confidently used in palaeoclimate reconstructions. (C) 2011 Elsevier B.V. All rights reserved.},
  author       = {Seftigen, K and Linderholm, HW and Loader, NJ and Liu, Y and Young, GHF},
  issn         = {0009-2541},
  keyword      = {Tree rings,Stable isotopes,Cellulose,Pinus sylvestris L.,Climate,Central Scandinavian Mountains},
  language     = {eng},
  number       = {04-mar},
  pages        = {84--93},
  publisher    = {Elsevier},
  series       = {Chemical Geology},
  title        = {The influence of climate on C-13/C-12 and O-18/O-16 ratios in tree ring cellulose of Pinus sylvestris L. growing in the central Scandinavian Mountains},
  url          = {http://dx.doi.org/10.1016/j.chemgeo.2011.04.006},
  volume       = {286},
  year         = {2011},
}