Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.470 IF 3.470
  • IF 5-year value: 4.009 IF 5-year
    4.009
  • CiteScore value: 3.45 CiteScore
    3.45
  • SNIP value: 1.166 SNIP 1.166
  • IPP value: 3.28 IPP 3.28
  • SJR value: 1.929 SJR 1.929
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 64 Scimago H
    index 64
  • h5-index value: 43 h5-index 43
Discussion papers
https://doi.org/10.5194/cp-2020-28
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2020-28
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: review article 06 Mar 2020

Submitted as: review article | 06 Mar 2020

Review status
This preprint is currently under review for the journal CP.

An Overview on Isotopic Divergences – Causes for instability of Tree-Ring Isotopes and Climate Correlations

Martine M. Savard1 and Valérie Daux2 Martine M. Savard and Valérie Daux
  • 1Geological Survey of Canada, Natural Resources Canada, Québec, G1K 9A9, Canada
  • 2Laboratoire des Sciences du Climat et de l’Environnement (LSCE/UVSQ/CNRS/CEA/IPSL), Gif-sur-Yvette, 94800, France

Abstract. Climatic reconstructions based on tree-ring isotopic series convey substantial information about past conditions prevailing in forested regions of the globe. However, in some cases, the relations between isotopic and climatic records appear unstable over time, generating the ‘isotopic divergences’. Former reviews have thoroughly discussed the divergence concept for tree-ring physical properties, but not for isotopes. Here we want to take stock of the isotopic divergence problem, express concerns and stimulate collaborative work for improving paleoclimatic reconstructions.

There are five main causes for divergent parts in isotopic and climatic series. (1) Artefacts due to sampling and data treatment, relevant for dealing with long-series using sub-fossil stems. (2) Stand dynamics, including juvenile effects mostly occurring in the early part of tree-ring series. (3) Rise in atmospheric pCO2, which can directly influence the foliar behaviour. (4) Change of climate, which may modify the isotope-climate causal links. Finally (5), atmospheric pollution, which may alter leaf and root functions. Future paleoclimate research would benefit from interdisciplinary efforts designed to develop further process-based models integrating multi-proxy inputs, so to help identify causes of isotopic divergences and circumvent some of them in inverse applications.

Martine M. Savard and Valérie Daux

Interactive discussion

Status: open (until 01 May 2020)
Status: open (until 01 May 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Martine M. Savard and Valérie Daux

Martine M. Savard and Valérie Daux

Viewed

Total article views: 218 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
169 46 3 218 1 2
  • HTML: 169
  • PDF: 46
  • XML: 3
  • Total: 218
  • BibTeX: 1
  • EndNote: 2
Views and downloads (calculated since 06 Mar 2020)
Cumulative views and downloads (calculated since 06 Mar 2020)

Viewed (geographical distribution)

Total article views: 123 (including HTML, PDF, and XML) Thereof 119 with geography defined and 4 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 29 Mar 2020
Publications Copernicus
Download
Short summary
Climatic reconstructions based on tree-ring isotopic series convey key information on past conditions prevailing in forested regions. However, in cases, the relations between isotopes and climate appear unstable over time, generating ‘isotopic divergences’. Former reviews have thoroughly discussed the divergence concept for tree-ring width, but not for isotopes. Here we present a synopsis of the isotopic divergence problem, and suggest collaborative work for improving climatic reconstructions.
Climatic reconstructions based on tree-ring isotopic series convey key information on past...
Citation