Journal cover Journal topic
Earth System Dynamics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 4.351 IF 4.351
  • IF 5-year value: 5.124 IF 5-year
    5.124
  • CiteScore value: 4.44 CiteScore
    4.44
  • SNIP value: 1.250 SNIP 1.250
  • IPP value: 4.10 IPP 4.10
  • SJR value: 2.203 SJR 2.203
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 29 Scimago H
    index 29
  • h5-index value: 31 h5-index 31
Discussion papers
https://doi.org/10.5194/esd-2019-41
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esd-2019-41
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 08 Aug 2019

Submitted as: research article | 08 Aug 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Earth System Dynamics (ESD).

Estimates of climatic influence on the carbon cycle

Ian Enting1 and Nathan Clisby2 Ian Enting and Nathan Clisby
  • 1CSIRO Climate Science Centre, Oceans and Atmosphere, Aspendale, Vic, Australia
  • 2Department of Mathematics, Swinburne University of Technology, P.O. Box 218, Hawthorn Vic, 3122, Australia

Abstract. The influence of climatic change on the carbon cycle is important as part of a CO2-climate feedback loop. However the magnitude of the coupling depends on the timescales involved. We expand on previous analyses of the ice-core CO2 data from the pre-industrial period 1000–1750, extending the analysis into the 20th century. Our results emphasise the limitations of characterising the climate-to-CO2 influence by a single number γ. Even once a time-scale dependence is incorporated, the coldest part of the Little Ice Age seems to reflect different behaviour to that in earlier or later centuries. Different temperature reconstructions appear to capture distinct aspects of pre-industrial climate fluctuations that lacked global coherence. An exploratory study extends the analysis into the industrial period. In this study, most paleo-temperature data fail to fit the plateau (or plateaus) in 20th century ice-core CO2, with one particular reconstruction as an exception. One interpretation of this fit is that although the reconstruction does not closely reflect hemispheric temperature changes, it samples a pattern of variation where the terrestrial carbon exchange is anomalously sensitive to regional climate variations. These various results suggest that this type of empirical study may have limited applicability to the 21st century.

Ian Enting and Nathan Clisby
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Ian Enting and Nathan Clisby
Data sets

enting_esd.zip: R code and data sets required to produce the results and plots in "Estimates of Climatic Influence on the Carbon Cycle" I. Enting https://doi.org/10.6084/m9.figshare.9248534

Model code and software

enting_esd.zip: R code and data sets required to produce the results and plots in "Estimates of Climatic Influence on the Carbon Cycle" I. Enting https://doi.org/10.6084/m9.figshare.9248534

Ian Enting and Nathan Clisby
Viewed  
Total article views: 462 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
350 108 4 462 6 8
  • HTML: 350
  • PDF: 108
  • XML: 4
  • Total: 462
  • BibTeX: 6
  • EndNote: 8
Views and downloads (calculated since 08 Aug 2019)
Cumulative views and downloads (calculated since 08 Aug 2019)
Viewed (geographical distribution)  
Total article views: 338 (including HTML, PDF, and XML) Thereof 335 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 08 Dec 2019
Publications Copernicus
Download
Short summary
The influence of climate on the carbon cycle is estimated by relating CO2 from ice-core data to reconstructions of temperature over the last 1000 years. This relation is important for quantifying the strength of the CO2-climate feedback loop. Extending previous analyses into the 20th century confirmed the influence of heterogeneity in climate variation. This enabled interpretation of features in the ice-core CO2 record in the first half of the 20th century that have previously been to explain.
The influence of climate on the carbon cycle is estimated by relating CO2 from ice-core data to...
Citation