Preprints
https://doi.org/10.5194/cp-2020-59
https://doi.org/10.5194/cp-2020-59

  28 Apr 2020

28 Apr 2020

Review status: this discussion paper is a preprint. It has been under review for the journal Climate of the Past (CP). The manuscript was not accepted for further review after discussion.

Technical note: Pleistocene climate sensitivity to CO2 forcing is path dependent in reconstructions

Roger M. Cooke1 and Willy P. Aspinall2 Roger M. Cooke and Willy P. Aspinall
  • 1Resources for the Future, Washington DC, 200036 USA
  • 2School of Earth Sciences, University of Bristol, Bristol, UK

Abstract. Improved high-resolution paleo records of atmospheric carbon dioxide (CO2) concentrations and reconstructions of Earth’s surface temperature are available. We analyse one authoritative Pleistocene dataset to explore how the climate sensitivity parameter S varies under different system states, using linear regression of mean annual surface temperature changes against CO2 forcing changes. Data are partitioned by path (deglaciation or glaciation). On the whole data set, S = 2.04 K/Wm−2 and CO2 forcing explains 64 % of the variance in temperature. During deglaciation periods, S = 2.34 K/Wm−2, explaining 75 % of the temperature variance; during glaciations, S = 1.59 K/Wm−2 and explains 48 % of the temperature variance. Possible process-related explanations are conjectured.

Roger M. Cooke and Willy P. Aspinall

 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Roger M. Cooke and Willy P. Aspinall

Roger M. Cooke and Willy P. Aspinall

Viewed

Total article views: 580 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
416 125 39 580 113 34 32
  • HTML: 416
  • PDF: 125
  • XML: 39
  • Total: 580
  • Supplement: 113
  • BibTeX: 34
  • EndNote: 32
Views and downloads (calculated since 28 Apr 2020)
Cumulative views and downloads (calculated since 28 Apr 2020)

Viewed (geographical distribution)

Total article views: 516 (including HTML, PDF, and XML) Thereof 516 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 21 Sep 2021
Download
Short summary
The climate sensitivity parameter S varies under different system states, using linear regression of mean annual surface temperature changes against CO2 forcing changes. Pleistocene data are partitioned by path (deglaciation or glaciation). On the whole data set, S = 2.04 K/Wm−2 and CO2 forcing explains 64 % of the temperature variance. During deglaciation periods, S = 2.34 K/Wm−2, explaining 75 % of the temperature variance; during glaciations, S = 1.59 K/Wm−2 and explains 48 % of the variance.