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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/cp-2017-68
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-2017-68
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 08 Jun 2017

Research article | 08 Jun 2017

Review status
This discussion paper is a preprint. A revision of the manuscript was accepted for the journal Climate of the Past (CP).

Interhemispheric Effect of Global Geography on Earth's Climate Response to Orbital Forcing

Rajarshi Roychowdhury and Robert DeConto Rajarshi Roychowdhury and Robert DeConto
  • University of Massachusetts – Amherst

Abstract. The climate response of the Earth to orbital forcing shows a distinct hemispheric asymmetry due to the unequal distribution of land in the Northern versus Southern Hemispheres. This asymmetry is examined using a Global Climate Model (GCM) and a Land Asymmetry Effect (LAE) is quantified for each hemisphere. The results show how changes in obliquity and precession translate into variations in the calculated LAE. We find that the global climate response to specific past orbits is likely unique and modified by complex climate–ocean–cryosphere interactions that remain poorly known and difficult to model. Nonetheless, these results provide a baseline for interpreting contemporaneous proxy climate data spanning a broad range of latitudes, which maybe especially useful in paleoclimate data-model comparisons, and individual time-continuous records exhibiting orbital cyclicity.

Rajarshi Roychowdhury and Robert DeConto
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
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Rajarshi Roychowdhury and Robert DeConto
Rajarshi Roychowdhury and Robert DeConto
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