Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
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
Review status
This discussion paper is a preprint. A revision of the manuscript is under review 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 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.

Citation: Roychowdhury, R. and DeConto, R.: Interhemispheric Effect of Global Geography on Earth's Climate Response to Orbital Forcing, Clim. Past Discuss., https://doi.org/10.5194/cp-2017-68, in review, 2017.
Rajarshi Roychowdhury and Robert DeConto
Rajarshi Roychowdhury and Robert DeConto
Rajarshi Roychowdhury and Robert DeConto

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