The Rock Geochemical Model (RokGeM) v0.9

G. Colbourn*, A. Ridgwell, T. M. Lenton

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

29 Citations (Scopus)

Abstract

A new model of terrestrial rock weathering - the Rock Geochemical Model (RokGeM) - was developed for incorporation into the GENIE Earth System modelling framework. In this paper we describe the model. We consider a range of previously devised parameterizations, ranging from simple dependencies on global mean temperature following Berner et al. (1983), to spatially explicit dependencies on run-off and temperature (GKWM, Bluth and Kump, 1994; GEM-CO2, Amiotte-Suchet et al., 2003) - fields provided by the energy-moisture balance atmosphere model component in GENIE. Using long-term carbon cycle perturbation experiments, we test the effects of a wide range of model parameters, including whether or not the atmosphere was "shortcircuited" in the carbon cycle; the sensitivity and feedback strength of temperature and run-off on carbonate and silicate weathering; different river-routing schemes; 0-D (global average) vs. 2-D (spatially explicit) weathering schemes; and the lithology dependence of weathering. Included are details of how to run the model and visualize the results.

Original languageEnglish
Pages (from-to)1543-1573
Number of pages31
JournalGeoscientific Model Development
Volume6
Issue number5
DOIs
Publication statusPublished - 2013

Keywords

  • EARTH SYSTEM MODEL
  • FOSSIL-FUEL CO2
  • ATMOSPHERIC CARBON-DIOXIDE
  • GLOBAL CHEMICAL EROSION
  • PHANEROZOIC TIME
  • CLIMATE-CHANGE
  • LIFE-SPAN
  • BIOTIC ENHANCEMENT
  • REVISED MODEL
  • GEOLOGIC TIME

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