Precambrian climate: the effects of land area and Earth's rotation rate

G. S. Jenkins, H. G. Marshall, W. R. Kuhn

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44 Scopus citations


The associated climate changes are examined with a general circulation model (GCM) and compared with the current climate state. We show that rotation rate changes can affect mean air temperatures by strongly affecting the cloud field. For example, an Earth day length of 14 hours causes the global mean cloud fraction to decrease 20%. There are also large changes in the wind field; indeed, at some mid-latitudes the time-averaged surface wind changes from westerlies to easterlies. If the land masses are removed from the model and with present-day rotation, the global mean air temperature is 4 K higher than for the present-day simulation. -from Authors

Original languageEnglish (US)
Pages (from-to)8785-8791
Number of pages7
JournalJournal of Geophysical Research
Issue numberD5
StatePublished - 1993

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Materials Chemistry
  • Polymers and Plastics
  • Physical and Theoretical Chemistry


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