On bimodality in warm season soil moisture observations

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It has recently been suggested that the bimodality in warm season soil moisture observations in Illinois is evidence of a soil moisture-precipitation feedback. Other studies however provide little evidence for a strong feedback in this region. Here we show that seasonality in the meteorological conditions in combination with the non-linearity of the soil moisture response alone can induce this bimodality. The existence of preferred wet and dry soil moisture states may have implications for the understanding and modeling of soil moisture dynamics in mid-latitude regions
Original languageEnglish
Pages (from-to)L13402
Number of pages4
JournalGeophysical Research Letters
Publication statusPublished - 2005


  • land-atmosphere interactions
  • leaf-area index
  • united-states
  • precipitation
  • dynamics
  • drought
  • climate
  • transpiration
  • feedbacks
  • rainfall

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