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Interplay of climate seasonality and soil moisture-rainfall feedback

Publication ,  Journal Article
Yin, J; Porporato, A; Albertson, J
Published in: Water Resources Research
January 1, 2014

The soil moisture-rainfall feedback (SMRF) may significantly impact hydro-climatic dynamics, inducing persistent weather conditions that are responsible for prolonged droughts or abnormally wet states. However, externally driven seasonal variability in rainfall and potential evapotranspiration, with the associated patterns of wet and dry conditions, may both interact with such an SMRF. In this study, seasonal variations in radiation and precipitation forcing are included in a stochastic SMRF model with the assumption of a soil moisture-dependent average rainfall frequency to explore their effects on the soil moisture probabilistic structure. The theoretical model results, based on a parameterization using data for soil moisture and climate in Illinois, show that average rainfall frequency peaks in late spring when both the soil condition and the SMRF strength favor convective rainfall triggering. Under such conditions, the soil moisture tends to exhibit bimodal behavior until the SMRF strength becomes weak again toward the end of the growing season. Such a behavior is reminiscent of the dynamics of a system undergoing a periodic, stochastically forced pitchfork bifurcation. The presence of bimodal soil moisture behavior is also verified using nonparametric statistical tests on soil moisture data. The analysis of wet-to-wet and dry-to-dry soil moisture transitions in the joint probability distribution of soil moisture further corroborates the presence of hydro-climatic persistence in the spring-to-summer transition. Key Points Stochastic soil moisture-rainfall feedback model and the role of seasonality Soil moisture distribution may exhibit bimodal behavior at the start of the warm season The results corroborate the hypothesis of soil moisture-rainfall feedback © 2014. American Geophysical Union. All Rights Reserved.

Duke Scholars

Published In

Water Resources Research

DOI

EISSN

1944-7973

ISSN

0043-1397

Publication Date

January 1, 2014

Volume

50

Issue

7

Start / End Page

6053 / 6066

Related Subject Headings

  • Environmental Engineering
  • 4011 Environmental engineering
  • 4005 Civil engineering
  • 3707 Hydrology
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
  • 0406 Physical Geography and Environmental Geoscience
 

Citation

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ICMJE
MLA
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Yin, J., Porporato, A., & Albertson, J. (2014). Interplay of climate seasonality and soil moisture-rainfall feedback. Water Resources Research, 50(7), 6053–6066. https://doi.org/10.1002/2013WR014772
Yin, J., A. Porporato, and J. Albertson. “Interplay of climate seasonality and soil moisture-rainfall feedback.” Water Resources Research 50, no. 7 (January 1, 2014): 6053–66. https://doi.org/10.1002/2013WR014772.
Yin J, Porporato A, Albertson J. Interplay of climate seasonality and soil moisture-rainfall feedback. Water Resources Research. 2014 Jan 1;50(7):6053–66.
Yin, J., et al. “Interplay of climate seasonality and soil moisture-rainfall feedback.” Water Resources Research, vol. 50, no. 7, Jan. 2014, pp. 6053–66. Scopus, doi:10.1002/2013WR014772.
Yin J, Porporato A, Albertson J. Interplay of climate seasonality and soil moisture-rainfall feedback. Water Resources Research. 2014 Jan 1;50(7):6053–6066.
Journal cover image

Published In

Water Resources Research

DOI

EISSN

1944-7973

ISSN

0043-1397

Publication Date

January 1, 2014

Volume

50

Issue

7

Start / End Page

6053 / 6066

Related Subject Headings

  • Environmental Engineering
  • 4011 Environmental engineering
  • 4005 Civil engineering
  • 3707 Hydrology
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
  • 0406 Physical Geography and Environmental Geoscience