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Reconciling spatial and temporal soil moisture effects on afternoon rainfall

Author
Organization
Abstract
Soil moisture impacts on precipitation have been strongly debated. Recent observational evidence of afternoon rain falling preferentially over land parcels that are drier than the surrounding areas (negative spatial effect), contrasts with previous reports of a predominant positive temporal effect. However, whether spatial effects relating to soil moisture heterogeneity translate into similar temporal effects remains unknown. Here we show that afternoon precipitation events tend to occur during wet and heterogeneous soil moisture conditions, while being located over comparatively drier patches. Using remote-sensing data and a common analysis framework, spatial and temporal correlations with opposite signs are shown to coexist within the same region and data set. Positive temporal coupling might enhance precipitation persistence, while negative spatial coupling tends to regionally homogenize land surface conditions. Although the apparent positive temporal coupling does not necessarily imply a causal relationship, these results reconcile the notions of moisture recycling with local, spatially negative feedbacks.
Keywords
VARIABILITY, EVAPOTRANSPIRATION, ATMOSPHERIC CONTROLS, SURFACE IRRADIANCES, LAND, EVAPORATION, SCALE, FEEDBACK, STRATIFORM PRECIPITATION, ENERGY SYSTEM CERES

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Citation

Please use this url to cite or link to this publication:

MLA
Guillod, Benoit P., et al. “Reconciling Spatial and Temporal Soil Moisture Effects on Afternoon Rainfall.” NATURE COMMUNICATIONS, vol. 6, 2015, doi:10.1038/ncomms7443.
APA
Guillod, B. P., Orlowsky, B., Miralles, D., Teuling, A. J., & Seneviratne, S. I. (2015). Reconciling spatial and temporal soil moisture effects on afternoon rainfall. NATURE COMMUNICATIONS, 6. https://doi.org/10.1038/ncomms7443
Chicago author-date
Guillod, Benoit P, Boris Orlowsky, Diego Miralles, Adriaan J Teuling, and Sonia I Seneviratne. 2015. “Reconciling Spatial and Temporal Soil Moisture Effects on Afternoon Rainfall.” NATURE COMMUNICATIONS 6. https://doi.org/10.1038/ncomms7443.
Chicago author-date (all authors)
Guillod, Benoit P, Boris Orlowsky, Diego Miralles, Adriaan J Teuling, and Sonia I Seneviratne. 2015. “Reconciling Spatial and Temporal Soil Moisture Effects on Afternoon Rainfall.” NATURE COMMUNICATIONS 6. doi:10.1038/ncomms7443.
Vancouver
1.
Guillod BP, Orlowsky B, Miralles D, Teuling AJ, Seneviratne SI. Reconciling spatial and temporal soil moisture effects on afternoon rainfall. NATURE COMMUNICATIONS. 2015;6.
IEEE
[1]
B. P. Guillod, B. Orlowsky, D. Miralles, A. J. Teuling, and S. I. Seneviratne, “Reconciling spatial and temporal soil moisture effects on afternoon rainfall,” NATURE COMMUNICATIONS, vol. 6, 2015.
@article{6873897,
  abstract     = {{Soil moisture impacts on precipitation have been strongly debated. Recent observational evidence of afternoon rain falling preferentially over land parcels that are drier than the surrounding areas (negative spatial effect), contrasts with previous reports of a predominant positive temporal effect. However, whether spatial effects relating to soil moisture heterogeneity translate into similar temporal effects remains unknown. Here we show that afternoon precipitation events tend to occur during wet and heterogeneous soil moisture conditions, while being located over comparatively drier patches. Using remote-sensing data and a common analysis framework, spatial and temporal correlations with opposite signs are shown to coexist within the same region and data set. Positive temporal coupling might enhance precipitation persistence, while negative spatial coupling tends to regionally homogenize land surface conditions. Although the apparent positive temporal coupling does not necessarily imply a causal relationship, these results reconcile the notions of moisture recycling with local, spatially negative feedbacks.}},
  articleno    = {{6443}},
  author       = {{Guillod, Benoit P and Orlowsky, Boris and Miralles, Diego and Teuling, Adriaan J and Seneviratne, Sonia I}},
  issn         = {{2041-1723}},
  journal      = {{NATURE COMMUNICATIONS}},
  keywords     = {{VARIABILITY,EVAPOTRANSPIRATION,ATMOSPHERIC CONTROLS,SURFACE IRRADIANCES,LAND,EVAPORATION,SCALE,FEEDBACK,STRATIFORM PRECIPITATION,ENERGY SYSTEM CERES}},
  language     = {{eng}},
  pages        = {{6}},
  title        = {{Reconciling spatial and temporal soil moisture effects on afternoon rainfall}},
  url          = {{http://doi.org/10.1038/ncomms7443}},
  volume       = {{6}},
  year         = {{2015}},
}

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