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Reconciling spatial and temporal soil moisture effects on afternoon rainfall
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....
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4366536/ https://www.ncbi.nlm.nih.gov/pubmed/25740589 http://dx.doi.org/10.1038/ncomms7443 |
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author | Guillod, Benoit P. Orlowsky, Boris Miralles, Diego G. Teuling, Adriaan J. Seneviratne, Sonia I. |
author_facet | Guillod, Benoit P. Orlowsky, Boris Miralles, Diego G. Teuling, Adriaan J. Seneviratne, Sonia I. |
author_sort | Guillod, Benoit P. |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-4366536 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-43665362015-04-02 Reconciling spatial and temporal soil moisture effects on afternoon rainfall Guillod, Benoit P. Orlowsky, Boris Miralles, Diego G. Teuling, Adriaan J. Seneviratne, Sonia I. Nat Commun Article 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. Nature Pub. Group 2015-03-05 /pmc/articles/PMC4366536/ /pubmed/25740589 http://dx.doi.org/10.1038/ncomms7443 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Guillod, Benoit P. Orlowsky, Boris Miralles, Diego G. Teuling, Adriaan J. Seneviratne, Sonia I. Reconciling spatial and temporal soil moisture effects on afternoon rainfall |
title | Reconciling spatial and temporal soil moisture effects on afternoon rainfall |
title_full | Reconciling spatial and temporal soil moisture effects on afternoon rainfall |
title_fullStr | Reconciling spatial and temporal soil moisture effects on afternoon rainfall |
title_full_unstemmed | Reconciling spatial and temporal soil moisture effects on afternoon rainfall |
title_short | Reconciling spatial and temporal soil moisture effects on afternoon rainfall |
title_sort | reconciling spatial and temporal soil moisture effects on afternoon rainfall |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4366536/ https://www.ncbi.nlm.nih.gov/pubmed/25740589 http://dx.doi.org/10.1038/ncomms7443 |
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