Summer soil-precipitation coupling in South America

The soil moisture memory contributes to atmospheric variability and seasonal predictability and could potentially affect the development of the South American Monsoon System. The relative importance of the local land surface feedbacks and the large-scale dynamical processes during the different phas...

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Autores principales: Sörensson, A.A., Menéndez, C.G.
Formato: JOUR
Materias:
advection
coupling
evapotranspiration
monsoon
precipitation (climatology)
soil moisture
summer
Brazil
La Plata Basin
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02806495_v63_n1_p56_Sorensson
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02806495_v63_n1_p56_Sorensson
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spelling todo:paper_02806495_v63_n1_p56_Sorensson2023-10-03T15:17:08Z Summer soil-precipitation coupling in South America Sörensson, A.A. Menéndez, C.G. advection coupling evapotranspiration monsoon precipitation (climatology) soil moisture summer Brazil La Plata Basin The soil moisture memory contributes to atmospheric variability and seasonal predictability and could potentially affect the development of the South American Monsoon System. The relative importance of the local land surface feedbacks and the large-scale dynamical processes during the different phases of the monsoon are still largely unknown. We examine the impacts of land surface conditions during the mature monsoon phase with the Rossby Centre Atmospheric regional model through calculating the coupling strength between soil moisture, evapotranspiration and precipitation. Regions of high coupling strength (hotspots) are identified and analysed focusing on the link between soil moisture-evapotranspiration coupling and soil moisture-precipitation coupling, the relation between the coupling strength and seasonal predictability and the hotspots importance for extreme precipitation events. La Plata Basin and northeastern Brazil are identified as hotspots due to evapotranspiration recycling. A region within the South Atlantic Convergence Zone is identified as a hotspot of precipitation explained by moisture advection. Extreme precipitation events are repressed in parts of La Plata Basin when the link between precipitation and soil moisture is cut through using prescribed soil moisture. ©2010 The Authors Tellus A©2010 International Meteorological Institute in Stockholm. Fil:Sörensson, A.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Menéndez, C.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02806495_v63_n1_p56_Sorensson
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic advection
coupling
evapotranspiration
monsoon
precipitation (climatology)
soil moisture
summer
Brazil
La Plata Basin
spellingShingle advection
coupling
evapotranspiration
monsoon
precipitation (climatology)
soil moisture
summer
Brazil
La Plata Basin
Sörensson, A.A.
Menéndez, C.G.
Summer soil-precipitation coupling in South America
topic_facet advection
coupling
evapotranspiration
monsoon
precipitation (climatology)
soil moisture
summer
Brazil
La Plata Basin
description The soil moisture memory contributes to atmospheric variability and seasonal predictability and could potentially affect the development of the South American Monsoon System. The relative importance of the local land surface feedbacks and the large-scale dynamical processes during the different phases of the monsoon are still largely unknown. We examine the impacts of land surface conditions during the mature monsoon phase with the Rossby Centre Atmospheric regional model through calculating the coupling strength between soil moisture, evapotranspiration and precipitation. Regions of high coupling strength (hotspots) are identified and analysed focusing on the link between soil moisture-evapotranspiration coupling and soil moisture-precipitation coupling, the relation between the coupling strength and seasonal predictability and the hotspots importance for extreme precipitation events. La Plata Basin and northeastern Brazil are identified as hotspots due to evapotranspiration recycling. A region within the South Atlantic Convergence Zone is identified as a hotspot of precipitation explained by moisture advection. Extreme precipitation events are repressed in parts of La Plata Basin when the link between precipitation and soil moisture is cut through using prescribed soil moisture. ©2010 The Authors Tellus A©2010 International Meteorological Institute in Stockholm.
format JOUR
author Sörensson, A.A.
Menéndez, C.G.
author_facet Sörensson, A.A.
Menéndez, C.G.
author_sort Sörensson, A.A.
title Summer soil-precipitation coupling in South America
title_short Summer soil-precipitation coupling in South America
title_full Summer soil-precipitation coupling in South America
title_fullStr Summer soil-precipitation coupling in South America
title_full_unstemmed Summer soil-precipitation coupling in South America
title_sort summer soil-precipitation coupling in south america
url http://hdl.handle.net/20.500.12110/paper_02806495_v63_n1_p56_Sorensson
work_keys_str_mv AT sorenssonaa summersoilprecipitationcouplinginsouthamerica
AT menendezcg summersoilprecipitationcouplinginsouthamerica
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