Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot
Southeastern South America has been identified as a hot spot of soil moisture and evapotranspiration coupling efficiency during austral summer in a previous study. Here, hydrological processes such as coupling and memory of soil moisture, evapotranspiration and precipitation and the links between th...
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2014
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paper:paper_08998418_v34_n14_p3641_Ruscica2023-06-08T15:49:43Z Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot Ruscica, Romina Sorensson, Anna Amelia Menendez, Claudio Guillermo Evapotranspiration La Plata Basin Precipitation Regional climate modelling Soil moisture memory Southeastern South America Efficiency Evapotranspiration Moisture Precipitation (chemical) Precipitation (meteorology) Rain Soils Coupling efficiency Hydrological process Initial conditions La Plata basin Moisture conditions Regional climate modelling Southeastern South America Statistical persistence Soil moisture Southeastern South America has been identified as a hot spot of soil moisture and evapotranspiration coupling efficiency during austral summer in a previous study. Here, hydrological processes such as coupling and memory of soil moisture, evapotranspiration and precipitation and the links between these variables are discussed on the daily time scale over this region. The correlations between surface variables, rainfall persistence and soil moisture memory are discussed over three subregions selected on basis of their coupling efficiency and mean daily intensity of precipitation. The relationship between surface climate and land cover is qualitatively assessed. The memory, or statistical persistence, is longer and has a more robust spatial pattern for the root zone than for the top soil moisture. Where the coupling efficiency between soil moisture and evapotranspiration is high, the evapotranspiration is regulated by soil moisture conditions independently on the intensity of precipitation, whereas in a region with low coupling efficiency and high intensity, the evapotranspiration is regulated by the atmosphere. The coupling efficiency is in general related to the memory of the root-zone layer, since the soil state is modified when the soil moisture and the atmosphere interact, resulting in an anticorrelation between these metrics. The persistence of rainfall is another factor that modulates the memory. Nevertheless, there are some areas around the La Plata River where both the coupling efficiency and the memory are relatively high, such as Uruguay and the northeast of Argentina, where an improvement of soil moisture initial conditions could improve predictability of surface variables on a monthly timescale. © 2014 Royal Meteorological Society. Fil:Ruscica, R.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 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. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v34_n14_p3641_Ruscica http://hdl.handle.net/20.500.12110/paper_08998418_v34_n14_p3641_Ruscica |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Evapotranspiration La Plata Basin Precipitation Regional climate modelling Soil moisture memory Southeastern South America Efficiency Evapotranspiration Moisture Precipitation (chemical) Precipitation (meteorology) Rain Soils Coupling efficiency Hydrological process Initial conditions La Plata basin Moisture conditions Regional climate modelling Southeastern South America Statistical persistence Soil moisture |
| spellingShingle |
Evapotranspiration La Plata Basin Precipitation Regional climate modelling Soil moisture memory Southeastern South America Efficiency Evapotranspiration Moisture Precipitation (chemical) Precipitation (meteorology) Rain Soils Coupling efficiency Hydrological process Initial conditions La Plata basin Moisture conditions Regional climate modelling Southeastern South America Statistical persistence Soil moisture Ruscica, Romina Sorensson, Anna Amelia Menendez, Claudio Guillermo Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot |
| topic_facet |
Evapotranspiration La Plata Basin Precipitation Regional climate modelling Soil moisture memory Southeastern South America Efficiency Evapotranspiration Moisture Precipitation (chemical) Precipitation (meteorology) Rain Soils Coupling efficiency Hydrological process Initial conditions La Plata basin Moisture conditions Regional climate modelling Southeastern South America Statistical persistence Soil moisture |
| description |
Southeastern South America has been identified as a hot spot of soil moisture and evapotranspiration coupling efficiency during austral summer in a previous study. Here, hydrological processes such as coupling and memory of soil moisture, evapotranspiration and precipitation and the links between these variables are discussed on the daily time scale over this region. The correlations between surface variables, rainfall persistence and soil moisture memory are discussed over three subregions selected on basis of their coupling efficiency and mean daily intensity of precipitation. The relationship between surface climate and land cover is qualitatively assessed. The memory, or statistical persistence, is longer and has a more robust spatial pattern for the root zone than for the top soil moisture. Where the coupling efficiency between soil moisture and evapotranspiration is high, the evapotranspiration is regulated by soil moisture conditions independently on the intensity of precipitation, whereas in a region with low coupling efficiency and high intensity, the evapotranspiration is regulated by the atmosphere. The coupling efficiency is in general related to the memory of the root-zone layer, since the soil state is modified when the soil moisture and the atmosphere interact, resulting in an anticorrelation between these metrics. The persistence of rainfall is another factor that modulates the memory. Nevertheless, there are some areas around the La Plata River where both the coupling efficiency and the memory are relatively high, such as Uruguay and the northeast of Argentina, where an improvement of soil moisture initial conditions could improve predictability of surface variables on a monthly timescale. © 2014 Royal Meteorological Society. |
| author |
Ruscica, Romina Sorensson, Anna Amelia Menendez, Claudio Guillermo |
| author_facet |
Ruscica, Romina Sorensson, Anna Amelia Menendez, Claudio Guillermo |
| author_sort |
Ruscica, Romina |
| title |
Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot |
| title_short |
Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot |
| title_full |
Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot |
| title_fullStr |
Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot |
| title_full_unstemmed |
Hydrological links in Southeastern South America: Soil moisture memory and coupling within a hot spot |
| title_sort |
hydrological links in southeastern south america: soil moisture memory and coupling within a hot spot |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v34_n14_p3641_Ruscica http://hdl.handle.net/20.500.12110/paper_08998418_v34_n14_p3641_Ruscica |
| work_keys_str_mv |
AT ruscicaromina hydrologicallinksinsoutheasternsouthamericasoilmoisturememoryandcouplingwithinahotspot AT sorenssonannaamelia hydrologicallinksinsoutheasternsouthamericasoilmoisturememoryandcouplingwithinahotspot AT menendezclaudioguillermo hydrologicallinksinsoutheasternsouthamericasoilmoisturememoryandcouplingwithinahotspot |
| _version_ |
1768544601435537408 |