Interannual-to-multidecadal Hydroclimate Variability and its
Sectoral Impacts in northeastern Argentina

Lovino, Miguel A.; Müller, Omar V.; Müller, Gabriela V.; Sgroi, Leandro Carlos; Baethgen, Walter E.

doi:10.5194/hess-2018-3

Cited by 4 publications

(4 citation statements)

References 54 publications

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“…Annual average temperature is 18-20℃, rainfall ranges from 250 to 400mm between spring and autumn and decreases to 60-150mm in winter (Servicio Meteorológico Nacional). Interannual variability of precipitation, mainly influenced by the El Niño Southern Oscillation (ENSO), favors the flood of Paraná river in cycles of 2-4 years [33].…”

Section: Study Areamentioning

confidence: 99%

Seroprevalence of leptospiral antibodies in rodents from riverside communities of Santa Fe, Argentina

et al. 2020

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Background Leptospirosis is a zoonotic disease that can be transmitted by contact with the urine of infected mammals. Rodents play a mayor role in the transmission of leptospires to humans. The province of Santa Fe reports the greatest number of cases in Argentina. Yet, in this region, there are still knowledge gaps regarding the diversity of rodent species that may be hosts of pathogenic leptospires. The aims of this study were to evaluate the presence of leptospiral antibodies in rodents from three riverside communities of Santa Fe, and to identify factors associated with leptospiral infection. Methodology/Principal findings Each community was divided into three environmental settings based on the level of human disturbance, and sampled during two springs (Sep-Oct 2014 and 2015) and one autumn (Mar-Apr 2015). Serum samples of captured sigmodontine and murine rodents were tested for leptospiral antibodies by enzyme-linked immunosorbent assay (ELISA), and microagglutination test (MAT) was used to assess the infecting serovar in seropositive individuals. Factors influencing seropositivity were analyzed using logistic regression models. We caught 119 rodents, of which 101 serums were suitable for analysis. Most frequently trapped species were Scapteromys aquaticus, Akodon azarae and Oligoryzomys spp., with seroprevalences of 41.3%, 42.9% and 55% respectively. Seropositivity was higher in individuals with an average body condition score and in those that were sexually mature, but in the latter the differences were marginally significant.

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Section: Study Areamentioning

confidence: 99%

Seroprevalence of leptospiral antibodies in rodents from riverside communities of Santa Fe, Argentina

et al. 2020

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“…The number of intense precipitation events has been growing steadily since 1970 in most of SESA (Skansi et al, 2013; Lovino et al, 2018a, Cerón et al, 2021). More frequent heavy precipitation events constitute a magnifying risk for urban settlements and agriculture, and cause significant infrastructure losses and decreased livestock productivity (Barros et al, 2015; Lovino et al, 2018a, b). On the other hand, longer dry events in recent decades suggest that more persistent short‐term droughts affect agricultural activities (Llano and Penalba, 2010; Sgroi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Extreme precipitation events in the Austral Chaco region of Argentina

Lovino

Müller

Pierrestegui

et al. 2022

Intl Journal of Climatology

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This study assesses the intensity, spatial distribution and temporal variability of extreme precipitation events (EPEs) on different time scales relevant to agriculture and water resources during the 1901–2016 period over Argentina's Austral Chaco (ACh). EPEs were identified using a nonparametric approach for the Standardized Precipitation Index (SPI). The leading modes of SPI's variability were detected using the Singular Spectrum Analysis. We also compile and control the quality of precipitation observations in a scarcely monitored region. The limited number of stations conditions the interpolation of the GPCC v2018 database here used, mainly during the early twentieth century. The EPEs characterized by SPI at a 24‐month time scale, which favour long‐lasting water excesses or deficits with hydrological impacts, underwent two differentiated long‐term periods: a dry one before 1960 and a wet one from 1960 to 2005. Consistently, seasonal wet EPEs were more frequent during the wet period while seasonal droughts were more frequent and with larger spatial extent during the dry period. Seasonal EPEs, represented by the SPI at 3‐month time scale, can impact agriculture during the crops' critical growth period. Since 2006, the long‐term wetting trend has been reversed. If this behaviour continues into the coming decades, more droughts and less wetness might be expected. The EPEs present a large interannual variability with 6.3‐ and 9‐year significant cycles that, combined with long‐term trends, favoured extremely wet/dry EPEs. Most of the wet/dry EPEs occurred during El Niño/La Niña events. Although this relationship is not straightforward, we found a discriminant ENSO signal between October of the year when an ENSO event starts and February of the next year. Finally, severely dry/wet EPEs tend to have large spatial extent in the ACh region. The central‐eastern ACh region experiences the most extreme wet and dry conditions, which makes this area more prone to extreme EPEs.

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“…The Pampas Plains is one of the most productive agricultural regions in South America and is therefore vulnerable to hydrological extremes such as floods and droughts on time scales relevant for agriculture (Lovino et al, 2014(Lovino et al, , 2018. The interplay between the meteorological extremes and land-use of this region frequently leads to non-harmonic interactions between ecosystem conservation, human well-being and efficient agriculture (Nosetto et al, 2009;Taboada et al, 2009;Viglizzo et al, 2009;Nosetto et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Can Smos Soil Moisture Dry-Downs Be Useful to Detect Flood Conditions Over the Argentinean Pampas Plains?

Cappelletti

Sörensson²,

Ruscica

et al. 2020

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The process of soil drying following a single rainfall input offers an integrated perspective on soil-vegetation water dynamics in responses to atmospheric conditions during periods without rainfall. In this work, the soil moisture dry-down time scale events (τ) was calculated using surface soil moisture data from the SMOS mission, with the objective to explore if the spatio-temporal variability of τ could be used as a proxy for regional flooding and waterlogging characterization. Our working hypothesis is that soil moisture dries up more slowly under flooded conditions as a result of slower surface water elimination by infiltration and capillary rise of water from the saturated zone close to the surface. A clear difference precipitation-moisture coupling was detected between two regions with different flooding dynamics. In a region where flooding is triggered by precipitation excesses on weekly-to-monthly time scales and where the coupling between precipitation and evapotranspiration is strong, a positive correlation between dry-down and 6-month accumulated precipitation anomaly was found for all seasons except winter. By contrast, in the other region where flooding is largely de-coupled from precipitation and evapotranspiration, but rather coupled to ground water table dynamics on time scales from several months to years, no significant correlations were found. These results are based on a short period of data: March 2010 – November 2014.

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Interannual-to-multidecadal Hydroclimate Variability and its Sectoral Impacts in northeastern Argentina

Abstract: Abstract. This study examines the relation between hydroclimate variability (precipitation, river discharge, temperature) and water resources, agriculture and human settlements at different time scales in northeastern Argentina. It also discusses the 10

Cited by 4 publications

References 54 publications

Seroprevalence of leptospiral antibodies in rodents from riverside communities of Santa Fe, Argentina

Seroprevalence of leptospiral antibodies in rodents from riverside communities of Santa Fe, Argentina

Extreme precipitation events in the Austral Chaco region of Argentina

Can Smos Soil Moisture Dry-Downs Be Useful to Detect Flood Conditions Over the Argentinean Pampas Plains?

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