Maria Laura Bettolli

Maria Laura Bettolli
Universidad de Buenos Aires | UBA · Department of Atmospheric and Ocean Sciences

PhD

About

55
Publications
8,623
Reads
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690
Citations
Citations since 2017
23 Research Items
514 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Introduction
Climate Variability and Change, Climate Extremes, Regional Climate Studies, Statistical Downscaling
Skills and Expertise

Publications

Publications (55)
Article
Full-text available
Climate hazards associated with compound events (CE) have lately received increasing attention over South America (SA) due to their potential risks and amplification of impacts. This work addressed the evaluation of different temperature- and precipitation-based CE in SA considering the CORDEX-CORE ensemble of regional climate models (RCMs) and the...
Article
Full-text available
The representation of the South American Monsoon System (SAMS) by general circulation models (GCMs) is of key relevance for a better understanding of the physical rationale behind the recent climate changes over South Tropical South America (STSA) and their expected changes in a global warming scenario. During the last four decades, STSA experience...
Article
Empirical Statistical Downscaling (ESD) under the perfect prognosis approach was carried out to simulate daily maximum (Tx) and minimum temperatures (Tn) in 101 meteorological stations over the different climatic regions of Argentina. To this end, three ESD families were evaluated: analogs (AN), generalised linear models (GLM) and artificial neural...
Article
Full-text available
High-resolution rainfall information is of great value, particularly over southeastern South America (SESA) where the observed and projected climate changes pose a substantial threat to socio-economic activities and the hydrological sector. Consequently, this work focuses on the construction of an unprecedented multi-model ensemble of statistically...
Conference Paper
Full-text available
The representation of the South American Monsoon System (SAMS) by global climate models (GCMs) is of key relevance for a better comprehension of the physical mechanisms behind the recent and future climate changes over South Tropical South America (STSA) in a global warming scenario. During the last four decades STSA experimented a lengthening of t...
Poster
Regional climate models (RCMs) serve as a crucial tool for understanding climate and its application in vulnerability, impacts, and adaptation. In South America (SAM), there has been significant growth in the study of RCMs, mainly from a climatological perspective. Nevertheless, their capacity for representing extremes needs to be addressed. In the...
Poster
Full-text available
Se encontró un buen desempeño de los modelos de ESD sobre distintos aspectos de la precipitación diaria. La dispersión de los modelos estuvo típicamente contenida dentro de la incertidumbre observacional. No se detectó una configuración particular de ESD que resultara la más adecuada en todas las evaluaciones, indicando las ventajas de considerar u...
Preprint
Full-text available
High-resolution climate information is required over southeastern South America (SESA) for a better understanding of the observed and projected climate changes due to their strong socioeconomic and hydrological impacts. Thereby, this work focuses on the construction of an unprecedented multi-model ensemble of statistically downscaled global climate...
Article
Full-text available
The main features of daily extreme precipitation and circulation types in southern South America (SSA) were evaluated and compared in both multiple observational datasets (rain gauges, CHIRPS, CPC and MSWEP) and simulations from four regional climate models (RCMs) driven by ERA-Interim during 1980–2010. The inter-comparison of extreme events, chara...
Article
Full-text available
A collection of 10 high-impact extreme precipitation events occurring in Southeastern South America during the warm season has been analyzed using statistical (ESD) and dynamical downscaling approaches. Regional Climate Models from the CORDEX database for the South American domain at two horizontal resolutions, 50 km and 25 km, short-term simulatio...
Article
Full-text available
The performance of multiple empirical statistical downscaling (ESD) methods was assessed for simulating daily precipitation during 1979‐2017 over southeastern South America (SESA), a region where extremes are remarkable. Meteorological stations were used as reference and three gridded precipitation products were included to account for observationa...
Article
Full-text available
Southeastern South America (SESA) stands out as a remarkable region of occurrence of deep convection. This is mainly due to the proximity of the Andes, which eventually determine their magnitude and intensity. In this work, we used a set of convection-permitting (4 km horizontal resolution) regional climate models to explore their ability to reprod...
Article
Full-text available
Several temperature and precipitation indices, with special focus on extremes, were analysed in different sub‐regions of southern South America during 1979‐2017 using multiple reanalyses, the CPC gridded dataset and the most extended network of meteorological stations employed in regional climate studies up to date. Reanalyses generally well repres...
Article
Full-text available
The aim of this work is to present preliminary results of the statistical and dynamical simulations carried out within the framework of the Flagship Pilot Study in southeastern South America (FPS-SESA) endorsed by the Coordinated Regional Climate Downscaling Experiments (CORDEX) program. The FPS-SESA initiative seeks to promote inter-institutional...
Article
Full-text available
Southern South America (SSA) is an extended region where temperature and precipitation daily extreme events have several impacts on the different socio-economic activities. In this work, their individual and compound occurrence over SSA and their association with atmospheric circulation were studied during 1979–2015, using meteorological stations a...
Poster
Full-text available
The occurrence of extreme events was regionally conditioned by specific circulation types, like CP6w for Pr75, Tn90 and Tx90 and CP4w for Tn10 and Tx10. ❖ Heavy precipitation exhibited a significant increase over central-eastern Argentina and Uruguay, northeastern Argentina and southern Brazil, while warm (cold) extremes generally presented signif...
Poster
Daily extreme temperature and precipitation compound events in different datasets in southern South America IINTRODUCTION AND OBJECTIVES Southern South America (SSA) has regions with large urban settlements, where socioeconomic activities are highly vulnerable to extreme precipitation events. These events are commonly associated with a temperatur...
Conference Paper
Full-text available
In this work, the annual cycle of the 90th percentile of the daily rainfall distribution was evaluated and compared in different datasets with different sources. It was observed that the gridded datasets CLARIS and CPC underestimated the value of the percentile in all stations. The TRMM base tended to overestimate this value and failed to adequatel...
Article
La Plata Basin has a considerable socio‐economic value, being one of the most important agricultural and hydropower‐producing regions in the world. In this region, there is increasing evidence of a changing climate with more frequent and more intense extreme events. Despite the importance of empirical statistical downscaling for regional climate im...
Poster
Full-text available
Southeastern South America (SESA) covers central-northeastern Argentina, Uruguay and southern portions of Brazil and Paraguay (20-40 • S, 45-65 • W). It is a highly populated region with large urban settlements where socioeconomic activities are mainly based on rainfed agriculture and cattle rising. SESA has been characterized by a remarkable incre...
Article
Full-text available
Ch 7. Regional Climates: f. Europe and the Middle East
Article
Full-text available
This work focuses on the analysis of spatial and temporal variability of precipitation in the central region of southern Central Argentina (SCA), a climate transition area which has experienced an important agricultural expansion. For this purpose, gauge station precipitation datasets available in the area were extensively used. The annual cycle sh...
Article
Full-text available
In this paper we analyse the joint distribution of extreme temperature and heavy precipitation events in southern South America during 1961-2000, and the predominant atmospheric circulation associated with the occurrence of compound extreme events. We show that the probability of occurrence of intense precipitation (daily rainfall higher than the 7...
Article
Full-text available
Extreme climate events over the La Plata basin (LPB) can produce significant impacts due to the importance of its agriculture and hydroelectric power production for the local economy. Progresses on describing, projecting and understanding extremes in LPB, in the framework of the CLARIS-LPB Europe-South America Network for Climate Change Assessment...
Article
The interaction between land surface and atmosphere plays an important role in the climate system. Soil-atmosphere feedback mechanisms are analyzed through calculating the hydric condition (HC) of the soil from the water balance. Spatial coherence between HC and the Standardized Precipitation Index (SPI) as well as the circulation patterns associat...
Article
Monthly and daily precipitation extremes over La Plata Basin (LPB) are analyzed in the framework of the CLARIS-LPB Project. A review of the studies developed during the project and results of additional research are presented and discussed. Specific aspects of analysis are focused on large-scale versus local processes impacts on the intensity and f...
Conference Paper
Full-text available
La interacción entre el suelo, la vegetación y la atmósfera juega un papel importante en el sistema climático. La humedad y la condición hídrica del suelo se determinan por la temperatura y la precipitación a nivel local. La precipitación recarga directamente la humedad del suelo y el ciclo se completa a través de la evapotranspiración, que produce...
Article
The ability of 17 global circulation models to simulate daily rainfall of the Pampas region is assessed for winter and summer, key seasons for crop production in the region. Principal Component Analysis combined with k-means Cluster Analysis is employed to examine the models' representation of the relationship between daily sea level pressure of so...
Article
This paper studies the climatic conditions of warm and cold dry months in the humid and semi-humid Argentine region and some aspects of the regional circulation related to these cases. The climatic analysis of warm (temperatures above percentile 80) and cold (temperatures below percentile 20) dry months is based on precipitation and temperature dat...
Article
Full-text available
La Plata basin is one of the most important agricultural and hydropower-producing regions in the world. Extreme climate events such as cold and heat waves and frost events have a significant socioeconomic impact. This work analyzes the influence of the surface circulation in southern South America on daily maximum temperature T-MAX and daily minimu...
Article
Full-text available
This study investigates the spatial and temporal characteristics of cold surges that propagates northward along the eastern flank of the Andes from subtropical to tropical South America analysing wintertime in–situ daily minimum temperature observations from Argentina, Bolivia and Peru and ERA–40 reanalysis over the 1975–2001 period. Cold surges us...
Article
La Plata Basin is one of the most important agriculture and hydropower producing regions worldwide, where temporal and spatial variability of precipitation have a significant socio-economic impact. The aim of this work is to analyze the dependence of the daily precipitation in the south of La Plata Basin region on the large-scale circulation in Sou...
Article
This work proposes to employ the number of dry days (days without precipitation) as a variable of study, and to analyse their spatial and temporal variability in Argentina. Climatological aspects of dry days, such as their annual mean values and its seasonal cycle, were discussed and compared with precipitation features in the country. Linear trend...
Article
AbstractA Singular value decomposition (SVD) analysis was performed jointly on the daily intensity of extreme rainfall (DIER) over Argentina and the sea surface temperature (SST) of all the oceans from 17.5°N to 90°S in order to identify the large‐scale variability of the SSTs related to extreme rainfall, in the period 1962–2005. The main objective...
Article
Full-text available
Extreme precipitation (wet or dry) over La Plata Basin (LPB) can cause intense damage in several sectors as agriculture and hydroelectricity, and also has an impact on urban areas due to flooding and landslides. Extreme temperatures (cold incursions or heat waves) have impact on agriculture and health. The frequency and intensity of extremes can va...
Article
Full-text available
La regionalización de diferentes variables climáticas ha sido llevada a cabo en diversas zonas del mundo, dado que para distintos propósitos es conveniente dividir espacialmente la climatología de una variable en un número de áreas cuasi-homogéneas. El objetivo de este trabajo es la obtención de una regionalización objetiva de las distintas variabi...
Article
Full-text available
This work aimed to evaluate the relationship between natural pasture yield and climate variability in the district of Salto (Uruguay), and to analyze the possible implications of future climate change. Daily and monthly data from Salto meteorological station for the period 1961-1990 were used together with experimental data of pasture yield for the...
Article
Full-text available
This work aimed to evaluate the relationship between natural pasture yield and climate variability in the district of Salto (Uruguay), and to analyze the possible implications of future climate change. Daily and monthly data from Salto meteorological station for the period 1961-1990 were used together with experimental data of pasture yield for the...
Article
The Pampas covers Argentina's most productive agricultural land, extending more than 1600 km in the heartland of the country. The impact of climate adversities on agricultural activities makes it necessary to determine to what extent climate spatial and temporal variability is responsible for crop yields and to generate elements to monitor, estimat...
Article
During the past few decades there has been considerable effort devoted to obtaining a better understanding of natural climate variability on interannual to interdecadal timescales. To determine the mechanisms governing these climatic variations, it is essential to characterize the large-scale interactions between the ocean and the overlying atmosph...
Chapter
Full-text available
During the second half of the twentieth century, Southeastern South America experienced a positive trend in annual precipitation. Since Argentina is a country whose economy mostly relies on rain-fed agriculture, this trend has favoured the extension of the agricultural frontier, increasing the availability of productive lands. However, this precipi...
Article
Full-text available
This paper classifies daily geopotential height anomalies at the 1000 hPa and 500 hPa levels for the period 1979-2001, and examines the capability of these atmospheric patterns to discriminate between the occurrence and non-occurrence of rainfall in the core crop-producing region located in the Argentine Humid Pampas. The resulting optimal classifi...
Article
This paper analyses the soya bean yield variability in the Argentine Pampas in relation to the atmospheric circulation patterns in southern South America. The region studied is the main soya bean production area in Argentina and contributes a high percentage to world trade in soya beans and their by-products. Two datasets were used: the soya bean y...
Article
Full-text available
En este trabajo se discutieron aspectos metodológicos del uso del Análisis de Componentes Principales (ACP) a fin de verificar la eficacia del método para el conjunto de campos diarios de anomalías de altura geopotencial de 1000 y 500 hPa de los reanálisis 2 del NCEP en el sur de Sudamérica de los años 1979-2001 en el período comprendido entre octu...
Article
Full-text available
This paper presents a discussion of methodological aspects of the use of the principal component analysis (PCA) to verify its efficacy synthesis for the daily 1000 and 500 hPa anomalies of geopotential height fields of the October to May 1979-2001 NCEP reanalyses II in southern South America. This analysis was performed in order to obtain a represe...
Conference Paper
Full-text available
RESUMEN Este trabajo fue desarrollado para una región ganadera de base pastoril al noroeste de Uruguay, región que fue tomada como caso de estudio. Los objetivos incluyeron caracterizar el sistema pastoril desde el punto de vista biofísico y humano para: a) identificar las amenazas climáticas más importantes, b) comprender el efecto de estas amenaz...
Article
Climate variability is examined and discussed in this work, emphasizing its influence over the fluctuation of soybean yield in the Pampas (central-eastern Argentina). Monthly data of rainfall, maximum and minimum temperatures, thermal range and seasonal rainfall were analysed jointly with the soybean yield in the period 1973-2000. Low-frequency var...
Article
Full-text available
The aim of this paper is to study the relationships between hospital emergencies and weather conditions by analysing summer and winter cases of patients requiring attention at the emergency room of a hospital in the city of Buenos Aires, Argentina. Hospital data have been sorted into seven different diagnostic groups as follows: (1) respiratory, ca...

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