A5087726940- Atmospheric Ozone and Climate
- Climate variability and models
- Atmospheric chemistry and aerosols
- Ionosphere and magnetosphere dynamics
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Tree-ring climate responses
- Meteorological Phenomena and Simulations
- Solar Radiation and Photovoltaics
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Geology and Paleoclimatology Research
- Geomagnetism and Paleomagnetism Studies
- Cryospheric studies and observations
- Horticultural and Viticultural Research
- Plant Water Relations and Carbon Dynamics
- Tropical and Extratropical Cyclones Research
- GNSS positioning and interference
- Calibration and Measurement Techniques
- Climate Change Communication and Perception
- Environmental and Ecological Studies
- Geological and Geophysical Studies Worldwide
- Historical and socio-economic studies of Spain and related regions
- Inorganic Fluorides and Related Compounds
- Precipitation Measurement and Analysis
Consejo Nacional de Investigaciones Científicas y Técnicas
2013-2024
National Technological University
2003-2024
Centro Científico Tecnológico - San Juan
2008-2017
Pontificia Universidad Católica Argentina
2006-2016
University of Central Arkansas
2010-2011
Fundación Ciencias Exactas y Naturales
2001-2006
University of Buenos Aires
1998-2005
Universidad Nacional de La Plata
1999-2001
University of Washington
1994-1995
Abstract Observations are the foundation for understanding climate system. Yet, currently available land meteorological data highly fractured into various global, regional, and national holdings different variables time scales, from a variety of sources, in mixture formats. Added to this, many still inaccessible analysis usage. To meet modern scientific societal demands as well emerging needs such provision services, it is essential that we improve management curation land-based holdings. We...
Recent studies have shown that the tropical belt (TB) has progressively expanded since at least late 1970s. This trend been largely attributed to radiative forcing due greenhouse gas (GHG) increase and stratospheric ozone depletion, even if an influence of sea surface temperature (SST) anomalies also suggested. The impact Pacific decadal oscillation (PDO) on TB width is investigated in this work. study performed by using both Atmospheric Model Intercomparison Project (AMIP) idealized...
Data from the Microwave Limb Sounder instrument on Upper Atmosphere Research Satellite are used to compare two periods of Kelvin wave activity during different stages equatorial quasi-biennial oscillation. The analysis is carried out using an asynoptic mapping technique. A wide bandpass filter isolate frequency bands where waves have been identified in previous studies. Time–height and time–latitude plots bandpassed data identify temperature ozone fields. Frequency spectra amplitudes...
Abstract A new eigentechnique approach, Principal Sequence Pattern Analysis (PSPA), is introduced for the analysis of spatial pattern sequence, as an extension traditional Component set in T‐Mode. In this setting, variables are sequences k fields a given meteorological variable. PSPA described and applied to sample 256 consecutive daily 1000 hPa geopotential height fields. The results application technique 5‐day demonstrate advantages procedure identifying field sequences, thereby allowing...
Abstract Mendoza Province is the major Argentinian vitivinicultural region, and its grape production fundamental for national vintage. The 1979–2009 climate–annual yield relationships are analyzed, total shown to depend significantly on regional “summer” (October–March) precipitation. Precipitation negatively affects yields through plant disease damage/destruction by hail. At interannual scales, summer precipitation variability can explains 25% of variance. Summer modulates with a 6–8-yr...
Tropical social-ecological systems are highly vulnerable to climate change, given the limited natural variability in tropics. rural populations, with livelihoods dependent on agriculture, particularly and changes. To develop change social communication, plan implement adaptation, it is necessary understand regional/local process, risks opportunities. It also important how local populations perceive such changes adapt their livelihoods. Limited information available perceptions tropical Latin...
During the austral autumn of 1997, a sequence record low ozone events with anomalous behavior occurred at subtropical latitudes to midlatitudes over southern South America, also known as Cone (Chile, Argentina, Uruguay, and Southern Brazil). The extreme took place in May early June i.e., time year when according climatological studies for Northern Hemisphere miniholes, most significant would not be expected (if such could simply extrapolated Hemisphere). first prominent minihole,...
A method is derived for estimating the Kelvin wave contribution to vertical flux of westerly momentum in equatorial stratosphere, which based on temperature and geopotential perturbations. This used estimate transfer due activity as from cryogenic limb array etalon spectrophotometer (CLAES) data set, onset phase QBO during 1992 first few months 1993, that is, part Upper Atmosphere Research Satellite (UARS) mission. The results are compared with zonal winds observed by high‐resolution Doppler...
Satellite‐derived climatologies of UV index (UVI) and erythemal daily dose were determined for Argentina at a geographical resolution 0.5° latitude by longitude. Total Ozone Mapping Spectrometer climatology key input parameters was used to calculate the clear‐sky ground‐level solar irradiance. NASA Surface meteorology Solar Energy cloud cover data determine attenuation clouds. Two cases tested: (1) monthly averages total (2) three ranges percentage (0–10%, 10–70%, 70–100%). Case 2, with...
Abstract Argentine operational rawinsonde records spanning a 30‐year period (1968–1997) were used to study the climatology of tropopause from subtropics southern mid‐latitudes, approximately along 60°W meridian. The thermal annual cycle as well its variability was analyzed at three sites: Resistencia (RES), Ezeiza (EZE), and Comodoro Rivadavia (CRD). Single double observations studied, given comparatively frequent occurrence events all sites. behavior RES CRD is distinct, whereas EZE it...
ABSTRACT A statistical analysis of 100‐year historic Southern Annular Mode (SAM) time series is carried out, for a set indices calculated by different methods, in view to understanding their value as simple indicators climate variability and the physical processes involved, particularly early part 20th century. Historic SAM available literature are analysed together with ones using 20th‐century reanalysis. preliminary comparison out standard space correlations. Distinct differences observed...
Abstract The lower stratosphere monthly temperature anomalies over the Southern Hemisphere derived from soundings made by Microwave Sounding Unit (MSU) between 1979 and 1997 are analysed. Specifically MSU channel 4 retrievals considered. Principal component (PC) analysis with S‐mode approach is used in order to isolate grid points that covary a similar manner determine main features of their temporal behaviour. first six PCs explain 81.3% variance represent different time variability...
Temperature and ozone data from the Microwave Limb Sounder (MLS) instrument on UARS are used to analyze variability of Kelvin wave activity during first two years mission. The analysis is carried out using asynoptic mapping technique. Time frequency plots for zonal wavenumbers 1 2, at heights representing middle stratosphere stratopause, respectively, temporal waves, its possible relationship equatorial quasi‐biennial oscillation (QBO) semiannual (SAO). reaches a maximum solstice seasons...
The variability of atmospheric midlatitudinal ozone between 1980 and 2000 over the Southern Hemisphere is discussed. distribution change during seasonal cycle discussed using Total Ozone Mapping Spectrometer Nimbus Earth Probe data binned at 72 (30° longitude by 5° latitude) bins, 60° 30°S. Rather than a standard trend approach, annual mean time series for each bin were fitted with cubic polynomial. results show that in zonal sense there sizable, latitude‐dependent slowdown loss from early...
Deforestation/land-use changes are major drivers of regional climate change in central South America, impacting upon Amazonia and Gran Chaco ecoregions. Most experimental modeling studies have focused on the resulting perturbations within Amazonia. Using Regional Climate Model PRECIS, driven by ERA-40 reanalysis ECHAM4 Baseline model for period 1961–2000 (40-year runs), potential effects deforestation/land-use these other neighboring ecoregions evaluated. Current 2002 estimated 2030 land-use...
Abstract Monthly lower stratosphere temperature anomalies in a layer centred about 70 hPa, from the MSU data set are analysed for period 1979–1997. T‐mode approach principal component analysis (PCA) is used order to obtain leading spatial anomaly patterns and their sequences of occurrence throughout under study. Five components (PCs) significantly different distribution noisy data. The given by PC scores represent ten typical patterns: five correspond direct mode, that say fields with same...
Abstract. Monthly mean NCEP reanalysis potential vorticity fields at the 650 K isentropic level over Northern and Southern Hemispheres between 1979 1997 were studied using multivariate analysis tools. Principal component in T-mode was applied to demonstrate validity of such statistical techniques for study stratospheric dynamics climatology. The method, complementarily both raw anomaly fields, useful determining classifying characteristics winter summer PV on hemispheres, particular,...
Abstract The relationship between the October (spring) total ozone column (TOC) midlatitude zonal asymmetry over Southern Hemisphere (SH) and stratospheric quasi-stationary wave 1 (QSW1) interannual phase variability is analyzed. Once contributions to TOC from known global predictors, estimated with a multiregression model, are removed, residual observed be dynamically coupled QSW1 behavior. variability, when classified according specifically designed indices, yields different circulation...
ABSTRACT There is growing evidence of significant changes in components the Antarctic climate system, an important issue given influence Antarctica has on global climate. It to infer what extent these regional could be attributed human‐induced processes and natural variability. Standard methods such as linear trend estimates or piecewise trends can inadequate because they may result erratic, non‐systematic results, particularly if different scales variability are present each record various...
The recovery of early records maximum, minimum, and mean temperatures; pressure; relative humidity measurements in Puerto Madryn for the period 1902–1915 is presented. A careful evaluation quality data was performed using internal coherence, tolerance, temporal consistency tests. monthly series all variables, constructed from daily raw data, were subject to several homogeneity tests, only discontinuities pressure found. homogenized compared with Twentieth Century Reanalysis annual seasonal...