A5084194871- Cryospheric studies and observations
- Stellar, planetary, and galactic studies
- Hydrology and Watershed Management Studies
- Astronomy and Astrophysical Research
- Climate variability and models
- Climate change and permafrost
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Hydrology and Drought Analysis
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Flood Risk Assessment and Management
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
- Calibration and Measurement Techniques
- Precipitation Measurement and Analysis
- Historical Studies on Spain
- Landslides and related hazards
- Water resources management and optimization
- Advanced Data Processing Techniques
- Adaptive optics and wavefront sensing
- International Science and Diplomacy
- Quality of Life Measurement
- Smart Materials for Construction
University of Chile
1986-2024
Universidad Católica del Norte
2021
University of California, Los Angeles
2013-2018
The Ohio State University
2014
Abstract. We introduce the first catchment dataset for large sample studies in Chile. This includes 516 catchments; it covers particularly wide latitude (17.8 to 55.0∘ S) and elevation (0 6993 m a.s.l.) ranges, relies on multiple data sources (including ground data, remote-sensed products reanalyses) characterise hydroclimatic conditions landscape of a region where situ measurements are scarce. For each catchment, provides boundaries, daily streamflow records basin-averaged time series...
Abstract A newly developed state-of-the-art snow water equivalent (SWE) reanalysis dataset over the Sierra Nevada (United States) based on assimilation of remotely sensed fractional snow-covered area data Landsat 5–8 record (1985–2015) is presented. The method (fully Bayesian), resolution (daily and 90 m), temporal extent (31 years), accuracy provide a unique for investigating processes. verified (based comparison with 9000 station years in situ data) exhibited mean root-mean-square errors...
Abstract This paper presents a newly proposed data assimilation method for historical snow water equivalent SWE estimation using remotely sensed fractional snow-covered area fSCA. The approach consists of particle batch smoother (PBS), which is compared to previously applied Kalman-based ensemble (EnBS) approach. methods were over the 27-yr Landsat 5 record at pillow and course in situ verification sites American River basin Sierra Nevada (United States). more densely vegetated thus...
Abstract We use two hydrological models of varying complexity to study the Juncal River Basin in Central Andes Chile with aim understand degree conceptualization and spatial structure that are needed model present future streamflows. a conceptual semi‐distributed based on elevation bands [Water Evaluation Planning (WEAP)], frequently used for water management, physically oriented, fully distributed [Topographic Kinematic Wave Approximation Integration ETH Zurich (TOPKAPI‐ETH)] developed...
Abstract We present new insights on extratropical Andean snow climatology (27°S to 37°S) based the results from a 31 year high‐resolution reanalysis. The water equivalent (SWE) estimates were generated by integrating observed depletion data Landsat together with model forced Modern‐era Retrospective Analysis for Research and Applications. spatial resolution (180 m), geographic extent (175,000 km 2 ), temporal span (1984–2015) constitute an unprecedented set region. SWE reaches annual peak...
Abstract Analysis of the Sierra Nevada (USA) snowpack using a new spatially distributed snow reanalysis data set, in combination with longer term situ data, indicates that water year 2015 was truly extreme (dry) year. The range‐wide peak volume characterized by return period over 600 years (95% confidence interval between 100 and 4400 years) having strong elevational gradient at lower elevations an order magnitude larger than those higher elevations. conditions, occurring on top three...
Abstract A data assimilation framework was implemented with the objective of obtaining high‐resolution retrospective snow water equivalent (SWE) estimates over several Andean study basins. The integrates Landsat fractional covered area (fSCA) images, a land surface and depletion model, Modern Era Retrospective Analysis for Research Applications (MERRA) reanalysis as forcing set. outputs are SWE fSCA fields (1985–2015) at resolution 90 m that consistent observed record. Verification using...
Abstract This paper used a data assimilation framework to estimate spatially and temporally continuous snow water equivalent (SWE) from 27 year reanalysis (from 1985 2011) of the Landsat‐5 record for Kern River watershed in Sierra Nevada, California. The approach explicitly treats sources uncertainty model parameters, meteorological inputs, observations. method is comprised two main components: (1) coupled land surface (LSM) depletion curve (SDC) model, which generate an ensemble predictions...
Abstract We provide a framework for careful analysis of the different methodological choices we make when constructing multimodel ensemble seasonal forecasts hydroclimatic variables. Specifically, focus on three common modeling decisions: (i) number models, (ii) combination approach, and (iii) lead time prediction. The scheme includes forecasting algorithm based nonparametric regression, set alternatives options previously pointed, selection probabilistic verification methods forecast...
Abstract. We introduce the first catchment data set for large sample studies in Chile (South America). The includes 516 catchments and provides boundaries, daily streamflow records basin-averaged time series of following hydrometeorological variables: 1) precipitation retrieved from four gridded sources; 2) maximum, minimum mean temperature; 3) potential evapotranspiration (PET); 4) 8-day accumulated PET; 5) snow water equivalent. In addition to hydro-meteorological series, we use diverse...
This paper quantifies the climatological contribution of atmospheric rivers (ARs) to annual snow accumulation in Andes Cordillera between 26.5° S and 36.5° S. An AR identification algorithm, a high-resolution (0.01°) reanalysis dataset, both especially developed for this mountainous region, are used quantification over 1984-2014 period. Results show that snowfall events explain approximately 50% study area, 2.5 times more intense than non-AR events. Due orographic precipitation enhancement...
A study of spectrophotometric observations some southern planetary nebulae, made during 1980 and 1981, to increase improve the absolute data for them detect objects special interest, is discussed. Observed H-beta fluxes, logarithmic reddening correctitons, intrinsic forbidden-line intensities relative are given 14 bright nebulae. The results study, as well those obtained from other authors, listed in tables compared.
The behavior of the atmospheric extinction at CTIO during 1984 is analyzed. Rayleigh scattering, aerosol extinction, and ozone absorption parameters are determined. different months year discussed.
Spectrophotometric observations of 15 stars in a magnitude range m between 8.0 and 10.9, located mostly near the equator covering all right ascensions, are presented. The energy distributions have been obtained Hayes' (1970) system as revised by Hayes Latham (1975), augmented presented Taylor (1984). Comments about some standard well comparison results with both systems.
In the dry Chilean North, impact of mountain snowpack on freshwater availability in adjacent lowlands areas is crucial. The correlation between snow water equivalent record and regionally averaged river discharges suggests that ~85% streamflow variance could be explained by alone. As seasonal cover depends few winter events, there a large year-to-year variability (SWE). Typically, are some years with very low annual precipitation which compensated wet years. However, since around 2010,...
Colorectal cancer (CRC) is the third leading cause of deaths in world. Standard drugs currently used for treatment advanced CRC-such as 5-fluorouracil (5FU)-remain unsatisfactory their results due to high toxicity, resistance, and adverse effects. In recent years, mitochondria have become an attractive target therapy higher transmembrane mitochondrial potential. We synthesized gallic acid derivatives linked a ten-carbon aliphatic chain associated with triphenylphosphonium (TPP