A5009040244- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Solar Radiation and Photovoltaics
- Impact of Light on Environment and Health
- Atmospheric chemistry and aerosols
- Skin Protection and Aging
- Nonlinear Waves and Solitons
- Atmospheric and Environmental Gas Dynamics
- Nonlinear Photonic Systems
- Advanced Mathematical Physics Problems
- Urban Heat Island Mitigation
- Remote Sensing in Agriculture
- Advanced Mathematical Theories and Applications
- Theoretical and Computational Physics
- Natural Language Processing Techniques
- Elasticity and Wave Propagation
- linguistics and terminology studies
- Advanced Image Fusion Techniques
- Building Energy and Comfort Optimization
- Solar Thermal and Photovoltaic Systems
- Second Language Acquisition and Learning
- Water Quality Monitoring and Analysis
- Quantum Mechanics and Non-Hermitian Physics
- Quasicrystal Structures and Properties
- Educational Innovations and Technology
Universitat de València
2011-2024
Universidad de Murcia
2014
Mediterranean Center for Environmental Studies
2007-2010
Universidad de Cádiz
2001-2003
Four methods have been used for the estimation of total cloud amount and low clouds: visual observations, Long method applied on pyranometer measurements, Automatic Partial Cloud Amount Detection Algorithm (APCADA) pyrgeometers ceilometer measurements base height. Records from meteorological observers indicate that clear days (0–1 octa) represent most frequent clouds. In contrast, is more aleatory. Results obtained show maximum frequency in extreme values. The APCADA also indicates...
An analysis is made of experimental ultraviolet erythemal solar radiation data measured during the years 2000 and 2001 by Spanish UV-B evaluation prediction network. This network consists 16 Robertson-Berger type pyranometers for evaluating five Brewer spectroradiometers stratospheric ozone. On basis these Ultraviolet Index (UVI) was evaluated measuring stations that are located either in coastal regions or more densely populated inland on Iberian Peninsula. It has been checked most cases...
Measurements of diffuse UV erythemal radiation (UVER) using a shadowband have been corrected the models proposed by Drummond (1956), LeBaron et al. (1990), and Batlles (1995). Two different methods were used to validate these models: intercomparison with an Optronic OL754 spectroradiometer comparison values simulated two radiative transfer codes, SMARTS SBDART. For this only clear days used. The experimental analyzed in order study average UVER fraction relation clearness index k t . These...
Abstract The influence of cloudiness over experimental UV erythemal radiation (UVER) has been studied. This analysed considering total and low clouds. measurements correspond to the daily values registered at 13:00 GMT Meteorological Centre Valencia, which is part State Agency Meteorology Spain (AEMET). UVER were made using a YES UVB‐1 radiometer located on roof terrace Physics Faculty Burjassot Campus, Valencia (latitude 39.508° , longitude − 0.418° 60 m above sea level). First, statistical...
Abstract Although ultraviolet B radiation (UVB), the solar band between 280 and 315 nm, is only a small fraction of extraterrestrial radiation, it accounts for 80% harmful effects exposure to sun. In this work values erythemal irradiance (UVER) measured in Valencia on horizontal plane period June 2003 2005 are analysed compared with measures UV (A + B) global irradiances plane. has been using YES‐UVB‐1 broadband radiometer; TUVR Eppley radiometer spectral response 290 385 nm Kipp Zonen model...
Using a sky camera, episodes characterized by overcast low clouds in the Valencia region of Spain have been selected for analysis. One year cloud optical depth data produced inverting UV erythemal irradiance measured with UVB-1 radiometer from Yankee Environmental Systems using LibRadtran radiative transfer model. Measurement uncertainties, aerosol single scattering albedo and properties are, order decreasing importance, most important factors influencing accuracy retrieval when radiometers....
Abstract Ultraviolet erythemal radiation (UVER) values have been simulated for different of column ozone and aerosol optical depth (AOD) using a multiple scattering model: SBDART. The results show that UVER decreased when atmospheric aerosols increased, with the having greater influence than AOD. To quantify these dependencies on has analysed values. This dependence was linear. Similarly, to this fixed AOD while varying ozone. expression found be second‐order polynomial. We also experimental...
Abstract Low ozone level episodes (also known as mini‐holes) have been analysed over Valencia, Spain, during the period from 1 January 2000 to 31 December 2007. In this study, 24 episodes, lasting or 2 days each, were detected. Most of them can be explained dynamically by existence an anticyclone Azores, which sends air masses coming Caribbean Iberian Peninsula. A positive anomaly in vertical temperature profile high troposphere and one negative medium low stratosphere are also observed most...
An analysis of the broadband solar irradiation, IT, and erythemal UV IUVER, has been performed using measurements made from 2013 to 2015 at three sites located altitudes over 1000 m a.s.l. In Northwestern Argentina (Salta, El Rosal, Tolar Grande). The main objective this paper is determine a relationship between IT which would allow estimate IUVER in places with few available, especially those where important establish adequate photoprotection measures given their dense population location...
The scattering properties of quantum particles on a sequence potentials converging towards fractal one are obtained by means the transfer matrix method. reflection coefficients for both potential and finite periodic calculated compared. It is shown that coefficient has self-similar structure associated with distribution whose degree self-similarity been quantified correlation function.
Fractal superlattices consist of a series thin layers two semiconductor materials alternately deposited on each other with widths corresponding to the rules construction fractal set. The scattering electrons in is obtained using transfer matrix method for generalized Cantor potentials that are characterized by lacunarity parameter. numerical results show self-similarity reflection coefficient and appearance lacunarity-independent energies perfectly transparent tunneling due bound states...
Abstract The values of three clearness indices have been measured for the city Valencia: k t , index whole solar spectrum, tUV ultraviolet range, and erythemal radiation tUVER corresponding to weighted by action spectrum on human skin, normalized with respect constant that spectrum. measurements reached were approximately 54% while those much smaller. Some statistics calculated both monthly as well hourly means. shape distribution in cases was nearly normal, so standard deviation variance...
An analysis is made of measured ultraviolet erythemal solar radiation (UVER) data recorded during the year 2003 by networks Catalan Weather Service and Environment Department Valencia (both on Spanish Mediterranean coast). Results show a latitudinal variation at sea level, 3–4% per degree an increase with altitude 10% km. Based these UV Index has been evaluated for measuring stations. The maximum experimental value was around 9 summer, although higher values were two stations, one highest...
An analysis is made of experimental ultraviolet erythemal solar radiation data measured during the years 2000 and 2001 by Spanish UV-B evaluation prediction network. This network consists 16 Robertson–Berger type pyranometers for evaluating five Brewer spectroradiometers stratospheric ozone. On basis these Ultraviolet Index (UVI) was evaluated measuring stations that are located either in coastal regions or more densely populated inland on Iberian Peninsula. It has been checked most cases...
Abstract Values of measured and modeled diffuse UV erythemal irradiance (UVER) for all sky conditions are compared on planes inclined at 40° oriented north, south, east west. The models used simulating UVER the geometric‐type, mainly Isotropic, Klucher, Hay, Muneer, Reindl Schauberger models. To analyze precision models, some statistical estimators were such as root mean square deviation, absolute deviation bias deviation. It was seen that analyzed reproduce adequately south‐facing plane,...
Specialised texts are characterised by, amongst other features, the presence of terminology which conveys domain-specific concepts that essential for specialist who is interested in analysing such texts. Automatic Term Recognition methods (ATR) employed to identify those terms automatically, especially helpful view large size corpora nowadays. However, they tend concentrate on identification Multi-Word Terms (MWTs) neglecting Single-Word (SWTs) a certain extent. This might be related greater...
Abstract The study uses a Monte Carlo radiative transfer model to examine the sensitivity of UV erythemal radiation (UVER) enhancement broken liquid water clouds cumulus and stratocumulus type. monochromatic at 310 nm corresponding approximately peak product between irradiance curve. All scattering, absorption, extinction coefficients, spectral albedos are tuned this wavelength. In order importance, fractional cloud cover, area individual patches, thickness exert strong influence on...
Abstract The study develops a simple but physically based model for estimating erythemal irradiance [(UV radiation (UVER)] cloudless urban regions with substantial aerosol load, such as that of the Valencia environment in Spain. estimates direct and diffuse UVER aerosol‐free conditions using LibRadtran DISORT algorithm. Aerosol optical thickness (τ aER ) is obtained residual term by comparing measured against modelled absence load. On average, τ 18% higher than data extrapolated to 305 nm...
ABSTRACT An analysis is made of measured ultraviolet erythemal solar radiation (UVER) data recorded during the year 2003 by networks Catalan Weather Service and Environment Department Valencia (both on Spanish Mediterranean coast). Results show a latitudinal variation at sea level, 3‐4% per degree an increase with altitude 10% km. Based these UV Index has been evaluated for measuring stations. The maximum experimental value was around 9 summer, although higher values were two stations, one...