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Journal articles on the topic 'Solar radiation flux density'

Author: Grafiati

Published: 28 May 2022

Last updated: 25 July 2025

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1

Andreychuk, Vladimir, and Yaroslav Filyuk. "ANALYSIS OF THE ENERGY POTENTIAL OF SOLAR LIGHT OF THE WESTERN REGION OF UKRAINE WITH THE ACCOUNT OF CLIMATIC CONDITIONS." EUREKA: Physics and Engineering 4 (July 31, 2017): 25–32. http://dx.doi.org/10.21303/2461-4262.2017.00398.

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An experimental facility for measuring and recording the flux density of solar radiation is designed and installed. An electrical circuit is developed and a pyranometer model is developed to measure the level of solar radiation, and it is graduated with a Soler Power Meter DT-1307 solar radiation flux meter. The time distribution of the flux density of solar energy is analyzed and the surface energy density of solar radiation is calculated for Ternopil. The influence of climatic conditions on the energy of solar radiation is determined. Analytical dependencies are obtained on the basis of comp

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2

Vasiluta, Petre, Ileana Ioana Cofaru, Nicolae Florin Cofaru, and Dragos Laurentiu Popa. "Studies of the Solar Radiations' Influence About Geomembranes Used in Ecological Landfill." ACTA Universitatis Cibiniensis 69, no. 1 (2017): 148–54. http://dx.doi.org/10.1515/aucts-2017-0019.

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Abstract The study shown in this paper presents the behavior of geomembranes used at the ecological landfills. The influences of the solar radiations has a great importance regarding the correct mounting of the geomembranes. The mathematical model developed for the determination anytime and anywhere in the world for the next values and parameters: apparent solar time, solar declination, solar altitude, solar azimuth and incidence angle, zone angle, angle of sun elevation, solar declination, solar constant, solar flux density, diffuse solar radiation, global radiation, soil albedo, total radian

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3

Сетов, Артём, Artem Setov, Мария Глоба, et al. "First results of absolute measurements of solar flux at the Irkutsk Incoherent Scatter Radar (IISR)." Solar-Terrestrial Physics 4, no. 3 (2018): 24–27. http://dx.doi.org/10.12737/stp-43201804.

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The Irkutsk Incoherent Scatter Radar (IISR) allows us to carry out passive radio observations of the Sun and other powerful radio sources. We describe a method for absolute measurements of spectral flux density of solar radiation at IISR. The absolute measurements are meant to determine the flux density in physical units [W·m–2·Hz–1]. The IISR antenna is a horn with frequency beam steering, therefore radio sources can be observed at different frequencies. Also there is a polarization filter in the antenna aperture, which passes only single (horizontal) polarization. To acquire flux density abs

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4

Schubnell, M., J. Keller, and A. Imhof. "Flux Density Distribution in the Focal Region of a Solar Concentrator System." Journal of Solar Energy Engineering 113, no. 2 (1991): 112–16. http://dx.doi.org/10.1115/1.2929954.

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In high temperature solar energy applications highly concentrating optical systems, such as, e.g., parabolic dishes, achieve typical radiation flux densities >2 MW/m2. In order to investigate thermo and photochemical reactions at temperatures >1500 K and radiation flux densities >2 MW/m2 a solar furnace was built at Paul Scherrer Institute (PSI). This furnace is a two-stage concentrator. The first stage is a prefocusing glass heliostat with a focal length of 100 m. The second stage is a highly concentrating parabolic dish with a focal length of 1.93 m. To design experiments to be carr

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Poudel, P., N. Parajuli, A. Gautam, et al. "Wavelet and Cross-Correlation Analysis of Relativistic Electron Flux with Sunspot Number, Solar Flux, and Solar Wind Parameters." Journal of Nepal Physical Society 6, no. 2 (2020): 104–12. http://dx.doi.org/10.3126/jnphyssoc.v6i2.34865.

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The Geostationary Operational Environmental Satellites (GOES) have been monitoring the Earth's radiation environment and is providing the electron flux data (of energy >0.8 MeV, >2 MeV, and >4 MeV) by means of a connected sensor subsystem. Relativistic electron flux is one of the components of the radiation belt which not only affects the electrical system in satellites but also has an impact on Earth’s upper atmospheric climatic variation. We have carried out a study to determine the relation of sunspot number (R), solar flux (F10.7), and solar wind parameters i.e., solar wind veloci

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Сетов, Артём, Artem Setov, Мария Глоба, et al. "First results of absolute measurements of solar flux at the Irkutsk Incoherent Scatter Radar (IISR)." Solnechno-Zemnaya Fizika 4, no. 3 (2018): 33–38. http://dx.doi.org/10.12737/szf-43201804.

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The Irkutsk Incoherent Scatter Radar (IISR) allows us to carry out passive radio observations of the Sun and other powerful radio sources. We describe a method for absolute measurements of spectral flux density of solar radiation at IISR. Absolute measurements are meant to determine the flux density in physical units [W·m–2·Hz–1]. The IISR antenna is a horn with frequency beam steering, therefore radio sources can be observed at different frequencies. Also there is a polarization filter in the antenna aperture, which passes only single (horizontal) polarization. To acquire flux density absolut

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7

Fernández-Reche, Jesús, Loreto Valenzuela, and Diego Pulido-Iparraguirre. "Measuring Concentrated Solar Radiation Flux in a Linear Fresnel-Type Solar Collector." Solar 2, no. 4 (2022): 401–13. http://dx.doi.org/10.3390/solar2040024.

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Linear Fresnel solar collectors are a promising and emerging solution to contribute to renewable heat supply in industrial processes with thermal energy demand in the medium temperature range (<250 °C). An innovative linear Fresnel collector (LFC) prototype has been designed, patented, and built at the Plataforma Solar de Almería (PSA), Spain. This work presents the applied methodology, experimental device, and results obtained in the measurement of the flux density of concentrated solar radiation in the focal plane of the solar collector. The experimental results confirm that an average fl

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Parretta, A., A. Antonini, M. Armani, G. Nenna, G. Flaminio, and M. Pellegrino. "Double-cavity radiometer for high-flux density solar radiation measurements." Applied Optics 46, no. 12 (2007): 2166. http://dx.doi.org/10.1364/ao.46.002166.

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9

Anshebo, Getachew Alemu, Ataklti Abraha Gebreyohanes, and Bizuayehu Bogale Dessie. "Green Energy: An Ideal Energy Solution for Sustainable Development of Afar Region, Ethiopia." Journal of Energy 2023 (March 24, 2023): 1–11. http://dx.doi.org/10.1155/2023/8849321.

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Green energy is the primary concern for the sustainable development of Ethiopia’s Afar region. The study’s goals are to present scientific evidence of the Afar region’s energy potential to researchers and industry sectors. We used solar shortwave, radiation transfer model, miniscale meteorological model for the Weather Research Forecast (WRF), and spatial and temporal simulation as research techniques. The data show that the Afar region has an energy potential of 239.9 W/m2 average solar radiation flux, 2.102 MW·h/m2 average annual solar density, 131.18 W/m2 average wind power density at h = 1

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10

Matuszewska, K., T. Velusamy, V. Adumitroaie, et al. "Variability of Jupiter’s Synchrotron Radiation: Goldstone Apple Valley Radio Telescope (GAVRT) Observations -II." Publications of the Astronomical Society of the Pacific 134, no. 1038 (2022): 084401. http://dx.doi.org/10.1088/1538-3873/ac6a7a.

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Abstract Jupiter’s decimeter-wavelength flux density is dominated by synchrotron emission from magnetically trapped ∼5–50 MeV electrons in the radiation belts. Synchrotron radio emission remains the most useful diagnostic of the radiation belts, and a global picture is provided by ground-based observations. Monitoring of the long-term variations of Jupiter’s Synchrotron Radiation (JSR) flux density is crucial to understanding its relationship with the solar wind. The GAVRT (Goldstone-Apple Valley Radio Telescope) program operates two retired Deep Space Network (DSN) antennas, and as part of th

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Maghrabi, A. "Ultraviolet Radiation Quasi-Periodicities and Their Possible Link with the Cosmic Ray and Solar Interplanetary Data." Advances in Meteorology 2024 (March 19, 2024): 1–10. http://dx.doi.org/10.1155/2024/1165223.

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In this study, solar ultraviolet (UV) radiation data collected in Riyadh, Saudi Arabia, between 2015 and 2022 were analyzed to explore quasi-periodicities in the UV time series. The power spectrum density analysis revealed several local peaks that exceeded the 95% confidence interval. These peaks included periodicities of 483–490 days, 272 days, 157−162 days, 103−110 days, 64–72 days, 27 days, and 13 days. To investigate the potential influence of space weather parameters on UV radiation, data on cosmic rays, solar radio flux at 10.7 cm (F10.7 cm), the Kp index, and solar wind speed for the sa

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Mukasheva, Saule, Vitaliy Kapytin, and Andrey Malimbaev. "VARIATIONS OF IONOSPHERIC PARAMETERS OVER ALMATY (KAZAKHSTAN) IN 1999–2013." Solar-Terrestrial Physics 5, no. 4 (2019): 91–96. http://dx.doi.org/10.12737/stp-54201912.

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The paper presents the results of a study of the behavior of ionospheric parameters of the total electron content, I(t), and electron density in the maximum F2 layer, Nm, over Almaty (Kazakhstan) [43.25° N; 76.92° E] in 1999–2013. The time interval under study covers different solar activity levels. We have shown that at F10.7>175 in summer and at F10.7>225 in winter there is a saturation effect, i.e. with increasing solar activity level values of I(t) do not increase. The observed nonlinear relationship between the total electron content of the ionosphere and the solar radiation flux F1

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Mukasheva, Saule, Vitaliy Kapytin, and Andrey Malimbaev. "VARIATIONS OF IONOSPHERIC PARAMETERS OVER ALMATY (KAZAKHSTAN) IN 1999–2013." Solnechno-Zemnaya Fizika 5, no. 4 (2019): 110–16. http://dx.doi.org/10.12737/szf-54201912.

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The paper presents the results of a study of the behavior of ionospheric parameters of the total electron content, I(t), and electron density in the maximum F2 layer, Nm, over Almaty (Kazakhstan) [43.25° N; 76.92° E] in 1999–2013. The time interval under study covers different solar activity levels. We have shown that at F10.7>175 in summer and at F10.7>225 in winter there is a saturation effect, i.e. with increasing solar activity level values of I(t) do not increase. The observed nonlinear relationship between the total electron content of the ionosphere and the solar radiation flux F1

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14

Giri, A., A. D. Lama, B. Adhikari, S. Rimal, and S. Khatri. "Analysis of Proton Flux with Solar Wind Parameters, Symmetric (SYM) and Asymmetric (ASY) H-indices." Journal of Nepal Physical Society 8, no. 3 (2022): 53–58. http://dx.doi.org/10.3126/jnphyssoc.v8i3.50727.

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After significant solar eruptions, protons are fired at extremely high speeds, sometimes reaching several thousand kilometer per second (km/s), resulting in solar radiation storms. Solar particle events can be found all around the heliosphere. The cross-correlation analysis along with time series analysis is used to look at how the solar wind and proton flux are related. The parameters used in this work are flux of Solar Energetic Protons (SEP) ranging from >10 MeV to >60 MeV along with speed, density, and pressure of the solar wind parameters. The findings indicate that proton flux (E&g

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15

Liu, Haiting, Jiewen Deng, Yue Guan, and Liwei Wang. "Study of Heat Flux Density of Dish Solar Cavity Heat Absorber." Energies 15, no. 21 (2022): 7946. http://dx.doi.org/10.3390/en15217946.

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The solar cavity heat absorber is the core component of a solar thermal power generation system; its structure and installation position directly affect the efficiency of the heat absorber. To study the influence of these factors on the performance of the heat absorber, in this paper, a numerical simulation of dish solar collector optics is constructed based on the Monte Carlo method, and the distribution characteristics of heat flux density under different heat absorber structures and installation positions are analyzed. The results show that the heat flux density on the inner wall surface of

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16

SAGINOV, L. D. "SIMULATION OF CONCENTRATED SOLAR RADIATION BY INFRARED RADIATION FOR MEASURING THE THERMAL CHARACTERISTICS OF THE THERMAL PHOTOVOLTAIC MODULE OF A SOLAR CONCENTRATOR INSTALLATION." Elektrotekhnologii i elektrooborudovanie v APK 71, no. 1 (2024): 95–100. http://dx.doi.org/10.22314/2658-4859-2024-71-1-95-100.

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When developing renewable energy conversion devices, more and more attention is being paid to improving the efficiency of using renewable energy. The efficiency of modern mass-produced solar photovoltaic modules is about 20 percent. In order to increase the completeness of the use of solar energy, the direction of thermal photovoltaic systems is receiving significant development. Devices of this type realize the task of recycling the remaining 80 percent of energy into heat for its subsequent use. The conversion of concentrated solar energy into photoelectricity and heat is carried out by a th

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17

Prisma, Megantoro, Akbar Syahbani Muhammad, Dani Perkasa Sigit, et al. "Analysis of instrumentation system for photovoltaic pyranometer used to measure solar irradiation level." Bulletin of Electrical Engineering and Informatics 11, no. 6 (2022): 3239~3248. https://doi.org/10.11591/eei.v11i6.4390.

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A pyranometer is a device used to measure the level of solar irradiation. This device has a sensor that measures the density of the electromagnetic flux of solar radiation on a flat plane. The electromagnetic flux density parameter is converted into an electrical parameter in watts per square meter. Pyranometers are used in weather station devices to analyze and predict weather conditions. Solar power generation systems are usually also installed with this device. It is intended to monitor solar irradiation's condition to examine the generating system's performance. This article discus

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18

Gorbunov, A. A., M. I. Ryabov, A. L. Sukharev, and V. V. Bezrukovs. "PERIODIC AND SPORADIC VARIATIONS IN THE SPECTRAL FLUX DENSITY OF THE CAS A SUPERNOVA REMNANT." Radio physics and radio astronomy 25, no. 4 (2020): 268–75. http://dx.doi.org/10.15407/rpra25.04.268.

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Purpose: Based on the long-term study data in all radio spectrum ranges, the nature of deviations of spectral flux density of the Cas A supernova remnant from the tendency of its secular decrease is considered. The aim of this work is determining the presence of quasiperiodic variations and sporadic changes in the Cas A spectral radiation flux density depending on frequency. Design/methodology/approach: The main database is using the published results obtained with the method of absolute measurements of the Cas A spectral radiation flux density in a wide range from millimeter to decimeter wave

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19

Pratiwi, N., and D. Herdiwijaya. "Solar radiation pressure on LAPAN A1 satellite due to extreme geomagnetic storm." Journal of Physics: Conference Series 2243, no. 1 (2022): 012013. http://dx.doi.org/10.1088/1742-6596/2243/1/012013.

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Abstract This study will explain about disturbance potential on the LAPAN A1 satellite caused by solar radiation pressure during an intense geomagnetic storm period. During the storm period, satellite orbital parameter is affected due to the changing of solar radiation pressure, atmospheric chemical composition, and atmospheric density. Therefore, we analyze solar radiation pressure in the period of 11-years to compare the effect at minimum phase, maximum phase, and storm period. One of the most massive geomagnetic storms happened in 2003, so we chose 2003-2013 as the data period. To calculate

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20

Shapoval, Stepan, Nadiia Spodyniuk, Vasyl Zhelykh, Volodymyr Shepitchak, and Pavlo Shapoval. "Application of rooftop solar panels with coolant natural circulation." Pollack Periodica 16, no. 1 (2021): 132–37. http://dx.doi.org/10.1556/606.2020.00218.

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AbstractIn line with the energy development strategy of Europe, it is necessary to implement energy efficient buildings, in which the external enclosures are converters of solar energy to thermal. Therefore, the purpose of the publication was the scientific substantiation and development of the solar heating system with the use of rooftop solar panels. Graphical and analytical dependences of the coefficient of thermal efficiency of the solar panel in heat supply system from the angles of solar radiation incoming and the density of the radiation flux were obtained. Analysis of the results showe

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Megantoro, Prisma, Muhammad Akbar Syahbani, Sigit Dani Perkasa, et al. "Analysis of instrumentation system for photovoltaic pyranometer used to measure solar irradiation level." Bulletin of Electrical Engineering and Informatics 11, no. 6 (2022): 3239–48. http://dx.doi.org/10.11591/eei.v11i6.4390.

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A pyranometer is a device used to measure the level of solar irradiation. This device has a sensor that measures the density of the electromagnetic flux of solar radiation on a flat plane. The electromagnetic flux density parameter is converted into an electrical parameter in watts per square meter. Pyranometers are used in weather station devices to analyze and predict weather conditions. Solar power generation systems are usually also installed with this device. It is intended to monitor solar irradiation's condition to examine the generating system's performance. This article discusses the

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Alpyssova, G. K. "LUMINESCENCE OF CERIUM DOPED YTTRIUM ALUMINUM GARNET CERAMICS SYNTHESIZED IN THE FIELD OF RADIATION FLUX." Eurasian Physical Technical Journal 18, no. 3 (37) (2021): 37–42. http://dx.doi.org/10.31489/2021no3/37-42.

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The paper presents the results of ceramic samples’ dependence of luminescent properties on their position in the crucible during irradiation. For the synthesis, a blend of powders of aluminum oxide, yttrium oxide and cerium oxide was prepared. The ratio of oxides in the charge corresponded to stoichiometric. The particles of the oxide powders had a size of about 1 micron and less. Synthesis was carried out on gas pedal electron accelerator at Institute of Nuclear Physics SB RAS (Novosibirsk). Luminescent properties were measured on spectrofluorimeter SM 2203 "SOLAR" under excitation by monochr

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23

Pereira, A. B., N. A. Villa Nova, and E. Galvani. "Estimation of Global Solar Radiation Flux Density in Brazil from a Single Measurement at Solar Noon." Biosystems Engineering 86, no. 1 (2003): 27–34. http://dx.doi.org/10.1016/s1537-5110(03)00081-3.

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Thuillier, G., and S. Bruinsma. "The Mg II index for upper atmosphere modelling." Annales Geophysicae 19, no. 2 (2001): 219–28. http://dx.doi.org/10.5194/angeo-19-219-2001.

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Abstract. The solar radio flux at 10.7 cm has been used in upper atmosphere density modelling because of its correlation with EUV radiation and its long and complete observational record. A proxy, the Mg II index, for the solar chromospheric activity has been derived by Heath and Schlesinger (1986) from Nimbus-7 data. This index allows one to describe the changes occurring in solar-activity in the UV Sun spectral irradiance. The use of this new proxy in upper atmosphere density modelling will be considered. First, this is supported by the 99.9% correlation between the solar radio flux (F10.7)

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McMahon, M. J., J. W. Kelly, and D. R. Decoteau. "Spectral Transmittance of Selected Greenhouse Construction and Nursery Shading Material." Journal of Environmental Horticulture 8, no. 3 (1990): 118–21. http://dx.doi.org/10.24266/0738-2898-8.3.118.

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Abstract Spectral transmittance properties of several greenhouse construction and shading materials were determined by measuring the quantity and quality of solar radiation transmission on non-clouded (sunny) days at solar noon. Spectral transmittance parameters included photosynthetic radiation (400–700 nm) and photomorphogenic radiation (660 nm (red light), 730 nm (far-red light), and 400–500 nm (blue light). Light available for photosynthesis was measured as photosynthetic photon flux density (PPFD) and photosynthetic radiation (PI). Photomorphogenic radiation was measured as far-red/red (F

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Trubakova, Karine, Svetlana Turko, and Marina Vlasenko. "The influence of solar activity on the formation of plant phytomass in dry steppe conditions." E3S Web of Conferences 285 (2021): 06001. http://dx.doi.org/10.1051/e3sconf/202128506001.

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The main mechanism for the formation of yield is the process of transpiration, the driving force of which is the radiation balance and photosynthetically active radiation (PAR). The larger the area of the plant surface that receives the luminous flux of solar energy, the more active the action of the photosynthetic process. The formation of organic matter depends on the formed aboveground phytomass of plants. The aim of the study is to find the optimal ratio between the emitted flux of solar energy and the area of the assimilation apparatus for further determining the phytoproductivity of plan

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Shi, Y., E. Zesta, and L. R. Lyons. "Features of energetic particle radial profiles inferred from geosynchronous responses to solar wind dynamic pressure enhancements." Annales Geophysicae 27, no. 2 (2009): 851–59. http://dx.doi.org/10.5194/angeo-27-851-2009.

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Abstract. Determination of the radial profile of phase space density of relativistic electrons at constant adiabatic invariants is crucial for identifying the source for them within the outer radiation belt. The commonly used method is to convert flux observed at fixed energy to phase space density at constant first, second and third adiabatic invariants, which requires an empirical global magnetic field model and thus might produce some uncertainties in the final results. From a different perspective, in this paper we indirectly infer the shape of the radial profile of phase space density of

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Xiang, Zheng, Binbin Ni, Chen Zhou, et al. "Multi-satellite simultaneous observations of magnetopause and atmospheric losses of radiation belt electrons during an intense solar wind dynamic pressure pulse." Annales Geophysicae 34, no. 5 (2016): 493–509. http://dx.doi.org/10.5194/angeo-34-493-2016.

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<p><strong>Abstract.</strong> Radiation belt electron flux dropouts are a kind of drastic variation in the Earth's magnetosphere, understanding of which is of both scientific and societal importance. Using electron flux data from a group of 14 satellites, we report multi-satellite simultaneous observations of magnetopause and atmospheric losses of radiation belt electrons during an event of intense solar wind dynamic pressure pulse. When the pulse occurred, magnetopause and atmospheric loss could take effect concurrently contributing to the electron flux dropout. Losses throu

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García-Rodríguez, Ana, Sol García-Rodríguez, Montserrat Díez-Mediavilla, and Cristina Alonso-Tristán. "Photosynthetic Active Radiation, Solar Irradiance and the CIE Standard Sky Classification." Applied Sciences 10, no. 22 (2020): 8007. http://dx.doi.org/10.3390/app10228007.

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Plant growth is directly related to levels of photosynthetic photon flux density, Qp. The improvement of plant-growth models therefore requires accurate estimations of the Qp parameter that is often indirectly calculated on the basis of its relationship with solar irradiation, RS, due to the scarcity of ground measurements of photosynthetic photon flux density. In this experimental campaign in Burgos, Spain, between April 2019 and January 2020, an average value of the Qp/Rs ratio is determined on the basis of measurements at ten-minute intervals. The most influential factor in the Qp/Rs ratio,

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Zelinskiy, A. S., та G. A. Yakovlev. "Зависимость компоненты космического луча на фоне поверхности атмосферы от солнечной магнитной активности". Вестник КРАУНЦ. Физико-математические науки, № 1 (24 квітня 2021): 114–21. http://dx.doi.org/10.26117/2079-6641-2021-34-1-114-121.

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Using Geant4 toolkit the changes of the flux density and of the dose rates of the secondary cosmic radiation at the heights up to 50 m from the land surface (at a depth of atmosphere about 1030 g/cm²) and depending on solar magnetic activity were estimated. For changes of Wolf’s number (sunspots) in the range of 0 — 200 the flux density of reflected from air and the soil g- and b- particles changes from 5.7 to 7 and 0.10 – 0.13 m-²s-¹ respectively, for energy from 0 keV to several units of GeV in the ground atmosphere on one meter from the earth. These estimates are much lower than those estim

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Li, Tao, Lingtian Xie, Boyang Zhao, Wenran Shen, and Yun Liu. "Analysis on the Effects of Different Receiver Structures and Porous Parameters on the Volumetric Effects and Heat Transfer Performance of Porous Volumetric Solar Receiver." International Journal of Energy Research 2023 (February 7, 2023): 1–13. http://dx.doi.org/10.1155/2023/3289428.

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The volumetric solar receiver is an important heat transfer component of the concentrated solar power (CSP) system. Moreover, in order to improve the absorption of concentrated solar radiation, the porous media are widely used in volumetric solar receiver. In recent years, many studies were concerned with the effects of porosity, pore number density and size, Reynolds number, and Darcy number on heat and flow performance in volumetric solar receiver. However, there are few studies on the effects of structure type and geometric parameters on the volumetric effects and the radiation characterist

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Ono, Nobuo, and Maxim S. Krass. "Theoretical approach describing the thermal regime of snow-covered sea ice." Annals of Glaciology 18 (1993): 79–84. http://dx.doi.org/10.3189/s0260305500011290.

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As the greater part of sea-ice area is covered with snow, the thermal regime of sea ice is characterized by the thermal behavior of snow-covered sea ice. In this paper the thermal regime of snow-covered sea ice is quantitatively investigated with a one-dimensional non-linear boundary model which contains: compaction of snow cover; internal absorption of solar radiation; evaporation–condensation within snow cover; equilibrium phase change of brine within sea ice; and vertical oceanic heat flux from seawater to ice. Penetration of air temperature oscillations into the snow-covered sea ice increa

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Ono, Nobuo, and Maxim S. Krass. "Theoretical approach describing the thermal regime of snow-covered sea ice." Annals of Glaciology 18 (1993): 79–84. http://dx.doi.org/10.1017/s0260305500011290.

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As the greater part of sea-ice area is covered with snow, the thermal regime of sea ice is characterized by the thermal behavior of snow-covered sea ice. In this paper the thermal regime of snow-covered sea ice is quantitatively investigated with a one-dimensional non-linear boundary model which contains: compaction of snow cover; internal absorption of solar radiation; evaporation–condensation within snow cover; equilibrium phase change of brine within sea ice; and vertical oceanic heat flux from seawater to ice. Penetration of air temperature oscillations into the snow-covered sea ice increa

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Lodhi, M. A. K., Abel B. Diaz, and Thomas L. Wilson. "Simplified solar modulation model of inner trapped belt proton flux as a function of atmospheric density." Radiation Measurements 39, no. 4 (2005): 391–99. http://dx.doi.org/10.1016/j.radmeas.2004.10.005.

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Cisneros-Cárdenas, Nidia Aracely, Rafael Cabanillas-López, Ricardo Pérez-Enciso, et al. "Study of the Radiation Flux Distribution in a Parabolic Dish Concentrator." Energies 14, no. 21 (2021): 7053. http://dx.doi.org/10.3390/en14217053.

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The radiation flux distributions produced by the concentrating solar systems used to produce thermal/electrical power are usually non-homogeneous. This results in non-uniform temperature distributions on the solar receivers, causing adverse effects on the system’s overall performance. An approach to better understand the problem is to study the surfaces around the focal zone where the radiation density is homogeneous (isosurfaces), generating them from experimental data. For this, it is necessary to superimpose built volumes of the different irradiance levels using parallel planes in different

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Tříska, P., A. Czapek, J. Chum, et al. "Space weather effects on the MAGION-4 and MAGION-5 solar cells." Annales Geophysicae 23, no. 9 (2005): 3111–13. http://dx.doi.org/10.5194/angeo-23-3111-2005.

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Abstract. Data on solar array efficiency measured on board two Czech MAGION micro-satellites between August 1995 and June 2002, during the period of increasing and high solar activity, were used to study the space weather effects on photo-voltaic solar cells. A stronger degradation of the solar array was observed on MAGION-5 in comparison with MAGION-4. This fact can be explained by the essential difference between the two orbits. The MAGION-5 s/c was in the radiation belts more than 40% of the time, whereas the MAGION-4 was only present about 4% of the time. The experimental data refer to per

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Harrison, R. Giles. "Discrimination between cosmic ray and solar irradiance effects on clouds, and evidence for geophysical modulation of cloud thickness." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 464, no. 2098 (2008): 2575–90. http://dx.doi.org/10.1098/rspa.2008.0081.

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Solar activity and galactic cosmic rays (CRs) are closely inversely correlated. In studies of cloud changes associated with solar changes, the close solar activity–CR relationship can cause ambiguity in attributing the cloud changes to one factor or the other. A method for discriminating between cloud effects from these causes is described, using the 1.68 yr periodicity present in surface-based measurements of CRs but absent in radio flux measurements of solar activity. The periodicity is present in CRs and other heliospheric parameters during, at least, solar cycle 21. Daily surface radiation

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Szyszka, Jerzy. "Experimental Evaluation of the Heat Balance of an Interactive Glass Wall in A Heating Season." Energies 13, no. 3 (2020): 632. http://dx.doi.org/10.3390/en13030632.

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The paper presents an evaluation of the energy efficiency of an interactive glass wall (IGW) prototype. It is a design analogous to Trombe wall. It is capable of giving out the solar radiation heat gains after the sunset. It responds interactively to solar exposure and temperature conditions, regulating the thermal resistance adequately to the requirements. The evaluation of the efficiency of the IGW was based on the analysis of density of heat flux measured on the inner surface of the wall. The experiments were conducted in field conditions using a test chamber of regulated air temperature. T

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Reddmann, Th, та R. Uhl. "The H Lyman-α actinic flux in the middle atmosphere". Atmospheric Chemistry and Physics Discussions 2, № 5 (2002): 1635–54. http://dx.doi.org/10.5194/acpd-2-1635-2002.

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Abstract. The penetration of solar H Lyman-a radiation into the terrestrial middle atmosphere is studied in detail. The Lyman-a actinic flux is calculated with a Monte Carlo approach including multiple resonance scattering of Lyman-a photons within the terrestrial atmosphere and a temperature dependent absorption cross section of molecular oxygen. The dependence of the actinic flux on the temperature profile is significant for O2 column densities greater than about 1024 m-2. For column densities greater than about 5 · 1024 m-2 resonance scattering becomes important at solar zenith angles >

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Reddmann, T., and R. Uhl. "The H Lyman-<font face="Symbol"><b>a</b></font> actinic flux in the middle atmosphere." Atmospheric Chemistry and Physics 3, no. 1 (2003): 225–31. http://dx.doi.org/10.5194/acp-3-225-2003.

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Abstract. The penetration of solar H Lyman-a radiation into the terrestrial middle atmosphere is studied in detail. The Lyman-a actinic flux is calculated with a Monte Carlo approach including multiple resonance scattering of Lyman-a photons within the terrestrial atmosphere and a temperature dependent absorption cross section of molecular oxygen. The dependence of the actinic flux on the temperature profile is significant for O2 column densities greater than about 1024 m-2. For column densities greater than about 5 · 1024 m-2 resonance scattering becomes important at solar zenith angles >

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Gerland, S., G. E. Liston, J. G. winther, J. B. Ørbæk, and B. V. Ivanov. "Attenuation of solar radiation in Arctic snow: field observations and modelling." Annals of Glaciology 31 (2000): 364–68. http://dx.doi.org/10.3189/172756400781820444.

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AbstractSolar radiation was measured above and in the snowpack on Svalbard using a spectroradiometer and a quantum meter measuring average photosynthetically active radiation (PAR). In order to specify the effect of melting on the snow’s radiation properties, all measurements were performed before and during the melt season in May and June 1997 and 1998. Along with the radiation measurements, physical and structural snow properties were logged in snow pits. A physically based model was used to simulate the penetration of radiation into the snow The model formulation accounts for the spectrally

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Al-Tahaineh, Hamza A. "Performance analysis of salinity solar pond: design evaluation and dimensional analysis." International Journal of Low-Carbon Technologies 20 (2025): 217–22. https://doi.org/10.1093/ijlct/ctae291.

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Abstract The overall impacts of the solar pond’s surface area, heat flux from solar radiation, effective water–salt thermal conductivity, depth, water density, water-specific heat, and transient time on its performance was investigated by a dimensional analysis of the solar pond. These variables were combined into a four-dimensional, recognized group using the Π-theorem. The results of dimensional analysis were applied to the pond that was being studied, and two additional ponds of different sizes were then contrasted. For the solar pond, temperature profiles and performance curves were displa

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Levin, B. N., V. M. Fridman, and O. A. Sheiner. "Efficiency for Electron Acceleration in Solar Energy Release Region as Estimated in the Context of Plasma Mechanism of Radio Emission." International Astronomical Union Colloquium 142 (1994): 713–17. http://dx.doi.org/10.1017/s0252921100078015.

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AbstractThe paper is devoted to the interpretation of spectrographic data within the frequency range 8-12 GHz. Some spectral characteristics of weak solar steplike radio bursts are reported. To explain some parameters of the emission the ability to keep superthermal electrons in a magnetic trap with dense inhomogeneous plasma is theoretically studied. On the basis of this model we estimate the energy and number of accelerated electrons, and the flux density of precipitating electrons which are the source of enhanced plasma radiation. For the obtained efficiency of electron acceleration the cal

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Steganov, G. B., A. M. Beznyakov, and A. V. Nemirov. "Influence of space vehicle remote power supply on thermal regimes of solar batteries." VESTNIK of Samara University. Aerospace and Mechanical Engineering 21, no. 1 (2022): 14–23. http://dx.doi.org/10.18287/2541-7533-2022-21-1-14-23.

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The issues of ensuring the functioning of an additional energy-receiving channel for the onboard power supply system of a low-orbit spacecraft are considered. To compensate for the shortage of electricity on board the spacecraft, various options for remote power supply from the system of space power stations transmitting energy to the solar battery by laser radiation during periods of its forced inactivity are possible. Long shadow-sunlight periods of time are a distinctive feature of functioning of low-orbit spacecraft. During these periods the solar battery is idle, and, in addition, even in

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Yadav, Kunvar Shardaprasad, Rakesh Bhikhabhai Vadnathani, Keyurgiri Rajendragiri Goswami, and Priyanka Mahesh Patel. "Anomalous Variations in Ionosphere TEC Before the Earthquakes of 2021 in the Different Parts of the Globe." Trends in Sciences 20, no. 8 (2023): 5169. http://dx.doi.org/10.48048/tis.2023.5169.

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The present article shows the satellite-based TEC data analysis for 6 earthquakes (M ≥ 6.0) from specific parts of the earth that occurred in 2021 during the low solar radiation period. In search of pre-earthquake signatures in the ionosphere, the study of the data of GPS-based TEC before the earthquake is needed. L1 and L2 frequency delays have shown STEC and VTEC formulations for Ionosphere electron density measurements. The TEC data shows unusual behavior from 1 to 30 days before an earthquake. The primary goal of this article is to investigate and establish the correlation of lithosphere a

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Akulova, O. B., V. I. Bukaty, A. A. Vagner, A. V. Dyachenko, A. A. Kolomeytsev, and A. T. Zinoviev. "Photosynthetic Active Solar Radiation in Lake Teletskoye During the Open Water Period." Izvestiya of Altai State University, no. 4(126) (September 9, 2022): 11–17. http://dx.doi.org/10.14258/izvasu(2022)4-01.

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Spatial and temporal variability of flux density of photosynthetic active solar radiation (PAR) in the waters of large deep-water oligotrophic Lake Teletskoye (Republic of Altai) is considered based on the analyzed experimental data for the years 2016-2021. Probing of the lake water column was implemented using Satlanic PAR sensor as a part of CTD of the SBE 25plus probe at the beginning and the end of the summer heating period. During various years of studying, PAR magnitude monotonically decreased with lake depth increase and practically became zero at horizons from 3 to 14,8 m according to

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Jie, Gao. "A Process-Based Energy Balance Snowmelt Model II: Application." Advanced Materials Research 726-731 (August 2013): 3346–52. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.3346.

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Based on the process-based energy balance snow melting model Snow Column Model, several scenarios are set to study the response of snow pack to climate change according to site-based data in snowpit 006, Niwot Ridge, Colorado, Front Range of Rocky Mountains. Based on an introduction and validation of Snow Column Model by data of 1996, a further validation is made on data during 1997 and 1999. Scenarios are set based on observations of solar radiation, long-wave radiation, air temperature, latent and sensible heat flux during 1996 and 1999. The responses of snow pack to an average temperature f

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Nikolaeva, Vera, Evgeniy Gordeev, Denis Rogov, and Aleksandr Nikolaev. "AIM-E auroral ionosphere model adjustment for the regular E layer." Solar-Terrestrial Physics 7, no. 1 (2021): 41–46. http://dx.doi.org/10.12737/stp-71202106.

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The E-Region Auroral Ionosphere Model (AIM-E) was developed to determine the chemical composition and electron density in the auroral zone at E-layer heights (90–150 km). Solar and magnetic activity input parameters for AIM-E are the three-hour Ap index and the daily solar radio flux at a wavelength of 10.7 cm (index F10.7). In this paper, we compare AIM-E calculations of the electron density for the daytime with EUV radiation spectrum specified in two different ways: 1) the EUV spectrum theoretically calculated using the F10.7 index as an input parameter; 2) using TIMED satellite direct measu

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Nikolaeva, Vera, Evgeniy Gordeev, Denis Rogov, and Aleksandr Nikolaev. "AIM-E auroral ionosphere model adjustment for the regular E layer." Solnechno-Zemnaya Fizika 7, no. 1 (2021): 51–58. http://dx.doi.org/10.12737/szf-71202106.

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The E-Region Auroral Ionosphere Model (AIM-E) was developed to determine the chemical composition and electron density in the auroral zone at E-layer heights (90–150 km). Solar and magnetic activity input parameters for AIM-E are the three-hour Ap index and the daily solar radio flux at a wavelength of 10.7 cm (index F10.7). In this paper, we compare AIM-E calculations of the electron density for the daytime with EUV radiation spectrum specified in two different ways: 1) the EUV spectrum theoretically calculated using the F10.7 index as an input parameter; 2) using TIMED satellite direct measu

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Sadenova, Marzhan, Sergey Khrapov, and Nail Beysekenov. "Mathematical Modeling of Crop Yield Forecast Based on Field Monitoring and Remote Sensing Data." Mathematical Physics and Computer Simulation, no. 3 (October 2023): 56–75. http://dx.doi.org/10.15688/mpcm.jvolsu.2023.3.5.

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A mathematical model for forecasting crop yields based on field monitoring data and remote sensing of the Earth has been constructed. The model includes the following main values: vegetation indices NDVI, total solar radiation flux at the lower boundary of the atmosphere, efficiency of using photosynthetically active solar radiation, biomass respiration costs. After the parameterization of the mathematical model using observational data, the number of uncertain (calibration) coefficients of the model decreases from 8 to 2. These coefficients are determined by the method of successive approxima

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