The Use of Solar Radiation Models to Derive Atmospheric Turbidity from Measured Irradiance: An Inter-Comparison Study

2019 ◽  
Author(s):  
Omar Behar ◽  
Daniel Sbarbaro ◽  
Luis Moran ◽  
Aitor Marzo ◽  
Mauricio Trigo ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Comparison Study ◽  
Atmospheric Turbidity

scholarly journals Direct Solar Radiation and Atmospheric Turbidity in Mikołajki in the Years 1971–1980 and 1991–2000

2009 ◽  
Vol 2 (1) ◽  
pp. 19-33
Author(s):  
Joanna Uscka-Kowalkowska
Keyword(s):  
Solar Radiation ◽  
Solar Irradiance ◽  
Direct Solar Radiation ◽  
Spectral Structure ◽  
Solar Constant ◽  
Air Masses ◽  
Atmospheric Turbidity ◽  
The Earth

Abstract The present study deals with the changing amount of incoming direct solar radiation and the optical state of the atmosphere in Mikołajki in the years 1971-1980 and 1991-2000. The highest level of solar irradiance in these two decades occurred on 23rd June 1977 and amounted to 1043.9 W·m-2. Compared to the first decade analysed, the percentage of the solar constant reaching the Earth in the second decade was higher. The spectral structure of the radiation also changed - the share of the shortest waves (λ<525 nm) increased, whereas the amount of waves with a wavelength of 710 nm or more decreased. In both study periods the annual course of solar extinction (expressed in terms of Linke’s turbidity factor) turned out to have been typical, with the highest values in summer and the lowest in winter. In the years 1991-2000, in all seasons, a lower atmospheric turbidity was observed in comparison with the years 1971-1980. The atmospheric turbidity was also analysed with relation to the air masses. In both decades in question the lowest turbidity occurred in arctic air masses and the highest in tropical air masses. An improved optical state of the atmosphere was observed in all considered air masses, though the biggest decrease in turbidity was found in polar air masses, particularly in the polar maritime old air (TLAM2 dropped by 0.75) and polar continental air (by 0.70).

Variability of aerosol extinction of solar radiation in Antarctica

1994 ◽  
Vol 6 (3) ◽  
pp. 419-424 ◽  
Author(s):  
V. F. Radionov
Keyword(s):  
Solar Radiation ◽  
Volcanic Activity ◽  
Considerable Increase ◽  
Temporal Variations ◽  
Stratospheric Aerosol ◽  
Aerosol Extinction ◽  
Mount Pinatubo ◽  
Atmospheric Turbidity ◽  
Aerosol Pollution ◽  
Using Data

Temporal variations of the aerosol optical depth and transmission coefficient of the atmosphere are considered using data from Mirny Observatory, Antarctica. Year-to-year variability of these parameters is determined mainly by stratospheric aerosol pollution due to volcanic activity. A considerable increase of atmospheric turbidity has been observed since the end of September 1991. This phenomenon seems to be associated with the Mount Pinatubo volcanic eruption.

scholarly journals 1961–1990 monthly high-resolution solar radiation climatologies for Italy

2012 ◽  
Vol 8 (1) ◽  
pp. 19-25 ◽  
Author(s):  
J. Spinoni ◽  
M. Brunetti ◽  
M. Maugeri ◽  
C. Simolo
Keyword(s):  
High Resolution ◽  
Solar Radiation ◽  
Normal Values ◽  
Sunshine Duration ◽  
Global Radiation ◽  
Data Set ◽  
Sparse Network ◽  
Duration Data ◽  
Atmospheric Turbidity ◽  
Preliminary Version

Abstract. We present a methodology for estimating solar radiation climatologies from a sparse network of global radiation and/or sunshine duration records: it allows to obtain high-resolution grids of monthly normal values for global radiation (and for the direct and diffuse components), atmospheric turbidity, and surface absorbed radiation. We discuss the application of the methodology to a preliminary version of an Italian global radiation and sunshine duration data set, which completion is still in progress and present the resulting 1961–1990 monthly radiation climatologies.

scholarly journals Thermal performance comparison of recycled and clay roof tiles due heat radiation by digital holographic interferometry

2019 ◽  
Vol 65 (6 Nov-Dec) ◽  
pp. 678
Author(s):  
A. Sanchez-Alvarez ◽  
M.H. De la Torre Ibarra ◽  
F. Mendoza Santoyo
Keyword(s):  
Solar Radiation ◽  
Surface Deformation ◽  
Performance Comparison ◽  
Heat Radiation ◽  
Waste Materials ◽  
Comparison Study ◽  
Recycling Process ◽  
Roof Tile ◽  
Out Of Plane ◽  
Better Than

It is through the recycling process that disposed waste materials could regain a new purpose on their use, take for instance the tetrapak™ packaging. This material consists of thermally joint layers of paper, aluminum and polyethylene. Once recycled, the two latter materials form a new composite named poly-aluminum which is employed to manufacture roof tiles that serve as environmental protection against solar radiation and rain. This work reports an optical nondestructive comparison study of the surface deformation in poly-aluminum and clay roof tiles exposed to heat radiation. The optical system based on a sensitive out-of-plane interferometer configuration records several image holograms from a controlled heat source that raises the temperature on the tile’s surface. The retrieved optical phase renders the tiles surface’s deformation for a temperature range of 25 degrees on a Celsius scale. The results show a greater deformation profile from the poly-aluminum tile compared with the classic clay tile. However, its thermal insulation properties are better than those of the clay roof tile.

scholarly journals Comparative Study of Experimentally Measured and Calculated Solar Radiations for Two Sites in Algeria

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7441
Author(s):  
Bouazza Fekkak ◽  
Mustapha Merzouk ◽  
Abdallah Kouzou ◽  
Ralph Kennel ◽  
Mohamed Abdelrahem ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Comparative Study ◽  
Theoretical Models ◽  
Relative Difference ◽  
Solar Irradiation ◽  
Comparison Study ◽  
Global Solar Irradiation ◽  
Proposed Model ◽  
Different Seasons

This paper presents a comparison study between the measured solar radiations on site and the calculated solar radiation based on the most theoretical models presented in the literature up to date. Indeed, for such purposes, this paper focusses on the analysis of the data of the measured solar radiation collected on two sites in Algeria such as Tlemcen (34°52′58″ N 01°19′00″ W, elevation 842 m) and Senia (35°39′ N 0°38′ W, elevation: 77 m). In order to check the accuracy of the proposed model, the experimental collected data of the solar radiation obtained from the existing radiometric stations installed at the two locations under investigation, are compared with the estimated or predicted solar radiations obtained from the Capderou and R.Sun models, where four days under clear skies are selected from different seasons to achieve this comparison. Second, the daily averages of the experimental global solar irradiation are compared to those predicted by Mefti model for both the sites. Finally, a validation is carried out based on the obtained experimental monthly global irradiations and with those estimated by Coppolino and Sivkov models. A relative difference is used in this case to judge the reliability and the accuracy of each model for both sites.

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