scholarly journals Rate of solar insolation change and the glacial/interglacial transition

2006 ◽  
Vol 33 (4) ◽  
Author(s):  
Junfeng Ji ◽  
William Balsam ◽  
Xing Chen ◽  
Jun Chen ◽  
Yang Chen ◽  
...  
Keyword(s):  
Solar Insolation ◽  
Insolation Change

DENDROCHRONOLOGICAL RESEARCHES IN ARTIFICIAL PLANTINGS OF NUR-SULTAN CITY

2020 ◽  
Author(s):  
A N. Kabanov ◽  
◽  
S.A. Kabanova ◽  
Keyword(s):  
Pinus Sylvestris ◽  
Radial Growth ◽  
Climatic Conditions ◽  
Solar Insolation ◽  
Dendrochronological Analysis ◽  
Different Ages ◽  
Green Zone

Dendrochronological analysis was carried out in forest cultures of Pinus sylvestris of different ages growing in the green zone of Nur-Sultan city. It was found that the value of the annual radial growth is subject to a cycle with a period of 10-11 years. This is due to climatic conditions, in particular, with periods of solar insolation, which is confirmed by researches of other authors.

scholarly journals Global Solar Insolation Estimation and Investigation: A Case Study of Various Nations and Cities

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Kuldeep Jayaswal ◽  
G. S. Sharma ◽  
M. S. Bhaskar ◽  
Dhafer Almakhles ◽  
Umashankar Subramaniam ◽  
...  
Keyword(s):  
Solar Insolation

Comparing Measured and Satellite-Derived Surface Irradiance

2012 ◽  
Author(s):  
Aron Habte ◽  
Manajit Sengupta ◽  
Stephen Wilcox
Keyword(s):  
Power Plants ◽  
Power Production ◽  
The United States ◽  
Measured Data ◽  
Surface Radiation ◽  
Surface Measurement ◽  
Solar Insolation ◽  
Clear Sky ◽  
Temporal And Spatial ◽  
Microclimate Conditions

The purpose of this study is two-fold: 1) To examine the performance of the Global Solar Insolation Project (GSIP) physics-based model in characterizing global horizontal solar radiation across the United States by comparing to the ground measured data, and 2) to examine improvements of the GSIP data to address temporal and spatial variations. The study enumerates and examines the spatial and temporal limitations of the GSIP model. Most comparisons demonstrate relatively good statistical agreement. However, the methodology used in the satellite model to distinguish microclimate conditions presents significant challenges, and the model requires refinement in addressing aerosol estimates, water vapor estimates, and clear sky optical properties. Satellite derived datasets are only available at half-hour intervals. Surface measurement can easily be made at temporal resolution in the order of seconds. Therefore intra-hour variability, an important quantity for understanding how power production in power plants will vary, cannot be directly derived from satellites. This paper illustrates how intra-hour variability in ground measurements cannot be captured by the satellite based datasets. We also discuss the potential for improved next-generation geostationary satellite data to improve the accuracy of surface radiation estimates.

scholarly journals Presence of Pathogens and Indicator Microbes at a Non-Point Source Subtropical Recreational Marine Beach

2009 ◽  
Vol 76 (3) ◽  
pp. 724-732 ◽  
Author(s):  
Amir M. Abdelzaher ◽  
Mary E. Wright ◽  
Cristina Ortega ◽  
Helena M. Solo-Gabriele ◽  
Gary Miller ◽  
...  
Keyword(s):  
Point Source ◽  
High Tide ◽  
South Florida ◽  
Point Sources ◽  
Fecal Coliforms ◽  
Health Concern ◽  
Ocean Water ◽  
Solar Insolation ◽  
Sources Of Pollution ◽  
Water Detection

ABSTRACT Swimming in ocean water, including ocean water at beaches not impacted by known point sources of pollution, is an increasing health concern. This study was an initial evaluation of the presence of indicator microbes and pathogens and the association among the indicator microbes, pathogens, and environmental conditions at a subtropical, recreational marine beach in south Florida impacted by non-point sources of pollution. Twelve water and eight sand samples were collected during four sampling events at high or low tide under elevated or reduced solar insolation conditions. The analyses performed included analyses of fecal indicator bacteria (FIB) (fecal coliforms, Escherichia coli, enterococci, and Clostridium perfringens), human-associated microbial source tracking (MST) markers (human polyomaviruses [HPyVs] and Enterococcus faecium esp gene), and pathogens (Vibrio vulnificus, Staphylococcus aureus, enterovirus, norovirus, hepatitis A virus, Cryptosporidium spp., and Giardia spp.). The enterococcus concentrations in water and sand determined by quantitative PCR were greater than the concentrations determined by membrane filtration measurement. The FIB concentrations in water were below the recreational water quality standards for three of the four sampling events, when pathogens and MST markers were also generally undetectable. The FIB levels exceeded regulatory guidelines during one event, and this was accompanied by detection of HPyVs and pathogens, including detection of the autochthonous bacterium V. vulnificus in sand and water, detection of the allochthonous protozoans Giardia spp. in water, and detection of Cryptosporidium spp. in sand samples. The elevated microbial levels were detected at high tide and under low-solar-insolation conditions. Additional sampling should be conducted to further explore the relationships between tidal and solar insolation conditions and between indicator microbes and pathogens in subtropical recreational marine waters impacted by non-point source pollution.

scholarly journals SOLAR INSOLATION CALCULATION PROGRAM IN MATLAB / SIMULINK ENVIRONMENT

2022 ◽  
Vol 1 (15) ◽  
pp. 66-70
Author(s):  
Yuriy Konovalov ◽  
Aleksey Haziev
Keyword(s):  
Weather Factors ◽  
Solar Insolation ◽  
Matlab Simulink ◽  
Mathematical Calculation

The article describes the mathematical calculation of the inflow of solar insolation, the device and operation of the insolation calculation program, graphs showing the change in radiation from the influence of weather factors, the location of the installation of solar receivers are ob-tained

scholarly journals A study of improving thermal environment of external louver through establishment of test bed

2018 ◽  
Vol 7 (3.3) ◽  
pp. 373
Author(s):  
Sun Pil Kwon ◽  
Jae Jun Jung ◽  
Byoung Jo Jung
Keyword(s):  
Statistical Analysis ◽  
Solar Radiation ◽  
Thermal Effect ◽  
Thermal Load ◽  
Thermal Environment ◽  
Direct Solar Radiation ◽  
Maximum Temperature ◽  
Test Bed ◽  
Solar Insolation ◽  
Maximum Temperature Difference

Background/Objectives: To improve a thermal load by increasing internal thermal effect of a building from direct solar radiation through an increase of glass windows.Methods/Statistical analysis: Through the establishment of test beds of the same size, the data of temperature, humidity, solar insolation and PMV of each test bed with or without external louver are acquired to analyze thermal environmental with the simulation.Findings: For the analysis of thermal environment, the amount of energy consumption has been analyzed through the simulation and the data of temperature, humidity, solar insolation and PMV have been acquired for the analysis. With the simulation, about 20% energy saving has been confirmed and the daily averages of temperature and humidity between 8AM to 7PM have been calculated to calculate the maximum temperature difference to be 9.4℃. The solar insolation between 9AM and 7PM was 300W/m2 or below.Improvements/Applications: The improvement of thermal effect with an external louver has been confirmed. It may be applied to the louver system to improve building thermal environment, awning to control direct solar radiation, blind to improve uniformity of illumination intensity toward building during daytime, external blind and ceiling louver system. 

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