Measurement of direct solar radiation in China
Improvement of ERA5 over ERA-Interim in Simulating Surface …
Abstract Surface incident solar radiation (Rs) is important for providing essential information on climate change. Existing studies have shown that the Rs values from current reanalyses are significantly overestimated throughout China. The European Centre for Medium-Range Weather Forecasts (ECMWF) recently released the fifth …
Hourly 5-km surface total and diffuse solar radiation in China, …
We generated a 12-year (2007–2018) hourly dataset from Multi-functional Transport Satellite (MTSAT) satellite observations, including surface total solar radiation …
Evaluating direct and diffuse solar radiation components through …
The article introduces a method to measure direct and diffuse solar radiation. ... Measurement and estimation of photosynthetically active radiation from 1961 to 2011 in Central China. Appl Energy (2013) Y.B. Lu et al. Assessment of the high-resolution estimations of global and diffuse solar radiation using WRF-Solar.
Estimation of daily and monthly diffuse radiation from measurements of ...
1. Introduction. Global solar radiation (R s) at the Earth''s surface is the primary source of energy for life on our planet [65] and can be harnessed for solar energy applications as a sustainable, safe and abundant energy resource [9]; [11]; [28]; [33]; [45].The R s is composed of direct radiation and diffuse radiation (R d).Both R s and R …
Country-level evaluation of solar radiation data sets using ground ...
Based on one year of measurements from 98 stations in China, Hou et al. concluded that ERA5 overestimated the hourly global and direct radiation by …
Solar Radiation Measurements
Changes with Time: Inter-annual MONTHLY MEAN DAILY TOTALS Solar Radiation Research Laboratory 1986-2000 Global Trend y = 4.3303x - 4215.9 R2 = 0.0034 Direct Trend y = 16.103x - 26829
Data Quality Assessment and the Long-Term Trend of Ground Solar ...
Routine measurements of irradiance are valuable for climate change research because of long time series and areal coverage. In this study, a set of quality assessment (QA) algorithms is used to test the quality of daily solar global, direct, and diffuse radiation measurements taken at 122 observatories in China during 1957–2000.
Advances in sunphotometer-measured aerosol optical properties …
Qiu et al., 1985 used a modified astronomical telescope to measure direct solar radiation and forward scattering intensity of the aureole sky, ... warming the atmosphere but cooling the climate system was supported by many researches based on CE-318 sunphotometer measurements in East China (Table 1).
Photosynthetically active radiation and its relationship with global ...
Photosynthetically active radiation (PAR) and other solar components were observed for a period of 3 years at Wuhan, China to determine for the first time the temporal variability of PAR fraction [PAR/G (G here stands for global solar radiation)] and its dependence on different sky conditions in Central China. PAR, G and PAR/G showed …
Estimating daily global solar radiation by day of year in China
1.. IntroductionSolar energy is one of the most important and promising renewable and sustainable energy. China has abundant solar energy resources and more than two-thirds of areas receive an annual total solar radiation that exceeds 5.9 GJ/m 2 with sunshine duration more than 2200 h [1] is meaningful to substitute solar energy for …
Variability in Direct and Diffuse Solar Radiation Across China …
Long‐term variability of direct and diffuse solar radiation (Rdir and Rdif) is essential for climate change study. However, Rdir and Rdif observations suffer from low spatiotemporal coverage and inhomogeneity. This study improved hybrid models to calculate Rdir and Rdif from sunshine duration and meteorological data at ~2,000 stations from …
A Revisit of Direct and Diffuse Solar Radiation in …
Homogeneous observations show a recent transition to brightening in direct radiation and to dimming in diffuse radiation over …
Long-term variations of ultraviolet radiation in China from ...
CERN is the first standard network established to measure solar UV radiation for investigating the radiation budget and its spatial and temporal variations in China, which covers almost all typical ecosystems in China: marshes, cropland, grassland, forest, desert, lakes, bays and urban ecosystem [41]. Fig. 1 shows the spatial distributions …
Decadal variability of surface incident solar radiation over China ...
Existing studies have shown that observed surface incident solar radiation (R s) over China may have important inhomogeneity issues.This study provides metadata and reference data to homogenize observed R s, from which the decadal variability of R s over China can be accurately derived. From 1958 to 1990, diffuse solar radiation (R sdif) …
High-resolution assessment of solar radiation and energy …
Abstract. Global solar radiation ( Rs) is a key parameter for determining the energy yields of solar photovoltaic (PV) systems. However, long-term Rs data are not …
Evaluation and estimation of daily global solar radiation from the ...
There are various empirical models used in the estimation of global solar radiation; however, knowledge of direct and diffuse solar radiation is insufficient. Global solar radiation is the sum of direct and diffuse solar radiation, and a method that calculates global solar radiation from the estimated direct and diffuse solar radiation …
Evaluation of the Total, Direct, and Diffuse Solar Radiations From …
Surface solar radiation downwards (SSRD) [42] and total sky direct solar radiation at the surface (FDIR) [43] are the parameters used in this study to represent the amount of shortwave radiation ...
Aerosol optical and radiative properties and their environmental ...
Since the early 20th century, Chinese and international scholars have conducted measurements of the solar constant, irradiance, sunshine duration, and optical depth, and obtained direct observational data of solar radiation and optical properties (Abbot, 1910; Volz, 1959; Zhao et al., 1983; Qiu et al., 1985).
Comparison of daily diffuse radiation models in regions of China ...
The present work can deal with areas without solar radiation measurement. • Applicability of 12 k df and 6 k dc models was investigated at 17 stations in China.. k df models considering both k t and S/S 0 and four parameters were proposed.. k df models based on daily H g including measured and calculated were recommended.. k t …
Decadal variability of surface incident solar radiation over …
measure diffuse and total solar radiation, whereas measurements of direct solar radiation (Rsdir) were not impaired. The observed decadal variability of Rsdir, Rsdif, and Rs can confirm this inference based on instrument metadata (see section 8 for detailed information). WANG ET AL. SURFACE SOLAR RADIATION OVER CHINA 6500 …
Estimation of daily and monthly diffuse radiation from measurements of ...
Request PDF | On Mar 1, 2018, Hong Wang and others published Estimation of daily and monthly diffuse radiation from measurements of global solar radiation a case study across China | Find, read ...
Solar Radiation
One of the most important parameters determining the performance of a PV module or array is solar radiation. Solar irradiance is a crucial parameter for designing PV energy systems and estimating the system''s production (Al-Taani and Arabasi, 2018).Pyrheliometers and pyranometers are the two basic instruments used to measure solar radiation (Widén …
Evaluation and estimation of daily global solar radiation from the ...
The objectives of this study were to (1) propose and evaluate sunshine duration–based empirical models for the estimation of global, direct, and diffuse solar …
Estimated long-term variability of direct and diffuse solar …
and diffuse solar radiation in North China for the 1959–2016 period. Results reveal that the two methods have a good perfor-mance in estimating direct solar radiation (R2 =0.49–0.95), and the estimation accuracy of diffuse solar radiation can be improved by incorporating the influence of aerosols (R2 =0.29–0.79). Generally, total and ...
Mapping of 10-km daily diffuse solar radiation across China from ...
This long-term dataset is suitable for a better understanding of the spatial and temporal variations in diffuse solar radiation across China, and for further …
Evaluation of the Total, Direct, and Diffuse Solar Radiations From …
Based on one year of measurements from 98 stations in China, Hou et al. concluded that ERA5 overestimated the hourly global and direct radiation by …
Hourly 5-km surface total and diffuse solar radiation in China, …
Hourly 5-km surface total and diffuse solar radiation in ...
Evaluation of Reanalysis Surface Incident Solar Radiation Data in …
The CMA provides ground radiation measurements of 122 stations in China (except Taiwan, Hong Kong, and Macao). The CMA surface observations include …
Measurement Biases Explain Discrepancies between the Observed …
These instrument degradation issues were very common for the R s measurements in China before 1990. ... Direct solar radiation is generally lower than 120 W m −2 for scattered clouds ...
National Solar Radiation Database (NSRDB) | National Centers …
The National Solar Radiation Database (NSRDB) is an extensive collection of solar radiation data used by solar planners and designers, building architects and engineers, renewable energy analysts, and experts in many other disciplines and professions. ... The NSRDB offers hourly solar radiation data including global, direct, …
Prediction of diffuse solar radiation based on multiple variables in China
DOI: 10.1016/J.RSER.2018.12.029 Corpus ID: 116749408; Prediction of diffuse solar radiation based on multiple variables in China @article{Wang2019PredictionOD, title={Prediction of diffuse solar radiation based on multiple variables in China}, author={Lunche Wang and Yunbo Lu and Ling Zou and Lan …
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