HOME / Solar China Level Direct Radiation

Solar China Level Direct Radiation

A Revisit of Direct and Diffuse Solar Radiation in China Based on

Increasing energy and food demands require an understanding of not only the availability and variability of total solar radiation (R) but also its partitioning into direct (R d) and diffuse (R f) components, which are key elements for solar power generation and plant photosynthesis, respectively.Potential inhomogeneities in surface solar radiation observations,

Variability in Direct and Diffuse Solar Radiation Across

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.

Trend of surface solar radiation over China in relation to changing

A Revisit of direct and diffuse solar radiation in china based on homogeneous surface observations: climatology, trends, and their probable causes

Hourly clear-sky solar irradiance estimation in China: Model

According to the statistics of the China Meteorological Data Network, 122 solar radiation measurement stations have been installed in China. The Chinese Ecosystem Research Network (CERN) was established in 2004 and could provide hourly CSI observations covering the Chinese mainland. However, these CSI observation networks were still too scarce to support

Direct normal solar radiation in China. (Note: This

Download scientific diagram | Direct normal solar radiation in China. (Note: This map was created by the National Renewable Energy Laboratory for the U.S. Department of Energy with data provided

Observations and Implications of Diurnal Climatology and Trends

Spatial distribution of the 16 homogeneous direct (Rd) and diffuse (Rf) solar radiation stations across China. The ratio of Rd to Rf (denoted by stars) and the decadal Rd

Country-level evaluation of solar radiation data sets using

In this study, we used 16 years (2001–2016) of daily global (H), direct (H b), diffuse (H d), hourly global (G h) solar radiation data acquired from 98 stations (10 stations owning direct solar radiation and 4 stations owing hourly global solar radiation) over China to evaluate the accuracies of two satellite-derived products

Long-term variations of surface solar radiation in China from

After 1990, the instruments manufactured of China (DFY-3 pyrheliometer and DFY-4 pyranometer) are used to observe SSR, diffuse solar radiation and direct solar radiation (Shi et al., 2008). Furthermore, the solar observation instruments are calibrated by using multi-step method. Firstly, stations are calibrated against the reference instruments at least once per

A Revisit of Direct and Diffuse Solar Radiation in

1 Introduction. Solar radiation reaching the Earth''s surface, also known as surface solar radiation or total solar radiation (R), is the primary energy source that governs diverse physical, chemical, and biological processes on

Hourly 5-km surface total and diffuse solar radiation in China,

Surface solar radiation is an indispensable parameter for numerical models, and the diffuse component contributes to the carbon uptake in ecosystems. We generated a 12-year (2007–2018) hourly

Estimated spatiotemporal variability of total, direct and diffuse

Both models perform well in the estimate of direct (R2 = 0.71–0.89) and diffuse radiation (R2 = 0.63–0.95). The increasing total radiation in eastern China since 2000 is mainly contributed by

Country-level evaluation of solar radiation data sets using ground

In this study, we used 16 years (2001–2016) of daily global (H), direct (H b), diffuse (H d), hourly global (G h) solar radiation data acquired from 98 stations (10 stations

Assessment of solar radiation resource and photovoltaic power

To this end, this study aims to provide an accurate and reliable strategy to address the current sparse coverage of solar radiation measurements in China, as well as to produce a long-term solar radiation dataset for assessing and understanding the national solar radiation resources and PV power potential. To fulfill these objectives, this

Assessment of solar radiation resource and photovoltaic power

To this end, this study aims to provide an accurate and reliable strategy to address the current sparse coverage of solar radiation measurements in China, as well as to

Trend of surface solar radiation over China in relation to

A Revisit of direct and diffuse solar radiation in china based on homogeneous surface observations: climatology, trends, and their probable causes

First Effort for Constructing a Direct Solar Radiation

We applied this method to compile a long-term, high-density data set of daily direct radiation over China based on observations from 2,473 routine weather stations of the China Meteorological Administration (CMA)

Observations and Implications of Diurnal Climatology and Trends

Spatial distribution of the 16 homogeneous direct (Rd) and diffuse (Rf) solar radiation stations across China. The ratio of Rd to Rf (denoted by stars) and the decadal Rd and Rf trends...

Variations of Solar Radiation in Typical Resource Regions of China

Based on the total solar radiation, horizontal direct radiation and scattered radiation data of six typical resource regions in China from 1961 to 2016, this paper focuses

Daily Global Solar Radiation in China Estimated From

The present study introduces the RF model, a popular and highly flexible machine learning algorithm, to estimate solar radiation across China at the national scale. The estimated DGSR is in good agreement with site observations across China, with mean R, RMSE, and MB values of 0.95, 2.34, and −0.04 MJ/m 2, respectively.

First Effort for Constructing a Direct Solar Radiation Data Set in

5 Constructing a Direct Radiation Data Set in China. By applying our direct radiation estimation method to the 2,473 CMA routine meteorological stations, we constructed for the first time a high-density data set of daily direct radiation over China that covers the period 1961–2013, as well as a data set of daily direct normal irradiation. It

Spatial and temporal characteristics of surface solar radiation in

In this paper, we used ERA5 monthly total-sky direct solar radiation at the surface (SRS) data, with a spatial resolution of 0.25° × 0.25°, for the period 1961–2020.

Estimated spatiotemporal variability of total, direct and diffuse solar

Both models perform well in the estimate of direct (R2 = 0.71–0.89) and diffuse radiation (R2 = 0.63–0.95). The increasing total radiation in eastern China since 2000 is mainly contributed by diffuse radiation.

First Effort for Constructing a Direct Solar Radiation Data Set in

Variability in Direct and Diffuse Solar Radiation Across China

Variations of Solar Radiation in Typical Resource Regions of China

Based on the total solar radiation, horizontal direct radiation and scattered radiation data of six typical resource regions in China from 1961 to 2016, this paper focuses on analyzing the variation trend of solar radiation by using climate tendency estimation method, cumulative anomaly method, Morlet wavelet analysis method and Mann-Kendall mutation

Spatial and temporal characteristics of surface solar

In this paper, we used ERA5 monthly total-sky direct solar radiation at the surface (SRS) data, with a spatial resolution of 0.25° × 0.25°, for the period 1961–2020.

Variations of Solar Radiation in Typical Resource Regions of China

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) and direct solar

Street-level solar radiation mapping and patterns profiling

In this study, we propose a framework to map and profile the street-level solar radiation using Baidu Street View (BSV) images. In our framework, a BSV-based radiation estimation method considering weather conditions is established to map the hourly street-level solar radiation. Then, a two-stage clustering method is proposed to profile the

Solar China Level Direct Radiation [PDF]

6 FAQs about [Solar China Level Direct Radiation]

Can We estimate daily direct radiation in China?

Because reliable data on surface solar radiation are so sparse, particularly the observations of direct radiation that are especially relevant for CSP thermal systems, this study developed a method to estimate daily direct radiation in order to derive a long-term high-density data set of daily direct radiation in China for the first time.

Can machine learning estimate solar radiation across China?

What is the average solar radiation intensity in China?

Figures 9 a and 9 b show that the annual average DGSR ranges from 6 to 26 MJ/m 2, with a national-average value of 15.55 MJ/m 2 during 2013–2014. Spatial differences are evident across China, indicating that the solar radiation intensity in northern China (western China) is higher than that in southern China (eastern China).

Where does solar radiation come from in China?

The results of both studies indicate that insolation is highest on the Tibetan Plateau and lowest in the Sichuan Basin, and suggest that the receipt of solar radiation in China is impacted by both seasonal and interannual variations.

What data did we collect from 98 solar radiation measurement stations in China?

We used data acquired between 2001 and 2016 from 98 solar radiation measurement stations in China to verify two satellite-derived products (SARAH-E and CERES-SYN1deg) and two reanalysis data sets (ERA5 and MERRA-2).

Is surface incident solar radiation a significant inhomogeneity issue over China?

The sum of the observed Rdir and Rdif, surface incident solar radiation (Rs), has been criticized as of significant inhomogeneity issue over China. In this study, we further demonstrated that this is primarily due to the sensitivity drift of pyrheliometer used to measure Rdir before 1990.

Solar China Level Direct Radiation

6 FAQs about [Solar China Level Direct Radiation]

Related links