Evaluation of global solar radiation, cloudiness index and sky view factor as potential indicators of Ghana's solar energy resource

Tanu, Michael; Amponsah, William; Yahaya, Bashiru; Bessah, Enoch; Ansah, Samuel Owusu; Wemegah, Cosmos Senyo; Agyare, Wilson Agyei

doi:10.1016/j.sciaf.2021.e01061

Cited by 13 publications

(8 citation statements)

References 26 publications

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“…This is explained by the high intercepted radiation in the northern regions compared to the south, as also observed by Yang et al (67). Tanu et al (68) found the cloud cover index in the southern regions to be higher compared to the northern regions, further explaining this radiation pattern for Ghana.…”

Section: Maize Potential Yield and Yield Gap Map In Ghanasupporting

confidence: 63%

An integrative approach based on crop modeling and geospatial and statistical analysis to quantify and explain the maize (Zea mays) yield gap in Ghana

Boullouz

Bindraban²,

Kissiedu³

et al. 2022

Front. Soil Sci.

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In Ghana, maize (Zea mays) is a crop crucial to achieving food and nutrition security. Maize consumption has increased exponentially over the past decades and contributes to 25% of the caloric consumption in the country. In order to assist in decision-making and guide investment in sustainable intensification of maize production, this study set out to identify the determinants of yield and to arrive at potential interventions for closing the maize yield gap. These were quantified using analytical approaches that combine a light use efficiency crop model (LINTUL-1) with statistical and geospatial analyses. Legacy data, auxiliary covariables, and maize fertilizer trials on eight experimental stations in Ghana were used in this study. Overall, the maize yield gap across the stations and trial treatments ranged from 17% to 98%. The variation in yield gap within a single station indicates a significant scope for closing the yield gap through site-specific nutrient management. Multiple linear regression models that explained 81% of the variability in maize yield gap identified soil organic matter, soil water-holding capacity, root zone depth, rainfall, sulfur fertilizer, and nitrogen fertilizer, in that order of importance, as the major determinants for closing the yield gap in the major agroecological zones of Ghana. The yield gap decreased by 1.4 t ha-1 with a 1% increase in soil organic matter. A 1 mm increase of the soil water-holding capacity reduced the yield gap by 1.06 t ha-1, while an increase in pH and in the application of potassium fertilizer widened the gap. These results suggest that both soil physical and chemical properties, together with weather data, should be taken into consideration to arrive at site-specific fertilizer recommendation and other agronomic practices.

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Section: Maize Potential Yield and Yield Gap Map In Ghanasupporting

confidence: 63%

An integrative approach based on crop modeling and geospatial and statistical analysis to quantify and explain the maize (Zea mays) yield gap in Ghana

Boullouz

Bindraban²,

Kissiedu³

et al. 2022

Front. Soil Sci.

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“… [ 42 ] Ghana Modified Angström-Prescot, modified Steyn-method, Ordinary kriging method Sunshine duration Global solar radiation, sky view factor, cloudiness index 2015–2018 r Sky conditions were calculated by different methods for the 4 climate regions of Ghana. [ 43 ] China Empirical PV power model, combined a sunshine-based model, and inverse distance weighting model Minimum and maximum temperature, sunshine duration, relative humidity, and precipitation Global solar radiation 1961 to 2018 RMSE, MAE, RRMSE, R 2 , and NS New developed global solar radiation model can predict correctly. [ 44 ] Fiji island 20 empirical models Sunshine duration, minimum, mean, and maximum temperatures, cloud cover, and relative humidity Global solar radiation 1984 to 2018 ME, NSE, PME, RMSE, and r-value 20 models were analyzed by dividing into 3 different groups.…”

Section: Literature Reviewmentioning

confidence: 99%

A state of art review on estimation of solar radiation with various models

Gürel¹,

Ağbulut²,

Bakır³

et al. 2023

Heliyon

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“…SVF is used as an indicator of the characteristics of urban shapes. A correlation between the urban environment and SVF has been reported [35,36], and SVF has been used as an index relating solar radiation and surface radiation [37,38].…”

Section: Creation Of Orthographic Imagesmentioning

confidence: 99%

Risk Assessment of Heat Stroke during the Marathon of the Tokyo 2020 Olympics in Sapporo, Hokkaido

Osawa

Mori

Shinagawa³

et al. 2023

Sustainability

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A marathon is a grueling endurance race, and runners are at risk of heatstroke. Therefore, the thermal environment of the marathon course should be accurately assessed. Solar radiation, a factor in the thermal environment, is particularly affected by the surrounding environment. In this study, we proposed a method to calculate wet-bulb globe temperature (WBGT) in a short period of time using geographic information system (GIS) data, considering changes in solar radiation. WBGT is used as an indicator of heat stroke. This method was used to assess the risk of heat stroke due to weather conditions, span of time, and location on the marathon course of the Tokyo 2020 Olympics. According to the analysis results, in Sapporo, trees and buildings can suppress WBGT by about 2 °C, but on days when the average temperature exceeded 26 °C, WBGT exceeded 21 °C from 5:00 to 13:00. On the contrary, even in August, the hottest month of the year, there were days when WBGT was almost always below 21 °C from 5:00 to 13:00. In other words, it is concluded that the risk of heat stroke can be reduced if the marathon is held in accordance with the weather conditions of the day. In addition, by mapping and identifying locations where there is little change in attenuated WBGT, it is possible to identify locations where the thermal environment should be improved.

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Evaluation of global solar radiation, cloudiness index and sky view factor as potential indicators of Ghana's solar energy resource

Cited by 13 publications

References 26 publications

An integrative approach based on crop modeling and geospatial and statistical analysis to quantify and explain the maize (Zea mays) yield gap in Ghana

An integrative approach based on crop modeling and geospatial and statistical analysis to quantify and explain the maize (Zea mays) yield gap in Ghana

A state of art review on estimation of solar radiation with various models

Risk Assessment of Heat Stroke during the Marathon of the Tokyo 2020 Olympics in Sapporo, Hokkaido

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