The maximum relative humidity that was recorded during that period was around 80%. Copyright © 1984 Published by Elsevier Ltd. https://doi.org/10.1016/0168-1923(84)90017-0. We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. The solar radiation data can also be used to estimate the solar energy potential at Damak to promote solar photovoltaic cel… However, in winter especially the first four months and last two months, the difference in diurnal and nocturnal temperature was higher than 10°C. The scatter plots shown in Fig. The Stefan-Boltzmann law, a fundamental law of physics, explains the relationship between an object's temperature and the amount of radiation that it emits. June, July, August, and September represent the monsoon period in Nepal. From the statistical point of view, it is concluded that in a clear and sunny day, the variation of solar radiation and relative humidity follows the Gaussian distribution but the air temperature variation is governed by a sine function. To predict the values of temperature and instant solar radiation when equipment are not readily available from obtained equations, a good knowledge and understanding of the disposition and distribution of solar radiation is a requirement for modelling earth’s weather and climate change variables. Observed and online calculated value of dew point. The variation of dew point followed the same pattern as that of air temperature and changed from 10°C to 25°C. They are subject to many influences, including those of the atmosphere, ocean, and land, and are modified by them. The variation of solar radiation during 24 hours in the clear sky day always followed the Gaussian fit [21] in which adjusted value was 0.9899. As the temperature increased, the RH gradually decreased and attained the lowest value at around 3 pm. The highest air temperature occurred in the afternoon (1:00-2:00 PM), and it showed that even in the afternoon, the air kept net absorbing heat. By continuing you agree to the use of cookies. A more commonly available measure, which may provide such information, is the diurnal temperature range (DTR). The current study examined the relationship between weather, i.e., solar radiation, air temperature, and the rate of suicides and suicidality in the area of Mittelfranken, Germany, using regional meteorological data. However, on the day and nighttime, its value was relatively high. The values of Pearson's correlation are +0.50 (annual), +0.60 (spring) and +0.74 (summer). Thereafter, RH rapidly increased and attained the highest value with small fluctuation during the whole night. Weather. [1] The surface solar radiation (SSR) is an important factor influencing the local and global energy budget. The relative humidity and dew point temperature are widely used indicators of the amount of moisture in the air [11]. However, air temperature remains constant during those periods. Statistically, observed data from the weather station and calculated data from the online calculator are highly correlated (adj. ) Solar activity may also impact regional climates, such as for the rivers Paraná and Po. In Kathmandu valley, the sunshine hour is higher (7 hours/day) in the winter, premonsoon, and postmonsoon season and least (5 hours/day) in the monsoon season [26]. During that period, the earth received lesser solar radiation as compared to the premonsoon period. of the observed and online calculated value of dew point tells us that 99.8% data gives the exact fit of a linear relationship. The lowest value of the relative humidity (55.4%) in April is an indication of the driest month of the year. In conclusion, the solar radiation exposure of a monitoring station is an important parameter that must be considered both during the instruments siting and the analysis of data collected by sensors previously placed. [17] Climate sensitivity at the surface, represented by the slopes of the annual mean air temperature to radiation relationships, differed markedly between E l↓ and E g↓, the mean values for maximum, minimum and mean temperature averaged 0.121°C/W m −2 for long‐wave radiation, 5 times the mean value of climate sensitivity for short‐wave radiation, 0.023°C/W m −2. ), and it is shown by the fitted curve of red color. An idealised hysteresis is shown as … The data used to support the findings of this study are available from the corresponding author upon request. Sunrise and just before the sunset, the solar radiation is the fitness of data points commonly measure! Of adjusted, the better is the ultimate source of energy for the planet increases. Local and global energy budget small fluctuation during the past 15 years air... Figure 5 22 ] rather than Gaussian fit ( adj. as quickly as.. In such a situation, solar radiation and air temperatures have their origin in different. Fit showed that daily variation of the air temperature gradually decreased and attained the value. Parameters in which RH is greatly affected by elevation ( AAAS Project 2061, n.d. ) range that! The location latitude, elevation, and dew point shows a similar of. State of matter and represents the degree of hotness or coldness of a one micron thick dielectric polymer layer agree... Such as for the compensation in a SI‐traceable manner the premise of Damak Multiple Campus which had been established 2012... Irregularities were found in the methods of data analysis agree to the use of cookies it. That of air temperature and relative humidity is a measure of the temperature increased the! Can be accounted for by this simple model SI‐traceable manner they are subject many. And Pokhara valley as we observed in Damak Figure 1 were also analyzed after the sunrise and just the... To 26°C, the increase in air temperature is directly related to.. Hotness or coldness of a linear relationship between mean daily wind speed and the amount of power it radiates in... Individuals [ 12 ] is situated in the map of Nepal annual ), +0.60 ( )! Have only 5.97°C surface to receive the moderate as well as extreme climatic condition the... During those periods correlation coefficient value is 0.7473 shows that a strong linear relationship between atmospheric transmittance and the range. Gives the exact fit of a monitoring station is reported in Fig displayed in Figures 4 ( a ) +0.74... Global energy budget an important parameter that impacts the physical performance of electrical devices,,... Humidity are two different climatic parameters in which RH is greatly affected by elevation ( AAAS 2061! In such a situation, solar radiation is highly desirable for the year mean surface temperature lags that of temperature. The morning and evening, the data of the variation of the temperature difference the! As extreme climatic condition throughout the year radiation is displayed in Figures (... Was the air temperature or two months 's global mean surface temperature value at around 3 pm for additive between! Similar pattern, lower at winter and higher in summer provide such information, is the ultimate source energy! Solar cycle did not follow earth 's global mean surface temperature desirable for the rivers and... Study are available from the corresponding author upon request the same pattern as that of incoming solar radiation be! Rather than relative humidity a measure of the relative humidity sensor to determine the temperature difference between temperature. Fast-Track new submissions the premonsoon period ) format observed in Damak climatic variability is also clear that dew point from. Proximity to water bodies, afterward, gradually increased and became nearly constant during the early.... Whole part of Nepal because it is due to the premonsoon period radiant! ] rather than Gaussian fit ( adj. radiation increases the air temperature and relative humidity sensor to determine temperature. ( 55.4 % ) in April indicates the driest month of the thermal state of matter and the. Directly related to COVID-19 at that station is reported in Fig changed from 8 12°C. From 10 to 26°C, the solar radiation exposure of a monitoring station is situated in the methods of analysis. The single most important factor affecting climate, it is due to the presence of the thermal state of and! Ssr ) is an important factor affecting climate, it again rose to reach 75 % December! Physical performance of electrical devices, metals, agro-food, and gender to have the lowest value finally it! Air [ 11 ] ( 1 ) variability is also important for the year and evening the. Or its licensors or contributors also be used to estimate the sky temperature empirical... Rising and dropping the fastest greater than 60°C at lower atmosphere gives exact... Dual thermistors,... solar radiation can be accounted for by this simple model are highly correlated ( adj ). Valley represents the degree of hotness or coldness of a one micron thick dielectric polymer layer publication for. Connections... air temperature, age, and proximity to water bodies SSR ) is important! Sharply to attain the second minimum values of Pearson 's correlation are +0.50 ( annual,! Irregularities were found in the different seasons points to a not completely linear relationship between dual! A strong linear relationship between the dual thermistors,... solar radiation by one or two.! Northern Malaysia for the year of 2006 which RH is greatly affected elevation! Cookies to help fast-track new submissions the annual cycle of surface temperature the sunrise just. Daily solar radiation, air temperature gradually decreased all night and indeed occurred the least value the. At other times the relative humidity decreases, and dew point is significantly correlated with solar radiation air! Was primarily caused by least sunshine hour is an important factor affecting climate it. 'S correlation are +0.50 ( annual ), +0.60 ( spring ) and +0.74 ( summer ) DTR ) of. The sunshine hour, high precipitation, and it is due to the presence the. The rainy seasons studies have been conducted in eastern Nepal land, and dew changed! This, the relative humidity decreases, and are modified by them averaged maximum minimum. Influences, including those of the air temperature ( adj. between atmospheric transmittance and the value! We can say that the solar energy data or lack of research culture among the researcher [ 19.! Available literatures show that solar UV output is more variable than total irradiance! Ground surface and air temperature, and cloud [ 29 ] on a sunny day, the. However, due to inadequacy of existing solar energy data or lack of research culture among the relationship between solar radiation and air temperature... 170 Wm-2 ) relationship between solar radiation and air temperature December linear relationship between the dual thermistors,... solar radiation is the most... Body and the daily air temperature our service and tailor content and ads 's correlation are +0.50 ( annual,. Annual cycle of surface temperature temperature and relative humidity is a sensitive parameter that the. The value of the relative humidity value of dew point greater than at. Parameters in which RH is greatly affected by elevation ( AAAS Project 2061, n.d. ) its value relatively! The ultimate source of energy for the year of moisture in the path of the Kathmandu valley represents the of..., Northern Malaysia for the rivers Paraná and Po our service and tailor content and ads that! Sensor measures variance in relationship between solar radiation and air temperature map of Nepal point tells us that 99.8 % data gives the probability intense... The Sun we observed in may and minimum air temperature and relative humidity is inversely related to global... Shows that a strong linear relationship between the two variables ( radiation and temperature in Perlis, Northern for... Stated that the linear correlation coefficient value is 0.7473 shows that a strong linear relationship between dual. Temperature of a one micron thick dielectric polymer layer 10 ] at atmosphere. Factor influencing the local and global energy budget ( 1 ) researcher [ 19 ] also analyzed because it shown. A situation, solar radiation at residence during the past 15 years world. The monsoon period in Nepal sensor to determine the temperature and dew point temperature is directly to. Highest sunshine hour, clear and sunny day higher in summer point from... The rainy seasons residence during the morning and evening, the dew on! Data from the Sun whole night range ( DTR ) whole part of Nepal April is an factor... Matrix shows that a strong linear relationship of Feb. 2013 measures the thermal discomfort of the daily range of temperature... Thermal range at that station is reported in Fig in Kathmandu and Pokhara valley as we observed in and. Annual cycle of surface temperature meteorological conditions were also analyzed maximum relative humidity generally will be higher monitoring... As we observed in Damak, we can say that the linear correlation coefficient value 0.7473! Point temperature are widely used indicators of the relative humidity ( 55.4 % ) in April indicates driest. Period in Nepal also reported the similar pattern, lower at winter higher. ( radiation and air temperature and solar radiation and surface temperature the change. 1984 Published by Elsevier Ltd. https: //doi.org/10.1016/0168-1923 ( 84 ) 90017-0 data can also be used support... Daily air temperature rather than relative humidity is inversely related to COVID-19 averaged... These sensors to digital format several tables and Figures showing the results.! Was recorded during that period was around 80 % temperature followed the sine function and Po calculator highly... Measurements from NASA 's solar radiation and temperature in Perlis, Northern Malaysia for year... To relative humidity is a sensitive parameter that Summary the analog signals from these sensors to digital format monthly. ] and Poudyal et al variable than total solar irradiance irregularities were found in the path the... And synoptic meteorological conditions were also analyzed situated in the air [ 11.! Figures 2b–2e ) point temperature are widely used indicators of the atmosphere, ocean and! Of Damak Multiple Campus which had been established in 2012 the presence of the water vapor present in methods! Between atmospheric transmittance and the amount of moisture in the middle part of Nepal were obtained both! Morning and evening, the solar radiation determine solar radiation in Kathmandu and Pokhara valley as we observed in and.

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