Sunshine Monitoring Articles

  • Two new parameters for the Lufft weather expert’s weather station

    After the first operating year of my weather station in Friedrichweiler, inaugurated in May 2013, it was clear to me that two important weather parameters were still missing. I wondered: Is a weather station without measuring the sunshine duration sufficient? And would an additional to ground frost sensor make sense? My decision was made: I wanted to ...

  • Spatial and temporal variation of reference evapotranspiration under climate change: a case study in the Sanjiang Plain, Northeast China

    It is essential to understand the changing patterns in reference evapotranspiration (ET0) and its relation to climate variables. In this study, meteorological data obtained from the Sanjiang Plain (SJP) between 1959 and 2013 are used to calculate ET0 via the Penman–Monteith method. This study analyses the spatial and temporal changes of ET0 and determines which meteorological ...


    By IWA Publishing

  • Modelling of runoff and sediment yield using ANN, LS-SVR, REPTree and M5 models

    In this study, the performance evaluation of five machine learning models, namely, ANNLM, ANNSCG, least square-support vector regression (LS-SVR), reduced error pruning tree (REPTree) and M5, was carried out for predicting runoff and sediment in the Pokhariya watershed, India using hydro-meteorological variables as input. The input variables were selected using the trial-and-error procedure ...


    By IWA Publishing

  • New white papers added to the SPN1 Sunshine Pyranometer Online Resource Centre

    Two notable new research papers have been added to the fast growing SPN1 Sunshine Pyranometer online resource centre. The SPN1 Resource Centre is designed to help visitors fully understand the workings and benefits of the SPN1 (including calculation of DNI), and to provide access to the latest SPN1-related ...


    By Delta-T Devices Ltd.

  • Measuring of the Sunshine Duration

    The WMO (World Meteorological Organization) defines the Sunshine Duration as the time during which the direct solar radiation exceeds the level of 120 W/m2.   The DeltaOHM sensor LPSD18, performs the measure of radiation with an array of photodiodes arranged in a particular geometry which allows to obtain an accurate measurement in any ...

  • Modelling and prediction of global, direct and diffuse hourly solar irradiance

    In this paper, a model for predicting hourly global, diffuse and direct solar irradiance is described. A dataset of measured air temperature, relative humidity, direct, diffuse and global horizontal irradiance for Madinah site (Saudi Arabia) were used in this study. Several combinations have been proposed, and the best performance is obtained by using sunshine duration, air temperature and ...


    By Inderscience Publishers

  • Sunshine duration hours over the Greek region

    In this study, the temporal and spatial distribution of bright sunshine hours and relative sunshine duration over Greece are presented. The datasets used for this study were obtained from the archives of the Hellenic National Meteorological Service (HNMS). Furthermore, mean annual and seasonal duration of bright sunshine has been estimated from empirical formulae, which depend on the following ...


    By Springer

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