Solar radiation related climate change projections for the UK

This research is mainly focussed on solar radiation in the UK. It can be divided into four main areas; evaluation of models, analysis of the relations between temperature and solar radiation, critical analysis of the projected future data for the UK and the improvement to the UKCP09 Weather Generator (WG). From the evaluations of models carried out, the Liu-Jordan model performs well for estimating the average hourly global and diffuse radiation. At the individual hourly level however, a number of problems were observed. Regarding clear- sky radiation models, for semi-arid climatic conditions Page model was found to be suitable and for humid climates Yang model is recommended. As for all-sky radiation models, the MRM and Yang model were selected. For the UK, the MRM was found to perform better than the Yang model. Furthermore, a study was carried out to analyse the relationship between temperature and solar radiation. The development of temperature-based mathematical models to obtain mean-daily irradiation was established. A procedure to decompose daily to hourly temperatures was evaluated with respect to world-wide locations and its performance found to be satisfactory. As part of the UKCP09/COPSE project, detailed analysis on the future projected data was carried out to critically evaluate sol-air temperature and the likely change that may occur in the key climatic variables, i.e. temperature, sunshine duration and solar irradiation. Drastic increase of sol-air temperatures and shifting trend of daylight illuminance were found. Furthermore, a sensitivity test was also carried out to analyse the effects of each input variables on sol-air temperature. As a result of the present investigations and communications with the UKCP personnel a new version of WG was released with appropriate modifications. A comparison of the now old- and new WG data sets has been made. Improvements in ratio of diffuse to global radiation and sunshine datasets were found.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Solar radiation related climate change projections for the UK

This research is mainly focussed on solar radiation in the UK. It can be divided into four main areas; evaluation of models, analysis of the relations between temperature and solar radiation, critical analysis of the projected future data for the UK and the improvement to the UKCP09 Weather Generator (WG). From the evaluations of models carried out, the Liu-Jordan model performs well for estimating the average hourly global and diffuse radiation. At the individual hourly level however, a number of problems were observed. Regarding clear- sky radiation models, for semi-arid climatic conditions Page model was found to be suitable and for humid climates Yang model is recommended. As for all-sky radiation models, the MRM and Yang model were selected. For the UK, the MRM was found to perform better than the Yang model. Furthermore, a study was carried out to analyse the relationship between temperature and solar radiation. The development of temperature-based mathematical models to obtain mean-daily irradiation was established. A procedure to decompose daily to hourly temperatures was evaluated with respect to world-wide locations and its performance found to be satisfactory. As part of the UKCP09/COPSE project, detailed analysis on the future projected data was carried out to critically evaluate sol-air temperature and the likely change that may occur in the key climatic variables, i.e. temperature, sunshine duration and solar irradiation. Drastic increase of sol-air temperatures and shifting trend of daylight illuminance were found. Furthermore, a sensitivity test was also carried out to analyse the effects of each input variables on sol-air temperature. As a result of the present investigations and communications with the UKCP personnel a new version of WG was released with appropriate modifications. A comparison of the now old- and new WG data sets has been made. Improvements in ratio of diffuse to global radiation and sunshine datasets were found.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Inter-relationship between mean-daily irradiation and temperature, and decomposition models for hourly irradiation and temperature

Terrestrial temperature records have existed for centuries. These records are available for very many locations. Temperature is indeed the most widely measured meteorological parameter. In contrast, solar radiation being a parameter of secondary importance and also in view of the excessive measurement cost and the associated due care, it is recorded very infrequently. This article presents evaluation of a new type of model for mean-daily and hourly solar radiation based on temperature. The proposed model is of a very simple constitution and does not require any secondary meteorological parameters as required by other group of models that are available in literature. Furthermore, hourly temperature models are also presented that only require mean-daily temperature data. A comparison was undertaken regarding the performance of the presently proposed and previous models. It was found that the present models are able to provide reliable irradiation and hourly temperature estimates with a good accuracy

Deriving and using future weather data for building design from UK climate change projections: an overview of the COPSE Project

Climate change has increasing implications for the economic and social life of the UK, as the reports of the UKCIP1 and the UK Climate Change Risk Assessment 20122 make clear. In particular, it will impact on the performance of our built environment – our buildings and the civil infrastructure that supports our urban communities and our communications networks. Recognising this, the Engineering and Physical Sciences Research Council has funded successive programmes of research aimed at improving understanding of the impact of climate change on the built environment and into means of improving its adaptability and resilience. A recent phase of this research brought together a number of research projects, including COPSE, under the umbrella of the Adaptation and Resilience to Climate Change (ARCC) Co-ordination Network (CN)3. The ARCC CN has sought to develop close links between those directly involved in the research, who are principally in universities, and prospective users of the outputs, such as policy-makers, architects and engineering consultants. To that end, it has held conferences and technical events, published summaries of the research programmes and issued regular newsletters, with the aim of promoting the outputs of the research and facilitating their application. This publication further contributes to that overall aim. Academic research is, rightly, first published in peer-reviewed journals where it can be subject to the scrutiny of other researchers, and the findings compared with those of similar studies. Journal publications are often, though, not easily accessible for practitioners who will be principally concerned with the findings and their implications rather than the methods through which they were obtained. By contrast, short non-technical summaries do not provide a suitable basis for application of the findings. This publication seeks to fill that gap, in that it offers an overview of the COPSE project which, while summarising the research undertaken, gives most attention to the outputs and their relevance for practitioners. By also providing full details of the publications from COPSE research, it facilitates further investigation by those who wish to take advantage of latest research findings