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Proceedings Paper

Distribution of solar radiation including slope effect in South Korea
Author(s): Shin Chul Baek; Jong-Hwa Park; Sang Il Na; Jin-Ki Park
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Paper Abstract

Agriculture and ecosystems are very solar radiation-sensitive making them useful for monitoring the impact on future food production. Accurate solar radiation data are necessary to evaluate major physiological reaction of crops and an impact of climate change. For most upland crops and orchard plants growing in sloping terrain, however the meteorological data are often limited. Considering the scarcity of detailed meteorological data around the country, there is a need for methods which can estimate reference solar radiation with limited data. This study describes a method to estimate monthly average daily solar radiation of considering the slope distribution. It was calculated using the 2010’s meteorological data and KT method which is entered DEM and spatial interpolation data of both monthly average daily extraterrestrial radiation and monthly average daily radiation on land surface. Extracted slope from the DEM in South Korea include range between 0∘ to 77∘ and most of the land is mountainous. According to the slope, solar radiation characteristic show to have high value in spring season (April) relatively other season. Summer season interrupt to reach direct solar radiation, cause is unstable atmospheric and cloud. The distributions of monthly accumulated solar radiation indicated that differences caused by the topography effect are more important in winter than in other season because of the dependency on the solar altitude angle and duration of sunshine. Result of KT method is confirmed to overestimate monthly average 1.38MJ⁄m􀬶⁄day than solar radiation weather station measurement values. Solar radiation of slope error value will need continuous research and correction through both fields survey and topography factor.

Paper Details

Date Published: 21 November 2012
PDF: 8 pages
Proc. SPIE 8524, Land Surface Remote Sensing, 85242K (21 November 2012); doi: 10.1117/12.977420
Show Author Affiliations
Shin Chul Baek, Chungbuk National Univ. (Korea, Republic of)
Jong-Hwa Park, Chungbuk National Univ. (Korea, Republic of)
Sang Il Na, Chungbuk National Univ. (Korea, Republic of)
Jin-Ki Park, Chungbuk National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 8524:
Land Surface Remote Sensing
Dara Entekhabi; Yoshiaki Honda; Haruo Sawada; Jiancheng Shi; Taikan Oki, Editor(s)

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