| Author: | Chan, Ying-wa |
| Title: | A study of the measurement and variation of UV index in Hong Kong |
| Degree: | M.Sc. |
| Year: | 1999 |
| Subject: | Ultraviolet radiation -- China -- Hong Kong Ultraviolet radiation -- China -- Hong Kong -- Measurement Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies Department of Civil and Structural Engineering |
| Pages: | ix, 103 leaves : ill. (some col.) ; 30 cm |
| Language: | English |
| Abstract: | The decline of stratospheric ozone has drawn a growing concern of the trend of UV radiation. In recent years, UV index programs are run in many different countries so that the public can be informed of the variations of UV levels. While different UV indices are adopted in these programs, major effort has been put by the World Meteorological Organization (WMO) to standardize the definition and calculation of UV index. The aim of the present work is to base upon those recommendations of the WMO to study the UV index in Hong Kong. The index is derived from measurement results of two instruments, namely a broadband UVB-1 pyranometer and a spectral Brewer spectrophotometer which are installed at the Hong Kong Polytechnic University's air monitoring station at Cape D'Aguilar. UV index values measured by the broadband and spectral instruments are analyzed separately and a comparison is made between them. A radiation transfer model is also run and its output compared with the measurement results. The temporal variations of UV index in Hong Kong are also studied. These include primarily the diurnal and the seasonal variations. For the annual trend of UV index, not enough data is made available for definitive conclusion. Finally, some interesting UV index profiles measured by the instruments are selected so as to study the meteorological influence on the UV index in Hong Kong. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b14799868.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 11.94 MB | Adobe PDF | View/Open |
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