A study of the measurement and variation of UV index in Hong Kong

Pao Yue-kong Library Electronic Theses Database

A study of the measurement and variation of UV index in Hong Kong


Author: Chan, Ying-wa
Title: A study of the measurement and variation of UV index in Hong Kong
Year: 1999
Subject: Ultraviolet radiation -- China -- Hong Kong
Ultraviolet radiation -- China -- Hong Kong -- Measurement
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Civil and Structural Engineering
Pages: ix, 103 leaves : ill. (some col.) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1479986
URI: http://theses.lib.polyu.edu.hk/handle/200/692
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.

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