Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33417
Title: Analysis and modelling of water vapour and temperature changes in Hong Kong using a 40-year radiosonde record : 1973-2012
Authors: Liu, Z 
Chen, B
Chan, ST
Cao, Y
Gao, Y
Zhang, K
Nichol, J 
Keywords: Precipitable water vapour (PWV) radiosonde
PWV change analysis and modelling
Radiosonde
Temperature change analysis and modelling
Issue Date: 2015
Publisher: John Wiley and Sons Ltd
Source: International journal of climatology, 2015, v. 35, no. 3, p. 462-474 How to cite?
Journal: International Journal of Climatology 
Abstract: Radiosonde observations provide a good data source for examining the long-term trend of atmospheric water vapour, temperature and cold point tropopause (CPT). In this article, precipitable water vapour (PWV) and surface temperature from the Hong Kong radiosonde station over the period of 1973-2012 are analysed. We find that the atmospheric water vapour in Hong Kong in the layers from the surface to approximately 1181m, from ~1181 to ~2509m, from ~2509 to ~5126m and from ~5126 to ~8093m accounts for 50, 25, 20 and 5% of the PWV, respectively. The atmosphere is almost completely dry above approximately 8000m. Surface temperature has increased at a rate of 0.16¢X decade-1 over the past 40 years. On a seasonal timescale, the largest rate of increase is 0.23¢X decade-1 in winter and the smallest rate is 0.09¢X decade-1 in spring. The CPT height is located at approximately 17.5km above mean sea level over the period of this study. This CPT height is estimated to have risen at a rate of 87.3m decade-1 over 1983-2012, which is 1.36 times the global average. The CPT temperature is observed to decrease at a rate of 0.84¢X decade-1, which is 2.05 times the global average. Taking advantage of the periodicity of PWV an
URI: http://hdl.handle.net/10397/33417
ISSN: 0899-8418
DOI: 10.1002/joc.4001
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