Characterization of Water Vapour Variability Based on GPS Sensing

By Wayan Suparta, Mohd. Alauddin Mohd. Ali and Baharudin Yatim.

Published by The International Journal of Climate Change: Impacts and Responses

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Article: Print $US10.00
Article: Electronic $US5.00

Water vapour variability is related to the global warming. It is expected to increase due to intensity in the severe of weather conditions and solar influence on atmospheric events. As a source of precipitation, it is the biggest contributor to the ‘natural greenhouse effect’ and this ‘positive feedback’ makes water vapour play a critical role in the global climate system. However, water vapour remains one of the most poorly characterized meteorological parameters. Improved knowledge of its distribution and mechanisms will have a major impact on a better planning of resources as well as the key to a better understanding of global climate change, in particular in such sensible areas as the poles. This paper aims to characterize polar water vapour and to detect their evolution using GPS sensing. It is obvious that the tremendous capability of low-cost GPS technique has the essential tool in detecting global climate change such as to measure accurately the vertical integrated precipitable water vapour (PWV). Five year of PWV time series at Scott Base station, Antarctica from 2003 to 2007 together with the surface meteorological parameters are presented. Although the solar variations in modulating recent climate change still ambiguous in a short-term studies, their evidence will be investigated through the water vapour response to the solar forcing. Results show significant seasonal signal in the Antarctic water vapour cycle, which is very active (highest) during the summer and inactive (lowest) for the winter periods.

Keywords: Global Climate Change, GPS PWV, Polar, Surface Meteorology

The International Journal of Climate Change: Impacts and Responses, Volume 1, Issue 1, pp.17-30. Article: Print (Spiral Bound). Article: Electronic (PDF File; 2.480MB).

Dr. Wayan Suparta

Lecturer (Research Fellow), Institute of Space Science, Universiti Kebangsaan Malaysia, UKM Bangi, Selangor, Malaysia

Wayan Suparta received his PhD degree in Electrical, Electronic and Systems Engineering from the National University of Malaysia (Universiti Kebangsaan Malaysia). He is currently a lecturer (Research Fellow) at the Institute of Space Science of National University of Malaysia. His main research currently is focused on electronic communication and remote sensing such as a novel GPS technology, Radar and modern weather systems for atmospheric sciences and solar-terrestrial interactions studies. He also a member of SCAR/IPY cluster for polar research.

Dr. Mohd. Alauddin Mohd. Ali

Professor, Dept of Electrical, Electronic and System Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi, Selangor, Malaysia

Mohd Alauddin Mohd Ali received the BEng. (Electrical), BSc. (Mathematics) and MEng.Sc. (Electrical) degrees from the University of Tasmania, Australia in 1978, 1979 and 1984 respectively, and the PhD degree from the University of Nottingham, England in 1994. He is currently a professor in the Department of Electrical, Electronic and Systems Engineering National University of Malaysia (UKM). His current research interests include biomedical signal processing, instrumentation, IC design and testability.

Dr. Baharudin Yatim

Director, Institute of Space Science, Universiti Kebangsaan Malaysia, UKM Bangi, Selangor, Malaysia

Baharudin Yatim received his BSc and PhD degrees both in Physics from the University of Kent, Canterbury, England in 1970 and 1974 respectively. He is currently a professor of applied physics at the Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM) and Director of Institute of Space Science UKM. His research interests include development of solar energy technologies, Photovoltaic water pumping system and space sciences. He is also member of American Association for the promotion of science, USA and International member of solar energy society, Germany.

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