Analysis of GPS-sensed atmospheric water vapour variability and its response to the terrestrial winds over Antarctica

Wayan Suparta, Mohd Alauddin Mohd Ali, Baharudin Yatim, Grahame J. Fraser

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Recent advances in GPS sensing technology and the availability of low-cost GPS receivers have allowed the continuous measurements of atmospheric water vapour in all weather conditions and on a global scale. This paper aims to analyze the variability of the Antarctic precipitable water vapour (PWV) observed by GPS receivers. In this contribution, the influence of terrestrial winds on the PWV variations is investigated where the climatology is extremely different from that in the Equatorial region. For this purpose, GPS and surface meteorological data for the period of 2003-2005 are analyzed. A significant diurnal variation in PWV was found over most of the sites with PWV difference increasing more than 0.50 mm during summer compared to the winter times on a monthly analysis. Increase in Antarctic PWV evidently follows the variations of the surface temperature. In winter, the temperature increase will be lower by about 1 °C and values of water vapour are 13% smaller than during summer months. The characteristics of Antarctic climate represented by the PWV variation show a seasonal dependence, higher (active) in summer and lower (inactive) in winter. It was found that the large decreases in the monthly mean PWV distribution were accompanied by strong winds above 10 m s-1. Crown

Original languageEnglish
Pages (from-to)72-87
Number of pages16
JournalPhysics and Chemistry of the Earth
Volume34
Issue number1-2
DOIs
Publication statusPublished - 2009

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Steam
Antarctic regions
precipitable water
water vapor
Global positioning system
GPS
winter
summer
receivers
Antarctica
analysis
Climatology
equatorial regions
climatology
diurnal variations
weather
diurnal variation
surface temperature
climate
availability

Keywords

  • Antarctica
  • GPS observation
  • Precipitable water vapour
  • Terrestrial winds
  • Variability

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Analysis of GPS-sensed atmospheric water vapour variability and its response to the terrestrial winds over Antarctica. / Suparta, Wayan; Ali, Mohd Alauddin Mohd; Yatim, Baharudin; Fraser, Grahame J.

In: Physics and Chemistry of the Earth, Vol. 34, No. 1-2, 2009, p. 72-87.

Research output: Contribution to journalArticle

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