Dynamical features of GPS PWV variation associated with lightning activity

Wayan Suparta, Ja’afar Adnan, Mohd Alauddin Mohd. Ali

Research output: Contribution to journalArticle

Abstract

Water vapour is one component that causes spatial and temporal fluctuations in the lower atmosphere, which, in turn, introduce time delays into the global positioning system (GPS) signal. These delays can be exploited to estimate the precipitable water vapour (PWV), which is beneficial for meteorological applications. Because the vertical transfer of warm air to the troposphere triggers instability and atmospheric charges, lightning phenomena can fundamentally affect the GPS signals through changes in water vapour. From this hypothesis, GPS-derived PWV data have been proposed as a tool for monitoring lightning activity. In this paper, the variation of PWV in days with lightning at four selected stations in Peninsular Malaysia during the past two inter-monsoon events in May and November 2009 was observed. To verify the response, a peak alignment method was proposed with regard to the lightning with more than 100 discharge events and lightning days from 07:00 to 20:00 LT. A total of 66 lightning series were assessed, and PWV was observed to increase by approximately 2.46 mm and decrease by 4.16 mm before and after the peak point, respectively, when compared to fair-weather conditions. Approximately 62% of the lightning start times were concentrated within a period of less than 1 h before or after the PWV reached a maximum peak, 24% were observed between 1–2 h, and 14% started after 2 h. This trend implies that the use of GPS PWV data was more consistent and robust for the detection of lightning activity compared to the use of surface temperature and relative humidity data.

Original languageEnglish
Pages (from-to)1376-1390
Number of pages15
JournalInternational Journal of Remote Sensing
Volume37
Issue number6
DOIs
Publication statusPublished - 18 Mar 2016

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precipitable water
lightning
water vapor
GPS
relative humidity
troposphere
monsoon
surface temperature
atmosphere
air
monitoring

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

Dynamical features of GPS PWV variation associated with lightning activity. / Suparta, Wayan; Adnan, Ja’afar; Mohd. Ali, Mohd Alauddin.

In: International Journal of Remote Sensing, Vol. 37, No. 6, 18.03.2016, p. 1376-1390.

Research output: Contribution to journalArticle

Suparta, Wayan ; Adnan, Ja’afar ; Mohd. Ali, Mohd Alauddin. / Dynamical features of GPS PWV variation associated with lightning activity. In: International Journal of Remote Sensing. 2016 ; Vol. 37, No. 6. pp. 1376-1390.
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