A new technique to observe ENSO activity via ground-based GPS receivers

Wayan Suparta, Ahmad Iskandar, Mandeep Singh Jit Singh

Research output: Contribution to journalArticle

Abstract

In an attempt to study the effects of global climate change in the tropics for improving global climate model, this paper aims to detect the ENSO events, especially El Nino phase by using ground-based GPS receivers. Precipitable water vapor (PWV) obtained from the Global Positioning System (GPS) Meteorology measurements in line with the sea surface temperature anomaly (SSTa) are used to connect their response to El Niño activity. The data gathered from four selected stations over the Southeast Asia, namely PIMO (Philippines), KUAL (Malaysia), NTUS (Singapore) and BAKO (Indonesia) for the year of 2009/2010 were processed. A strong correlation was observed for PIMO station with a correlation coefficient of −0.90, significantly at the 99% confidence level. In general, the relationship between GPS PWV and SSTa at all stations on a weekly basis showed with a negative correlation. The negative correlation indicates that during the El Niño event, the PWV variation was in decreased trend. Decreased trend of PWV value is caused by a dry season that affected the GPS signals in the ocean-atmospheric coupling. Based on these promising results, we can propose that the groundbased GPS receiver is capable used to monitor ENSO activity and this is a new prospective method that previously unexplored.

Original languageEnglish
Pages (from-to)173-186
Number of pages14
JournalSpringer Series in Materials Science
Volume204
DOIs
Publication statusPublished - 2015

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Steam
Global positioning system
Water vapor
Climate models
Tropics
Meteorology
Climate change
Temperature

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

A new technique to observe ENSO activity via ground-based GPS receivers. / Suparta, Wayan; Iskandar, Ahmad; Jit Singh, Mandeep Singh.

In: Springer Series in Materials Science, Vol. 204, 2015, p. 173-186.

Research output: Contribution to journalArticle

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abstract = "In an attempt to study the effects of global climate change in the tropics for improving global climate model, this paper aims to detect the ENSO events, especially El Nino phase by using ground-based GPS receivers. Precipitable water vapor (PWV) obtained from the Global Positioning System (GPS) Meteorology measurements in line with the sea surface temperature anomaly (SSTa) are used to connect their response to El Ni{\~n}o activity. The data gathered from four selected stations over the Southeast Asia, namely PIMO (Philippines), KUAL (Malaysia), NTUS (Singapore) and BAKO (Indonesia) for the year of 2009/2010 were processed. A strong correlation was observed for PIMO station with a correlation coefficient of −0.90, significantly at the 99{\%} confidence level. In general, the relationship between GPS PWV and SSTa at all stations on a weekly basis showed with a negative correlation. The negative correlation indicates that during the El Ni{\~n}o event, the PWV variation was in decreased trend. Decreased trend of PWV value is caused by a dry season that affected the GPS signals in the ocean-atmospheric coupling. Based on these promising results, we can propose that the groundbased GPS receiver is capable used to monitor ENSO activity and this is a new prospective method that previously unexplored.",
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