Monitoring of GPS water vapor variability during ENSO events over the Borneo region

Wayan Suparta, Ahmad Iskandar

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The cycle of El Nino-Southern Oscillation (ENSO) is very crucial to affect the natural climate variability in a particular region. Direct measurement of ENSO cycle and to understand their comprehensive physical mechanism are still difficult for sustainable development. For that purpose, a Precipitable Water Vapor (PWV) derived from a ground-based Global Positioning System (GPS) receiver is proposed. The PWV for the year 2011 gathered from Universiti Malaysia Sabah located in Kota Kinabalu, Malaysia (UMSK) together with two other selected GPS stations centered the Borneo region in pathways of Nino 4 region, named Nanyang Technological University (NTUS) in the Singapore and Manila Observatory (PIMO) in Philippines were analyzed. The GPS PWV was also compared with PWV taken from Radiosonde (RS). The results found a good agreement between GPS PWV and RS PWV with correlation coefficients ranging from 0.6 to 0.8, significantly at the 99% confidence level. PWV at Philippine's station demonstrated a drop about 7.8 mm before the first monsoon and PWV in the whole station look like a bimodal pattern throughout the year. An investigation of ENSO episode in September with weak-to-moderate intensity between PWV and the sea-surface temperature anomaly demonstrated an inverse correlation due to La Nina events. This promising result indicates that during the La Nina event, the PWV is increased when the sea-surface temperatures getting cold and thereby slow down the GPS signals.

Original languageEnglish
Pages (from-to)88-95
Number of pages8
JournalAsian Journal of Earth Sciences
Volume5
Issue number3
DOIs
Publication statusPublished - 2012

Fingerprint

precipitable water
global positioning systems
El Nino
Borneo
water vapor
El Nino-Southern Oscillation
GPS
monitoring
La Nina
radiosonde
Philippines
Malaysia
surface temperature
sea surface temperature
Singapore
sustainable development
temperature anomaly
monsoon
observatory
climate

Keywords

  • Borneo region
  • El Niño-southern oscillation
  • Global positioning system
  • Precipitable water vapor
  • Sea surface temperature anomaly

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Earth and Planetary Sciences(all)
  • Ecology

Cite this

Monitoring of GPS water vapor variability during ENSO events over the Borneo region. / Suparta, Wayan; Iskandar, Ahmad.

In: Asian Journal of Earth Sciences, Vol. 5, No. 3, 2012, p. 88-95.

Research output: Contribution to journalArticle

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