Observations of precipitable water vapor along the maritime continent associated with El Niñ-southern oscillation activity

Wayan Suparta

Research output: Contribution to journalArticle

Abstract

The effect of El Niño and La Niña events is a major issue in the regional climate of Southeast Asia. This study uses the Precipitable Water Vapor (PWV) values estimated from Global Navigation Satellite System (GNSS; in particular Global Positioning System, GPS) to investigate the El Niño-Southern Oscillation (ENSO) activity in the Southern coast of the South China Sea (SCS). For this study, GPS and meteorological systems are installed at the Universiti Malaysia Sabah, Kota Kinabalu (UMSK), which is located on the coast of the maritime continent. Subsequently, PWV from GPS and PWV obtained from Radiosonde, prior to the investigation of ENSO activity, are compared. To further investigate the relationship between PWV and ENSO activities, data from three additional GPS stations located along the coast of SCS during the 3-year period 2009-2011 were analyzed. The selection period considers the availability of GPS data. The obtained results show that during the increased intensity of El Niño in 2009/2010, PWV decreases and drops about 10-week later, i.e., after the sea surface temperature anomaly (SSTa) has peaked. PWV has a negative correlation with the El Niño index, which is comparable with precipitation data obtained from NASA’s Tropical Rainfall Measuring Mission (TRMM). In contrast, the amount of PWV was increased during the La Niña event of 2010/2011. This observation suggests the GPS is a suitable technique for studying the ENSO activity.

Original languageEnglish
Article numberRS556
JournalAnnals of Geophysics
Volume61
Issue number5
DOIs
Publication statusPublished - 1 Jan 2018
Externally publishedYes

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Southern Oscillation
precipitable water
continents
Global Positioning System
water vapor
GPS
coasts
GNSS
coast
China
Southeast Asia
Malaysia
satellite navigation systems
radiosondes
sea surface temperature
TRMM
radiosonde
continent
regional climate
temperature anomaly

ASJC Scopus subject areas

  • Geophysics

Cite this

Observations of precipitable water vapor along the maritime continent associated with El Niñ-southern oscillation activity. / Suparta, Wayan.

In: Annals of Geophysics, Vol. 61, No. 5, RS556, 01.01.2018.

Research output: Contribution to journalArticle

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