Influence of El Niño southern oscillation on precipitation variability in Northeast Thailand
Journal article
Authors/Editors
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Publication Details
Author list: Chueasa B., Humphries U.W., Waqas M.
Publisher: Elsevier
Publication year: 2024
Volume number: 13
Start page: 1
End page: 13
Number of pages: 13
ISSN: 22150161
eISSN: 2215-0161
Languages: English-Great Britain (EN-GB)
Abstract
This study investigates the influence of El Niño Southern Oscillation (ENSO) on monthly precipitation anomaly (PPTA) in Northeast Thailand using 30 years (1993–2022) data obtained from 27 weather stations of the Thai Meteorological Department (TMD). Pearson correlation analysis elucidates the relationship between ENSO indices and PPTA. Results reveal significant correlations between ENSO indices and PPTA, providing insights into their intricate relationship. La Niña events have a stronger relationship with PPTA than El Niño events, with notable correlations observed. • Strong La Niña phases, PPTA tends to increase across Northeast Thailand when Niño 3, 3.4, and 4 are more strongly negative -0.64, -0.50, and -0.65, respectively. These correlations provide valuable insights into the hydrological influence of ENSO in Thailand. • After the ENSO event, there appears to be a 4–5 month lag period from the impact on PPTA that shows a higher correlation. • Wavelet transform coherence (WTC) analysis dissects the temporal and frequency-specific nature of the relationship between ENSO and PPTA found during the frequency of 2–7 years. These findings underscore the importance of studying regional variations in ENSO impacts for PPTA in Northeast Thailand. © 2024 The Authors
Keywords
Climate changeENSOCorrelationWavelet transformationContinuous wavelet transformationWavelet Coherence
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