Low frequency and quasi-biennial oscillations in the Malaysian precipitation anomaly

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19 Citations (Scopus)

Abstract

The spatial and temporal variability of the precipitation anomaly in Malaysia in the quasi-biennial (1.5-2.5 years) and the low-frequency (3-7 years) bands were investigated. The oscillations in both bands contributed a significant proportion of the variance in the precipitation anomally. The most dominant modes for both bands had large impacts on the stations in Sabah, Sarawak and on the east coast of the Malaysian peninsula. These dominant modes had a similar manifestation, i.e. the stations experienced enhanced rainfall during periods of large negative anomaly of sea surface temperature (SST) in the central-eastern Pacific Ocean and suppressed rainfall during periods of large positive SST anomaly. Hence, these areas may face severe drought during an El Nino event and flood during La Nina. Both bands appeared to have large-scale coherence with SST, sea level pressure and zonal wind over the tropical Pacific and Indian Oceans and South China Sea. However, the two signals differed with respect to timing and propagation.

Original languageEnglish
Pages (from-to)1199-1210
Number of pages12
JournalInternational Journal of Climatology
Volume21
Issue number10
DOIs
Publication statusPublished - Aug 2001

Fingerprint

quasi-biennial oscillation
sea surface temperature
anomaly
rainfall
La Nina
sea level pressure
zonal wind
temperature anomaly
El Nino
drought
oscillation
coast
ocean
station

Keywords

  • ENSO
  • EOF
  • Low frequency
  • Malaysian precipitation
  • Quasi-biennial

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

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title = "Low frequency and quasi-biennial oscillations in the Malaysian precipitation anomaly",
abstract = "The spatial and temporal variability of the precipitation anomaly in Malaysia in the quasi-biennial (1.5-2.5 years) and the low-frequency (3-7 years) bands were investigated. The oscillations in both bands contributed a significant proportion of the variance in the precipitation anomally. The most dominant modes for both bands had large impacts on the stations in Sabah, Sarawak and on the east coast of the Malaysian peninsula. These dominant modes had a similar manifestation, i.e. the stations experienced enhanced rainfall during periods of large negative anomaly of sea surface temperature (SST) in the central-eastern Pacific Ocean and suppressed rainfall during periods of large positive SST anomaly. Hence, these areas may face severe drought during an El Nino event and flood during La Nina. Both bands appeared to have large-scale coherence with SST, sea level pressure and zonal wind over the tropical Pacific and Indian Oceans and South China Sea. However, the two signals differed with respect to timing and propagation.",
keywords = "ENSO, EOF, Low frequency, Malaysian precipitation, Quasi-biennial",
author = "{Tangang @ Tajudin Mahmud}, Fredolin",
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AU - Tangang @ Tajudin Mahmud, Fredolin

PY - 2001/8

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N2 - The spatial and temporal variability of the precipitation anomaly in Malaysia in the quasi-biennial (1.5-2.5 years) and the low-frequency (3-7 years) bands were investigated. The oscillations in both bands contributed a significant proportion of the variance in the precipitation anomally. The most dominant modes for both bands had large impacts on the stations in Sabah, Sarawak and on the east coast of the Malaysian peninsula. These dominant modes had a similar manifestation, i.e. the stations experienced enhanced rainfall during periods of large negative anomaly of sea surface temperature (SST) in the central-eastern Pacific Ocean and suppressed rainfall during periods of large positive SST anomaly. Hence, these areas may face severe drought during an El Nino event and flood during La Nina. Both bands appeared to have large-scale coherence with SST, sea level pressure and zonal wind over the tropical Pacific and Indian Oceans and South China Sea. However, the two signals differed with respect to timing and propagation.

AB - The spatial and temporal variability of the precipitation anomaly in Malaysia in the quasi-biennial (1.5-2.5 years) and the low-frequency (3-7 years) bands were investigated. The oscillations in both bands contributed a significant proportion of the variance in the precipitation anomally. The most dominant modes for both bands had large impacts on the stations in Sabah, Sarawak and on the east coast of the Malaysian peninsula. These dominant modes had a similar manifestation, i.e. the stations experienced enhanced rainfall during periods of large negative anomaly of sea surface temperature (SST) in the central-eastern Pacific Ocean and suppressed rainfall during periods of large positive SST anomaly. Hence, these areas may face severe drought during an El Nino event and flood during La Nina. Both bands appeared to have large-scale coherence with SST, sea level pressure and zonal wind over the tropical Pacific and Indian Oceans and South China Sea. However, the two signals differed with respect to timing and propagation.

KW - ENSO

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KW - Quasi-biennial

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