Differential impacts of conventional El Niño versus El Niño Modoki on Malaysian rainfall anomaly during winter monsoon

Ester Salimun, Fredolin Tangang @ Tajudin Mahmud, Ju Neng Liew, Swadhin K. Behera, Weidong Yu

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

This study investigates distinct impacts of conventional El Niño and El Niño Modoki on Malaysian rainfall anomaly during the winter monsoon. Generally, during conventional El Niños, northern Borneo experiences significant rainfall deficit while over Peninsular Malaysia the impact is minimal. In contrast, most El Niño Modoki events favour deficit rainfall over both northern Borneo and Peninsular Malaysia. The level of impacts, particularly over northern Borneo, is higher during El Niño Modoki than conventional El Niño. The different patterns of anomalous rainfall distribution during the two types of El Niño are associated with differences in regional sea surface temperature anomalies, anomalous regional circulation and the different patterns of ascending and descending air associated with the nodes of Walker circulation over this region. However, the most prominent change is the weakening and westward shifting of the anti-cyclonic circulation over the western North Pacific region.

Original languageEnglish
Pages (from-to)2763-2774
Number of pages12
JournalInternational Journal of Climatology
Volume34
Issue number8
DOIs
Publication statusPublished - 30 Jun 2014

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monsoon
anomaly
rainfall
winter
Walker circulation
temperature anomaly
sea surface temperature
air

Keywords

  • Anomalous rainfall
  • Conventional El Niño
  • El Niño Modoki
  • Northern Borneo
  • Peninsular Malaysia

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Differential impacts of conventional El Niño versus El Niño Modoki on Malaysian rainfall anomaly during winter monsoon. / Salimun, Ester; Tangang @ Tajudin Mahmud, Fredolin; Liew, Ju Neng; Behera, Swadhin K.; Yu, Weidong.

In: International Journal of Climatology, Vol. 34, No. 8, 30.06.2014, p. 2763-2774.

Research output: Contribution to journalArticle

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abstract = "This study investigates distinct impacts of conventional El Ni{\~n}o and El Ni{\~n}o Modoki on Malaysian rainfall anomaly during the winter monsoon. Generally, during conventional El Ni{\~n}os, northern Borneo experiences significant rainfall deficit while over Peninsular Malaysia the impact is minimal. In contrast, most El Ni{\~n}o Modoki events favour deficit rainfall over both northern Borneo and Peninsular Malaysia. The level of impacts, particularly over northern Borneo, is higher during El Ni{\~n}o Modoki than conventional El Ni{\~n}o. The different patterns of anomalous rainfall distribution during the two types of El Ni{\~n}o are associated with differences in regional sea surface temperature anomalies, anomalous regional circulation and the different patterns of ascending and descending air associated with the nodes of Walker circulation over this region. However, the most prominent change is the weakening and westward shifting of the anti-cyclonic circulation over the western North Pacific region.",
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