Initial observations of cold surge frequency over Southeast Asia in relation to ENSO-induced anomalies

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Over the Southeast Asian region, strong surges of cold northeasterly winds are common during winter of the southern hemisphere. For these cold surges, the occurrence frequency is known to vary in conjunction with the El Niño-Southern Oscillation (ENSO) phenomenon. This preliminary study looks at the correlation between cold surge frequency (CSF) and two indicators of ENSO-induced anomalies - the Southern Oscillation Index (SOI) and the Oceanic Niño Index (ONI). ENSO events are detected when each of these indices exceed certain anomaly threshold values for a specified prolonged period. These anomaly threshold values (ATSOI and ATONI) are used as conditions for logical filtering. Four unrelated rounds of logical filtering are applied to 20 seasons of data. Correlation values are then calculated. The results show that the CSF has a more significant one-to-one correlation with the anomaly of atmospheric pressure (which is indicated by the SOI) than the anomaly of sea surface temperature (indicated by the ONI). However, the findings suggest that the approach of logical filtering using both anomaly indices (together) is more effective, when observing CSF in relation to ENSO. Also, it is suggested that CSF per normal seasons is in the range of 16 to 17 events during DJF. (These results apply to an area between 110° and 117.5°E along 15°N.)

Original languageEnglish
Title of host publicationInternational Conference on Space Science and Communication, IconSpace
PublisherIEEE Computer Society
Pages453-458
Number of pages6
Volume2015-September
ISBN (Print)9781479919406
DOIs
Publication statusPublished - 29 Sep 2015
Event4th International Conference on Space Science and Communication, IconSpace 2015 - Langkawi, Malaysia
Duration: 10 Aug 201512 Aug 2015

Other

Other4th International Conference on Space Science and Communication, IconSpace 2015
CountryMalaysia
CityLangkawi
Period10/8/1512/8/15

Fingerprint

Southeast Asia
Atmospheric pressure
event
Temperature
Values

Keywords

  • El Niño-Southern Oscillation (ENSO)
  • logical filtering
  • Oceanic Niño Index (ONI)
  • Southeast Asian cold surges
  • Southern Oscillation Index (SOI)

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Communication

Cite this

Shariff, A. R. M., Jit Singh, M. S., Chell, K., Suparta, W., Tangang @ Tajudin Mahmud, F., Salimun, E., ... Islam, M. T. (2015). Initial observations of cold surge frequency over Southeast Asia in relation to ENSO-induced anomalies. In International Conference on Space Science and Communication, IconSpace (Vol. 2015-September, pp. 453-458). [7283773] IEEE Computer Society. https://doi.org/10.1109/IconSpace.2015.7283773

Initial observations of cold surge frequency over Southeast Asia in relation to ENSO-induced anomalies. / Shariff, Ahmad Ridzuan Mohammed; Jit Singh, Mandeep Singh; Chell, Kalaivani; Suparta, Wayan; Tangang @ Tajudin Mahmud, Fredolin; Salimun, Ester; Muhammad, Maszidah; Abdullah, Mardina; Islam, Mohammad Tariqul.

International Conference on Space Science and Communication, IconSpace. Vol. 2015-September IEEE Computer Society, 2015. p. 453-458 7283773.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Shariff, ARM, Jit Singh, MS, Chell, K, Suparta, W, Tangang @ Tajudin Mahmud, F, Salimun, E, Muhammad, M, Abdullah, M & Islam, MT 2015, Initial observations of cold surge frequency over Southeast Asia in relation to ENSO-induced anomalies. in International Conference on Space Science and Communication, IconSpace. vol. 2015-September, 7283773, IEEE Computer Society, pp. 453-458, 4th International Conference on Space Science and Communication, IconSpace 2015, Langkawi, Malaysia, 10/8/15. https://doi.org/10.1109/IconSpace.2015.7283773
Shariff ARM, Jit Singh MS, Chell K, Suparta W, Tangang @ Tajudin Mahmud F, Salimun E et al. Initial observations of cold surge frequency over Southeast Asia in relation to ENSO-induced anomalies. In International Conference on Space Science and Communication, IconSpace. Vol. 2015-September. IEEE Computer Society. 2015. p. 453-458. 7283773 https://doi.org/10.1109/IconSpace.2015.7283773
Shariff, Ahmad Ridzuan Mohammed ; Jit Singh, Mandeep Singh ; Chell, Kalaivani ; Suparta, Wayan ; Tangang @ Tajudin Mahmud, Fredolin ; Salimun, Ester ; Muhammad, Maszidah ; Abdullah, Mardina ; Islam, Mohammad Tariqul. / Initial observations of cold surge frequency over Southeast Asia in relation to ENSO-induced anomalies. International Conference on Space Science and Communication, IconSpace. Vol. 2015-September IEEE Computer Society, 2015. pp. 453-458
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