Anomaly technique for expression the Indian Ocean Dipole in South Java Sea


  • Aida Sartimbul
  • Erfan Rohadi
  • Mochammad Firdaus Ali
  • Zulfan Khaidar





Anomaly, Average, Climate change, SST, Time series


The longer period of time series of anomaly data was usually used to express the climatic phenomena. Even it is common, however, there were limited study discusses how powerful anomaly technique for understanding the climatic phenomena that occur in the period of time.  The objective of this study is to understand the nature of anomaly, to identify an unusual fluctuation of data, and to detect the climate change impact to the Sea Surface Temperature (SST). The eleven years satellite Aqua Modis data and Dipole Mode Index were applied to this study.  The raw data were averaged and removed seasonal trend using anomaly technique and then plotted to both MS Excel and Surfer ver. 6. The result shows that the monthly average of SST was indicated a seasonal/ sinusoidal pattern. Furthermore, anomaly analysis provides an unusual SST trend that has a direct impact on the climatic phenomenon as Indian Ocean Dipole. It is suggested that an anomaly technique may provide a good tool for expression unusual phenomena due to climate change.




[1] Talley LD, Pickard GL, Emery WJ, Swift JH, Descriptive Physical Oceanography: An Introduction, Elsevier, (2011), pp:152-153.

[2] Sartimbul A, Nakata H, Rohadi E, Yusuf B, Kadarisman HP, “Variations in chlorophyll-a concentration and the impact on Sardinella lemuru catches in Bali Strait, Indonesiaâ€, Progress in Oceanography, Vol.87, (2010), 168–174, available online: Doi:10.1016/j-pocean.2010.09.002.

[3] Chai W, Santoso A, Wang G, Yeh SW, An SI, Cobb KM, Collins M, Guilyardi E, Jin FF, Kug JS, Lengaigne M, McPhaden MJ, Takahashi K, Timmermaan A, Vecchi G, Watanabe M, Wu L, “ENSO and greenhouse warmingâ€, Nature Climate Change, (2015), pp.849-859, available online: change. DOI: 10.1038/NCLIMATE2743

[4] Arleston J, Yuli E, Sartimbul A, “Dynamics of Indian Scad Fish (Decapterus spp.) cathing linked with temperature variation due to ENSO phenomenon in Bali Straitâ€, International Journal of ChemTech Research. Vol.9, No.9, (2016), pp.237-246, http://www.

[5] Sartimbul A, Rohadi E, Yona D, Yuli HE, Sambah AB, Arleston J, “Change in species composition and its implication on climate variation in Bali Strait: case study in 2006 and 2010â€, International Journal on Survey in Fisheries Science.Vol.4, No.2, (2018), pp.38-46.

[6] Saji NH, Goswami BN, Vinayachandran PN.,Yamagata T. “A dipole mode in the Tropical Indian Oceanâ€, Nature. Vol.401, (1999), pp.360-363

[7] Webster PJ, More AM, Loschnigg JP, Leban RR, “Coupled ocean-atmosphere dynamics in the Indian Ocean during 1997-98â€. Nature, Vol.403, (1999), pp.356-360.

[8] Qu T, Du Y, Strachan J, Meyers G, Slingo J, “Sea Surface Temperature and its variability in the Indonesia region“. Oceanography. Vol.18, No.4, (2005), pp.50-61.

[9] NOAA, Cold and Warm episodes by season. Accessed online on on November 15th, 2018.

[10] Cai, W. et al. Increased frequency of extreme Indian Ocean Dipole events due to greenhouse warming. Nature 510, 254–258 (2014).

View Full Article:

How to Cite

Sartimbul, A., Rohadi, E., Firdaus Ali, M., & Khaidar, Z. (2018). Anomaly technique for expression the Indian Ocean Dipole in South Java Sea. International Journal of Engineering & Technology, 7(4.44), 28–30.
Received 2019-01-31
Accepted 2019-01-31
Published 2018-12-01