Variability Of Satellite-Observed Sea Surface Height In The Tropical Indian Ocean: Comparison EOF and Analysis  

Oleh:

Iskandar, Iskhaq

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Makara Seri Sains vol. 13 no. 2 (Nov. 2009), page 173-179.
Topik: Empirical Orthogonal Function; Indian Ocean Dipole; Sea Surface Height; Self Organizing Maps; Southern Oscillation Index

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Perpustakaan Pusat (Semanggi) Nomor Panggil: MM65 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Weekly sea surface height (SSH) in the tropical Indian Ocean (20degreeS - 20degreeN) was analyzed for the period of January 1993-December 2007 using an empirical orthogonal function (EOF) and a self-organizing maps (SOM) analysis. The SOM, on the other hand, characterizes the sea level variability, which shows twenty-five patterns. The patterns with low (high) sea surface height anomaly (SSHA) in the southern (northen) hemisphere associated with the ENSO and or the Indian Ocean Dipole (IOD) events. Low SSHA occupied the western half of the the basin while high SSHA loaded in the eastern basin when the LaNina event is takibg place. The El Nino event is characterized by low SSHA in the northern hemisphere, along the qeuator and along the eastern boundary, while high SSHA in the southwestern part of the basin. The IOD event shows a dipole like pattern with low SSHA in the east and high in the west. When the IOD co-occurred with El Nino, a distinct dipole pattern is clearly observed.

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