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Spatial temporal variability of sea surface height (SSH) anomaly at the Indonesian Throughflow (ITF) pathways was investigated through the response to semi-annual to decadal climate phenomena. Satellite altimetry data from AVISO covering 1993 to 2015 period were used and signal analysis was performed to separate dominant spectrum for selected locations. It is found that the dominant feature of the ITF variability is the seasonal signal. SSH increases during west monsoon and decreases during east monsoon. The strongest increase of SSH occurs during strong La Niña, while the strongest decrease of SSH takes place during El Niño. The distribution of SSHA shows strong variations in latitude and longitude in response to changes in upper layer water. Decadal variations also influence the effect of seasonal variations.
Dr Radjawane is a lecturer and researcher in physical oceanography at the Faculty of Earth Sciences and Technology, Bandung Institute of Technology, Indonesia. She was awarded a PhD in Physical Oceanography and Environmental Modelling from Tokyo University of Marine Sciences and Technology (formerly Tokyo University of Fisheries), Japan, in 2001. Her research interests include dynamic of tropical climate variability, climate change impact on marine systems, dynamic of ocean circulations.