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VOL. 10, ISSUE 2 (2025)
Seasonal variability of sea surface temperature in surabaya, Gresik and Bangkalan waters in neutral phase
Authors
Supriyatno Widagdo, Bambang Semedi, dan Muhammad Firdaus
Abstract
The study was conducted with the aim of
analysing the seasonal sea surface temperature (SST) characteristics in SGB
waters during the neutral phase, when El Niño and La Niña are not occurring.
Data were processed using Ocean Data View and analysed through descriptive
statistics and cluster analysis. The results showed that the Madura Strait has
seasonal sea surface temperature variability that is strongly influenced by the
monsoon system. Sea surface temperature fluctuations form a bimodal pattern,
with the narrow and shallow western side relatively warm throughout the season
compared to the eastern side of the sea waters which are relatively wide, deep
and open to the ocean. The eastern season is a cold period in the waters of all
three loci with SSTs of ~30.05 oC. The SST distribution pattern shows that the
deep areas of the strait are relatively warmer compared to the waters of the
northern side of the strait. The western season with an average SST of 31.17°C
has a strong seasonal segregation from Bangkalan to Surabaya waters with SST
values of 31.60°C, 31.20°C and 30.70°C respectively. The western season is also
characterised by the largest SST range difference of 0.90 oC. SST segregation
still occurs in the early spring with a decreasing gradient of 0.20 oC from
Bangkalan to Surabaya with an average SST of 31.40 oC. The eastern season which
has an average SST of 30.90 oC with a range of 30.90-31.00 oC marks the coldest
period of the season. The late transitional period is characterised by the
highest average SST throughout the season at 31.57 oC in addition to being
characterised by the smallest SST range at 0.10 oC. Spatially, Surabaya SST has
similar characteristics with Gresik SST compared to Bangkalan SST.
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Pages:1-7
How to cite this article:
Supriyatno Widagdo, Bambang Semedi, dan Muhammad Firdaus "Seasonal variability of sea surface temperature in surabaya, Gresik and Bangkalan waters in neutral phase". International Journal of Fisheries and Aquatic Research, Vol 10, Issue 2, 2025, Pages 1-7
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