ORCID Profile
0000-0003-3637-2351
Current Organisations
Universitas Syiah Kuala
,
Universität Hamburg
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Publisher: IOP Publishing
Date: 11-2019
DOI: 10.1088/1755-1315/348/1/012096
Abstract: This study aims to observe tidal sea behavior in Bay of Sabang by using a two-dimensional hydrodynamic model. The research domain was obtained from SRTM15, which had been interpolated so that it has a spatial resolution Δx = Δy = 0.1 minutes (185 meters). As a generator force, the open boundaries model is given five main tidal components (M2, S2, K1, N2, O1) obtained from TPXO 7.2 data. The model is simulated for 31 days with time step based on CFL condition criteria. Our model verification is quite good when compared with TMD prediction data (r = 0.9996). It shows that our model can be used for tidal hydrodynamics studies in Bay of Sabang. The results show that tides in Bay of Sabang are predominantly mixed prevailing semi-diurnal (F = 0.857). The speed of tidal currents in Bay of Sabang is quite small both for spring and neap tides. The difference in velocity between spring and neap tides reaches 0.6 cm/s.
Publisher: IOP Publishing
Date: 11-2019
DOI: 10.1088/1755-1315/348/1/012063
Abstract: Eddies have an important role in momentum transport, water mass, heat, and marine biogeochemical cycles. So far the information regarding eddies in the Andaman Sea is still little known. By using National Centers for Environmental Prediction (NCEP) / National Center for Atmospheric Research (NCAR) wind data, Sea Surface Height (SSH), and geostrophic currents obtained from altimeter data, this paper aimed to detect eddies during April (intermonsoon). Eddies were formed by current turbulence, gradient pressure variations, and the influence of sea surface wind. Observations showed that the SSH variations was supported by the west wind from the Andaman Sea. Spatial SSH differences caused the dynamics of geostrophic currents and eddies. During April 2008, we found six eddies scattered around the Andaman Sea, where there were four eddies cyclones and two eddies anticyclones.
Publisher: IOP Publishing
Date: 20-12-2018
Publisher: IOP Publishing
Date: 11-2019
DOI: 10.1088/1755-1315/348/1/012094
Abstract: Sabang Waters is located in the Aceh Province, Indonesia, directly adjacent to the Andaman Sea which is dominated by the influence of the monsoon wind. Sabang Waters is a strategic area and one of the zones of coral reef ecosystems in Indonesia. Hydrodynamics in Sabang waters is studied to support the management of Sabang Waters in the future. The motivation of this research is as a preliminary study of wind-driven circulation in Sabang Waters. The method applied is a 2D numerical model simulation with 6-hourly wind data during January - March 2019. The results of the simulation of ocean currents are verified by monthly surface wind conditions. Based on current analysis during January - March 2019, wind-driven circulation in Sabang Waters is quite weak, especially in the Sabang Bay. The flow looks a little stronger in the northeastern part of Sabang Waters especially during January (3 ms −1 ).
Publisher: Elsevier BV
Date: 02-2010
Publisher: IOP Publishing
Date: 20-12-2018
Publisher: IOP Publishing
Date: 11-2019
DOI: 10.1088/1755-1315/348/1/012066
Abstract: The western part of Aceh waters is part of the eastern Indian Ocean. This waters is a dynamic region where there is differences in sea surface temperature (SST) and significant chlorophyll a concentrations between the southwest (SW) monsoon (June-September) and the northeast (NE) monsoon (December-February). Analysis of SST and chlorophyll-a concentration were used to determine upwelling events in the region. We found that SST in the NE monsoon is lower than that of in the SW monsoon.
No related grants have been discovered for Syamsul Rizal.