Welcome to American Journal of Marine Science

American Journal of Marine Science is a peer-reviewed, open access journal that provides rapid publication of articles in all areas of marine science. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of marine science.

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Article

Impact of the Tropical Cyclonic Storm ‘Hudhud’ on Northeast Coastal Waters of Visakhapatnam

1Department of Marine Living Resources, Andhra University, Visakhapatnam, Andhra Pradesh, India

2Department of Zoology, Andhra University, Visakhapatnam, Andhra Pradesh, India


American Journal of Marine Science. 2014, 2(3), 63-66
doi: 10.12691/marine-2-3-4
Copyright © 2014 Science and Education Publishing

Cite this paper:
K. Ramesh Babu, T. Joseph Uday Ranjan, K. V. Siva Reddy, M. Ratna Raju. Impact of the Tropical Cyclonic Storm ‘Hudhud’ on Northeast Coastal Waters of Visakhapatnam. American Journal of Marine Science. 2014; 2(3):63-66. doi: 10.12691/marine-2-3-4.

Correspondence to: T.  Joseph Uday Ranjan, Department of Marine Living Resources, Andhra University, Visakhapatnam, Andhra Pradesh, India. Email: ranjan.uday@gmail.com

Abstract

Large-scale tropical cyclones, such as tropical storms and hurricanes, can generate both short and long-term disturbances in estuarine systems. The main objective of the present study was to explore and elevate the impact of Hudhud cyclone at three stations of coastal waters along the coast of Visakhapatnam. The physicochemical characteristics of the coastal water vary with pre and post Hudhud cyclone phase. Significant fluctuations were noticed among the hydrographical parameters like salinity, dissolved oxygen, chemical oxygen demand and along with that inorganic nutrients were also enriched during post cyclone event. Collectively, these results demonstrate that storm water runoff from the domestic and sewage drains negatively impacts coastal water quality, both in the surf zone and offshore. However, the extent of this impact and its human health significance is influenced by numerous factors, including prevailing ocean currents, within-plume processing of particles and pathogens and the timing, magnitude and nature of runoff discharged from river outlets over the course of a storm.

Keywords

References

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Article

Surface Roughness and Deformation Effects on the Behaviour of a Magnetic Fluid Based Squeeze Film in Rotating Curved Porous Circular Plates

1Birla Vishvakarma Mahavidyalaya Engineering College, Vallabh Vidyanagar, Anand, Gujarat (India)

2Department of Mathematics, Sardar Patel University, Vallabh Vidyanagar, Anand, Gujarat (India)


American Journal of Marine Science. 2015, 3(1), 1-10
doi: 10.12691/marine-3-1-1
Copyright © 2015 Science and Education Publishing

Cite this paper:
M. E. Shimpi, G. M. Deheri. Surface Roughness and Deformation Effects on the Behaviour of a Magnetic Fluid Based Squeeze Film in Rotating Curved Porous Circular Plates. American Journal of Marine Science. 2015; 3(1):1-10. doi: 10.12691/marine-3-1-1.

Correspondence to: M.  E. Shimpi, Birla Vishvakarma Mahavidyalaya Engineering College, Vallabh Vidyanagar, Anand, Gujarat (India). Email: mukesh.shimpi@ gmail.com,

Abstract

The combined effect of surface roughness and bearing deformation on the magnetic fluid lubrication of a squeeze film between two rotating transversely rough porous circular plates has been investigated. The results indicate that the bearing performance gets adversely affected by the surface roughness, bearing deformation combination, even if, a magnetic fluid has been considered as the lubricant. However, the negatively skewed roughness introduces a better performance for a good range of deformation by suitably choosing the curvature parameters. It is appealing to note that, although there are several factors bringing down the load carrying capacity, still the bearing can support a good amount of load even when there is no flow unlike, the case of conventional lubricants. In addition, this article also emphasizes the role of rotation for improving the bearing performance.

Keywords

References

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Article

Simulation of Track and Landfall of Tropical Cyclone Viyaru and Its Associated Strom Surges Using NWP Models

1Bangladesh Meteorological Department, Agargaon, Dhaka, Bangladesh

2SAARC Meteorological Research Centre (SMRC), Dhaka, Bangladesh

3Department of Physics, Jahangirnagar University, Savar, Dhaka, Bangladesh


American Journal of Marine Science. 2015, 3(1), 11-21
doi: 10.12691/marine-3-1-2
Copyright © 2015 Science and Education Publishing

Cite this paper:
M. A. K. Mallik, M. N. Ahasan, M. A. M. Chowdhury. Simulation of Track and Landfall of Tropical Cyclone Viyaru and Its Associated Strom Surges Using NWP Models. American Journal of Marine Science. 2015; 3(1):11-21. doi: 10.12691/marine-3-1-2.

Correspondence to: M.  A. K. Mallik, Bangladesh Meteorological Department, Agargaon, Dhaka, Bangladesh. Email: mallikak76@yahoo.com

Abstract

Simulation of track and landfall of the tropical cyclone Viyaru that formed over the southern Bay of Bengal during 11-16 May 2013 has been carried out using Weather Research and Forecasting (WRF) and MRI model. The WRF model was run in a single domain of 9 km horizontal resolution using KF cumulus parameterization schemes, WSM6 micro physics and YSU planetary boundary layer scheme. The model was run for 24, 48, 72 and 96 hrs using NCEP FNL initial and lateral boundary condition. The model has successfully predicted the tracks, re-curvature, areas and time of landfall of the selected tropical cyclone Viyaru. Even in the 96 hrs predictions the model has successfully predicted with reasonable accuracy. The lowest position error was found only 56 km and lowest time error was found 01 hour. The results clearly demonstrate that the track prediction error increases as the forecast hours increases except 24 hrs simulation. However, these results show the advantage of using WRF model with high resolution in prediction of the selected tropical cyclone Viyaru over the Bay of Bengal. Model simulated track was compared with that of BMD observed track and found that the model has captured the track in reasonably well. The storm surges and maximum tide was also simulated by MRI model at the time of landfall of Viyaru and compared with the BMD’s and Inland Waterways Transport Authority’s (BIWTA) estimated storm surges and maximum tide data. It is found that the model has also simulated the storm surges and maximum tide due to Viyaru in 24-hrs advance of landfall time.

Keywords

References

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