scholarly journals Development of Wave Model for Inner Bay Area responding to Meteorological Model for Local Area and Typhoon Bogus Model

2008 ◽  
Vol 55 ◽  
pp. 431-435
Author(s):  
Oriaki HASHIMOTO ◽  
Kuniaki MATSUURA ◽  
Yasushi MATSUNAGA ◽  
Hiroyasu KAWAI ◽  
Koji KAWAGUCHI
Keyword(s):  
Wave Model ◽  
Local Area ◽  
Meteorological Model ◽  
Bay Area

scholarly journals Numerical Simulations of Wind Wave Growth under a Coastal Wind Jet through the Kanmon Strait

2008 ◽  
Vol 23 (6) ◽  
pp. 1162-1175 ◽  
Author(s):  
Teruhisa Shimada ◽  
Osamu Isoguchi ◽  
Hiroshi Kawamura
Keyword(s):  
Numerical Simulations ◽  
Wind Wave ◽  
Wave Model ◽  
Strong Wind ◽  
Spatiotemporal Resolution ◽  
Wind Maximum ◽  
Meteorological Model ◽  
Wave Growth ◽  
Wind Speed Maximum ◽  
Wave Region

Abstract The development of a coastal wind jet flowing through the Kanmon Strait and the associated wind wave growth are investigated from a case study on 24–26 July 1999. This study presents a realistic example of fetch-limited wave growth under a developing wind jet outflowing from a terrestrial gap of a coast. A series of numerical simulations are used by one-way coupling between a mesoscale meteorological model and a shallow-water wave model with high spatiotemporal resolutions of 2 km and 1 h. The simulated fields of wind and wave are compared with satellite and in situ observations and it is confirmed that they coincide with observations. A complete picture of the wind jet is obtained from the wind simulations, and wave simulations demonstrate the areal extent of higher waves growing with the development of the wind jet. The wind maximum region is localized and extends downwind. The maximum wave height region is highly localized but located more downwind of the wind speed maximum. The high wave region completely reaches the southern coast of the Korean Peninsula before the strong wind. In the lee of the islands, waves are blocked. The conventional fetch growth of waves holds in waves at the more upwind locations than the highest wave region. The forecasting of localized waves under a coastal wind jet is a case in which adequately high spatiotemporal resolution is required for both the wave simulation and wind input.

Simulation of Weather and Ocean for Numerical Ship Navigation

2011 ◽  
Author(s):  
Taisuke Soda ◽  
Shigeaki Shiotani ◽  
Hidenari Makino ◽  
Yoichi Shimada
Keyword(s):  
High Resolution ◽  
Dead Reckoning ◽  
Wave Model ◽  
Ocean Waves ◽  
Wind Data ◽  
Ship Maneuvering ◽  
Meteorological Model ◽  
Wave Data ◽  
Modeling Group ◽  
Simulated Wind

For safe navigation, high-resolution information on wind and waves is very important. In coastal areas in particular, the weather and ocean situation changes dramatically in time and place according to the effects of geography and water depth. In this paper, high resolution wave data are generated using SWAN [1][2] as a numerical wave model. To estimate waves, wind data is necessary. By using the mesoscale meteorological model of WRF-ARW, detailed wind data was generated. We simulated wind and ocean waves for the duration of a typhoon passing over Japan in September of 2004. Secondly, we simulated ship maneuvering using simulated wind and wave data. For the ship maneuvering model, the MMG (Mathematic Modeling Group) was used. Combining high-resolution wind and wave data with the numerical navigation model, we studied the effects of wind and waves on a ship’s maneuvering. Comparing the simulated rhumb lines of a ship with the dead reckoning tracks, it was recognized that the effects of the wind and waves on a moving ship were significant.

scholarly journals High-resolution wave model validation over the Greek maritime areas

2012 ◽  
Vol 12 (11) ◽  
pp. 3433-3440 ◽  
Author(s):  
N. Mazarakis ◽  
V. Kotroni ◽  
K. Lagouvardos ◽  
L. Bertotti
Keyword(s):  
Large Scale ◽  
Aegean Sea ◽  
Wave Model ◽  
Altimeter Data ◽  
Medium Size ◽  
Simple Task ◽  
Meteorological Model ◽  
Satellite Platform ◽  
Wave Forecast ◽  
Wave Models

Abstract. The increasing maritime activity can be seriously affected by severe weather and sea conditions. To avoid serious damages to ships, marine structures and humans, a good weather and wave forecast is of primary importance. In general the meteorological and the wave models are used to produce forecasts at large scale like the global or the medium-size inner seas. For much smaller environments like the Greek maritime areas, characterized by complicated features like the orography and the presence of islands, the modelisation becomes a not simple task. This study is devoted to the validation of the performance of the WAM wave model over the Ionian and Aegean Seas. The period of validation refers to the first 12 months of operational use of the model at the National Observatory of Athens. The wave model is applied at a resolution of 1/16 degrees and is driven by the 10 m wind, produced by the BOLAM meteorological model operationally run over the same area. Two different sources of data have been used for the verification of the model results. The first dataset is provided by a network of buoys deployed over the Greek maritime areas and the second consists of altimeter data, provided by the OSTM/Jason-2 satellite platform. Although the study area is characterized by complex topography and a large number of islands, the implementation of the WAM model provides very encouraging results. In general, with the exception of the two buoys located in the Ionian Sea, the WAM model tends to underestimate the wave energy in the region of the Aegean Sea. The comparison with the altimeter data shows that the model has a tendency to overestimate the height for waves lower than 2.5 m and to underestimate the waves higher than 3 m.

scholarly journals STORM SURGE SIMULATIONS INCLUDING WAVE-CURRENT INTERACTIONS BASED ON THE 3D NEARSHORE CURRENT MODEL

2018 ◽  
pp. 85
Author(s):  
Hwusub Chun ◽  
Kyungmo Ahn ◽  
Witold Cieslikiewicz
Keyword(s):  
Storm Surge ◽  
Current Model ◽  
Storm Surges ◽  
Wave Model ◽  
Wave Forcing ◽  
Bay Area ◽  
The North ◽  
The Republic ◽  
Wave Induced ◽  
The Waves

This paper presents the numerical simulation of storm surges including wave-current interactions based on the 3D nearshore current model. Newly developed numerical model included new terms on surface stress and wave-induced Reynolds stress. The present nearshore current model calculates nearshore current field under storm surge, the wave forcing terms should be provided by the additional computation on the waves and surface roller. For the wave-current interactions, the present model is dynamically coupled with wind wave model which is modified WAM applicable to shallow water. We conducted storm surge simulations in Youngil-bay located in the east coast of the Republic of Korea. One of the purpose of this simulation is to estimate the influence of large breakwater constructed in the north side of bay entrance on the erosion of beaches located inside bay area during the storm.

A Qualitative Study of Ecstasy Sellers in the San Francisco Bay Area

2004 ◽  
Author(s):  
Sheigla Murphy ◽  
Paloma Sales ◽  
Micheline Duterte ◽  
Camille Jacinto
Keyword(s):  
Qualitative Study ◽  
San Francisco ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
Bay Area

Strathnet—a local area network

1981 ◽  
Vol 1 (1) ◽  
pp. 21 ◽  
Author(s):  
David Hutchison ◽  
Doug Shepherd
Keyword(s):  
Local Area Network ◽  
Local Area ◽  
Area Network

A Local Area Network for Medical Research; Planning, Realization and Experience

1991 ◽  
Vol 30 (01) ◽  
pp. 53-64 ◽  
Author(s):  
R. Schosser ◽  
C. Weiss ◽  
K. Messmer
Keyword(s):  
Medical Research ◽  
Word Processing ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Test Installation ◽  
Cost Performance ◽  
The Public ◽  
On Line ◽  
The University

This report focusses on the planning and realization of an interdisciplinary local area network (LAN) for medical research at the University of Heidelberg. After a detailed requirements analysis, several networks were evaluated by means of a test installation, and a cost-performance analysis was carried out. At present, the LAN connects 45 (IBM-compatible) PCs, several heterogeneous mainframes (IBM, DEC and Siemens) and provides access to the public X.25 network and to wide-area networks for research (EARN, BITNET). The network supports application software that is frequently needed in medical research (word processing, statistics, graphics, literature databases and services, etc.). Compliance with existing “official” (e.g., IEEE 802.3) and “de facto” standards (e.g., PostScript) was considered to be extremely important for the selection of both hardware and software. Customized programs were developed to improve access control, user interface and on-line help. Wide acceptance of the LAN was achieved through extensive education and maintenance facilities, e.g., teaching courses, customized manuals and a hotline service. Since requirements of clinical routine differ substantially from medical research needs, two separate networks (with a gateway in between) are proposed as a solution to optimally satisfy the users’ demands.

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