scholarly journals Studi Batimetri dan Pasang Surut Di Kawasan Perairan Batu Burung Kota Singkawang Selatan Kalimantan Barat

2020 ◽  
Vol 2 (3) ◽  
pp. 144
Author(s):  
Syam Syamsudin ◽  
Arie Antasari Kushadiwijayanto ◽  
Risko Risko
Keyword(s):  
Diurnal Tides

Pantai Batu Burung yang terletak di Desa Sedau Kota Singkawang Selatan Kalimantan Barat yang merupakan salah satu kawasan pariwisata, tempat mencari ikan, dan sarana transportasi air. Oleh sebab itu, informasi terkait kondisi hidrografi perairan ini sangat penting dalam menunjang aktivitas, pemanfaatan, dan pembangunan Pantai Batu Burung. Penelitian ini bertujuan untuk mengkaji kondisi kedalaman (batimetri) dan pasang surut. Survei lapangan dilakukan Batu Burung pada bulan Juni 2018. Pengukuran kedalaman dilakukan menggunakan Ecohosounder Garmin Gps Map 585, dan pasang surut menggunakan palm pasut selama 15 hari. Hasil pengukuran kedalaman menunjukkan bahwa kedalaman di Pantai Batu Burung memiliki kisaran sebesar 2-6 meter. Berdasarkan klasifikasi lereng, kondisi topografi di daerah ini termasuk dalam katagori landai. Tipe pasang surut di Pantai Batu Burung, berdasarkan bilangan formzahl adalah campuran condong harian ganda ( mixed mainly semi diurnal tides). Komponen pasang surut yang paling dominan adalah M2 dengan nilai amplitudo -0,29 m. Amplitudo komponen K1, O1, dan S2, secara berurutan adalah -0,24, 0,18 m dan 0,09 m.

scholarly journals Coordinated radar observations of atmospheric diurnal tides in equatorial regions

1999 ◽  
Vol 51 (7-8) ◽  
pp. 579-592 ◽  
Author(s):  
Toshitaka Tsuda ◽  
Kazunori Ohnishi ◽  
Fusako Isoda ◽  
Takuji Nakamura ◽  
Robert A. Vincent ◽  
...  
Keyword(s):  
Radar Observations ◽  
Diurnal Tides

scholarly journals On the tides and resonances of Hudson Bay and Hudson Strait

Ocean Science ◽  
2014 ◽  
Vol 10 (3) ◽  
pp. 411-426 ◽  
Author(s):  
D. J. Webb
Keyword(s):  
Numerical Model ◽  
Shallow Water ◽  
World Ocean ◽  
Tidal Energy ◽  
Tidal Range ◽  
Hudson Bay ◽  
Foxe Basin ◽  
Important Region ◽  
The World ◽  
Diurnal Tides

Abstract. The resonances of Hudson Bay, Foxe Basin and Hudson Strait are investigated using a linear shallow water numerical model. The region is of particular interest because it is the most important region of the world ocean for dissipating tidal energy. The model shows that the semi-diurnal tides of the region are dominated by four nearby overlapping resonances. It shows that these not only affect Ungava Bay, a region of extreme tidal range, but they also extend far into Foxe Basin and Hudson Bay and appear to be affected by the geometry of those regions. The results also indicate that it is the four resonances acting together which make the region such an important area for dissipating tidal energy.

scholarly journals COMPUTER CONTROL AND DATA ACQUISITION OF A TIDAL MODEL

1972 ◽  
Vol 1 (13) ◽  
pp. 133
Author(s):  
E.R. Funke
Keyword(s):  
Data Acquisition ◽  
Mechanical Engineering ◽  
Computer Control ◽  
Feedback Controller ◽  
Adaptive Feedback ◽  
Tidal Model ◽  
Computer Based ◽  
And Control ◽  
St Lawrence River ◽  
Diurnal Tides

A large tidal model of the St. Lawrence River covering the region from Montreal to lie du Bic is connected directly to a mini computer for data acquisition and control of the tidal boundary. Some of the more important concepts for the design and operation of a computer based system for this application are described. Details of an adaptive feedback controller for diurnal tides are given. A 16 mm film (N.R.C.-Division of Mechanical Engineering, film no. HYP 620, same title) describes the instrumentation and operation of the model. A report (N.R.C.-Division of Mechanical Engineering, Report No. MH-110, same title) provides further details of this system.

scholarly journals An improved parameterization of tidal mixing for ocean models

2014 ◽  
Vol 7 (1) ◽  
pp. 211-224 ◽  
Author(s):  
A. Schmittner ◽  
G. D. Egbert
Keyword(s):  
Climate Model ◽  
Global Climate ◽  
Global Climate Model ◽  
Deep Ocean ◽  
Meridional Overturning Circulation ◽  
Tidal Mixing ◽  
Overturning Circulation ◽  
Microstructure Measurements ◽  
High Resolution Bathymetry ◽  
Diurnal Tides

Abstract. Two modifications to an existing scheme of tidal mixing are implemented in the coarse resolution ocean component of a global climate model. First, the vertical distribution of energy flux out of the barotropic tide is determined using high resolution bathymetry. This shifts the levels of mixing higher up in the water column and leads to a stronger mid-depth meridional overturning circulation in the model. Second, the local dissipation efficiency for diurnal tides is assumed to be larger than that for the semi-diurnal tides poleward of 30°. Both modifications are shown to improve agreement with observational estimates of diapycnal diffusivities based on microstructure measurements and circulation indices. We also assess impacts of different spatial distributions of the barotropic energy loss. Estimates based on satellite altimetry lead to larger diffusivities in the deep ocean and hence a stronger deep overturning circulation in our climate model that is in better agreement with observation based estimates compared to those based on a tidal model.

scholarly journals Numerical modelling of the Caspian Sea tides

Ocean Science ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 209-219
Author(s):  
Igor P. Medvedev ◽  
Evgueni A. Kulikov ◽  
Isaac V. Fine
Keyword(s):  
Caspian Sea ◽  
Ocean Model ◽  
Tidal Range ◽  
The South ◽  
Tidal Dynamics ◽  
The Caspian Sea ◽  
Sea Levels ◽  
The North ◽  
Anticlockwise Rotation ◽  
Diurnal Tides

Abstract. The Caspian Sea is the largest enclosed basin on Earth and a unique subject for the analysis of tidal dynamics. Tides in the basin are produced directly by the tide-generating forces. Using the Princeton Ocean Model (POM), we examine details of the spatial and temporal features of the tidal dynamics in the Caspian Sea. We present tidal charts of the amplitudes and phase lags of the major tidal constituents, together with maps of the form factor, tidal range, and tidal current speed. Semi-diurnal tides in the Caspian Sea are determined by a Taylor amphidromic system with anticlockwise rotation. The largest M2 amplitude is 6 cm and is located in Türkmen Aylagy (called Turkmen Bay hereafter). For the diurnal constituents, the Absheron Peninsula separates two individual amphidromes with anticlockwise rotation in the north and in the south. The maximum K1 amplitudes (up to 0.7–0.8 cm) are located in (1) the south-eastern part of the basin, (2) Türkmenbaşy Gulf, (3) Mangyshlak Bay; and (4) Kizlyar Bay. As a result, the semi-diurnal tides prevail over diurnal tides in the Caspian Sea. The maximum tidal range, of up to 21 cm, has been found in Turkmen Bay. The strongest tidal currents have been located in the straits to the north and south of Ogurja Ada, where speeds reach 22 and 19 cm s−1, respectively. Numerical simulations of the tides using different mean sea levels (within a range of 5 m) indicate that spatial features of the Caspian Sea tides are strongly sensitive to changes in mean sea level.

scholarly journals Tidal Mixing Signatures in the Hong Kong Coastal Waters from Satellite-Derived Sea Surface Temperature

2018 ◽  
Vol 11 (1) ◽  
pp. 5 ◽  
Author(s):  
R. Susanto ◽  
Jiayi Pan ◽  
Adam Devlin
Keyword(s):  
Hong Kong ◽  
High Resolution ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Coastal Waters ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Sea Surface ◽  
Tidal Mixing ◽  
Diurnal Tides

Tidal mixing in the coastal waters of Hong Kong was investigated using a combination of in situ observations and high-resolution satellite-derived sea surface temperature (SST) data. An indicator of tide-induced mixing is a fortnightly (spring-neap cycle) signature in SST due to nonlinear interactions between the two principal diurnal and the two principal semi-diurnal tides. Both semi-diurnal and diurnal tides have strong tidal amplitudes and currents near Hong Kong. As a result, both the near-fortnightly (Mf) and fortnightly (MSf) tides are enhanced due to nonlinear tidal signal interactions. In addition, these fortnightly tidal signals are modulated by seasonal variability, with the maximum seasonal modulation of fortnightly tides occurring during the monsoon transition periods in May and October. The largest fortnightly signals are found in the southwestern part of the Pearl River estuary. Tidal constituent properties vary by space and depth, and high-resolution SST plays a pivotal role in resolving the spatial characteristics of tidal mixing.

Radiosonde observations of equatorial atmosphere dynamics over Indonesia: 1. Equatorial waves and diurnal tides

1994 ◽  
Vol 99 (D5) ◽  
pp. 10491 ◽  
Author(s):  
Toshitaka Tsuda ◽  
Yasuhiro Murayama ◽  
Harsono Wiryosumarto ◽  
Sri Woro B. Harijono ◽  
Susumu Kato
Keyword(s):  
Equatorial Waves ◽  
Diurnal Tides
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