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In your own words, explain how the idealized depiction of an amphidromic system in Figure 6.21 helps to explain the amphidromic systems of semidiurnal tidal components shown in Figure 6.22.

In your own words, explain how the idealized depiction of an amphidromic system in Figure 6.21 helps to explain the amphidromic systems of semidiurnal tidal components shown in Figure 6.22.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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In your own words, explain how the idealized depiction of an amphidromic system in Figure 6.21 helps to explain the amphidromic systems of semidiurnal tidal components shown in Figure 6.22.

 

### Amphidromic Systems in Earth's Oceans #### Figure 6.22 **Description:** This figure represents the amphidromic systems of the principal lunar semidiurnal tidal component in Earth’s oceans. The diagram is illustrated with red lines, showing the location of tidal maximums around the world. #### Key Features: 1. **Red Lines and Maximum Tidal Locations:** - The red lines on the map indicate the location of the tidal maximum. The points labeled with numbers represent hours elapsed as the maximum tide (crest) travels from the line labeled "0" to the indicated line. 2. **Rotary Amphidromic Systems:** - In most of the ocean basins, the crest of the tide wave moves in rotary amphidromic systems. - The rotation direction is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. 3. **Complex Bending of Waves:** - Tide waves, being shallow-water waves, are refracted as water depth changes. This results in complex bending of the waves in certain ocean regions. **Reference:** Adapted from Segar, D. A., 2017: Introduction to Ocean Sciences, Fourth Edition. For further details, the online resource is available at [http://www.reefimages.com/oceansci](http://www.reefimages.com/oceansci). The figure is also adapted from D.E. Cartwright, 1969, *Science Journal*, 5: 60–67. --- This detailed visual representation aids in understanding the movement and impact of tidal waves across the globe, showcasing the nature of tidal behaviors in different hemispheres and the influence of water depth on tidal wave patterns.
Transcribed Image Text:### Amphidromic Systems in Earth's Oceans #### Figure 6.22 **Description:** This figure represents the amphidromic systems of the principal lunar semidiurnal tidal component in Earth’s oceans. The diagram is illustrated with red lines, showing the location of tidal maximums around the world. #### Key Features: 1. **Red Lines and Maximum Tidal Locations:** - The red lines on the map indicate the location of the tidal maximum. The points labeled with numbers represent hours elapsed as the maximum tide (crest) travels from the line labeled "0" to the indicated line. 2. **Rotary Amphidromic Systems:** - In most of the ocean basins, the crest of the tide wave moves in rotary amphidromic systems. - The rotation direction is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. 3. **Complex Bending of Waves:** - Tide waves, being shallow-water waves, are refracted as water depth changes. This results in complex bending of the waves in certain ocean regions. **Reference:** Adapted from Segar, D. A., 2017: Introduction to Ocean Sciences, Fourth Edition. For further details, the online resource is available at [http://www.reefimages.com/oceansci](http://www.reefimages.com/oceansci). The figure is also adapted from D.E. Cartwright, 1969, *Science Journal*, 5: 60–67. --- This detailed visual representation aids in understanding the movement and impact of tidal waves across the globe, showcasing the nature of tidal behaviors in different hemispheres and the influence of water depth on tidal wave patterns.
## Understanding Amphidromic Systems and Tidal Patterns ### Diagram A: Amphidromic Point and Tidal Movement #### Overview: - **Compartmental Boxes**: The three images depict a rotating platform with boxes filled with water, representing the concept of an amphidromic point in oceanography. - **Tide Phases**: - **Time = 0 h**: High and low tides are indicated, with arrows showing the falling and rising of tides. - **Time = 3 or 6 h**: Change in tide levels with arrows indicating movement of tides. The high tide area transitions to low tide and vice versa. - **Time = 6 or 12 h**: Similar transition and movement across the box, indicating the repeating cycle of tidal changes. - **Time = 9 or 15 h**: Continued tide shifts showing the completion of a high tide to low tide cycle. ### Diagram B: Co-tidal Lines and Time Indicators #### Description: - **Polar Coordinate System**: - **Hours Indicated**: Divides the circle into segments marking every hour, showing the progression of time. - **Red Lines (Co-tidal Lines)**: Lines connecting points of the same tidal phase (e.g., high tide) across different regions. - **Black Lines (Co-range Lines)**: Lines indicating regions experiencing similar tidal ranges. ### Diagram C: Cross Section of Tidal Nodes and Antinodes #### Explanation: - **Cross-sectional View**: - **Nodes and Antinodes**: Represents points of maximum and minimum tide waves elevation due to the interaction of tidal forces. - **High Tide and Low Tide**: Dashed lines showing tidal variation from high tide to low tide. - **Middle Tide**: Indicating mid-point elevations between the high and low tide. ### Conclusion: These diagrams together illustrate the patterns and behaviors of tides under the influence of amphidromic systems. The central idea revolves around how tides rise and fall cyclically around a fixed amphidromic point, similar to a seesaw motion but across vast ocean areas, characterized by co-tidal and co-range lines indicating time and tidal phases.
Transcribed Image Text:## Understanding Amphidromic Systems and Tidal Patterns ### Diagram A: Amphidromic Point and Tidal Movement #### Overview: - **Compartmental Boxes**: The three images depict a rotating platform with boxes filled with water, representing the concept of an amphidromic point in oceanography. - **Tide Phases**: - **Time = 0 h**: High and low tides are indicated, with arrows showing the falling and rising of tides. - **Time = 3 or 6 h**: Change in tide levels with arrows indicating movement of tides. The high tide area transitions to low tide and vice versa. - **Time = 6 or 12 h**: Similar transition and movement across the box, indicating the repeating cycle of tidal changes. - **Time = 9 or 15 h**: Continued tide shifts showing the completion of a high tide to low tide cycle. ### Diagram B: Co-tidal Lines and Time Indicators #### Description: - **Polar Coordinate System**: - **Hours Indicated**: Divides the circle into segments marking every hour, showing the progression of time. - **Red Lines (Co-tidal Lines)**: Lines connecting points of the same tidal phase (e.g., high tide) across different regions. - **Black Lines (Co-range Lines)**: Lines indicating regions experiencing similar tidal ranges. ### Diagram C: Cross Section of Tidal Nodes and Antinodes #### Explanation: - **Cross-sectional View**: - **Nodes and Antinodes**: Represents points of maximum and minimum tide waves elevation due to the interaction of tidal forces. - **High Tide and Low Tide**: Dashed lines showing tidal variation from high tide to low tide. - **Middle Tide**: Indicating mid-point elevations between the high and low tide. ### Conclusion: These diagrams together illustrate the patterns and behaviors of tides under the influence of amphidromic systems. The central idea revolves around how tides rise and fall cyclically around a fixed amphidromic point, similar to a seesaw motion but across vast ocean areas, characterized by co-tidal and co-range lines indicating time and tidal phases.
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