Wave base is the depth at which agitation of bottom sediment begins to occur. Which feature of a wave is most important to understand the energy a wave carries? In other words, as the wind increases, this also must increase. The height of a wave, i. Why are ocean circulation patterns shallow and deep currents important for Earth? Surface currents and the deep thermohaline circulation are a large distribution network of heat that moves it around the planet.
It is restricted bays and inlets, like the Bay of Fundy, that funnel the tidal energy and produces very high tidal ranges. The offshore and nearshore are always under water. Diagram describing wave base. Gravity on land decreases because of felsic composition. Shallow water and friction with the seafloor causes waves to slow down and rise up. Shore currents push waves up. High tides coinciding with high surf produces breakers. Sand grains and their friction causes rising. Wavelength times amplitude.
Twice amplitude. Twice wavelength. Choppy seas are produced in the open ocean. The longer and shorter wavelengths become intermixed in the wave train. Dangerous rogue waves develop.
The shorter wavelengths drop out of the wave train. Movements of water rising and falling due to the gravity of the moon and sun. A large pile of sediment, deposited perpendicular to flow. A ridge of sediment that occurs out into a body of water, formed via longshore currents. A geologic circumstance such as a fold, fault, change in lithology, etc.
Place where rivers enter a large body of water, forming a triangular shape as the river deposits sediment and switches course. Lagoons are deeper. Tidal flats have less living creatures. Lagoons have a larger connection with the main ocean. Lagoons have more erosion. Tidal Flats are sometimes dry.
Tidal flats. Submarine canyons. Jetties and groins. Baymouth bars and tombolos. Spits, bars, berm. Deep currents. Eroding sandstone. Wave erosion. Shallow currents. Moving sand. The moving sand of longshore drift forms features like spits, bars, berm.
What is the process involved in the formation of the summer and winter berm. Neap tides combine with longshore currents more in the summer time, less in the winter time. Larger summer crowds pack the summer sand down tighter. Higher storm energy in the winter moves sand off the beach and stores it in the nearshore. Winter rip currents carry streams of sand offshore. Winter waves hit the beach at greater angles than summer waves.
Large circular ocean currents formed by global atmospheric circulation patters. Moon; density. Wind; density. Wind; moon. Density; wind. Density; moon.
Lunar gravity is slowing the Earth down in its rotation. Solar gravity is slowing the moon down in its orbit. The moon is in retrograde, hence slower in orbit around the earth. Earth's gravity is slowing the moon down in its orbit. What important function do surface currents provide to the land?
Coastal erosion. Climate regulation. Coastal deposition. Longshore drift. Organism transport. Which type of tide. Chapter 12 Review Use this quiz to check your comprehension of this chapter. Marine terrace. Drowned estuary. Submarine canyon. Tidal flat. Provide a new location for a beach. Keep an entryway to a harbor open. Stop a beach from eroding away.
Funnel currents away from a marina. Protect the beach from larger waves. How often does a full cycle of a tide. Slightly more than 24 hours. Exactly 24 hours. Slightly less than 36 hours. Slightly more than 12 hours. Exactly 12 hours. Angle that waves hit the shoreline. Speed of the waves. The number of waves in the wave train.
Fetch of the waves. Wavelength of the waves. Bring surface sediments to the deep parts of the ocean. Prevent ocean water from freezing. Bring deep sediments to the surface of the ocean. Main transportation for ocean life. Move heat around the planet, distributing it. Why do some locations have especially high tidal ranges? Larger fetch from open ocean. Deeper ocean offshore.
Straight beaches. Curved beaches. Restricted bays and inlets. Which part of a coastal area is always under water? Quite often, emergent coasts have rocky coastlines with cliffs and nearly flat platforms that extend inland where older coastal plains have been tectonically raised and are now elevated above the modern land and water interface. A very good example of an emergent coastline, because of its proximity to an active plate tectonic margin, is the west coast of North America.
Parts of the Scandinavian coastline Sweden and Norway are also emergent where the land surface has been rebounding upward due to the removal of the weight of glacial ice that formed during the last Ice Age, but has since melted. The images below show typical emergent coastlines. Submergent Coasts are those that have been flooded by ocean waters because of a relative rise in the elevation of sea level at that location.
The rise in sea level can be either the result of an increase in the volume of water in the ocean basins or the result of the land surface sinking, both of which create an apparent rise in the elevation of sea level. Relict cliffs An old cliff displaying features such as caves, arches and stacks.
Impacts of present and predicted sea level rise Impacts of present and predicted sea level rise on UK settlements Impacts of present and predicted sea level rise on London Impacts of present and predicted sea level rise on fresh water sources Environmental impacts of present and predicted sea level rise Total views 43, On Slideshare 0.
From embeds 0. Number of embeds 10, Downloads Shares 0. Comments 0. Likes 6. You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later. Now customize the name of a clipboard to store your clips. Visibility Others can see my Clipboard.
Cancel Save. Estuaries are associated with submergent coastlines formed when sea level rises and floods existing river valleys. Active margins can have both emergent and submergent coastlines in close proximity to each other. Emergent and Submergent Coasts Another important factor in understanding shorelines is tectonic activity and the rise and fall of sea level.
0コメント