It is a curve which join highest point of the earth and lowest point of the the basis of this curve we can identify ocean reliefs as well as. The hypsographic (or hypsometric) curve is the representation of the statistical distribution of elevations over the entire world. In the areas which are covered. Hypsometry is the measurement of land elevation Bathymetry is the underwater equivalent. Hypsography of the Earth. Notice that A hypsometric curve is a histogram or cumulative distribution function of elevations in a geographical area.

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Beyond the rift valley, the depth sequence described above is observed in reverse: These subduction zones are the deepest places in the ocean, varying from 7 to 11 kilometers 4 miles to 6. For many miles out, the ocean is only a few hundred feet deep and gets deeper quite slowly i.

G115 – Introduction to Oceanography

The Ocean Floor in Cross-Section The oceans begins, of course, at the shore, the irregular boundary where the surface of a continent descends first to sea level and then beneath it. You may find it helpful to search within the site to see how similar or related subjects are covered.

Introductory Oceanography, 9th ed. Hypsohraphic Wikipedia, the free encyclopedia.

The oceanic crust that is forced to submerge or subduct in this manner slides down into the mantle at an angle. Sonar so und na vigation r anginginvented during World War II — measures distances by emitting a short pulse of high-frequency sound and measuring the time until an echo is heard. It was also difficult to tell when the sounding line had actually touched bottom.

The oceans begins, of course, at the shore, the irregular boundary where the surface of a continent descends first to sea level and then beneath it.

This area is the flank of the mid-ocean ridge, a long, undersea mountain chain that usually extends down the middle of the ocean. The disappearance of oceanic crust into subduction zones is occurring primarily along the western, northern, and eastern edges of the Pacific Ocean.


Most bathymetric maps show isobaths lines of equal depths as contours for the body of water. The hypsographic curve shows the amount of Earth’s surface at various elevations and depths. In class, we created a hypsographic curve from a given bathymetric map of a lake ranging from feet in depth.

Internet URLs are the best. There it ends as the slope moderates to a mere degree or two from horizontal. Underneath all of that water is a varied landscape of mountains, plains, trenches and slopes. Larry Gilman and K. Some features, such as mid-ocean ridges where oceanic crust is constantly produced and subduction zones, also called deep-sea trenches where it is constantly destroyedare unique to the ocean floor.

G – Introduction to Oceanography

This geomorphology article is a stub. Murray’s chart went far beyond American naval officer Matthew Maury’s first attempt at bathymetric mapping in Newer Post Older Post Home. The abyssal plains of the Atlantic appear smooth because its abyssal hills are buried under a thick blanket of continental sediment, but in the Pacific Ocean basin, which is ringed by trenches that trap sediments before they can spread over the ocean floor, tens of thousands of unburied abyssal hills have been observed.

This curve has been drawn to represent the total Earth and all of its oceans; likewise, curves can be constructed hypsogdaphic each individual ocean…. It is composed of fine-grained continental sediments silt and clay washed down the many submarine canyons that notch the continental slope. A hypsometric curve is essentially a graph that shows the proportion of land area that exists at various elevations by plotting relative area against relative height.

Water, a substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid,…. The most popular type of bathymetric maps are ones on which lines of equal depths called isobaths are represented. Not only was this method time-consuming, curge was inaccurate; ship drift or water currents could drag the line off at an angle, which would exaggerate the depth reading. Thurman, Harold, and Elizabeth Burton. In the twentieth century, sounding lines were entirely replaced by sonar systems.

Thank you for hypsographi feedback. The cumulative hypsographic curve right gives the percentage of surface area from the highest peaks to the deepest depths of the oceans. Please try again later.


Bulletin of the Geological Society of America. Elsewhere, however, such neat symmetry is not always found. Keep Exploring Britannica Water. Thank You for Your Contribution! The abyssal plain, which is the deepest, most level part of the ocean, is found where the continental rise ends, at a depth of about 4 kilometers 2.

When drawn as a 2-dimensional histogram, a hypsometric curve displays cuurve elevation y on the vertical, y-axis and area above the corresponding elevation x on the horizontal or x-axis.

When high-resolution images are desired, an underwater unit may be towed behind a ship, scanning to the left and right with multiple sonar beams sidescan sonar. Principles and Interpretation, 2nd ed. Comment about this article, ask questions, or add new information about this topic: Here, the ocean floor is marked by thousand-mile cracks called fracture zones that lie at right angles across the mid-ocean ridge. Along the center of the mid-ocean ridge is the rift valley, a deep V-shaped notch.

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Ocean-Floor Bathymetry

For example, if a hypsographic curve hgpsographic for a lake of interest, and one wanted to know what the surface area of the lake would be if the water level dropped to a specific depth, say 10 feet, the curve could be used. The data collected made possible complete bathymetric maps of the world’s oceans.

The hypsographic curve shows what percentage of Earth’s surface rises above present-day sea level to a given height, or sinks below it to a given depth.

However, unlike bathymetric maps, a hypsographic curve shows a relationship between elevation or underwater depth and the amount of Earth’s surface covered.

Archived from the original on Subsequent research using two-dimensional landscape evolution models has called the general applicability of this fit into question, [5] as well as the capability of the hypsometric curve to deal with scale-dependent effects.

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