Isostatic adjustment is a corrective factor that scientists use to account for the fact that the basins in the ocean have increased in size since the last cycle of glaciers came to an end. This is not the result of glaciers melting, but instead the recovery of the Earth's surface from the once heavy, thick ice sheets that covered the majority of Europe and North America.Continue Reading
The sheets that lay on the Earth's surface were several kilometers thick, and that significant weight caused major shifts in the planet's structure. As a result, part of the Earth's mantle is still emerging from beneath the oceans into land areas that previously featured glaciers, with the effect that the Earth has some land surfaces that are rising and some ocean depths still falling in relationship to the Earth's center.
This means that glacial isostatic adjustment, or GIA, is leading to a shift in sea level change of -0.3 millimeters per year. This is a minuscule correction magnitude, but the uncertainty involved is a minimum of 50 percent. In general, the ocean is actually gaining room over time, and the purpose of the isostatic adjustment is to make sea level reflect oceanographic phenomena only.Learn more about Earth Science
While no one knows for certain how the Earth formed, scientists theorize that it formed over 4 million years ago after the sun went through its initial formation, gravity began to draw heavy particles together into a planet and solar winds blew away lighter gases. These heavy particles became the core of the planet. As the mass continued to grow, heavier particles sank to the center, according to Space.com.Full Answer >
An ocean current is "any more or less permanent or continuous, directed movement of ocean water that flows in one of the Earth's oceans," according to ScienceDaily.com. Currents are created by a variety of forces.Full Answer >
There are many different causes for natural disasters; seismic activity, air pressure, ocean currents and soil erosion are the main causes. A natural disaster can cause damage to property, loss of life and effect the economy of the local area.Full Answer >
Water, sunlight, temperature, pressure, chemicals and geologic features are some nonliving things in the ocean. Termed abiotic factors, these forces impact life in the oceans and on land.Full Answer >