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.Know More
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
Ocean ecosystems or marine ecosystems are made up of a community of living and nonliving things found in a localized area in any ocean. In an ecosystem, the plant life and animal life support one another and are each dependent on the other for the success of the ecosystem.Full Answer >
Water and land heat unequally due to the fact that they produce different heating capacities. Heat capacity is defined as the amount of heat, measured in calories, required to change the temperature of a substance by one degree Celsius. Water has a higher heating capacity than land.Full Answer >
Global winds refer to the pattern of air movement all around the globe, and they result from the fact that the Earth receives unequal heating from the sun. Not only does the tilt of the Earth's axis mean that different parts of the planet receive disparate amounts of sunlight, but the oceans and lands also heat at different rates. The imbalance in temperature makes heat move toward the poles, both in the wind and in ocean currents. When horizontal variances in air pressure take place as a result, wind occurs.Full Answer >
Ocean waves are an expression of energy moving through water. The most common ocean waves are caused by surface winds pushing water toward land. Seismic activity can also cause waves, such as tsunamis created by undersea earthquakes or landslides. Undersea currents can also influence wave formation, creating small oscillations deep in the ocean that can intensify once the waves approach a coastline.Full Answer >