Ice ages have thick glaciers and ice caps over many lands that today are ice-free. The amount of water on earth doesn't change, so vast amounts of land ice means there is less water in the oceans and the sea-level is lower.
When snow doesn't melt during the summer, it builds up on the land, compressing the lower layers to turn it into ice. That snow has to come from somewhere. Water evaporates from the oceans, the wind blows it over the cold land turning it into snow. Eventually, so much water is evaporated from the oceans it causes their levels to fall.
A:Basically because that ocean water gets locked up in the ice caps.Within the ice ages (or at least within the last one), more temperate and more severe periods occur. The colder periods are called glacial periods, the warmer periods interglacials, such as the Eemian Stage.
Glacials are characterized by cooler and drier climates over most of the Earth and large land and sea ice masses extending outward from the poles. Mountain glaciers in otherwise unglaciated areas extend to lower elevations due to a lower snow line. Sea levels drop due to the removal of large volumes of water above sea level in the icecaps. There is evidence that ocean circulation patterns are disrupted by glaciations. Since the Earth has significant continental glaciation in the Arctic and Antarctic, we are currently in a glacial minimum of a glaciation. Such a period between glacial maxima is known as an interglacial.
The Earth has been in an interglacial period known as the Holocene for more than 11,000 years. It was conventional wisdom that "the typical interglacial period lasts about 12,000 years," but this has been called into question recently. For example, an article in Nature argues that the current interglacial might be most analogous to a previous interglacial that lasted 28,000 years. Predicted changes in orbital forcing suggest that the next glacial period would begin at least 50,000 years from now, even in absence of human-madeglobal warming (see Milankovitch cycles). Moreover, anthropogenic forcing from increasedgreenhouse gases might outweigh orbital forcing for as long as intensive use of fossil fuels continues. At a meeting of the American Geophysical Union (December 17, 2008), scientists detailed evidence in support of the controversial idea that the introduction of large-scale rice agriculture in Asia, coupled with extensive deforestation in Europe began to alter world climate by pumping significant amounts of greenhouse gases into the atmosphere over the last 1,000 years. In turn, a warmer atmosphere heated the oceans making them much less efficient storehouses of carbon dioxide and reinforcing global warming, possibly forestalling the onset of a new glacial age.
During an ice age, Earth's sea level generally drops because water is locked up in the polar ice caps and glaciers. This causes less water to be in the oceans, leading to lower sea levels compared to during interglacial periods.
More of the earths water was frozen
No, during the ice age the ocean levels were actually lower than they are today. This is because a significant amount of water was locked up in glaciers and ice sheets on land, leading to lower sea levels.
During the last ice age, approximately 20,000 years ago, global sea levels were around 130 meters (426 feet) lower than they are today. This drop in sea level was due to a large amount of water being locked up in ice sheets covering much of North America and Eurasia.
Lower
During an ice age, Earth's sea level generally drops because water is locked up in the polar ice caps and glaciers. This causes less water to be in the oceans, leading to lower sea levels compared to during interglacial periods.
sea level is lower because so much of the ocean is frozen
During the recent ice age, glaciers covered almost 30 percent of earths land.
More of the earths water was frozen
No, during the ice age the ocean levels were actually lower than they are today. This is because a significant amount of water was locked up in glaciers and ice sheets on land, leading to lower sea levels.
A lower tariff
Lower
it's warmer and drier now, than during the Ice Ages
Global temperatures were much lower during the ice age compared to present times, leading to massive ice sheets covering large parts of the Earth's surface. Sea levels were also significantly lower due to the large amounts of water locked up in ice sheets.
That would be an ice age.
During the Great Ice Age glaciers shaped the earths surface created a mitten shape.
It is beleived that the aborigines originated from south-east Asia and they migrated to Australia via land brigdes during the last ice age when the sea level was dramatically lower (about 100-250m lower) but when the ice age ended they became cut off from the rest of the world. Cool