Throughout the history of the Earth's climate has changed many times and made it even globally affecting the entire planet.
20000 years ago ice covered northern Europe, Scandinavia, reaching 2500 meters thick. This was the latest Quaternary glacial advance, a period covering the last 2 Ma But there have been very warm periods, with average temperatures exceeded 22 º C.
CHANGES IN SEA LEVEL
-Changes in water cycle . In summary, the water cycle involves evaporation of the oceans, forming clouds which precipitates and back to sea, or gone directly travésde rivers. During the glacial periods is frequent rainfall and snow and ice transfomer remains on the continents. The withdrawal of seawater and their accumulation on the continents as ice represents a decrease of sea level.
"Thermal expansion of water. In the warm periods sea level rises, not only because acumuldo ice melts and more water in the oceans, but because to find ocean water expands at higher temperatures.
0 comments:
Post a Comment