What is Azolla's event?

Azolla The event was a catastrophic biogeological event that appeared approximately 49 million years ago (Central Eocene) in the North Ocean, which was then warm and without ice. On all sides, the Polar Ocean on all sides was connected on all sides, because in the north were connected by Greenland, Europe, Asia and North America. This water formation has become a stagnant, like today's Black Sea. This layer of fresh water would eventually prove the main impact on the climate of the planet on the surface, which would have a large number of precipitation that could be called the Arctic Sea in the Arctic Sea), which could be called the polar sea). Quickly after creation, it was largely colonized by freshwater ferns azolla . This species is sometimes considered to be a "super-plant" due to its rapid reproduction-it can double its biomass in 2-3 days until optimal conditions-and excellent nitrogen and carbon fixation, up to tons to acre per year nitrogen and six tons per carbon acre. As azolla It began to cover the river basin of 4,000,000 square kilometers (1,544,000 m2), the event of Azolly began because dead ferns began to sink to the bottom of the sea, where anoxic conditions caused by mixing water, which meant that Detritus was fossible.

After 800,000 years of ferns, carbon and nitrogen fixation and carbon sequestration on the Arctic Sea floor, Azolla began to impact on global carbon dioxide levels. Carbon dioxide content dropped from 3500 ppm (parts per million) to only 650 ppm. The carbon dioxide, the Azolla, caused the greenhouse effect of the Earth to disintegrate and the poles began to cool rapidly. Before the event Azolla, the average temperature of the surface water of the Arctic ocean was 13 degrees C (55.4 ° F) and after it it was -9 degrees C (15.8 degrees F), which is now average.

Azolla The event had a huge impact on climate patterns. Basic dynamics “GreeNHOUSE EARTH 'gave way to the dynamics "Icebox Earth", with the formation of glaciers to cause the Earth's surface to become more reflective, thus further cooling it. The whole continent of Antarctica, formerly wooded, slowly began to freeze. The effect culminated in the Ice Age, which began approximately 23 million years ago and continues to this day. Although we are currently in the middle of the Ice Age, the fact that the current period is interglacial means that continental glaciers are limited to Greenland and Antarctica. For most human history, the glaciers were covered by most of North America and Eurasia.