Global warming could be influenced by a variety of factors. Millions of years ago a salt water fern absorbed CO2 from the atmosphere. As the ferns died they sank and that carbon became sequestered on the deep sea floor.
They do not currently account for spatial or temporal variabilities such as cooling. And these new aspects of ice-sheet behavior need to be incorporated into glaciological models of ice-sheet flow.
Thus Antarctica is not contributing to sea level rise. See the Antarctica regional summary at www. Greenland is another region of concern since it contains a large ice sheet with potential to melt. Unlike Antarctica, Greenland has exhibited warming in recent decades, resulting the melting of exit glaciers edges of the ice sheet flowing through valleys.
However, researchers have found that the net decrease in the Greenland ice sheet is relatively small. One study states [Ref. This suggests that the Greenland ice sheet and coastal regions are not following the current global warming trend.
A considerable and rapid warming over all of coastal Greenland occurred in the s when the average annual surface air temperature rose between 2 and 4 C in less than ten years at some stations the increase in winter temperature was as high as 6 C.
This rapid warming, at a time when the change in anthropogenic production of greenhouse gases was well below the current level, suggests a high natural variability in the regional climate. The following figure shows the melt water runoff trend from a study [Ref.
Sea levels have been falling in the 30 — 90 degree area northern hemisphere as the continents rebound from the last ice age. Slight rise has occurred as a result in some areas. Most of the world shows little or no change.
The following figure shows the sea level rise around Africa.Modern Global Warming (MGW) is the change in climate that has been taking place from the coldest period of the Little Ice Age (LIA) to the present.
It is characterized by a preponderance of warming periods over cooling periods, resulting in the warming of the planet, expansion of tropical areas. Global warming means that Antarctica and Greenland ice sheets are melting and the oceans are expanding.
Recent climate change would still cause a 6 meters (20 ft) sea-level rise even if greenhouse gas emissions were reduced in per a scientific paper in Science.
Four Degrees of Global Warming: Australia in a Hot World [Peter Christoff] on schwenkreis.com *FREE* shipping on qualifying offers. At Copenhagen in December , the international community agreed to limit global warming to below two degrees Celsius to avoid the worst impacts of human-induced climate change.
However climate . So no warming becomes more definitely anthropogenic global warming. A study comparing the models to observations from satellites and balloons () also shows a problem with the models.
The following figure is from the study.
Jul 17, · Since , more than 31, American scientists from diverse climate-related disciplines, including more than 9, with Ph.D.s, have signed a public petition announcing their belief that. Take detailed notes, keeping track of your sources.
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