Why is global warming measured in extinctions rather than degrees?

Question

I need help for this,it's part of a report so i need it a.s.a.p.

Answer 1

Its not mentioned in extinctions. People use fossils of extinct animals in the past to see what the climate was in the past.

Answer 2

Not every place in the world is warming at the same rate, or even warming at all—in fact, some parts of the world cooled over the 20th century. For this reason, many scientists use the term climate change rather than global warming. However, taking all of the local measurements together, the world is warming significantly, and many more places are warming than are cooling.

For many years global warming was portrayed in the media as an issue with two sides, with some scientists arguing that global warming is occurring and others arguing that it is not. However, this portrayal was an oversimplification of the scientific debate. Skeptics of global warming, including some scientists, pointed to lingering scientific uncertainties to question whether global warming is actually occurring. However, there is now undeniable evidence that global temperatures are increasing, based on direct temperature measurements and observations of other impacts such as melting glaciers and polar ice, rising sea level, and changes in the lifecycles of plants and animals. As the scientific evidence on rising global temperature became indisputable, skeptics focused their argument on whether human activities are in fact the cause of global warming

Answer 3

I didn't know it was actually. I have no idea what the question is but I would like to help. Part of the answer may be that small overall temperature changes of a couple of degrees can have drastic effects on life. Most people aren't impressed by 2 degrees, but 2 degrees would easily send many species towards extinction. 5+ degrees would change life on earth as we know it and cause mass extinction.

Answer 4

I work in a climate research group and have never heard of it being measured in extinctions, this wouldn't work anyway as there are many animals on the verge of extinction for other reasons like hunting or other changes not related to climate change. Some animals like the pine beetle in the U.S. are expanding there range.

Reefs look likely to be affected most as they don't have much tolerance for change, most animals will probably adapt quite well, polar bears will probably struggle if the Arctic sea ice melts but as Antarctica looks to be only a little affected in the short term 1-2 hundred years Penguins should be o.k. for a while.