Relevance of global warming
Answers
For someone to state that the global warming we’re experiencing is actually part of a 1500-year natural cycle of global temperature variation is interesting for two reasons. First — in contradiction to the great majority of sceptic arguments that actually deny global warming — this argument requires that the person promoting this explanation must first agree that climate change is, indeed, happening.
Second, they must also refuse to accept the greenhouse effect, a theory first proposed more than 100 years ago and which even many sceptics of the human contribution to climate change, readily accept.
The 1500-year cycle in question has been observed mainly through ice core data as a warming in the northern hemisphere matched at precisely the same time by a cooling in the southern hemisphere. So it’s a heat distribution issue: a global temperature ‘see-saw’ effect. The total heat in the global system remains constant.
In contrast, human-produced global warming has been caused by the rapidly increasing CO2 concentrations in the atmosphere over the last 200 years — rising over 400 parts per million after remaining below 300 parts per million for the previous 800,000 years. And unlike natural heat variations, the current temperature increase caused by CO2 is being recorded occurring all around the globe – on the ground, in the air and in the oceans.
Role of Global Warming
Explanation:
- It is normal that most biological systems will be influenced by higher atmospheric CO2 levels and higher global temperatures
- Global warming has added to the extension of drier climatic zones, for example, likely, the development of deserts in the subtropics
- Increasing global temperature implies that biological systems will change such as a few species are being constrained out of their habitats (conceivably to elimination) due to evolving conditions, while others are flourishing
- Optional impacts of an global warming, for example, diminished snow spread, rising ocean levels, and climate changes