Climate changes due to human activity have been found to increase intensity of weather events.
The National Academy of Sciences just released a report linking climate change to extreme weather. The report is entitled ‘Attribution of extreme weather events in the context of climate change’.
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The NAS is a private non-profit community which has advised the US government since 1860s. The scientists basically used the new field of finding global warming fingerprints. The new technique is also scientifically valid. The report released on Friday is 163 pages long.
According to the report it is now possible to describe how human-induced climate change alters weather. The changes can lead to an increase in the intensity of a specific extreme weather event.
The report is written by a team of top climate scientists in Washington. To write the report the panel studied linkages between climate change and extreme weather. In short the NAS report officially describes how global warming made weather events worse.
Previously there was never a clear answer to whether or not climate change had led to a weather event. Devastating weather events have many causes and all of them are natural. One of them is found to be climate change even if it is subtle.
The answers were provided by reconstructing current events. Weather events were reconstructed and human interference was evaluated. It basically viewed what might have happened if humans hadn’t changed the climate.
The group of scientists used many realistic computer model simulations. Both the present climate and a hypothetical climate without human influence were evaluated. The report found likelihood of extreme weather events was twice as likely in human influenced climate.
David Titley is a Pennsylvania State University meteorology professor and NAS chairman. According to Titley, although people plan for the climate they actually live in the weather.
The report does clarify not all weird weather can be blamed on global warming with certainty. Titley further stated some events in recent times have strong human impacts.
Such as the recent four-year California drought and the drought in Syria. Human influences have strongly affected the heat and lack of rain due to increasing global warming.
Marshall Shepherd is a University of Georgia meteorologist and a contributor to the NAS report. According to Shepherd, the NAS report is the first definitive ranking of what events can be attributed to climate change.
The report can be used to assess and manage weather risks. It can also guide climate adaptation strategies and determine greenhouse gas emission targets.
Scientists can now confidently blame some heat and cold waves to human-caused changes. A few years ago scientists could not confidently tie any specific weather events to climate change.
The NAS report has changes all that. The report will allow scientists to actually understand the how and why extreme events are changing. The report will enhance the scientific community’s evaluation abilities.
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They can accurately predict and project future weather and climatic states. Scientists can now predict both the frequency and intensity of extreme weather. The report would also allow society to potentially avoid loss of life and destruction.