enginesrus
Mechanical
- Aug 30, 2003
- 1,013
The experts are saying there are more baseball home runs because of climate change.
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enginesrus said:I just quoted the news
TugboatEng said:You gave me a list of names of people that have made observations about climate or head agencies that say things about climate
TugboatEng said:Also, is Wikipedia a credible source?
TugboatEng said:Here are some thoughts form a climate scientist.
Barry Klinger said:There is virtually no controversy among experts - even among those who are skeptical of human influence on temperature - that humans are making big changes in the chemistry of the atmosphere
Barry Klinger said:Despite these problems, we have confidence in the existence of large warming trends, which are seen in very different data sets, including measurements taken with land-based weather stations, ship-based seawater observations, and satellite data.
Barry Klinger said:The importance of this greenhouse effect to the atmosphere is uncontroversial.
Barry Klinger said:Doubling the atmospheric concentration of CO2 will warm the Earth by something like 2-4oK.
Barry Klinger said:Thus human-induced changes in CO2 and other gases are expected to make a small change in the absolute temperature of the Earth, but one which is larger than any in recorded history and which may bring massive changes to ecosystems and society.
Barry Klinger said:The ability of models to reproduce 20th century warming is a sign that the models are not wildly inaccurate. However, they do not allow us to be any more definitive, due to a number of factors.
Barry Klinger said:Strangely enough, it can be easier to predict things further in the future than closer.
Barry Klinger said:From 1990 to 2010, observed Global Mean Surface Temperature increased at a rate of .12oC/decade, within the range implied by the climate models reported in 1990.
Barry Klinger said:Therefore human activity is the best hypothesis for explaining global warming.
Barry Klinger said:No climate model has reproduced 20th century warming by incorporating these alternatives rather than greenhouse gas increases. Whatever the shortcomings of climate models, they have been more extensively tested than the non-existent simulations demonstrating a different mechanism. Any skepticism about model-based evidence for a human cause applies doubly to other hypothesized causes backed by little more than speculation.
Barry Klinger said:Some individual scientists, including meteorologists and physicists, argue that humans have a relatively small effect on climate. While these scientists receive great attention in the popular press and in Congress, they seem to be a small minority among climate researchers.
Barry Klinger said:Surveys of scientists in climate-related fields have found high levels of agreement that humans are likely to be causing global warming. For instance, among published members of the American Meteorological Society (Stenhouse et al., 2013),
75%: global warming at least about half caused "by human activity",
5%: global warming not happening or mostly caused "by natural events",
20%: various levels of uncertainty.
Barry Klinger said:In conclusion, the main scientific bodies and a large majority of scientists in climate-related fields believe that much of global warming is caused by humans. A small minority disagrees.
Barry Klinger said:No climate model has reproduced 20th century warming by incorporating these alternatives rather than greenhouse gas increases. Whatever the shortcomings of climate models, they have been more extensively tested than the non-existent simulations demonstrating a different mechanism. Any skepticism about model-based evidence for a human cause applies doubly to other hypothesized causes backed by little more than speculation.
Barry Klinger said:No climate model has reproduced 20th century warming by incorporating these alternatives rather than greenhouse gas increases. Whatever the shortcomings of climate models, they have been more extensively tested than the non-existent simulations demonstrating a different mechanism. Any skepticism about model-based evidence for a human cause applies doubly to other hypothesized causes backed by little more than speculation.