Sentences with phrase «showing human influence on climate»

This is a 1995 analysis by Shell International B.V. scientist Peter Langcake of whether climate change was in fact underway and if, as some scientists were suggesting, a «signal» had been detected showing human influence on climate from temperature, weather, polar ice melt and other data.

In 2005, Rep. Joe Barton, R - Texas, called Mann before Congress to testify about his now ubiquitous «hockey - stick» graph, showing temperatures in the Northern Hemisphere over the past millennia, with an abrupt spike upward at the end showing human influence on the climate.

P.S. I do agree with you also that the policymakers (and Gavin) have made the global average surface temperature anomaly the primary climate metric to show the human influence on the climate system.

Not exact matches

In addition, noted climate scientist Peter Stott of the U.K. Met Office, these studies show that in many cases, human influence on climate has increased the risks associated with extreme events.

Hundreds of private e-mails and documents hacked from a computer server at a British university are causing a stir among global warming skeptics, who say they show that climate scientists conspired to overstate the case for a human influence on climate change.

Here's the second (and final) installment from Andrew A. Lacis of NASA's Goddard Institute for Space Studies providing more detail on his view of the evidence showing a human warming influence on the climate.

My take on his position is that on any climate issue whatsoever — if you can not prove there is no human influence (refute the null hypothesis by showing it is less than 5 % probable or 1 % probable or whatever), then we have to conclude that it (whatever the question is that is being looked at) is caused by human influence.

Trenberth argues that since science / physics has already established the human influence on climate, oceans, etc. (and Curry would not say otherwise) it makes more sense for Curry to have to show that there is no influence on water vapor and precipitation (i.e., intensification of storm activity / heavy precipitation) than to show that there is, because of basic physics / physical systems / physical relationships that constitute the global climate cycle.

Andrew Revkin: I think it's taken ages for the world to even integrate, meaningfully, the reality that scientists have shown clearly — that humans are a building influence on the climate system.

The models, in important ways that were once claimed to be proof of ``... a discernible human influence on global climate», are now shown to be FUBAR.

«multiple lines of evidence indicate that human influences have had an increasingly dominant effect on the climate warming observed since the mid-twentieth century» - a handful of papers a year that only most ardent warmists can find against the thousand of natural influence showing papers.

In fact, they state that the data «clearly show» that «strong natural variability has been characteristic of the Arctic at all time scales considered,» and they reiterate that the data suggest «that the human influence on rate and size of climate change thus far does not stand out strongly from other causes of climate change.»»

Interesting that they state: Peter Stott, Head of Climate Attribution at the Met Office, said: «Our research shows current global average temperatures are highly unlikely in a world without human influence on the cClimate Attribution at the Met Office, said: «Our research shows current global average temperatures are highly unlikely in a world without human influence on the climateclimate.

The following figure shows changes in climate «forcings» or factors that have contributed to climate change since 1750, before human influences on climate were very significant.

Based on temperature records from 1864 to 2002, the odds of such a heatwave occurring are about 1 in 10 million.4 An event like the 2003 heatwave becomes much more likely after factoring in the observed warming of 2 °F over Europe and increased weather variability.5 In addition, comparing computer models of climate with and without human contribution shows that human influence has roughly quadrupled the odds of a European summer as hot as or hotter than the summer of 2003.6

Comments like this from Keith Trenberth: «Given that global warming is «unequivocal», to quote the 2007 IPCC report, the null hypothesis should now be reversed, thereby placing the burden of proof on showing that there is no human influence [on the climate].»