Sentences with phrase «computer models of climate»

This number is traditionally calculated using complex computer models of the climate system, but despite decades of progress, the number is still subject to uncertainty.

The hypothesis of anthropogenic greenhouse gases was born out of computer modelling of climate changes.

Only with the inclusion of human influences can computer models of the climate reproduce the observed changes.

The findings are based on analyses of ancient plant leaf wax found in the sediments of the Gulf of Guinea in combination with computer models of the climate system.

Professor William Happer of Princeton, one of the world's foremost physicists, says computer models of climate rely on the assumption of the CO2's direct warming effect that is about a factor two higher, owing to incorrect representation of the microphysical interactions of CO2 molecules with other infrared photons.

Researchers from Stanford University and the National Center for Atmospheric Research (NCAR) put data on weather and crops into computer models of climate.

They said the real strength of the Jacobson study — now in press at the Journal of Geophysical Research - Atmospheres — is that it relies on a new computer model of climate, air pollution and weather that accounts for several different ways black carbon influences the environment.

Broadly speaking, we can use the temperature change from the instrumental record (the past 150 years or so), or complex computer models of the climate, or temperature changes we've deduced for climates in the distant past (such as the last ice age 20,000 years ago, or the warm Pliocene 3 to 5 million years ago).

Previously, computer models of climate didn't predict that a shutdown in this current would occur.

In their research, team members used advanced computer models of the climate system to estimate changes in the tropopause height that likely result from anthropogenic effects.

The CCC uses projections from computer models of climate change to forecast a higher incidence of extreme weather events such as floods, heatwaves and droughts.

This information could assist climatologists in developing new, more accurate computer models of the climate, which could be used to better understand and predict the effects of global climate change.

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

Changes in precipitation are quite complex, 9 and current computer models of climate have only a limited ability to predict the heaviest precipitation.

SCIENTISTS have put a huge amount of effort into generating computer models of our climate system.

Both are increasingly at odds not only with the surface temperature records, all of which have been adjusted ex post facto so as to show more warming than the original raw data showed, but also with the alarming projections of the serially unreliable computer models of climate on which the U.N.'s Intergovernmental Panel on Climate Change profitably but misguidedly relies.

Dr. Lomborg believes that when it comes to computer models of climate change, the International Panel on Climate Change deals all four wild cards in a way that exaggerates the effect of greenhouse gases.

«Computer models of the climate system are now highly sophisticated and can differentiate between natural cycles and changes made by increased levels of atmospheric carbon dioxide.

Surely they would have to rely on computer models of climate, but would APS require that those models be validated?

Brian Ryan, Ian Watterson and Jenni Evans of the CSIRO Division of Atmospheric Research ran a computer model of climate in a world where the atmosphere's carbon dioxide content has doubled.

Computer models of climate are one tool for specialists but what we currently lack is not a better model but expertise on how to use them most appropriately.

Computer models of the climate system have a difficult time reproducing this sudden melt.

Computer models of the climate that include both natural forces as well as human influences are consistent with observed global trends in heat waves, warm days and nights, and frost days over the last four decades.13 Human influence has also been shown to have contributed to the increase of heavy precipitation over the Northern Hemisphere.14

We can design for that in computer models of climate, just as architects design earthquake - resistant sky scrapers.

Computer models of the climate, while still imperfect, improved, and there were 10 more years of temperature data.