Sentences with phrase «solar variations»

To understand the impacts of solar variations on climate we need to know how much the solar inputs vary, and how the climate system responds to these changes.

Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from industrial times to 1950 and a small cooling effect from 1950 onward.

All of these global climate changes show exceptionally good correlation with solar variation since the Little Ice Age 400 years ago.

In fact, the forcing from solar variation is not particularly large.

While known solar variations are less significant than the expected effects of enhanced greenhouse warming, they could either slow, for a time, or accelerate its eventual impact.

Even if solar variations have had some modest effect on climate today, he adds, they would be more than offset by greenhouse - gas warming.

If the suspected solar variations proved periodic, they might lead to long - range weather forecasts of great value for agriculture and water supply.

There are many mechanism conceivable where solar variation could have far more impact then the simple watts per M sq calculation.

Our calculation supports the IPCC findings that the contribution of solar variations to increased temperatures is not significant.

That assumption forces you to assume that any variation in ozone levels is not caused by solar variations.

However, for solar variations to explain climate change, there remains to be identified an additional solar heating mechanism beyond that already described.

A variety of natural factors influence global climate, from solar variation to volcanoes, but anthropogenic greenhouse gas emissions also change the nature of the planet.

Solar variation does not seem to impact the temperature trend.

Increasing the forcing effect of solar variations in the computer model reduces the temperature discrepancies and the need to assign any significant effect to AGHG.

(2003), The Hadcm3 model probably underestimates the influence of solar variations on climate with a factor 2.

Dr. Benestad states: «In their formula for the calculation of the sun - related temperature change, the long - term changes are determined by Zeq, while their «climate transfer sensitivity to slow secular solar variations» (ZS4) is only used to correct for a time - lag.

-- Mechanisms exist which can turn minor solar variations into large climate impacts on both regional and global scales.

The announcement by NASA that the Pacific Decadal Oscillation (PDO) had shifted to its cool phase is right on schedule as predicted by past climate and PDO changes (Easterbrook, 2001, 2006, 2007) and coincides with recent solar variations.

However there are other first order drivers of climate including natural ones like solar variation and human driven ones like land use change, aerosols and soot.

Only a vibrant economy will permit us all to adapt to climate changes that nature brings and about which we can do very little, since solar variations, ocean currents, and volcanic eruptions are quite beyond our control.

«Can Solar Variations Explain Variations in Earth's Climate?»

Solar variations correlate very well with global temperature.

They found mechanisms by which solar variation can alter climate variability regionally, but none that would trigger global warming.

In order to calculate the terrestrial response to more ephemeral solar variations, S&W introduce another type of «climate sensitivity» which they calculate separately for each of two components representing frequency ranges 7.3 - 14.7 and 14.7 - 29.3 year ranges respectively.

We also show that observed solar variations can not account for observed global temperature increase.»

-- the influence of solar variations IMHO is underestimated, as these are accompanied with a positive cloud feedback (and specific influences in the stratosphere).