Sentences with phrase «temperatures over that timeframe»

Multiple factors (forcings and feedbacks) account for the changes in global temperatures over that timeframe.

Not exact matches

internal / natural variability over a long enough timeframe will not alter the long term trend of the temperature record (as we are always reminded) but in this relatively short term analysis it did especially for the last decade

The first statement in this quote referred to past temperatures — Lindzen did not believe the surface temperature record was accurate, and did not believe that the planet had warmed from 1880 to 1989 (in reality, global surface temperatures warmed approximately 0.5 °C over that timeframe).

Christy is correct to note that the model average warming trend (0.23 °C / decade for 1978 - 2011) is a bit higher than observations (0.17 °C / decade over the same timeframe), but that is because over the past decade virtually every natural influence on global temperatures has acted in the cooling direction (i.e. an extended solar minimum, rising aerosols emissions, and increased heat storage in the deep oceans).

This coincided with the eruption of Mt Pinatabo which decreased global temperature over the same timeframe.

Natural temperature influences have had a very slight cooling effect, and natural internal variability appears to have had a fairly significant cooling effect over the past decade, but little temperature influence over longer timeframes.

While Foster and Rahmstorf limited their analysis to the past 32 years (since the start of the satellite temperature record), Lean and Rind performed their analysis over a range of timeframes: from 1889 to 2006, 1905 to 2005, 1955 to 2005, and 1979 to 2005.

Thus the IPCC multi-model average of simulations do not reflect these short - term temperature influences, which is not a problem for long - term predictions, because positive and negative short - term cycles and noise average out to zero over long timeframes.

However, when these influences are filtered out (red), the observed temperatures fall very close to the central climate model projections, which RFC12 notes are based on greenhouse gas emissions scenarios that accurately reflect the observed CO2 changes over that timeframe.

As we have recently discussed, although we can't say for certain statistically, it's likely that the global surface temperature warming trend has slowed over the past decade, because virtually all short - term temperature impacts have been in the cooling direction over that timeframe.

After all, we have about 100 years of measured data when it comes to global temperature, and we have a few thousand years of data that can help us estimate how the earth's temperature has changed over that timeframe.

As such, it is an invaluable tool for quickly comparing temperature trends over varying timeframes.