Sentences with phrase «influence over longer timeframes»

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.

Not exact matches

On multi-decadal timeframes, GH gas forcing and the PDO / AMO combination have been having fairly even in their relative forcing over the past century, but the GH gas forcing is growing so large that it now dominating these longer - term natural variations... so the kicker is that the rapidly increasing GH gases, now at their highest levels in millions of years, are very likely influencing the nature of ENSO, PDO, AMO, and other formerly «natural» cycles.

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.