Sentences with phrase «recent natural fluctuations»

Not exact matches

«The recent earthquake rate changes (in Oklahoma) are not due to typical, random fluctuations in natural seismicity rates,» they said.

Comparing model predictions of GHG - induced warming with recent natural temperature fluctuations also indicates the potential scale of man - made climate change.Early modelling experiments focused on the total long - term change resulting from a doubling of carbon dioxide (CO2) levels.

The shaded region in figure A shows, very approximately, the range of recent natural temperature fluctuations on 1,000 - year time scales.

There are no known fluctuations in recent (last millennium) natural sources and sinks of CO2 that are remotely as large as the growth in CO2 of the last half century.

This is powerful evidence that the recent slowdown in global temperature increase is not a slowdown of «global warming,» i.e. man - made climate change, it's simply partial cancellation of global warming by the natural fluctuations due to ENSO.

Abstract «Although we conclude, as found elsewhere, that recent warming has been substantial relative to natural fluctuations of the past millennium, we also note that owing to the spatially heterogeneous nature of the MWP, and its different timing within different regions, present palaeoclimatic methodologies will likely «'' flatten out» estimates for this period relative to twentieth century warming, which expresses a more homogenous global «'' fingerprint.»

These results suggest how extreme recent warming has been relative to the natural fluctuations of the past millennium.

The argument may be advanced that temperature fluctuation is the normal behaviour of climate and that recent warming is purely natural climate variability.

El Niño's center of action appears to be shifting from the eastern to the central Pacific, which in turn is affecting the distribution and frequency of weather events.7 However, due to the wide natural fluctuations within circulation patterns, it is difficult to attribute recent changes solely to human activity.

«To assess the natural variability before much human interference, the new study uses «multi-proxy climate reconstructions» developed by scientists in recent years to estimate historical temperatures, as well as fluctuation - analysis techniques from nonlinear geophysics.

We can place this apparent lack of warming in the context of natural climate fluctuations other than ENSO using twenty - first century simulations with the HadCM3 climate model (Gordon et al. 2000), which is typical of those used in the recent IPCC report (AR4; Solomon et al. 2007).

Either run a GCM through recent data or filter the natural fluctuations to focus only on inherent warming trends.

Backing that up, NASA says that 1) sea surface temperature fluctuations (El Niño - La Niña) can cause global temperature deviation of about 0.2 °C; 2) solar maximums and minimums produce variations of only 0.1 °C, warmer or cooler; 3) aerosols from natural sources such as volcanic eruptions (Mount Pinatubo for example) have caused average cooling of 0.3 °C, but recent eruptions have had not had significant effect.