Sentences with phrase «observed changes in cloud»

However, there have been several studies comparing observed changes in cloud cover to cloud simulations in climate models.

That has nothing to do with the invention of some novel solar mechanism (although the exact mechanism is not known), but with the implementation of the observed changes in clouds, as result of solar changes, in the models.

That has nothing to do with the invention of some novel solar mechanism (although the exact mechanism is not known), but with the implementation of the observed changes in clouds, as result of solar changes, in the models.

The authors are very careful not to describe the observed change in cloud cover as a «feedback».

Not exact matches

In my class on climate change problem solving, I use a 2005 paper by M. H. Zhang et al. that compares modeled clouds with observed ones from 10 climate models.

This unique orbit path will allow the CATS instrument to observe locations at different times of day and allow scientists to study day - to - night changes in cloud and aerosol effects from space.

However, radiation changes at the top of the atmosphere from the 1980s to 1990s, possibly related in part to the El Niño - Southern Oscillation (ENSO) phenomenon, appear to be associated with reductions in tropical upper - level cloud cover, and are linked to changes in the energy budget at the surface and changes in observed ocean heat content.

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Thus the study shows that that iRAM simulates recently observed cloud cover changes in this the eastern Pacific more accurately than the GCMs, and iRAM also successfully simulates the main features of the observed interannual variation of clouds in this region, including the evolution of the clouds through the El Niño Southern Oscillation (ENSO) cycle.

As the planet spins, Hubble was able to observe changes in brightness caused by clouds within its atmosphere.

«we estimate that less than 23 %, at the 95 % confidence level, of the 11 - year cycle changes in the globally averaged cloud cover observed in solar cycle 22 is due to the change in the rate of ionization from the solar modulation of cosmic rays.»

If we can get climate models to more credibly simulate current cloud patterns and observed cloud changes, this might reduce the uncertainty in future projections

No matter what (unknown) physical process causes the changes in cloud cover, these changes are observed during a sun cycle.

I am happy to agree with WebHubTelescope that the changes in observed cloud cover may be a result of increases in CO2.

So if there were, say, a decadal - scale 1 % -2 % reduction in cloud cover that allowed more SW radiation to penetrate into the ocean (as has been observed since the 1980s), do you think this would have an impact of greater magnitude on the heat in the oceans than a change of, say, +10 ppm (0.00001) in the atmospheric CO2 concentration?

From the figures I took an average value of 0.45 — but, hey, if you prefer to assume 0.35, that's OK, because it will not change the conclusion that the observed Arctic sea ice melt has not appreciably changed our planet's total albedo, and that a very small change in cloud cover would have a far greater effect.

Ozone depletion in the late twentieth century was the primary driver of the observed poleward shift of the jet during summer, which has been linked to changes in tropospheric and surface temperatures, clouds and cloud radiative effects, and precipitation at both middle and low latitudes.

With this final correction, the ERBS Nonscanner - observed decadal changes in tropical mean LW, SW, and net radiation between the 1980s and the 1990s now stand at 0.7, -2.1, and 1.4 W m ^ 2, respectively, which are similar to the observed decadal changes in the High - Resolution Infrared Radiometer Sounder (HIRS) Pathfinder OLR and the International Satellite Cloud Climatology Project (ISCCP) version FD record but disagree with the Advanced Very High Resolution Radiometer (AVHRR) Pathfinder ERB record.

Is it plausibe we could observe these and calculate cloud processes (determing where clouds form and dissipate, geographically and vertically) by changes in these wavelength at ToA?

Following this change in composite methodology and the clearer isolation of the CR reduction, it was observed that cloud anomalies over the Antarctic Plateau similar to those seen by TK were actually identified two days before the maximal reductions in the CR flux.

This suggests that the aerosol indirect effect and in particular the increase of cloud cover can serve as a possible explanation to the observed changes in surface illumination.

If this hypothesis is validated it could be a «paradigm buster», in that it would provide a mechanism for the observed reaction of our climate to changes in cloud cover (Spencer) and the empirically observed correlation between solar activity and temperature (Svensmark), which lies beyond the measured impact of direct solar irradiance alone.

It gives secular changes on decadal timescales in cloud across the Pacific observed both from the surface and from satellites.

It is logical to presume that changes in Earth's albedo are due to increases and decreases in low cloud cover, which in turn is related to the climate change that we have observed during the 20th Century, including the present global cooling.

Changes in cloudiness appear to play a negligible role in observed Arctic darkening, thus reducing the possibility of Arctic cloud albedo feedbacks mitigating future Arctic warming.