Sentences with phrase «cause changes in cloud cover»

This might cause changes in cloud cover, due to consequent reductions in relative humidity, so you have to stop those too because they are a feedback.

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

Nowhere in the paper is there a mention of a «mechanism», which caused this change in cloud cover and reflectivity.

Not exact matches

This flexibility is designed to facilitate a higher concentration of intermittent renewable resources — such as wind and solar — than is currently possible because, by having such flexible gas - fired plants, grid operators can respond to sudden changes in renewable generation caused by variations in wind speed or cloud cover.

But I just read in the press release: «Hence, variations in cloud cover caused by cosmic rays can change the surface temperature.

I know Lindzen has a theory that a change in tropical cloud cover will offset greenhouse - gas - caused warming, the unproven «iris effect».

For example, episodic deviations in cloud and snow cover, dust and smoke, etc, will have some radiative effect that could cause some global average temperature change.

This would cause a change of 4.75 degrees K for the 100 % reference change in GCR over the 11 year solar cycle (and a non physical decrease of more than 100 % in cloud cover — are negative high clouds cooling and negative low clouds warming?

If the loss of heat by the oceans is caused by a change in radiation balance, the primary source of the change should be a change in (mainly tropical) cloud cover.

WASHINGTON — A study on how much heat in Earth's atmosphere is caused by cloud cover has heated up the climate change blogosphere even as it is dismissed by many scientists.

The satellite data shows that changes in cloud cover was the cause of all recent warming.

Dr. Roy Spencer has proposed a hypothesis whereby some unknown internal mechanism causes cloud cover to change, which in turn changes the reflectivity (albedo) of the planet, thus causing warming or cooling.

In short, Dessler argues that cloud cover change is a feedback to a radiative forcing, for example increasing greenhouse gases, while Spencer argues that clouds are changing due to some other, unknown cause, and acting as a forcing themselves.

You have not cited a third possibility (out of the infinite range of possibilities), no climate change associated with CO2 (due to, for example, cloud cover providing negative feedback), with current increase due to natural variability; or how about possibility four, that increase in CO2 concentrations are caused by the temperature rise, which is in turn caused by (for example) increased solar activity resulting in increased biomass activity etc. etc..

This effect causes a total swing of about three percent change in cloud cover.

«The overall slow decrease of upwelling SW flux from the mid-1980's until the end of the 1990's and subsequent increase from 2000 onwards appear to caused, primarily, by changes in global cloud cover (although there is a small increase of cloud optical thickness after 2000) and is confirmed by the ERBS measurements.»

The Pavlakis et al (2008) paper «ENSO Surface Shortwave Radiation Forcing over the Tropical Pacific» identifies the variations in surface downward shortwave radiation over portions of the Pacific Oceans caused by El Nino - produced cloud cover changes.

A slight change of ocean temperature (after a delay caused by the high specific heat of water, the annual mixing of thermocline waters with deeper waters in storms) ensures that rising CO2 reduces infrared absorbing H2O vapour while slightly increasing cloud cover (thus Earth's albedo), as evidenced by the fact that the NOAA data from 1948 - 2008 shows a fall in global humidity (not the positive feedback rise presumed by NASA's models!)

From Tallbloke's pdf: «The coincidence of these three spikes raises the question of whether the spike in the SST series was even caused by bucket - intake changes, since such changes obviously could not have caused the spikes in the MAT and cloud cover series.»

The cooling of the sea between 1948 and warming thereafter are entirely accounted for in the shift in the mass of the atmosphere that lies behind the change in wind strength and the flux in ozone that causes the cloud cover to change.

Instead, Spencer believes most climate change is caused by chaotic, natural variations in cloud cover.

But when they discussed changes in cloud cover, they mentioned that they couldn't tell from their data whether Spencer and Braswell's thesis about cause and effect applied.

New paper finds changes in cloud cover caused global brightening & dimming, not man - made aerosols

Again I want to emphasize that my use of the temperature change rate, rather than temperature, as the predicted variable is based upon the expectation that these natural modes of climate variability represent forcing mechanisms — I believe through changes in cloud cover — which then cause a lagged temperature response.This is what Anthony and I are showing here:

«The overall slow decrease of upwelling SW flux from the mid-1980's until the end of the 1990's and subsequent increase from 2000 onwards appear to caused, primarily, by changes in global cloud cover (although there is a small increase of cloud optical thickness after 2000) and is confirmed by the ERBS measurements... The overall slight rise (relative heating) of global total net flux at TOA between the 1980's and 1990's is confirmed in the tropics by the ERBS measurements and exceeds the estimated climate forcing changes (greenhouse gases and aerosols) for this period.

Spencer has postulated elsewhere that natural factors, such as PDO swings, might be the underlying cause for changes in cloud cover, which result in changes in global temperature, IOW that clouds act as part of a natural forcing, rather than simply a feedback to anthropogenic (or other) forcing.

Moreover, a more careful look at the changes of ISCCP clouds by cloud type shows that the increase in total cloud cover from 2000 to 2004 is due to a small increases in high - level clouds and a larger increase in middle - level clouds that are mostly thermally neutral and therefore could not cause warming (see figures, data).

Moreover, the uncertainty as such doesn't negate that climate change over the last many decades is 100 % anthropogenic in nature — unless you can point to some non-anthropogenic factor that causes cloud cover to change in a way that would cause warming.

This is not perfect because it is likely that climate effects such as ocean currents and oscillations, changes in biology, ice extent and volume changes, cloud cover variations, etc... are causing a kind of climactic Brownian Motion, hiding the signal in what, lacking deep understanding of these issues, we can only call noise.

The potential for changes in cloud cover as a result of the changes in sea ice makes the evaluation of the actual forcing that may be realized quite uncertain, since such changes could overwhelm the forcing caused by the sea - ice loss itself, if the cloudi - ness increases in the summertime.