Sentences with phrase «cloud cover causes»

I seem to recall that Dessler was a little confused on the Spencer paper — and this probably was the start of the internet meme that Spencer claimed that reduced cloud cover causes El Nino.

Increasing cloud cover causes rising temperatures, which in turn causes more evaporation and therefore more clouds and higher temperatures and so on, and so on.

If the cloud cover is less the planet is warmer and visa versa, an relative increase in cloud cover causes the planet to cool.

Variations in cloud cover cause the gaps in the silvery trails that form each day.

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

My father is somewhat of a climate «sceptic» and insists that the prediction of 0.3 C cooling is based only on solar irradiance and does not take into account increased cloud cover caused by low sun activity (he beleives that we are going to be facing extreme global cooling over the next few decades).

With «mean climate», surely the model ensemble mean is meant, however the «real data» to base the tuning on by definition is restricted to the single realisation of Earth's climate (including cloud cover caused by, for instance, multi-decadal oscillations instead of AGW feedback).

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

Not exact matches

Variations in the wind speed and the weight of the particles caused some parts of the cloud to travel faster or slower than others, and so the cloud spread as it moved around Earth, until it covered the equator with an almost imperceptible veil of dust and sulfurous particles.

For climate scientists who are skeptical that anthropogenic greenhouse gas emissions will cause a dangerous amount of warming, such as Richard Lindzen and Roy Spencer, their skepticism hinges mainly on this cloud cover uncertainty.

A huge, high - pressure, dark vortex system anchored deep in Neptune's atmosphere may be what's causing the colossal cloud cover.

Unless low - level cloud albedo substantially decreased during this time period, the reduced solar absorption caused by the reported enhancement of cloud cover would have resulted in cooling of the climate system that is inconsistent with the observed temperature record.»

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.

So the mechanism should cause a decline in skin temperature gradients with increased cloud cover (more downward heat radiation), and there should also be a decline in the difference between cool skin layer and ocean bulk temperatures - as less heat escapes the ocean under increased atmospheric warming.

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

Although the direct heat increase is not enough to cause much climate change, the indirect influence of solar activity on cloud cover, wind and rain patterns may be large enough to have an important impact.

For cause and effect: You never know, but I don't think that cloud cover regulates the sun cycle... Globally, the variation of cloud cover during a sun cycle is around 2 %, which can have a substantial influence on global temperatures.

The cloud cover are likely not a forcing and thus a cause of warming but more likely a positive warming feedback.

In the case of this summer, to make it familiar, the NE North American Coast and most of Canada is cooler by extensive periods of cloud coverage, cooling caused by this region clashes with the US South extreme heat, given less bouts of clouds up North, the North American warming record would have been amazingly strong, but permanent cloud episodes over one region or another travel, never last forever, as such not causing a permanent shift in the temperature record (unless the clouds cover or not wide swats of the Polar regions).

Maybe the «cloud cover», noted by the satellite was just exactly like a cap cloud, but not from the same causes, of course.

He conveniently ignores that decreased cloud cover could be a result of the warming, executing a cause / effect bait - and - switch on us.

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

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.

However, it is consistent with our current understanding of the climate: ocean heat is exchanged with the atmosphere, which causes surface warming, which alters atmospheric circulation, which alters cloud cover, which impacts surface temperature.

The increased summer temperatures in Europe in HadAM3a were caused by reduced cloud cover at higher resolution (Jones 1999) and warming and drying, in summer, was seen over all extra-tropical continents (Stratton, 1999b).

Roy Spencer is the driving force behind the «internal variability» hypothesis, which posits that some unknown and undefined mechanism is causing cloud cover to change, which, by changing the overall reflectivity of the Earth, is the driving force behind the current global warming.

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.

And because cloud cover gates the Sun on and off, it is the most powerful feedback in all of Earth's climate to amplify solar variations and to mitigate global warming from any cause.

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

He says that the increased solar brightness over the past 20 years has not been enough to cause the observed climate changes, but believes that the impact of intense sunshine on the ozone layer and cloud cover could be affecting the climate more than the sunlight itself.

This empirical finding contradicts Spencer's hypothesis that cloud cover changes are driving global warming, but is consistent with our current understanding of the climate: ocean heat is exchanged with the atmosphere, which causes surface warming, which alters atmospheric circulation, which alters cloud cover, which impacts surface temperature.

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.

Clouds are one of the big unknowns about global warming as they can have a range of effects, warmer temperatures caused by global warming will result in higher rates of evaporation and therefore will result in higher cloud cover.

Something caused decreased cloud cover, less reflected SW and global warming in the late 20th century.

However, there is a possibility that, starting from now, increased earth temperature might cause increased cloud cover which might reduce insolation and cause a reduction in temperature.

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.

or — rising cloud cover is causing temperatures to fall?

The increase in the cloud cover rate causes the decrease in solar constant value and solar radiation on the earth's surface [which leads to cooling].

The description of ENSO may well be correct phenomenologically, but that does not imply that the components (sea temperature, trade wind, cloud cover) are causes — they may all be due to external factors.

or — falling cloud cover is causing temperatures to rise?

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..

It seems the physical nature of clouds reflecting radiation sould mean «falling cloud cover is causing temperatures to rise?»

The long term scientific investigation of the Amazon, showed that cutting down huge tracks of rain forest for agricultural use, did cause a lift in the cloud cover and precipitation.

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.»

cloud cover and wind speeds outside of operational parameters caused a reduction in average daily contribution from intermittent renewables during the BC event, essentially imparting a resilience penalty to the system.

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.

Those numerous posts document, illustrate and discuss how ENSO causes variations in atmospheric circulation, ocean currents, Downward Shortwave Radiation, cloud cover, precipitation, trade wind strength in the Pacific and Atlantic, etc..