Sentences with phrase «global average cloud cover»

Apparently, the global average cloud cover must not have a dramatic effect on the global average clear - sky optical thickness..

«The global average cloud cover declined about 1.56 % over 39 years (1979 to 2009) or ~ 0.4 % / decade, primarily in middle latitudes at middle and high levels (Eastman & Warren, 2012).

The increase in the global average temperature anomaly and the divergence of land and sea surface temperatures also coincided with two significant changes in global average cloud cover.

«The global average cloud cover declined about 1.56 % over 39 years (1979 to 2009) or ~ 0.4 % / decade, primarily in middle latitudes at middle and high levels (Eastman & Waren, 2012).

That was due to increased global moisture content, decreased global average cloud cover and decreased sea ice extent at high latitudes.

Not exact matches

«Global mean time series of surface - and satellite - observed low - level and total cloud cover exhibit very large discrepancies, however, implying that artifacts exist in one or both data sets... The surface - observed low - level cloud cover time series averaged over the global ocean appears suspicious because it reports a very large 5 % - sky - cover increase between 1952 andGlobal mean time series of surface - and satellite - observed low - level and total cloud cover exhibit very large discrepancies, however, implying that artifacts exist in one or both data sets... The surface - observed low - level cloud cover time series averaged over the global ocean appears suspicious because it reports a very large 5 % - sky - cover increase between 1952 andglobal ocean appears suspicious because it reports a very large 5 % - sky - cover increase between 1952 and 1997.

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.

... Conclusions Since 1950, global average temperature anomalies have been driven firstly, from 1950 to 1987, by a sustained shift in ENSO conditions, by reductions in total cloud cover (1987 to late 1990s) and then a shift from low cloud to mid and high - level cloud, with both changes in cloud cover being very widespread.

(3) This cloud cover reaction is a rapid, positive feedback with respect to TSI, and a slow negative feedback with respect to global average surface temperature.

The impact of these changes in cloud cover can account for the variations in HadCRUT4 global average temperature anomalies and the divergence between land and sea temperatures.

Maybe it all averages out, but if there are any cloud cover changes as discussed at that BH article then there might be warming or cooling that is not about «global warming» per se (as anything related to CO2).

Essentially, it's the average cloud forcing error made by CMIP5 - level GCMs, when they were used to hindcast 20 years of satellite observations of global cloud cover (1985 - 2005).

I don't think he did anything with cloud height or cloud cover, so I'm confused by your question, but either way the plots reflect monthly global average data with a 12 running mean applied to smooth out the seasonal cycle.

We disagree with this conclusion, arguing that when cloud properties are considered as a global average (Fig. 3) or over areas of frequent cloud cover (Fig. 4), the strong anti-correlation between low and middle - to - high level cloud is both clear, and statistically significant.

The global cloud cover averages around 0.68 when analyzing clouds with optical depth larger than 0.1.

Obviously, we are currently in transition and our global atmospheric cell structures are going to shift rapidly with broadly expanding Hadley cell and collapsing Arctic cell leading to meridional migration of average cloud cover and reduced albedo.

If the counter argument is that these changes are a response to Global Warming - it would be really good to see a graph showing what the models predicted / hindcast on average for the global cloud Global Warming - it would be really good to see a graph showing what the models predicted / hindcast on average for the global cloud global cloud cover.

«Global mean time series of surface - and satellite - observed low - level and total cloud cover exhibit very large discrepancies, however, implying that artifacts exist in one or both data sets... The surface - observed low - level cloud cover time series averaged over the global ocean appears suspicious because it reports a very large 5 % - sky - cover increase between 1952 andGlobal mean time series of surface - and satellite - observed low - level and total cloud cover exhibit very large discrepancies, however, implying that artifacts exist in one or both data sets... The surface - observed low - level cloud cover time series averaged over the global ocean appears suspicious because it reports a very large 5 % - sky - cover increase between 1952 andglobal ocean appears suspicious because it reports a very large 5 % - sky - cover increase between 1952 and 1997.

But now man knows that cloud cover mitigates warming from all sources (a negative feedback to Global Average Surface Temperature), while at the same time amplifying short term variations in solar radiation (a positive feedback to solar variability).