The phrase
"to increase the variance" means to make the differences between different values larger or more diverse.
Full definition
But if, in addition, global warming
increases the variance of regional temperatures, then we increase the likelihood of extreme heat waves by a lot.
ECON mode also alters the operation of the cruise control system and the air conditioning system, allowing for
slightly increased variances with the set speed or the set temperature in order to conserve fuel whenever possible.
It is not enough to look at global or hemispheric means of surface temperature and note that the models are not that far from producing internal variability of the right magnitude — perhaps most existing models only do this once in a blue moon, but I can
imagine increasing the variance at low frequencies by a factor of two, say, so that the required magnitude is achieved more frequently.
Further adjustments are made to monthly SST anomalies for the varying numbers of observations in each 5 ° box because when observations are few, random errors tend to
increase the variance of the monthly mean.
Furthermore, since the end of the 19th century, we find
an increasing variance in multidecadal hydroclimatic winter and spring, and this coincides with an increase in the multidecadal North Atlantic Oscillation (NAO) variability, suggesting a significant influence of large - scale atmospheric circulation patterns.
And so unless we can get their productivity and their resilience up quite dramatically,
the increased variance in the weather, including lots of precipitation all at once, they just don't have the ability to deal with it.
I applaud the fact that you link to Tamino's explanation why
the increased variance may simply be a natural artifact of regional variability and where the baseline was chosen, and * not * actual increased variability.
An increased variance would lead to more extreme heat and cold.
The increased variance of daily temperature in summer in northern mid-continental areas noted above has also been seen in other global models (Gregory and Mitchell, 1995).
I understand that increasing volatility will
increase the variance, but it will also add to uncertainty.
To
increase variance and external validity, participants answered the SRLTAS questions as they pertained to taking their next scheduled test in any particular class and did not answer in relation to the course from which they were recruited.