Sentences with phrase «cyclic variations in»

Attempts to discover cyclic variations in weather and connect them with the 11 - year sunspot cycle, or other possible solar cycles ranging up to a few centuries long, gave results that were ambiguous at best.

Arctic ice periods caused by cyclic variations in ocean currents have been known for ages, too.

There was a drop during the Ice Ages to about 180 ppm, driven by a complex of processes, with known cyclic variations in the earth's orbit at the root, with the recovery due to natural processes.

Experimental results showed the controller successfully reducing the cyclic variations in combustion by altering the exhaust valve timing, resulting in stable combustion and an expanded operating range.

The Milankovitch cycles are a set of cyclic variations in characteristics of the Earth's orbit around the sun.

Since the opposite is true the explanation that this is primarily due to uptake by plants with the lowest level of CO2 corresponding to the end of the growing season is likely the most reasonable explanation for the cyclic variation in CO2 concentration.

The amplitude of the change is about 3.5 °C which is similar but less than the 3.9 °C cyclic variation in the atmospheric temperature.

This likely due to non cyclic variation in the time series that is not accounted for in the pure cosine model.

Not exact matches

The team's data also hint that the star's cyclic 4 - day variation in brightness, although still weak, is once again growing more robust — but no one knows what's driving these flutterings or how long they will last.

Opera singers traditionally use much more vibrato — a slow, cyclic variation or «wobble» in pitch — compared to orchestral musicians.

Can a change (if observed) in these short - term and cyclic variations explain the existing stabilisation (or weak increasing) of CH4 atmospheric concentration?

You please look in to WMO (1966) mannual on «climate change» for the types analysis used to separate trend from cyclic variations which I did since early 1970s.

And his citing of the «WMO mannual on «climate change» for the types analysis used to separate trend from cyclic variations which I did since early 1970s» is not what he was citing it for in his December 2013 posting on Wattsupia.

However, although the latter varies significantly from cycle to cycle (as reflected in different cycle magnitudes varying by a factor of 2), the tilt angle exhibits roughly the same variations over all cycles, in accord with the idea of a regular cyclic behaviour (Suess et al. 1993; Cliver & Ling 2001; Alanko - Huotari et al. 2007), depending only on the solar cycle phase and not on its strength.

In the absence of an obvious amplification mechanism, evidence for strong amplification is meager, and is also apparently at odds with solar / temperature relationships over the past century and earlier outside of the cyclic variations.

A similar frequency analysis of HadSST3, shown in Figure 7, shows that the long term cyclic variation, greater then 100 years, has been severely attenuated.

It seems unlikely that any error due to sampling methods and unrelated to climate would introduce a cyclic variation that is consistently found in the time derivative.

In the derivative the NNLS algorithm converges to a much shorter, incompatible period circa 120y, this indicates that the longer cycle was a fortuitous fit to a non cyclic variation and probably does not reflect a true cycle in the datIn the derivative the NNLS algorithm converges to a much shorter, incompatible period circa 120y, this indicates that the longer cycle was a fortuitous fit to a non cyclic variation and probably does not reflect a true cycle in the datin the data.

Since cyclic terms will be largely unchanged in dT / dt a comparison with the frequency spectrum of the derivative is equally useful in separating secular and cyclic variations.

In fact, his choice of filters and differencing generates similar «cyclic variation» when fed with simple AR (1) red - noise time series.

It is better to look at regional level pattern as they follow general circulation patterns in conjenction with natural in - built cyclic variations.