Sentences with phrase «activity over periods of decades»

I hypothesized here «that upwelling in the Pacific Ocean is modulated by solar activity over periods of decades to millennia — with profound impacts on communities and ecosystems globally.

Not exact matches

The analysis showed the date of peak tornado activity in the region moved earlier at a rate of 1.55 days per decade over the time period studied.

That would not, however, explain why their frequency has been increasing by 8 percent a decade, because there has been no known systematic long - term increase of meteoric activity over the same period.

By comparing findings of the current period of minimum activity with those of previous cycles, scientists can paint a picture of the changes in the sun over a span of decades, and sometimes centuries.

A certain amount of continued warming of the planet is projected to occur as a result of human - induced emissions to date; another 0.5 °F increase would be expected over the next few decades even if all emissions from human activities suddenly stopped, 11 although natural variability could still play an important role over this time period.12 However, choices made now and in the next few decades will determine the amount of additional future warming.

Thus there is a back and forth in global cloudiness as the Sun's activity level changes over the decades and centuries — such as during the period covering the Medieval Warm Period, the Little Ice Age, and the current warm period — through latitudinal shifting of the jet stream tracks and permanent climate period covering the Medieval Warm Period, the Little Ice Age, and the current warm period — through latitudinal shifting of the jet stream tracks and permanent climate Period, the Little Ice Age, and the current warm period — through latitudinal shifting of the jet stream tracks and permanent climate period — through latitudinal shifting of the jet stream tracks and permanent climate zones.