Sentences with phrase «co2 during colder periods»

Not exact matches

Years ago it was demonstrated that CO2 was significantly higher in earth's geological past during much colder periods.

: the fact that the ocean was colder during glacial periods by itself explains only about 10 % of the CO2 change.

If there was actually glaciation during cold periods, glacial dust might well have blown out to sea, fertilizing large areas and producing a stronger CO2 pump.

During the 800,000 years prior to 1750, atmospheric CO2 varied from 180 ppm during glacial (cold) up to 300 ppm during interglacial (warm) peDuring the 800,000 years prior to 1750, atmospheric CO2 varied from 180 ppm during glacial (cold) up to 300 ppm during interglacial (warm) peduring glacial (cold) up to 300 ppm during interglacial (warm) peduring interglacial (warm) periods.

Our long ago ancestors evolved during these hot periods, which are far nearer the norm than the current, comparitvely, cold and CO2 starved period.

The fact that the earth appears to have gone through huge changes in atmospheric CO2 concentration over geologic eras, while the estimated temps went from 12degC to 22 deg C regardless of «Snowball Earth» or «Cretaceous Hot House» with both hot and cold periods occurring during both high and low CO2 regimes and both with and without ice caps argues very strongly that we do not understand the climate mechanism at all.