Sentences with phrase «ppm during interglacial»

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

During the last 800,000 years, CO2 fluctuated between about 180 ppm during ice ages and 280 ppm during interglacial warm periods.

Not exact matches

Before the industrial revolution, the natural level of atmospheric CO ₂ during warm interglacials was around 280 ppm.

But during these interglacials the CO2 level was about 300 ppm, so I think the CO2 level had very little to do with the sea level rise.

Other processes must be responsible for the 40 - to 50 - ppm pCO2 drawdown during the initial transition from interglacial to glacial conditions as well as for a comparable pCO2 increase during the latter part of glacial terminatins.

Today, atmospheric CO2 is much higher; ~ 390 ppm and increasing by ~ 2 ppm yr - 1, giving a higher contribution to radiative forcing than would be expected during the Last Interglacial.

But the effect is limited: the six degrees temperature increases during interglacials shows a 100 ppm increase in CO2.