Sentences with phrase «co2 during the glacial period»

Oeschger and his colleagues in Bern were the first to measure the glacial - interglacial change of atmospheric CO2 in ice cores, showing that atmospheric concentrations of CO2 during the glacial period was 50 % lower than the pre-industrial concentration, a result predicted by Arrhenius nearly a century earlier.

Not exact matches

This meant that vast quantities of nutrients were available to phytoalgae, which in turn contributed to storing the greenhouse gas CO2 during the last glacial period.

Chemical analyses of ocean cores show that the Southern Ocean drew down at least that much CO2 millions of years ago during glacial periods.

Using climate models to understand the physical processes that were at play during the glacial periods, the team were able to show that a gradual rise in CO2 strengthened the trade winds across Central America by inducing an El Nino - like warming pattern with stronger warming in the East Pacific than the Western Atlantic.

The immediate response to that is that if a 1K warming can increase atmospheric CO2 from 280ppm to 400ppm, then it should have decreased to zero during a glacial period, which is clearly nonsense.

The immediate response to that is that if a 1K warming can increase atmospheric CO2 from 280ppm to 400ppm, then it should have decreased to zero during a glacial period, which is clearly nonsense.

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

Global average temperature is lower during glacial periods for two primary reasons: 1) there was only about 190 ppm CO2 in the atmosphere, and other major greenhouse gases (CH4 and N2O) were also lower 2) the earth surface was more reflective, due to the presence of lots of ice and snow on land, and lots more sea ice than today (that is, the albedo was higher).

It is virtually certain that millennial - scale changes in atmospheric CO2 associated with individual antarctic warm events were less than 25 ppm during the last glacial period.

Carbon starvation, which apparently sometimes occurs during glacial periods due to the low levels of CO2 that are reached, has the same effect on C3 plants * trees, shrubs, and such) as do warm, dry conditions when the warm is excesaive.

-- Even during glacial and interglacial periods — mainly being caused by orbital changes — CO2 content in atmosphere have followed temperature changes.

During the last glacial period, warming trends changed to cooling trends while the CO2 level was higher than it had been during the warming During the last glacial period, warming trends changed to cooling trends while the CO2 level was higher than it had been during the warming during the warming trend.

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.

For example, during a cooling event to a glacial period like the LGM, the long - term Earth System Sensitivity is approximately 6 °C for an equivalent forcing to a doubling (or in this case halving) of CO2.

That CO2 levels change during the past glacial and interglacial periods is very well documented.

Establishing the role of carbon dioxide (CO2), both as a feedback and forcing, during the most recent glacial and deglacial periods provides an excellent opportunity for understanding how this connection operates.

Since then, atmospheric CO2 declined as the Indian and Atlantic Oceans have been major depocentres for carbonate and organic sediments while subduction of carbonate - rich crust has been limited mainly to small regions near Indonesia and Central America [10], thus allowing CO2 to decline to levels as low as 170 ppm during recent glacial periods [11].

Our record shows that CO2 variations during the glacial period have a clear relationship with abrupt climate changes in the Northern Hemisphere that continues into the deglacial period.