Sentences with phrase «airborne fraction increased»

The annual airborne fraction increased at a rate of 0.25 ± 0.21 % per year over the period 1959 — 2006.

They found the airborne fraction increased by 3 ± 2 % per decade.

But is the airborne fraction increasing?

Not exact matches

Empirical data for the CO2 «airborne fraction», the ratio of observed atmospheric CO2 increase divided by fossil fuel CO2 emissions, show that almost half of the emissions is being taken up by surface (terrestrial and ocean) carbon reservoirs [187], despite a substantial but poorly measured contribution of anthropogenic land use (deforestation and agriculture) to airborne CO2 [179], [216].

The only way this relationship could be linear would be if an increase in airborne fraction cancels out the logarithmic relationship between CO2 concentrations and radiative forcing.

As far as we know, the «airborne fraction» (percentage of emitted CO2 remaining atmospheric) has not been changing greatly over the past century, and if any change is occurring, the fraction is perhaps increasing very slightly due to greater saturation of the oceanic sink.

Because of this uncertainty, scientists are currently debating whether the airborne fraction is steady at 43 % or slightly Increasing from 43 %.

There are studies both ways but, I can direct you to Is the airborne fraction of anthropogenic CO2 emissions increasing?

As Knorr did find, there is no sign that the increase in the atmosphere (the «airborne fraction») changed in ratio to the emissions, thus the sink rate didn't change in ratio too.

If what you claim is true, then the airborne fraction would be increasing.

Sherlock matty; ok, if Ferdinand only means the last 160 years nature has been a net sink and there has been natural variation before I'll go with that but he still has 2 dominant unknowns in natural emissions and sinks; you can't deduce them from the increase or human emissions; and I may have missed his attitude towards Knorr which shows the airborne fraction of ACO2 constant; I must confess I have had my ups and downs with interpreting Knorr but I still think it shows that natural CO2, not ACO2, is contributing the bulk of the increase in CO2.

The change of emission rate in 2000 from 1.5 % yr - 1 to 3.1 % yr - 1 (figure 1), other things being equal, would have caused a sharp increase of the airborne fraction (the simple reason being that a rapid source increase provides less time for carbon to be moved downward out of the ocean's upper layers).

Furthermore, they found «increasing evidence (P = 0.89) for a long - term (50 - year) increase in the airborne fraction (AF) of CO2 emissions, implying a decline in the efficiency of CO2 sinks on land and oceans in absorbing anthropogenic emissions.»

The increase in the airborne fraction as temperatures increase is by no means an established fact; if anything the historical record says the airborne fraction is stable or declining very slightly.

«The proportionality of warming to cumulative emissions depends in part on a cancellation of the saturation of carbon sinks with increasing cumulative emissions (leading to a larger airborne fraction of cumulative emissions for higher emissions) and the logarithmic dependence of radiative forcing on atmospheric CO2 concentration [leading to a smaller increase in radiative forcing per unit increase in atmospheric CO2 at higher CO2 concentrations; Matthews et al. (2009)-RSB-.

Empirical data for the CO2 «airborne fraction», the ratio of observed atmospheric CO2 increase divided by fossil fuel CO2 emissions, show that almost half of the emissions is being taken up by surface (terrestrial and ocean) carbon reservoirs [187], despite a substantial but poorly measured contribution of anthropogenic land use (deforestation and agriculture) to airborne CO2 [179], [216].

Since the start of the twenty - first century, the researchers state, «the airborne fraction has been declining (− 2.2 % per year), despite the rapid increase in anthropogenic emissions.»

• All C4MIP models project an increase in the airborne fraction of total anthropogenic CO2 emissions through the 21st century.

Climate change increases the fraction of emissions that remain airborne by suppressing ocean uptake, enhancing soil respiration and reducing plant NPP.

• Climate change alone will tend to suppress both land and ocean carbon uptake, increasing the fraction of anthropogenic CO2 emissions that remain airborne and producing a positive feedback to climate change.

If we spread out our emissions over time, the airborne fraction would tend to drop because the C already added is still being redistributed (though more slowly)-- on the other hand, other effects could increase the airborne fraction, at least in the «short» - term).

To go from the amount of CO2 emitted to the actual increase in the atmosphere, one needs to know what fraction of the emissions remains in the air: the «airborne fraction».