Sentences with phrase «carbon on a net basis»

These episodes were the first times that the Amazon was documented to have lost its ability to take in atmospheric carbon on a net basis.

Not exact matches

Not considering the change in net uptake of carbon by the ocean, you can put the following numbers on that (based on Ramanathan and Feng, 2009):

The title of the paper is «Tropical forests are a net carbon source based on above - ground measurements of gain and loss ``.

To stop CO2 ppm rising and holding them at under 408 ppm for 2018 would require a reduction in Net carbon emissions of at least 2 GtC / yr on current use based on multiple lines of refs in published papers from Hansen down to the latest PhD student of climate science.

Projects must demonstrate actual net zero carbon performance based on a twelve month performance period, during which the project must be occupied as its stated occupancy.

Here is a big stack of issues that Parties should tackle: stringent CDM reform; a framework for new mechanisms that results in a net decrease of emissions and is based on principles ensuring sustainable development and the protection of human rights; removal of loopholes that weaken targets such as surplus AAUs and non-additional carbon credits.

water - use efficiency carbon gain in photosynthesis per unit water lost in evapotranspiration; can be expressed on a short - term basis as the ratio of photosynthetic carbon gain per unit transpirational water loss, or on a seasonal basis as the ratio of net primary production or agricultural yield to the amount of available water

It can be expressed on a short - term basis as the ratio of photosynthetic carbon gain per unit transpirational water loss, or on a seasonal basis as the ratio of net primary production or agricultural yield to the amount of available water.

«Although it is probable that introduction of wind power onto the grid produces a net reduction in carbon dioxide emissions, it is possible, or even likely, that a grid based entirely on gas turbines would actually produce carbon emissions that were lower still.»

In a nutshell, hitting Paris targets will mean both that developed nations start rapidly reducing toward net - zero emissions by mid-century and that developing nations find a different path to prosperity than the one traveled by the countries around them holding all the wealth and still, on a per - capita basis, emitting the most carbon.

If the SCC can be shown to be negative at current levels of abatement (and bear in mind that your excellent chart of net benefits for various abatement paths refers to benefits relative to the 2010 policy stance) then I'd be content to freeze policy at current levels but to steadily transfer all policies to a carbon tax, or at least to cost them on a common basis, ie to treat renewable subsidies as implicit carbon taxes.

On a carbon basis, enough air would pass through one 200 MW solar updraft tower to destroy about 0.4 million tons of CO2 - equivalent GHGs per year (at a 25 % net non-CO2 GHG - removal efficiency).

Tropical forests are a net carbon source based on new measurements of gain and loss.

A Science paper concluded that tropical forests are now a net source of carbon emissions, with deforestation and forest degradation releasing more CO2 into the atmosphere on an annual basis than forests can sequester.

Any time that fossil carbon burning is displaced by biomass for energy production there is net reduction in atmospheric CO2 because the biomass is a part of the short carbon cycle where regrowth reabsorbs the CO2 on the basis of a few years, while fossil CO2 is added for hundreds of years and longer.

Much of the renewable subsidy industry justified in the name of these flawed models causes net grid emissions of CO2 to be much worse for much longer than simply replacing coal with clean low carbon gas and long term inevitable base load zero carbon nuclear on the grid, unsubsidised — but that's only a generation engineering fact from the laws of physics.

At The Climate Reality Project we believe COP21 is our best chance yet to secure a strong international agreement that includes meaningful emissions reductions commitments based on national circumstances, a system of periodic review for these commitments and a long - term goal of net zero carbon emissions.

Moreover, when you then convert the three gases to a comparable unit based on their potential to warm the planet over a 100 - year time frame, the planet's biosphere works out to be a net source of greenhouse gases, causing a warming comparable to the effect of between 3.8 and 5.4 billion tons of carbon dioxide emissions per year.