Sentences with phrase «co2 drawdown»

Why carbon dioxide concentrations over the past 24 million years or so have never dropped below 200 parts per million, despite environmental conditions that have been favourable for CO2 drawdown by rock weathering and sedimentation, has always been a bit of a mystery.

No square wave, no rapid net CO2 drawdown.

Meanwhile, the avantgarde in emissions targets consists of CO2 levels lower than those presently existing, i.e. we're already in overshoot and need to achieve zero emissions and then a carbon - negative period of CO2 drawdown.

Complete restoration of deforested areas is unrealistic, yet 100 GtC carbon drawdown is conceivable because: (1) the human - enhanced atmospheric CO2 level increases carbon uptake by some vegetation and soils, (2) improved agricultural practices can convert agriculture from a CO2 ource into a CO2 sink [174], (3) biomass - burning power plants with CO2 capture and storage can contribute to CO2 drawdown.

Algae consume CO2 as carbon source, which enhances CO2 drawdown from the surface ocean and consequently from the atmosphere above.»

Regarding artificial CO2 drawdown, I am agreed that it is not very sensible to argue against it.

Or we may even have to engage in active CO2 drawdown, guaranteed to be pricier than not emitting the stuff in the first place.

Complete restoration of deforested areas is unrealistic, yet 100 GtC carbon drawdown is conceivable because: (1) the human - enhanced atmospheric CO2 level increases carbon uptake by some vegetation and soils, (2) improved agricultural practices can convert agriculture from a CO2 ource into a CO2 sink [174], (3) biomass - burning power plants with CO2 capture and storage can contribute to CO2 drawdown.

To become CO2 - negative requires replanting copses of multiple additional trees to account for the emissions from that one tree cut down, a process that can take several years or more to achieve any CO2 drawdown.

Not exact matches

So, Retallack suggests, colonization of the land by vascular and nonvascular plants together may help explain the massive drawdown of CO2 that triggered the most recent and stronger of the two major glaciations that Lenton and his colleagues studied.

«So you could say that by limiting the drawdown of CO2 by chemical weathering and sedimentation, plants saved the planet from freezing over,» says Caldeira.

Project Drawdown calculated that together, these would reduce CO2 emissions by 120 gigatons by 2050 — more than onshore and offshore wind power combined.

He believes geo - engineering and carbon drawdown, removing CO2 from the atmosphere, for example, are ways out of the quagmire.

Weathering drawdown of CO2?

Recent research has uncovered evidence for lower ocean temperatures during the Ordovician than previously thought, creating ideal conditions for a huge spurt in marine biodiversity and correspondingly large drawdown of CO2 from the atmosphere through carbon burial in the ocean.

The iceberg delivery of sediment containing nanoparticulate Fe during the Last Glacial Maximum (18000 — 21000 years ago) may have been sufficient to fertilize the increase in productivity required to drawdown CO2 to the levels observed in ice cores [9].

A global drawdown in CO2 is just one theory proposed for the transition.

In Wills article he says: - «because of the seasonally varying drawdown of CO2 by plant life and the seasonal temperature variations.

As shown by our simulations with a climate − carbon cycle model, such a relationship between dust and climate implies that dust - induced cooling is responsible for the final step from intermediate to extreme glacial cooling and drawdown of atmospheric CO2 concentrations.

Potential carbon dioxide (CO2) drawdown through dust - induced iron fertilization of ocean biota is restricted to high - nutrient, low - chlorophyll (HNLC) regions, mainly the Southern Ocean and northern Pacific where iron is the limiting micronutrient (6, 13).

The technology for «atmospheric drawdown and sequestration» is called organic agriculture and reforestation, which can draw down the already dangerous anthropogenic excess of CO2 and sequester it in soil and biomass.

While controlled iron fertilization experiments have shown an increase in phytoplankton growth, and a temporary increase in drawdown of atmospheric CO2, it is uncertain whether this would increase carbon transfer into the deep ocean over the longer - term.

Here we probe the system to determine whether certain regions of the Southern Ocean are more critical than others for air — sea CO2 balance and the biological export production, by increasing surface nutrient drawdown in an ocean general circulation model.