Greenhouse carbon balance of wetlands: Methane emission versus Carbon sequestration[J]. Tellus Series B Chemical and Physical Meteorology, 2001, 53: 521-528.J. G. Whiting, J. P. Chanton, Greenhouse Carbon Balance of Wetlands: Methane Emission versus Carbon Sequestration, Tellus 2001, 53B, 521-...
While CO2 remains in the atmosphere for centuries, methane breaks down after about a decade - meaning it has less of a long-term impact on temperatures. Scientists normally compare the overall warming effects of methane versus CO2 ove...
The atmospheric concentration of CO2 is about 350 parts per million by volume (ppmv) and is increasing at a yearly rate of about 1 ppmv. [A plot of the CO2 concentration versus time is given in Figure 5 .1 in Chapter 5.] Fossil fuel combustion is the major source of carbon ...
103 Pressure (bar) CO2 CH4 104 105 b b a c b c 0.3 0.2 0.1 0.0 0.0 CO2/CH4 = (70/30) (P,T ) = (70 bar, 300 K) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Adsorbed CH4 loading (mol kg–1) Figure 3 | Molar concentration of CH4 in the adsorbed phase versus CH4 loading in ...
suggesting that the warming destabilized gas hydrates and released a large burb of methane. Given that methane has 20 times the impact of CO2 as a greenhouse gas, such a release could have accelerated global warming at that time. This discovery supports concerns of potential destabilization of m...
A cornerstone of our understanding of the contemporary global carbon cycle is that the terrestrial land surface is an important greenhouse gas (GHG) sink (1, 2). The global land sink is estimated to be 2.6 + 1.7 Pg of C year~(-1) (variability ± range, excluding C emissions because of...
Despite the fact that methane stays in the atmosphere for far less time than carbon dioxide – 10 versus 300 years – methane’s molecular structure makes it 30 times more capable of warming the atmosphere than CO2. Higher temperatures not only enhance microbial activity of methane-releasing micro...
Recently stringent environmental regulations limiting the emissions of pollutants and the continuing decline in the quality of petroleum feedstocks have made conversion and utilization of carbon dioxide (CO2) and methane (CH4), two important greenhouse gases (GHG), one of the paramount problems in chem...
[16]. The dry reforming of methane, DRM, (Equation (1)) is an environmentally friendly process since it helps to the reutilization of CH4 and CO2, which are two greenhouse effect gases [17,18,19]. The low-temperature DRM yields syngas with a H2/CO ratio lower than unity [20,21]. ...
these findings also challenge our current understanding and highlight the importance of MOx in methane cycling in shallow near-shore waters. Although the relative importance of ventilation versus MOx may vary depending on physical mixing or meteorological conditions at an individual site, on a global ...