Sentences with phrase «atmospheric methane used»

The baseline for atmospheric methane used in the study is just under two parts per million — a figure accepted by most experts as well within the range of naturally occurring gas levels.

Not exact matches

In the new paper, published in the journal Environmental Research Letters, Höglund - Isaksson estimated global methane emissions from oil and gas systems in over 100 countries over a 32 - year period, using a variety of country - specific data ranging from reported volumes of associated gas to satellite imagery that can show flaring, as well as atmospheric measurements of ethane, a gas which is released along with methane and easier to link more directly to oil and gas activities.

On March 19, 2008, astronomers using the Hubble Space Telescope announced confirmation of the presence of water and the detection of more methane in the atmosphere of the planet than would be predicted by conventional atmospheric models for «hot Jupiters» (Hubble news release and videos; ESA news release and videos; and Swain et al, 2008 — more below).

Here we present a chronology for the deep part of the core (67.8 - 31.2 ka BP), which is based on stratigraphic matching to annual - layer - counted Greenland ice cores using globally well - mixed atmospheric methane.

Also, atmospheric measurements of the amounts of methane released by permafrost (a top - down approach) are far less than estimates of these amounts made using point - based field assessments and ecosystem modeling (bottom - up approaches).

We find (i) measurements at all scales show that official inventories consistently underestimate actual CH4 [methane] emissions, with the natural gas and oil sectors as important contributors; (ii) many independent experiments suggest that a small number of «super-emitters» could be responsible for a large fraction of leakage; (iii) recent regional atmospheric studies with very high emissions rates are unlikely to be representative of typical natural gas system leakage rates; and (iv) assessments using 100 - year impact indicators show system - wide leakage is unlikely to be large enough to negate climate benefits of coal - to - natural gas substitution.

Alaska Arctic Tundra CH4 Flux Study — Impacts of AGW / CC Published 8 - Jan 2018 Estimating regional - scale methane flux and budgets using CARVE aircraft measurements over Alaska Conclusions Analysis of CH4 column enhancements supplemented by simulated atmospheric transport allowed us to estimate the monthly - mean CH4 fluxes from our study domain (50 — 75 N, 130 — 170 W).

Using the modtran model on line I get a radiative forcing from 10 * atmospheric methane of 3.4 Watts / m2 (the difference in the instantaneous IR flux out, labeled Iout, between cases with and without 10x methane).

Using SCIAMACHY satellite data as well as ground - based measurements from 2003 to 2009, researchers found that the region where Arizona, New Mexico, Colorado, and Utah intersect had atmospheric methane concentrations equivalent to about 1.3 million pounds of emissions a year.

Instead atmospheric physics uses the fundamental equations (the radiative transfer equations) which determine absorption and emission of radiation by water vapor, CO2, methane, and other trace gases.

AK: «Using atmospheric CO2 to produce methane or other fuels will almost certainly turn out to be a winner.»

That just proves that human use of natural gas has nothing measurable to do with atmospheric methane levels.

If permafrost soils begin to release climatically significant amounts of methane, it should be detectable through monitoring atmospheric concentrations of methane using a network of monitoring stations around the world, but the current network is too sparse.

Here we quantify the processes that controlled variations in methane emissions between 1984 and 2003 using an inversion model of atmospheric transport and chemistry.

The most significant is that the UT Austin study looked only at the production stage of natural gas, while the Harvard study used atmospheric measurements to estimate methane emissions from all sources.

The study's authors, led by researchers from Harvard University, used atmospheric measurements of methane — a greenhouse gas at least 25 times as powerful at trapping heat as CO2 — from aircraft and stationary towers.

The researchers were able to discern agricultural methane from other sources of methane by looking at the gas» isotopic signatures — or the ratio of various carbon isotopes — using data from atmospheric monitoring stations around the world.

If you are interested I am proposing a method of producing methane from solar energy using atmospheric CO2.