Sentences with phrase «where higher methane»
So far our data do not show any evidence for rapid water contamination, as we do not see evidence of these diluted brines (type D water) associated with distance to natural gas wells (the Osborn 2011 paper) in wells where higher methane concentrations were observed.
https://dotearth.blogs.nytimes.com/ Not exact matches
No random sampling; authors appear to have simply cherry - picked water wells previously known to have high concentrations of methane, although they never actually mention in the report which wells they sampled or where they're located: «Jackson said the study was indeed not random, but that was because they needed homeowners permission to test their water.»
Worldwide, particularly in deeply buried permafrost and in high - latitude ocean sediments where pressures are high and temperatures are below freezing, icy deposits called hydrates hold immense amounts of methane (SN: 6/25/05, p. 410).
The process is thought to begin in the high atmosphere, at altitudes above 400 kilometers (250 miles), where ultraviolet light breaks down methane and nitrogen molecules.
On Earth, certain microbes living in the dark, high - pressure depths of the ocean where oxygen is scarce actually consume hydrogen and carbon dioxide, producing methane in the process.
This is about as far as one could get from high levels (relative to most atmospheric concentrations) of methane over large areas high in the atmosphere in the Arctic where there is very little (direct) human activity.
In the Arctic, the tipping points identified in the new report, published on Friday, include: growth in vegetation on tundra, which replaces reflective snow and ice with darker vegetation, thus absorbing more heat; higher releases of methane, a potent greenhouse gas, from the tundra as it warms; shifts in snow distribution that warm the ocean, resulting in altered climate patterns as far away as Asia, where the monsoon could be effected; and the collapse of some key Arctic fisheries, with knock - on effects on ocean ecosystems around the globe.»
«Methane migration through the 1 - to 2 - km - thick geological formations that overlie the Marcellus and Utica shales is less likely as a mechanism for methane contamination than leaky well casings, but might be possible due to both the extensive fracture systems reported for these formations and the many older, uncased wells drilled and abandoned over the last century and a half in Pennsylvania and New York [where they did their study]... More research is needed across this and other regions to determine the mechanism (s) controlling the higher methane concentrations we observed.Methane migration through the 1 - to 2 - km - thick geological formations that overlie the Marcellus and Utica shales is less likely as a mechanism for methane contamination than leaky well casings, but might be possible due to both the extensive fracture systems reported for these formations and the many older, uncased wells drilled and abandoned over the last century and a half in Pennsylvania and New York [where they did their study]... More research is needed across this and other regions to determine the mechanism (s) controlling the higher methane concentrations we observed.methane contamination than leaky well casings, but might be possible due to both the extensive fracture systems reported for these formations and the many older, uncased wells drilled and abandoned over the last century and a half in Pennsylvania and New York [where they did their study]... More research is needed across this and other regions to determine the mechanism (s) controlling the higher methane concentrations we observed.methane concentrations we observed.»
NATURALLY OCCURRING METHANE CAPTURE — Methane emissions may occur from land areas where coal or other high concentrations of un-extracted fossil fuels are present underground, resulting in a naturally occurring source of greenhouse gas (GHG) emiMETHANE CAPTURE — Methane emissions may occur from land areas where coal or other high concentrations of un-extracted fossil fuels are present underground, resulting in a naturally occurring source of greenhouse gas (GHG) emiMethane emissions may occur from land areas where coal or other high concentrations of un-extracted fossil fuels are present underground, resulting in a naturally occurring source of greenhouse gas (GHG) emissions.
Methane and co2 levels have been many times higher in the past and even if the entirety of the Worlds know fossil fuel reserves where released into the atmosphere we still would not get back to those levels.
Thawing permafrost also delivers organic - rich soils to lake bottoms, where decomposition in the absence of oxygen releases additional methane.116 Extensive wildfires also release carbon that contributes to climate warming.107, 117,118 The capacity of the Yukon River Basin in Alaska and adjacent Canada to store carbon has been substantially weakened since the 1960s by the combination of warming and thawing of permafrost and by increased wildfire.119 Expansion of tall shrubs and trees into tundra makes the surface darker and rougher, increasing absorption of the sun's energy and further contributing to warming.120 This warming is likely stronger than the potential cooling effects of increased carbon dioxide uptake associated with tree and shrub expansion.121 The shorter snow - covered seasons in Alaska further increase energy absorption by the land surface, an effect only slightly offset by the reduced energy absorption of highly reflective post-fire snow - covered landscapes.121 This spectrum of changes in Alaskan and other high - latitude terrestrial ecosystems jeopardizes efforts by society to use ecosystem carbon management to offset fossil fuel emissions.94, 95,96
Their was a study done by NOAA on the air quality in Erie Colorado, close to my home where their is lots of wells, and it stated that they found levels of Methane, butane and some other carcinogenic chemicals in the air were higher then levels in big cities like Houston Texas and Pasadena California.
«Methane in soils seem to follow a temperature gradient where higher temperatures are related to higher uptake of methane but that's not necessarily the case for coarse woody debris or for tree trunks,» says Rodrigo Vargas of the Department of Plant and Soil Sciences at the University of Delaware, who led theMethane in soils seem to follow a temperature gradient where higher temperatures are related to higher uptake of methane but that's not necessarily the case for coarse woody debris or for tree trunks,» says Rodrigo Vargas of the Department of Plant and Soil Sciences at the University of Delaware, who led themethane but that's not necessarily the case for coarse woody debris or for tree trunks,» says Rodrigo Vargas of the Department of Plant and Soil Sciences at the University of Delaware, who led the study.
Watch it from there if you like or you can jump to 1:11:35 and see a red dot she's pointing to on a map where there have been high levels of methane emissions from the Gekkal Ridge.
R&D ers have been talking up natural gas extraction from methane hydrates — a solid form of the greenhouse gas, found tucked away beneath the sea floor where low temperature and high pressure keep it stable.
Naturally Occurring Methane Capture Carbon Offsets — Methane emissions may occur from land areas where coal or other high concentrations of un-extracted fossil fuels are present underground, resulting in a naturally occurring source of GHG emissions.
As can be seen, methane is somewhat higher over the northern hemisphere where most of the methane sources are located.
There are probably «blooms» of methanotrophs where the concentrations are high, and mixed populations of microbes of wildly varing composition across the methane / oxygen / temperature gradients.