Australian Politics Forum - methane emissions

Unforgiven

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Re: methane emissions - What's New?
Reply #15 - Jul 21^st, 2017 at 6:57pm

lee wrote on Jul 21^st, 2017 at 6:45pm:

Tropical soils are probably the single most important source of N2O to the atmosphere (Prather et al., 1995), and intensification of tropical agriculture is likely to increase this (Matson & Vitousek, 1990). The current IPCC (1995) estimate for N2O emissions from tropical soils is 4Mt/a (nitrogen), 75% from wet forests soils and 25% from dry savannahs. Temperate soil sources (including forest soils and grasslands) have been estimated at about 2Mt/a. The Earth's oceans are significant sources of N2O. Emissions may be larger than previously estimated (Law & Owen, 1990), accounting for 3Mt/a.

Anthropogenic sources may account for about 40% of total N2O emissions (5.7Mt/a). These include cultivated soils, biomass burning and industrial sources (e.g. nylon production). Total source emissions (natural and anthropogenic) are currently estimated at 14.7Mt/a ( 3.5Mt/a).

http://www.global-climate-change.org.uk/6-4-3-1.php

Natural? From tropical sources? Oceans? Oh dear.

You forgot lee's anus which is a contributor of CH4 and H2S.

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Jovial Monk Gold Member Offline Dogs not cats! Posts: 51474 Gender:	Re: methane emissions - What's New? Reply #16 - Jul 21^st, 2017 at 7:00pm Some of the natural sources are emitting or emitting faster because of AGW, perhaps. E.g. warmer water can hold less solids and gases in solution than cold water.
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TheFunPolice Gold Member Offline Australian Politics Posts: 9009 waggawagga Gender:	Re: methane emissions - What's New? Reply #17 - Jul 22^nd, 2017 at 3:06pm Grendel wrote on Jul 21^st, 2017 at 6:32pm: Wassup.... I've made Methanol and Methane and many other organic chemicals. Looks to me like you are both clueless about Methane and how it could be affecting the atmosphere and its makeup, etc. You're a blowhard!!
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TheFunPolice Gold Member Offline Australian Politics Posts: 9009 waggawagga Gender:	Re: methane emissions - What's New? Reply #18 - Jul 22^nd, 2017 at 3:08pm Grendel wrote on Jul 21^st, 2017 at 6:54pm: That can't be right. Mankind is creating matter and putting stuff into the atmosphere that never existed on the planet before. Thought I'd just beat Monk to it for a change. Random words for no apparent reason
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TheFunPolice Gold Member Offline Australian Politics Posts: 9009 waggawagga Gender:	Re: methane emissions - What's New? Reply #19 - Jul 22^nd, 2017 at 3:11pm Jovial Monk wrote on Jul 21^st, 2017 at 6:54pm: about 40% not natural. didn’t mention rising emissions N2O at the poles. Couldn't find a date on lees link!
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The_Barnacle Gold Member Offline Australian Politics Posts: 6205 Melbourne Gender:	Re: methane emissions - What's New? Reply #20 - Jul 23^rd, 2017 at 12:16pm Methane is a more potent greenhouse gas than CO2 (any gas molecule with more than 2 atoms is a greenhouse gas) but there is simply far less of it in the atmosphere. CO2 is about 400 parts per million. CH4 is less than 2 parts per million. Increases in CH4 are largely due to agriculture which is a human activity.
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Jovial Monk Gold Member Offline Dogs not cats! Posts: 51474 Gender:	Re: methane emissions - What's New? Reply #21 - Jul 23^rd, 2017 at 12:20pm And polar tundras, as they thaw out.
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lee Gold Member Offline Australian Politics Posts: 21541 Gender:	Re: methane emissions - What's New? Reply #22 - Jul 23^rd, 2017 at 12:33pm "NOAA’s Climate.gov Says Natural Wetlands, Tropical Agriculture Responsible For Methane Increases, Not Oil and Gas" http://westernwire.net/noaas-climate-gov-says-natural-wetlands-tropical-agricult... https://www.climate.gov/news-features/understanding-climate/after-2000-era-plate...
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Grendel Gold Member Offline OzPolitic Posts: 28080 Gender:	Re: methane emissions - What's New? Reply #23 - Jul 23^rd, 2017 at 3:43pm Jovial Monk wrote on Jul 23^rd, 2017 at 12:20pm: And polar tundras, as they thaw out. LOL... that is so funny, the irony is you don't even get it.
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TheFunPolice

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Re: methane emissions - What's New?
Reply #24 - Jul 24^th, 2017 at 2:17pm

The_Barnacle wrote on Jul 23^rd, 2017 at 12:16pm:

Methane is a more potent greenhouse gas than CO2 (any gas molecule with more than 2 atoms is a greenhouse gas) but there is simply far less of it in the atmosphere. CO2 is about 400 parts per million. CH4 is less than 2 parts per million. Increases in CH4 are largely due to agriculture which is a human activity.

I don't know what the data is on methane but I'm sure the change so far is inconsequential. The rate of change is what is important so some type of graph would be good to look at! I suppose the numbers aren't in, basically!

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