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New research special - methane papers 2010-2011

Posted on 17 July 2012 by Ari Jokimäki

New research from last week series started in Skeptical Science at the beginning of 2012. Before this the series had been running for a year and a half in AGW Observer blog. Now, as new research series is having a summer break, we take a peek back to 2010 and 2011 papers in the series. We have four different posts that all contain all the papers included in the new research series during 2010 and 2011 on certain subject.

Subject of the week is methane. Several issues relating to methane are currently interesting and important for the future. Has atmospheric methane concentration started to increase after plateauing for a decade? What are the most important methane emission sources with warming climate? Are methane hydrates something we should worry about? Below you will find all methane papers that were included in the new research series during 2010 and 2011.

Recent atmospheric methane trends and their causes

Source attribution of the changes in atmospheric methane for 2006–2008 - Bousquet et al. (2011)

Long-term analysis of carbon dioxide and methane column-averaged mole fractions retrieved from SCIAMACHY - Schneising et al. (2011)

Global column-averaged methane mixing ratios from 2003 to 2009 as derived from SCIAMACHY: Trends and variability - Frankenberg et al. (2011)

Interannual variability and trends in atmospheric methane over the western Pacific from 1994 to 2010 - Terao et al. (2011)

Methane hydrates

Methane hydrate-bearing seeps as a source of aged dissolved organic carbon to the oceans - Pohlman et al. (2010)

Gas escape features off New Zealand: Evidence of massive release of methane from hydrates - Davy et al. (2010)

Massive methane release triggered by seafloor erosion offshore southwestern Japan - Bangs et al. (2010)

Repeated pulses of vertical methane flux recorded in glacial sediments from the southeast Bering Sea - Cook et al. (2011)

Rising Arctic Ocean temperatures cause gas hydrate destabilization and ocean acidification - Biastoch et al. (2011)

Contribution of Oceanic Gas Hydrate Dissociation to the Formation of Arctic Ocean Methane Plumes - Reagan et al. (2011)

Other issues

Possible role of wetlands, permafrost, and methane hydrates in the methane cycle under future climate change: A review - O'Connor et al. (2010)

Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming - Tian et al. (2011)

Strong atmospheric chemistry feedback to climate warming from Arctic methane emissions - Isaksen et al. (2011)

A high arctic soil ecosystem resists long-term environmental manipulations - Lamb et al. (2011)

Can natural or anthropogenic explanations of late-Holocene CO2 and CH4 increases be falsified? - Ruddiman et al. (2011)

Future changes in global warming potentials under representative concentration pathways - Reisinger et al. (2011)

What prevents outgassing of methane to the atmosphere in Lake Tanganyika? - Durisch-Kaiser et al. (2011)

Regional methane emission from West Siberia mire landscapes - Glagolev et al. (2011)

Bubbles trapped in arctic lake ice: Potential implications for methane emissions - Wik et al. (2011)

The Rate of Permafrost Carbon Release Under Aerobic and Anaerobic Conditions and its Potential Effects on Climate - Lee et al. (2011)

Large methane releases lead to strong aerosol forcing and reduced cloudiness - Kurtén et al. (2011)

An agronomic assessment of greenhouse gas emissions from major cereal crops - Linquist et al. (2011)

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Comments

Comments 1 to 6:

  1. There have been recent reports that U.S. CO2 emissions have started to decline largely because of increased reliance on natural gas in power plants at the expense of coal (and the Great Recession). Does anyone know if U.S. methane emissions have changed in the past few years?
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  2. There are two recent papers by a Turkish group on (increasing) energy sector emissions:

    Methane emission by sectors: A comprehensive review of emission sources and mitigation methods

    Sources and mitigation of methane emissions by sectors: A critical review

    An then there is the Colorado front range study in JGR:
    Petron et al. Hydrocarbon emissions characterization in the Colorado Front Range: A pilot study
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  3. EPA have a table showing figures for US methane emissions sources at various intervals between 1990 and 2009.

    From these data I can't see any clear trend.
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  4. pauls The US is only a small part of the world, so it isn't necessarily surprising that there would be a global trend, without there being a conspicuous trend in the US, especially if the US has been making an effort to curb methane emissions.

    Further down the document it mentions natural methane emissions of 208 Tg, which if I have worked it out correctly is equivalent to 3,900 Tg CO2 equivalent, which is much larger than the US manmade component.
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  5. Dikran Marsupial - I was responding to Mike and his question about US methane emissions.
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  6. @pauls sorry, hope Mike finds the caveat worthwhile then!
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