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|a Constraints on the Late Holocene Anthropogenic Contribution to the Atmospheric Methane Budget |h [electronic resource]. |
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|a [S.l.] : |b American Association for the Advancement of Science, |c 2013-11-22. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a The origin of the late preindustrial Holocene (LPIH) increase in atmospheric methane concentrations
has been much debated. Hypotheses invoking changes in solely anthropogenic sources or solely natural
sources have been proposed to explain the increase in concentrations. Here two high-resolution,
high-precision ice core methane concentration records from Greenland and Antarctica are presented and
are used to construct a high-resolution record of the methane inter-polar difference (IPD). The IPD record
constrains the latitudinal distribution of emissions and shows that LPIH emissions increased primarily
in the tropics, with secondary increases in the subtropical Northern Hemisphere. Anthropogenic and
natural sources have different latitudinal characteristics, which are exploited to demonstrate that both
anthropogenic and natural sources are needed to explain LPIH changes in methane concentration. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15052504/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/05/25/04/00001/FI15052504_thm.jpg |
