Methane emissions partially offset "blue carbon" burial in mangroves.

Abstract:

:Organic matter burial in mangrove forests results in the removal and long-term storage of atmospheric CO2, so-called "blue carbon." However, some of this organic matter is metabolized and returned to the atmosphere as CH4. Because CH4 has a higher global warming potential than the CO2 fixed in the organic matter, it can offset the CO2 removed via carbon burial. We provide the first estimate of the global magnitude of this offset. Our results show that high CH4 evasion rates have the potential to partially offset blue carbon burial rates in mangrove sediments on average by 20% (sensitivity analysis offset range, 18 to 22%) using the 20-year global warming potential. Hence, mangrove sediment and water CH4 emissions should be accounted for in future blue carbon assessments.

journal_name

Sci Adv

journal_title

Science advances

authors

Rosentreter JA,Maher DT,Erler DV,Murray RH,Eyre BD

doi

10.1126/sciadv.aao4985

subject

Has Abstract

pub_date

2018-06-13 00:00:00

pages

eaao4985

issue

6

issn

2375-2548

pii

aao4985

journal_volume

4

pub_type

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