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\begin{document}

\title{Time, hydrologic landscape and the long-term storage of peatland carbon
in sedimentary basins}



\author[1]{David J Large}%
\author[2]{Chris Marshall}%
\author[3]{Malte Jochmann}%
\author[3]{Maria Jensen}%
\author[4]{Baruch Spiro}%
\author[3]{Snorre Olaussen}%
\affil[1]{University of Nottingham}%
\affil[2]{University of the Highlands and Islands}%
\affil[3]{University Centre in Svalbard(UNIS)}%
\affil[4]{Department of Mineralogy, Natural History Museum}%


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  \date{June 10, 2024}


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\begin{abstract}
Peatland carbon may enter long-term storage in sedimentary basins
preserved as either coal or lignite. To understand the process by which
this happens requires extrapolation of our understanding of peatland
carbon accumulation over timescales that greatly exceed those of
Holocene peat. By applying this extrapolation, we deduce that the amount
of time required to account for the carbon in 1 -- 10 m thick coal seams
must represent 105 to 106 years, an order of magnitude more than assumed
in current interpretations of stratigraphic frameworks. Extrapolating
peat growth to periods of 106 years requires consideration of the
conditions of landscape, hydrology, accommodation space and crustal
deformation required to ensure the sustained growth and accommodation of
peat deposits. We conclude that the generation of accommodation space at
low rates (0.1 to 0.2 mm/yr) can adequately accommodate thick peat
accumulation over periods \textgreater{}105 yrs. However, generation of
accommodation space at high rates (\textgreater{}1mm/yr) cannot
accommodate significant peat accumulation. Key to this process is the
maintenance of a saturated peat body above the level of clastic
deposition. This long-term stability of the system has implications for
our understanding of the processes that limit peatland growth under very
low accommodation rates and the long-term validity of current peat
growth models.%
\end{abstract}%



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