A unified explanation for the morphology of raised peatlands

Alexander R. Cobb (), René Dommain, Kimberly Yeap, Cao Hannan, Nathan C. Dadap, Bodo Bookhagen, Paul H. Glaser and Charles F. Harvey
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Alexander R. Cobb: Singapore-MIT Alliance for Research and Technology (SMART)
René Dommain: Nanyang Technological University
Kimberly Yeap: Nanyang Technological University
Cao Hannan: Nanyang Technological University
Nathan C. Dadap: Stanford University
Bodo Bookhagen: University of Potsdam
Paul H. Glaser: University of Minnesota
Charles F. Harvey: Singapore-MIT Alliance for Research and Technology (SMART)

Nature, 2024, vol. 625, issue 7993, 79-84

Abstract: Abstract Raised peatlands, or bogs, are gently mounded landforms that are composed entirely of organic matter1–4 and store the most carbon per area of any terrestrial ecosystem5. The shapes of bogs are critically important because their domed morphology4,6,7 accounts for much of the carbon that bogs store and determines how they will respond to interventions8,9 to stop greenhouse gas emissions and fires after anthropogenic drainage10–13. However, a general theory to infer the morphology of bogs is still lacking4,6,7. Here we show that an equation based on the processes universal to bogs explains their morphology across biomes, from Alaska, through the tropics, to New Zealand. In contrast to earlier models of bog morphology that attempted to describe only long-term equilibrium shapes4,6,7 and were, therefore, inapplicable to most bogs14–16, our approach makes no such assumption and makes it possible to infer full shapes of bogs from a sample of elevations, such as a single elevation transect. Our findings provide a foundation for quantitative inference about the morphology, hydrology and carbon storage of bogs through Earth’s history, as well as a basis for planning natural climate solutions by rewetting damaged bogs around the world.

Date: 2024
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DOI: 10.1038/s41586-023-06807-w

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