Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/39532
Title: High permeability explains the vulnerability of the carbon store in drained tropical peatlands
Authors: Baird, Andy J.
Low, Robert
Young, Dylan
Swindles, Graeme T.
Lopez, Omar R.
Page, Susan E.
First Published: 25-Jan-2017
Publisher: American Geophysical Union (AGU)
Citation: Geophysical Research Letters, 2017, 44 (3), pp. 1333–1339
Abstract: Tropical peatlands are an important global carbon (C) store but are threatened by drainage for palm oil and wood pulp production. The store's stability depends on the dynamics of the peatland water table, which in turn depend on peat permeability. We found that an example of the most abundant type of tropical peatland-ombrotrophic domes-has an unexpectedly high permeability similar to that of gravel. Using computer simulations of a natural peat dome (NPD) and a ditch-drained peat dome (DPD) we explored how such high permeability affects water tables and peat decay. High permeability has little effect on NPD water tables because of low hydraulic gradients from the center to the margin of the peatland. In contrast, DPD water tables are consistently deep, leaving the upper meter of peat exposed to rapid decay. Our results reveal why ditch drainage precipitates a rapid destabilization of the tropical peatland C store.
DOI Link: 10.1002/2016GL072245
ISSN: 0094-8276
eISSN: 1944-8007
Links: http://onlinelibrary.wiley.com/doi/10.1002/2016GL072245/full
http://hdl.handle.net/2381/39532
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © the authors, 2017. This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Geography

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