Upscaling methane emission hotspots in boreal peatlands
Upscaling the properties and effects of small-scale surface heterogeneities to larger scales is a challenging issue in land surface modeling. We developed a novel approach to upscale local methane emissions in a boreal peatland from the micro-topographic scale to the landscape scale. We based this n...
Main Authors: | , , , , |
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Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2016-03-01
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Series: | Geoscientific Model Development |
Online Access: | http://www.geosci-model-dev.net/9/915/2016/gmd-9-915-2016.pdf |
Summary: | Upscaling the properties and effects of small-scale surface heterogeneities
to larger scales is a challenging issue in land surface modeling. We
developed a novel approach to upscale local methane emissions in a boreal
peatland from the micro-topographic scale to the landscape scale. We based
this new parameterization on the analysis of the water table pattern
generated by the Hummock–Hollow model, a micro-topography resolving model
for peatland hydrology. We introduce this parameterization of methane
hotspots in a global model-like version of the Hummock–Hollow model that
underestimates methane emissions. We tested the robustness of the
parameterization by simulating methane emissions for the next century,
forcing the model with three different RCP scenarios. The
Hotspot
parameterization, despite being calibrated for the 1976–2005 climatology,
mimics the output of the micro-topography resolving model for all the
simulated scenarios. The new approach bridges the scale gap of methane
emissions between this version of the model and the configuration explicitly
resolving micro-topography. |
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ISSN: | 1991-959X 1991-9603 |