Modelling northern peatland microtopography and hydrology
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منابع مشابه
A multi-scale remote sensing approach for monitoring northern peatland hydrology: present possibilities and future challenges.
Remote sensing has the potential to provide quantitative spatially explicit hydrological information across northern peatland complexes. This paper details a multi-scale remote sensing approach for assessing the use of Sphagnum mosses as proxy indicators of near-surface hydrology. Several spectral indices developed from the near infra-red (NIR) and shortwave infra-red (SWIR) liquid water absorp...
متن کاملDirect Human Impacts on the Peatland Carbon Sink
Northern peatlands occupy over 3 million km2 globally and contain the largest carbon (C) pool (typically >100 kg C m-2) among terrestrial ecosystems. Agri culture, forestry, and peat harvesting are the principal humaninduced activities that alter the peatland and hence the distribution and flux of carbon. As a prerequisite to those uses, the peatland is usually drained, which has longterm ef...
متن کاملResponses of carbon dioxide flux and plant biomass to water table drawdown in a treed peatland in northern Alberta: a climate change perspective
Northern peatland ecosystems represent large carbon (C) stocks that are susceptible to changes such as accelerated mineralization due to water table lowering expected under a climate change scenario. During the growing seasons (1 May to 31 October) of 2011 and 2012 we monitored CO2 fluxes and plant biomass along a microtopographic gradient (hummocks-hollows) in an undisturbed dry continental bo...
متن کاملThe base ̄ow and storm ̄ow hydrology of a precambrian shield headwater peatland
A hydrological investigation was conducted in a small headwater peatland located in the Experimental Lakes Area, north-western Ontario, Canada, to determine the subsurface and surface ̄ow paths within the peatland, and between the peatland and an adjacent forested upland during base ̄ow and storm ̄ow conditions. Distinct zones of groundwater recharge and discharge were observed within the peatla...
متن کاملPeatland hydrology and carbon release: why small-scale process matters.
Peatlands cover over 400 million hectares of the Earth's surface and store between one-third and one-half of the world's soil carbon pool. The long-term ability of peatlands to absorb carbon dioxide from the atmosphere means that they play a major role in moderating global climate. Peatlands can also either attenuate or accentuate flooding. Changing climate or management can alter peatland hydr...
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