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An integrative framework linking global wetland data sets with methane-flux observations from wetland field sites: development and testing of a methane-centric wetland classification system with boreal observations

Matthews, Elaine; Gauci, Vincent; Nilsson, Mats and Prigent, Catherine (2009). An integrative framework linking global wetland data sets with methane-flux observations from wetland field sites: development and testing of a methane-centric wetland classification system with boreal observations. In: 2nd International Symposium on Peatlands in the Global Carbon Cycle , 25-30 September 2009, Prague, Czech Republic.

URL: http://www.peatnet.siu.edu/CC09MainPage.html
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Abstract

Natural wetlands are the world's largest source of methane to the atmosphere. Boreal wetlands, dominated by peatlands, account for about 50% of global wetland area and ~35% of wetland methane emissions; about half the world's lakes are in boreal regions, often closely associated with peatlands and other wetlands. These environments are currently undergoing substantial warming which is predicted to continue, together with more uncertain changes in precipitation and hydrological dynamics. Understanding climate sensitive processes prevailing in the world's natural wetlands is crucial to understanding and predicting their biogeochemical responses to interannual and longer-term climate variations. Modeling the distribution and dynamics of methane-producing wetlands/peatlands remains a fundamental challenge in this research. For example climate, which has been employed in attempts to model where wetlands occur, is not the major determinant of wetland distribution. Consequently wetland-methane models must be applied to an externally-defined wetland data sets that may or may not provide methane-relevant information about vegetation and environmental characteristics. Several hundred published papers report methane fluxes for a broad array of methane-producing ecosystems, most with environmental information about field conditions, vegetation, soils, hydrology etc. However, these flux data are minimally employed in analyzing and modeling interrelationships among methane flux, climate and environmental characteristics because 1) the observations are dispersed throughout printed papers which has discouraged researchers from making the effort to mine them and 2) no framework exists to connect methane and environmental observations with wetland data sets or model representations of wetlands and methane-related processes. To bridge this disconnect, we initiated a project to develop a single system to classify 1) wetland ecosystems in a digital data base and 2) wetland ecosystems and their methane fluxes published in the literature. We present initial work on the methane-centric classification system and apply the classification to boreal ecosystems/flux observations to investigate variability and patterns in ecosystem methane fluxes.

Item Type: Conference Item
Copyright Holders: 2009 The Authors
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: OpenSpace Research Centre (OSRC)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
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Item ID: 32608
Depositing User: Vincent Gauci
Date Deposited: 01 Mar 2012 13:43
Last Modified: 16 Nov 2012 16:35
URI: http://oro.open.ac.uk/id/eprint/32608
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