Presentation on theme: "Peatlands and Greenhouse Gas Emissions Mark Cooper, Chris Evans, Piotr Zielinski, Tim Jones, Annette Burden, Mike Peacock, Chris Freeman, Mike Billett,"— Presentation transcript:
Peatlands and Greenhouse Gas Emissions Mark Cooper, Chris Evans, Piotr Zielinski, Tim Jones, Annette Burden, Mike Peacock, Chris Freeman, Mike Billett, Nick Ostle, Pete Levy, Kerry Dinsmore, et al.
Talk Structure CEH Carbon Catchment Project Effects of drainage ditch blocking Effects of atmospheric deposition Acknowledging CEH, WCCL and Bangor University
UK Soil C Auchencorth Moss Moor House Forsinard Upper Conwy CEH ‘Carbon Catchments’ Ecosystem carbon balance being measured at four peat catchments (land-atmosphere and dissolved C fluxes) Experimental components: –Drained/undrained (Forsinard) –Burnt/unburnt (Moor House) –High/low nitrogen deposition (Auchencorth) –High/low acid deposition (Conwy)
Carbon Catchments Baseline monitoring Migneint Moor House Auchencorth Forsinard
CARBON BALANCE CO 2 Exchange Methane Dissolved Gases Dissolved Carbon Main Peatland Carbon Fluxes
Site Net CO 2 exchange CH 4 DICDOCPOC Net C balance Mer Bleue, Quebec Degerö Stormyr, N. Sweden Glencar, SW Ireland 7, Auchencorth, E. Scotland 3,4 -115<115* Moor House, N. England Migneint, N. Wales 51191
Carbon Catchment: Nant Y Brwyn Upland Blanket bog which forms part of the Migneint Nant Y Brwyn is approx 1.68km 2 Mean annual rainfall is approximately 2200 mm yr –1 Mean annual temperature is 5.6°C Main vegetation consists of Calluna, Juncus, Sphagnum, Eriophorum Light grazing between May and October
Carbon Catchment: Nant Y Brwyn Flux Tower Automated Weather Station Static Gas Chamber sampling Automated River Monitoring Complete carbon budget is still a working progress
Landscape Scale Aerial Photography Field Surveys High Resolution LiDAR
Nant Y Brwyn Riparian Juncus flush covers 12% & contributes 87% of the overall CH 4 budget Contribution to Landscape CH 4 Budget
Llyn Serw, Migneint Conwy, North Wales Habitat – wet Calluna heath on Blanket Peat – NVC M19 – Calluna, Eriophorum sp., Sphagnum sp. Historical Drainage with ditches – 1920’s & 1930’s running S-SE (mostly re-vegetated) – 1970’s & 1980’s running N-S NT blocked ditches in pilot study in 2008
National Trust peat restoration pilot study, Llyn Serw
CH 4 CO 2 CH 4 CO 2
Transect of trace Gas Measurements A D CB EF A D CB EF Dip well Gas Measurement Transect Code Gas Measurements - between 11am – 3pm
Before: After: Two years after:
Results Summary Infilled ditches contribute a significant percentage to landscape scale methane budget despite occupying a tiny percentage of the landscape Compensating increase in CO 2 sequestration not yet quantified Vegetation in ditch is critically important for CH 4 flux Is this a transient or a long-term effect?
Defra project to assess the impacts of peat restoration on the GHG balance Five year field experiment to evaluate the effects of peat restoration on methane emissions and the overall C and GHG balance (with Leeds and Open Universities, National Trust) Replicated study of 12 ditches, with 2 ditch-blocking treatments, pre- and post treatment measurements (CH 4, CO 2, DOC, discharge, etc)
Many thanks I am expecting to finish my PhD 2011/2012.