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SEERAD / NAW Project with. Developing a model of methane (and other GHG) emissions from highly organic soils Jo Smith & Helen Flynn School of Biological Sciences University of Aberdeen. What will happen to SOC stocks in 21st Century? Grassland, A1FI. Factors not included in ROTH-C or SUNDIAL.
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SEERAD / NAW Project with Developing a model of methane (and other GHG) emissions from highly organic soilsJo Smith & Helen FlynnSchool of Biological SciencesUniversity of Aberdeen
What will happen to SOC stocks in 21st Century? Grassland, A1FI
Factors not included in ROTH-C or SUNDIAL • Effects of soil pH • Methane emissions • Losses as dissolved organic carbon ROTH-C (Jenkinson et al, 1977); SUNDIAL (Bradbury et al, 1993; Smith et al, 1996)
= use of model outputs = flow of data Distribution of organic soils Best-practices guidelines on effects of conversion to forestry Effects of land-use and climate change on GHG emissions from organic soils Best-practice guidelines on the agricultural use of organic soils Estimates of changes in C and N balance of organic soils from Countryside surveys of Scotland and Wales Effects of land use and climate change on release of dissolved organic matter from organic soils C loss from accelerated erosion of organic soils Model to simulate C and N cycling in organic soils
Some models of methane emissions Wetland-DNDC Zhang et al, 2002 Arah & Stephen model Arah & Stephen, 1998 Linked ForHyM2 Clair et al, 2002 TEM and methane Zhuang et al, 2003; Cao et al, 1998 Kettunen model Kettunen, 2002 Ecosystem source model Christensen et al, 1996
EXTERNAL • Dynamic model (eg. BIOTA) • Static model (eg. MIAMI) • Satellite estimates INPUTS NPP LU Type CO2 CH4 CH4 CO2 RPM DPM Methane Oxidation Meth. Oxid. IOM BIO HUM Decomposition • EXTERNAL • Dynamic hydrology • model (eg. SWIM) • HOST classes • Measurements Texture Module Water Module INPUTS Soil Parameters INPUTS Max.Water level Rain,PET Moisture Texture Decomposition Drivers Oxygen Module Oxygen Temperature Temperature Module INPUTS Air Temp DOC pH pH Module Carbon Component of Organic Soils Model Soil level Water level
EXTERNAL • Dynamic model (eg. BIOTA) • Static model (eg. MIAMI) • Satellite estimates Nitrogen Component of Organic Soils Model INPUTS NPP, LU Type NH3 N2O & N2 Plant N DPM RPM Soil level NH4+ IOM BIO HUM Decomposition • EXTERNAL • Dynamic hydrology • model (eg. SWIM) • HOST classes • Measurements NO3- Water level Moisture Texture Texture Module Water Module INPUTS Max.Water level Rain,PET Decomposition Drivers INPUTS Soil Parameters Oxygen Temperature Oxygen Module Temperature Module INPUTS Air Temp Acidity Leached N Acidity Module
What will happen to SOC stocks in 21st Century? Grassland, A1FI
Pete Smith1, Jo Smith1, Helen Flynn1, Ken Killham1, Ignacio Rangel1, Ronnie Milne2, Ute Skiba2, David Fowler2, Mike Billett2, Steve Chapman3, Willie Towers3, John Bell3, Ann Malcolm3, David Lumsdon3, Bente Foereid3, Brian Reynolds4, Chris Evans4, Zoë Frogbrook4, Ian Bradley5, Marianne McHugh5, Pete Falloon6 1 School of Biological Sciences, University of Aberdeen 2 Centre for Ecology and Hydrology (Edinburgh) 3 Macaulay Institute 4 Centre for Ecology and Hydrology (Bangor) 5 National Soils Resources Institute, University of Cranfield 6 Rothamsted Research
