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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. - PowerPoint PPT Presentation
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Developing a model of methane (and other GHG)
emissions from highly organic soils
Jo Smith & Helen FlynnSchool of Biological Sciences
University of Aberdeen
SEERAD / NAW Project with
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)
Model to simulate C and N
cycling in organic soils
Estimates of changes in C and N balance of organic
soils from Countryside surveys
of Scotland and Wales
C loss fromaccelerated erosion of
organic soils
Best-practice guidelines on
the agricultural use of organic
soils
Best-practices guidelines on
effects of conversion to
forestry
= use of model outputs= flow of dataDistribution of
organic soils
Effects of land-use and climate change on GHG emissions from
organic soils
Effects of land use and climate
change on release of dissolved
organic matter from
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
Waterlevel
MoistureTexture
Oxy
gen
Tem
pera
ture
pH
DecompositionDrivers
WaterModule
Tem
pera
ture
Module
pH Module
TextureModule
Oxy
gen
Mod
ule
Soillevel
INPUTSMax.Water
levelRain,PET
INPUTSAir Temp
INPUTSSoil
Parameters
Carbon Componentof Organic Soils Model
BIO HUM IOM
CH4 CH4
MethaneOxidation
Meth.Oxid.
EXTERNAL• Dynamic hydrology model (eg. SWIM)• HOST classes• Measurements
Decomposition
CO2 CO2
INPUTSNPP
LU Type
EXTERNAL• Dynamic model (eg. BIOTA)• Static model (eg. MIAMI)• Satellite estimates
DPMRPM
DOC
Waterlevel
MoistureTexture
Oxy
gen
Tem
pera
ture
Acidity
DecompositionDriversTe
mpera
ture
Module
Acidity Module
TextureModule
Oxy
gen
Mod
ule
Soillevel
INPUTSMax.Water
levelRain,PET
INPUTSNPP, LU Type
EXTERNAL• Dynamic model (eg. BIOTA)• Static model (eg. MIAMI)• Satellite estimates
INPUTSAir Temp
INPUTSSoil
Parameters
HUM
Nitrogen Componentof Organic Soils Model
DecompositionIOM
N2O
& N2
EXTERNAL• Dynamic hydrology model (eg. SWIM)• HOST classes• Measurements
Leached N
BIO
RPM DPM
WaterModule
NO3-
NH3
NH4+
Plant N
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 Aberdeen2 Centre for Ecology and Hydrology (Edinburgh)3 Macaulay Institute4 Centre for Ecology and Hydrology (Bangor)5 National Soils Resources Institute, University of Cranfield6 Rothamsted Research