Update on Soil C&N Module work - Joint UK Land …– QESM Methane project (with Doug Clark, CEH)...
Transcript of Update on Soil C&N Module work - Joint UK Land …– QESM Methane project (with Doug Clark, CEH)...
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Update on Soil C&N Module work
Pete Smith
Royal Society-Wolfson Professor of Soils & Global Change, FIBiol, FRSE
Institute of Biological & Environmental Sciences,
School of Biological Sciences,
University of Aberdeen,
Scotland, UK
E-mail: [email protected]
JULES Meeting – Exeter, June 2009
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Ongoing projects developing the
JULES soil C & N module
• Using JULES-Soil C&N coupled code– Defra [CEOSA0804] soil threats project (with David Cooper, CEH)
– CEH CHESS project (PhD with Eleanor Blyth & Bridget Emmett, CEH)
– JULES for croplands (with Chris Jones & Spencer Liddicoat, Hadley Centre)
– QESM Methane project (with Doug Clark, CEH)
– CEH Bio-energy projects (with Jon Finch, CEH)
– IMOGEN runs (with Chris Huntingford, CEH)
• Using stand-alone Soil C&N module– Scottish Government, RERAD NSIS2 project
– Welsh Assembly Government, ECOSSE-2 project
– Defra [CEOSA0804] soil threats project (see also above)
– Defra [SP0567] soil organic carbon project
– NitroEurope / CCTAME / Carbo-Extreme (croplands only)
– NNFCC project on bio-energy crops in the UK
– QUEST Soils upland / peatland model comparison
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(b)Simulated changes in
soil carbon
(kt C 20km-2 (10 years)-1)
(a)
Running with inventory data for
Scotland
J.U Smith et al., 2009
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…and for England & Wales
Hillier et al., 2009
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Tested against
catchment scale
data in Wales
DOC
Nayak et al., 2009
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Comparison with National GHG
Inventory
-2000
-1500
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-500
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Change in
soil
C a
cro
ss S
cotla
nd (
kt C
yr-1)
2000-2009 2010-2019
to arable to grassland to forestry to semi-natural
Gain in soil C
Loss of soil C
J.U Smith et al., 2008
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Simulated soil carbon (0-95cm) at NSIS site with land use change
semi-natural to forestry
Extrapolation of results over the 160 years using long term average weather data.
-Minimal disturbance, net increase in soil C after 15 years.
NOTE
260000
280000
300000
320000
340000
360000
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400000
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160
Years
To
tal s
oil
ca
rbon
to
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g C
ha-1
)
Sim. semi-nat. -> for. - Min. disturbance Sim. semi-nat. in steady state Sim. for. in steady stateSim. semi-nat. -> for. - High disturbance Meas. semi-nat. in steady-state Meas. for. in steady-stateSim. semi-nat. -> for. - Fitted disturbance
15 yrs
140 yrs80 yrs
-If soil is disturbed, net increase in soil C after 140 years.
-This emphasises the importance of practices to minimise soil disturbance
J.U Smith et al., 2009
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Assessing the impacts of energy
crops
Gottschalk et al., 2009