Effect of resolution of input data on modelled N 2 O fluxes at landscape scale. Hans Kros, Wim de Vries, Gert Jan Reinds

Transcription

1 Effect of resolution of input data on modelled N 2 O fluxes at landscape scale Hans Kros, Wim de Vries, Gert Jan Reinds

2 Outline Introduction Modelling N 2 O at landscape scale Comparing dataset with different resolutions Effect of resolution on N 2 O emissions Conclusions

3 Landscape interactions NH 3 DON N 2 O N 2 O N 2 O NH 4 + NO 3 - NO 3 - N 2 O DON N 2 O NO 3 - NH 4 + NO 3 -

4 Effect of object scale Noordelijke Friese Wouden

5 Noordelijke Friese Wouden C4 Landscapes Landscape characteristics: Area: Approx. 500 km 2 Intensive dairy farming Hedgerows Flat, Pumped drainage

6 INTEGRATOR Models and data available European scale data: 1 km x 1 km at NCU level (11 plots, 4518 ha) INITIATOR2 - NL National scale data: 250 m x 250m at STONE plot level (354 plots, 143 ha) INITIATOR2 NFW Regional scale (landscape) data: 250 m x 250 m at parcel level (4756 plots, 9.5 ha)

7 EU soil map CLC2000 Landuse INTEGRATOR Eurostat data: Animal numbers - Croptypes - Yields etc. Model intercomparison - N animal manure - N fertilizer - N deposition - N mineralisation NCU 1 1km 2 11 plots 4518 ha NH 3 emission N 2 O emission NO 3 leaching NL soil map NL Landuse (LGN) NL soil map NL Landuse (LGN) NL data: - Animal numbers - Crop types - Yields etc. Stone plot m plots 143 ha NFW plot m 2 INITIATOR NL 4756 plots 9.5 ha

8 Modelling N2O at landscape scale

9 NL/NFW: INITIATOR2 model

10 Climate change EU: INTEGRATOR model Land cover change Agricultural change E-D matrix N deposition NH 3, NO x EFISCEN (forests) Empirical+meta models (Nature, Peatlands) MITERRA (agriculture) Organic C Organic C YASSO INTEGRATOR ΔC pool CO 2 N 2 O, CH 4, CO 2 N leaching, N budget

11 Overview scaling differences Aspect EU: Europe NL: National NFW: Landscape Aim Quantify effects of EU policies on NH 3, N 2 O and CH 4 emissions and N- en P-surpluses. Quantify effects of Dutch policies on NH 3 emissions and deposition, GHG emissions, N, P leaching Monitoring of effects of management changes in a region Scale NCUs STONE plots NFW plots Animal RAINS CBS CBS numbers Soil data Not included National soil database National soil database N manure input N fertilizer input Manure distribution at NUTS2 level Downscaling FAO data to NUTS 2 level N Deposition European scale modeling EMEP Manure distribution at municipality level Based on national management and statistics National scale modeling OPS Manure distribution at farm level Based on national management and statistics Regional scale modeling OPS

12 Comparing dataset with different resolutions

13 Land Use: European, National, Regional EU landuse (CLC2000) Map/INTEGRATOR clusters NL landuse (LGN3+) Map/INITIATOR2 clusters NFW Landuse (BRP) Map/INITIATOR2 NFW clusters

14 Area (ha) Areas according to different data sources Landscape National European Nature Crops Pastures

15 Soil type: European, National, Regional EU Soil Map/ INTEGRATOR clusters NL Soil Map/ INITIATOR2 clusters NL Soil Map/ INITIATOR2 NFW clusters

16 Area (ha) Areas according to different data sources Landscape National European Sand Loam Clay Peat

17 Wetness class: European, National, Regional EU GT Map/ INTEGRATOR clusters NL GT Map/ INITIATOR2 clusters NL GT Map/INITIATOR2 NFW clusters

18 Area (ha) Areas according to different data sources Landscape National European Dry Moist Wet

19 Effect of resolution on N 2 O emissions

20 Fertilizer use 2007 (kg N ha -1 ) European National Landscape

21 Application animal manure 2007 (kg N ha -1 ) European National Landscape

22 N 2 O emission 2007 (kg N 2 O-N ha -1 ) European National Landscape

23 Effect on N 2 O fluxes in NFW due to difference in resolution Resolution Area N am N fe N 2 O emh N 2 O denis N 2 O emdi N 2 O emgw N 2 O emt (km 2 ) (kton N) (kton N 2 O-N) EU NL NFW N am = animal manure N fe = fertilizer emh = housing emission denis = soil emission emdi = ditch emission emgw = groundwater emission emt = total emission

24 Conclusions Large scale data are biased: Grassland areas: NFW~NL<<EU Peaty soils: NFW~NL>>EU Wet soils: NFW>NL>>EU The higher the resolution, the higher the N 2 O emission; mainly due to soil emission Lower N 2 O emission estimates based on coarse European data are due to an underestimation of peat soil and wet areas This may have consequence for the European estimates

25 Thank you Wageningen UR