ÉCLAIRE  model inter-comparison of atmospheric nitrogen deposition and concentrations over Europe
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ÉCLAIRE model inter-comparison of atmospheric nitrogen deposition and concentrations over Europe. R.J. Wichink Kruit 1 , D. Simpson 2 , M. Schaap 1 , R. Kranenburg 1 , E. Dammers 1 ,

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R j wichink kruit 1 d simpson 2 m schaap 1 r kranenburg 1 e dammers 1

ÉCLAIRE model inter-comparison of atmospheric nitrogen deposition and concentrations over Europe

R.J. Wichink Kruit1, D. Simpson2, M. Schaap1, R. Kranenburg1, E. Dammers1,

C.A. Geels3, C. Skjoth4, M. Engardt5, A. Graff6, R. Stern7 , B. Bessagnet8, L. Rouil8, J.M. Baldasano9, M. Pay9, D. Hauglustaine10, A. Nyiri2, M.A. Sutton11, S. Reis11,

P. Thunis12 and C. Cuvelier12

1 TNO, Dept. of Climate, Air and Sustainability, P.O. Box 80015, NL-3508TA Utrecht, The Netherlands

2 Norwegian Meteorological Institute, Air Pollution Section Research Department, P.O. Box 43, Blindern, N-0313, Oslo, Norway

3 Aarhus University, Department of Environmental Science-Atmospheric modeling, Frederiksborgvej 399, 4000 Roskilde, Denmark

4 University of Worcester, National Pollen and Aerobiology Research Unit, Henwick Grove, VR2 6AJ, Worcester, United Kingdom

5 SMHI, Norkoping

6 Umweltbundesamt, Postfach 1406, D-06813 Dessau-Roßlau, Germany

7 Freie Universität Berlin, Institut für Meteorologie und Troposphärische Umweltforschung, Carl-Heinrich-Becker Weg 6-10, D-12165 Berlin, Germany

8 INERIS, Institut National de l’Environnement Industriel et des Risques Parc Technologique, ALATA, F-60550 Verneuil-en-Halatte, France

9 Barcelona Supercomputing Center, c/ Jordi Girona 29, E-08034 Barcelona, Spain

10 Laboratoire des Sciences du Climat et de l’environnement, UMR 8212 CEA-CNRS-UVSQ, Gif-sur-Yvette, France

11 CEH, Natural Environmental Research Council, Bush Estate, Pinicuik, Midlothian, EH26 0QB

12 European Commission, DG Joint Research Centre, Institute for Environment and Sustainability, I-21020 Ispra (Va), Italy


Motivation
Motivation deposition and concentrations over Europe

It is difficult to say anything about uncertainties in model calculations of Nr-deposition as there are no observations of total Nr deposition available yet.

This study aims to:

  • deliver an ensemble map of the total Nr-deposition over Europe based on 7 regional European CTMs, and to

  • estimate the inter-model variation in the total Nr-deposition over Europe

  • validate the models by comparing modelled wet depositions and concentrations with observations from the EMEP wet deposition network and NitroEurope IP


Model settings

Modelling the European Nitrogen budget deposition and concentrations over Europe

Model settings

Models: EMEP, LOTOS-EUROS, DEHM, MATCH, CMAQ, CHIMERE, RCGC,

INCA (global)

Emissions:provided by INERIS at

0.5° x 0.25° Longitude/Latitude

Note: INCA used own emissions!

Resolution: 0.5° x 0.25° (~28x28 km2)

DEHM: hemispheric (~ 50x50 km2)

INCA (global): 3.75° x 1.875° (~210x210 km2)

Other Input:not prescribed.

Output domain:


Individual model results

Modelling the European Nitrogen budget deposition and concentrations over Europe

Individual model results

dry NHx

wet NHx

dry NOy

wet NOy

CMAQ

INCA

RCGC

DEHM

EMEP

CHIMERE

MATCH

LOTOS-EUROS


Ensemble of 7 regional ctms total nr

Modelling the European Nitrogen budget deposition and concentrations over Europe

Ensemble of 7 regional CTMs:Total Nr


Contribution of nhx to total nr

Modelling the European Nitrogen budget deposition and concentrations over Europe

Contribution of NHx to total Nr


10 day running mean of model domain

Modelling the European Nitrogen budget deposition and concentrations over Europe

10-day running mean of model domain

Total Nr

Dry Nr ~ 40%

Wet Nr ~ 60%


Contribution of dry nr to total nr

Modelling the European Nitrogen budget deposition and concentrations over Europe

Contribution of dry Nr to total Nr


10 day running mean of model domain1

Modelling the European Nitrogen budget deposition and concentrations over Europe

10-day running mean of model domain

Dry NHx ~ 45%

Dry NOy ~ 35%

Wet NHx ~ 55%

Wet Noy ~ 65%


Conclusions from model inter comparison

Development of GHG projection guidelines deposition and concentrations over Europe

Conclusions from model inter-comparison

  • This study showed that the total Nr-deposition (NHx +NOy) in the model domain were rather similar in all models

  • The variation in model results is largest for the dry deposition of NHx

  • Larger dry deposition is compensated by smaller wet deposition

  • The average variation in the modeled Nr-deposition was about

    • 30-50% over land and

    • 50-100% over water

  • NHx vs. NOy deposition is approximately 50% vs. 50%, but large regional differences!

  • Dry versus wet deposition contributions are approximately

    • 45% vs. 55% for NHx and

    • 35% vs. 65% for NOy and

    • 40% vs. 60% for total Nr (but large regional differences again!)


Comparison with emep wet deposition and nitroeurope ip observation

Modelling the European Nitrogen budget deposition and concentrations over Europe

Comparison with EMEP wet deposition and NitroEurope IP observation


Wet nhx mg m 2
Wet deposition and concentrations over EuropeNHx[mg/m2]


Wet noy mg m 2
Wet deposition and concentrations over EuropeNOy[mg/m2]


R j wichink kruit 1 d simpson 2 m schaap 1 r kranenburg 1 e dammers 1

Modelling the European Nitrogen budget deposition and concentrations over Europe

LOTOS-EUROS

NH3

INCA

CMAQ

RCGC

CHIMERE

DEHM

MATCH

EMEP

ENSEMBLE


R j wichink kruit 1 d simpson 2 m schaap 1 r kranenburg 1 e dammers 1

Modelling the European Nitrogen budget deposition and concentrations over Europe

NH3


R j wichink kruit 1 d simpson 2 m schaap 1 r kranenburg 1 e dammers 1

Modelling the European Nitrogen budget deposition and concentrations over Europe

Conclusions from comparison with observations

  • Ensemble results of the seven regional CTM models are generally better than the individual model results

  • Modelled wet deposition of NOy correlates much better with observed wet deposition than NHx.

  • Regional CTMs are well able to estimate ‘background’ NH3concentrations

  • Data from NitroEurope IP is very useful for the ECLAIRE model evaluation!

  • Further analysis of the model-measurement comparison and reasons for inter-model differences is a priority for the next phase in ECLAIRE.


R j wichink kruit 1 d simpson 2 m schaap 1 r kranenburg 1 e dammers 1

Modelling the European Nitrogen budget deposition and concentrations over Europe

Thank you!


Hno 3

Modelling the European Nitrogen budget deposition and concentrations over Europe

HNO3