= Evaluation of ORCHIDEE for N coumpounds emissions =

Working group

Mohamed Saad, Nicolas Vuichard, Juliette Lathiere, Didier Hauglustaine

Planned work

1-Perform a set of simulations with the ORCHIDEE model to quantify the fluxes of nitrogen compounds (NH3,NOx,N2O) emitted by the soil.

2-Evaluate simulated emissions at national, continental and global scales by comparing them to emissions by other methods such as inventories (eg: EDGAR).

3-Develop the coupling between ORCHIDEE and INCA models in terms of downward (deposition)and upward(emissions) N fluxes.

Team meeting: 06/03/2019

Define the work steps:

• Read some bibliographical references related to the subject of work.
• Start by seeing outputs of a simulation performed by the ORCHIDEE model as part of NMIP (Tian et al., 2018a, b).
  • look at the variable NH3_EMISSION which gives the emissions per m2 of each type of vegetation. It is an information to combine with the file VEGET_MAX which gives us the fraction of mesh occupied by each type of vegetation.
• See the outputs of the NH3 simulations made by INCA to compare them with those of ORCHIDEE.

Team meeting: 13/03/2019

Evaluate the outputs of the NH3 (monthly, seasonal(averaged, maximum, minimum)) simulations of ORCHIDEE (2016) and INCA.

January	February	March
April	May	June
July	August	September
October	November	December

Monthly averaged emissions of NH3 simulated by ORCHIDEE model for 2016.

Winter	Spring
Summer	Autumn

Seasonal Averaged emissions of NH3 simulated by ORCHIDEE model of 2016.

Winter

Summer

Autumn

Maximum emissions of NH3 simulated by ORCHIDEE model for 2016.

Winter

Spring

Summer

Automn

Minimum emissions of NH3 simulated by ORCHIDEE model for 2016.

January	February	March
April	May	June
July	August	September
October	November	December

Monthly averaged emissions of NH3 of INCA

Spring

Summer

Autumn

Seasonal averaged emissions of NH3 simulated by INCA.

Spring

Summer

Autumn

Maximum emissions of NH3 simulated by INCA.

Spring

Summer

Autumn

Minimum emissions of NH3 simulated by INCA.

What is the temporal variability of the emissions of NH3 mainly for the months of May and September?

Recommendations

• include the global balances of the emissions of NH3 for ORCHIDEE and INCA for the period of 2000-2014.

Team meeting: 20/03/2019

Global balances of the emissions of NH3 for ORCHIDEE (black) and INCA (red) for the period of 2000-2014.

What is the origin of this difference between the global balances of the emissions of NH3.

Recommendations

• Focus on NH3 emissions from the agricultural sector for INCA.
• See references and inventories.
• Compare the emissions of NH3 for INCA with those of the EDGAR inventory.

Team meeting: 27/03/2019

2000	2001	2002
2003	2004	2005
2006	2007	2008
2009	2010	2011
2012

Annual emissions of NH3 for INCA from the agricultural sector from 2000 to 2012.

2000	2001	2002
2003	2004	2005
2006	2007	2008
2009	2010	2011
2012

Annual emissions of NH3 for EDGAR inventory from 2000 to 2012.

What are the different sources that contribute to emissions from the agricultural sector for EDGAR inventory.

Recommendations

• Focus on NH3 emissions from the agricultural sector for EDGAR inventory.

Team meeting: 03/04/2019

The important sources for which the EDGAR inventory accounts for the agricultural sector are:

• Agricultural Soil: 4C + 4D
• Manure Management: 4B
• Agricultural Waste BURNING: 4F

2000	2001	2002
2003	2004	2005
2006	2007	2008
2009	2010	2011
2012

Annual emissions of NH3 from agricultural soil for EDGAR inventory from 2000 to 2012.

2000	2001	[[Image(EMI_NH3_MM_2002.2.png)] 2002
2003	2004	2005
2006	2007	2008
2009	2010	2011
2012

Annual emissions of NH3 from manure management for EDGAR inventory from 2000 to 2012.

what is the monthly variability of nh3 emissions from agricultural soil and manure management for EDGAR inventory.

The monthly data available for agricultural soil and manure management are for the year 2010.

January	February	March
April	May	June
July	August	September
October	November	December

Monthly change in NH3 emissions from agricultural soil for the EDGAR inventory for 2010.

January	February	March
April	May	June
July	August	September
October	November	December

Monthly change in NH3 emissions from manure management for the EDGAR inventory for 2010.

Recommendations

• Monthly reports of NH3 emissions for the various sources involved in the agriculture sector of the EDGAR inventory for the year 2010.

Team meeting: 10/04/2019

90S_90N	90S_30S
30S_30N	30N_90N

Monthly reports of NH3 emissions for the various sources involved in the agriculture sector of the EDGAR inventory for the year 2010.