GEMS AEROSOL WP2 refinement of aerosol

emission sources

M.SofievAir Quality Research

Finnish Meteorological Institute

Tasks of WP2 (emission)

• Task 2.1 Update and assimilation of the anthropogenic emission inventories of aerosol and its precursors.

• Task 2.2. Assimilation of information on the wild fires

• Task 2.3. Quantification of the wind-blown dust emission from desert areas

• Task 2.4. Quantification of the wind-blown sea salt emission

• Task 2.5. Sources of stratospheric aerosols

Information flows in AER WP2

AER_2.1data bases

AER_3Data

assimilation

GRG

RAQ

ESAEUMETSAT

NASA

Methodology,data

Globalaerosol

monitoringsystem

Emission data

GEIA / ACCENT / RETRO /

EMEP

Fire counts

Emission data

AER_2.2wild fires

AER_2.3dust emis.

AER_2.4sea salt emis

AER_2.5stratosph.

SO2 data

Data, modules

WP2 Gant chart

Task 2.1: anthropogenic emission

• An overview of the existing emission inventories (FMI, HALO paper)– 10 official and scientific inventories– nearly all needed species are covered– strongly varying coverage and resolution, overlaps and

differences between the methodologies and reference periods

– necessity to have a mapping of the databases to the best-represented regions and species

• During the kick-off the emission task force is going to meet and agree upon a harmonised approach

Task 2.2: wild fires

• Two sources of information: fire counts (suitable for NRT applications) and burnt areas (past analysis)

• An inventory of fire-count products has been made (HALO paper)– there are several near-real-time products available– fire counts tend to strongly under-estimate the fire area,

which might require recalibration of more sophisticated improvements

• Modification for transforming GWEM (emission composition and total mass) to a NRT instrument and its linking with BUOYANT model (plume elevation) are being considered

Task 2.3 wind-blown dust

• Basic schemes: Balkanski et al., Tegen et al.

• ORCHIDEE vegetation dynamic model for dynamic land characteristics

Task 2.4 sea-salt emission

• Consideration of wide size spectrum of particles is needed

• Several schemes are available (Monahan, Smith&Harrison, Andreas), as well as their intercomparison

Task 2.4 sea-salt emission (2)

Task 2.5stratospheric sulphates

• Main stratospheric source is: volcanic SO2 from eruptions

• Other sources are primarily tropospheric and thus will be treated via troposphere-stratosphere exchange

• Main method for SO2 from volcanoes: data assimilation (after 18 month of the project)

First-step tasks

• Discuss and implement anthropogenic emission database – in a harmonized manner with other sub-projects

• Develop a scheme of wild fires accounting from hot-spot satellite products and start testing and calibration of the model

• Start implementation of existing schemes for wind-blown dust and sea-salt emissions