Short Summary

Pros and cons

Bottom-up inventory Use of satellites

Pros and cons

Bottom-up inventory

• High resolution database in some regions

• All gases are available in inventory

Use of satellites

• Development needed

• Different technique for groups of species

Pros and cons

Bottom-up inventory

• High resolution database in some regions

• All gases are available in inventory

• Time consuming to update (about 2 years)

Use of satellites

• Development needed

• Different technique for groups of species

• Monitoring of emission changes, trends and new spots

Pros and cons

Bottom-up inventory• High resolution database in

some regions• All gases are available in

inventory• Time consuming to update

(about 2 years)• Politically accepted

technique• Depends on good-will of

national authorities

Use of satellites• Development needed

• Different technique for groups of species

• Monitoring of emission changes, trends and new spots

• First step to monitoring of emission protocols

• Fair comparison between nations

Need for GlobEmissions

• Combining of both approaches is needed• Adding satellite information or satellite-derived

emissions for :– Monitoring aspect, – Independent verification– Identifying new hotspots– Identify long-range transport– Distinction anthropogenic / natural emissions– Feedback on new policies for emission regulations

Requirements

• Species: NOx, SO2, PM, NH3, NMVOCs, O3, CH4, marine, biogenic

• Frequency: Seasonal

• Spatial resolution: in range of 1x1 km to 50x50 km

• Accuracy: at least better than a factor 2 on a global scale

• Long-term data flow

Which emissions can be derived ?

Proven (in scientific studies):

• NOx, CH4, HCHO, CO

Probably:

• PM/Aerosol type, SO2, NH3 ?

Not yet:

• O3, CO2

Indirectly Derived:

• NMVOCs (via HCHO and CHOCHO)

Users

• Atmospheric scientists: chemical-transport models

• Compagnies involved in energy or steel production: emission control

• Policy makers: feedback on policy

• Environmental agencies: monitoring/reporting

• Note: The type of users will be largely determined by the level of maturity of the service.