News
TRACECA ETS Seminar
ENVISA organised the Aviation ETS and Climate Change Policy Seminar for TRACECA project on December 14-15 in Istanbul. Read more...
Clean Sky SGO ITD
ENVISA is on track to take part to joint research projects for the Clean Sky SGO (Systems for Green Operations) ITD starting early 2010. More details soon...
EUROCONTROL's INVENTAIR
ENVISA was mandated by EUROCONTROL to create a website dedicated to global aircraft emissions. The site will allow registered users to download and visualise worldwide emission grids based on WISDOM flight movement database.
Environmental Costs and Benefits of Ground Delay
Dates: 2005 - 2006
Air Traffic Flow and Capacity Management (ATFCM) activities, coordinated by the Central Flow Management Unit (CFMU), hold aircraft on the ground, preventing airborne delays during which fuel is burnt and emissions are produced. On the other hand, during hold-on-ground delays, extended use of aircraft engines in idle mode or Auxiliary Power Unit impact local air quality.
ENVISA assessed the environmental impact of the ATFCM motivated “hold-on-ground” delays in terms of environmental costs and benefits compared to their possible airborne substitutes (holding stacks or traffic rerouting). The study examined two scenarios:
- A ground delay scheme (current situation) taking into account three emission sources: aircraft engines, auxiliary power units and ground power units
- A hypothetical airborne delay scheme with either holding stacks before arrival or rerouting to avoid congested sectors.