D E S C R I P T I O N O F W O R K - MEGAPOLI - Dmi

MEGAPOLI 212520
performed in WP3, 4 and 5 and 7-2 will be analysed and comparisons conducted with measurements from Paris to
highlight differences in the model features. Criteria (both technical / practical and scientific relating to physical
processes addressed) will be formulated for selecting the modelling systems to be represented in integrated tool. The
evaluation will consider the overall performance as well as the aspects such as off-line versus on-line approaches. The
task will benefit here from approaches developed in other projects such as CLEAR (FUMAPEX, OSCAR and
MERLIN), ACCENT as well as COST 728 and COST ES0602 and with international groups such as USEPA/NOAA.
A range of evaluation approaches will be employed including statistical comparison with measurements, process
orientated and sensitivity analyses.
Task 7.4: Implementation of integrated tools to other megacities (lead: WMO)
The cities will be selected according to emission source mix, intensity of emission rates, meteorological characteristics
(orographic and weather patterns), future growth trends, local impact as well as potential to directly affect Europe. Data
will also be used from other networks and groups including WMO/GURME
(http://www.wmo.ch/web/arep/gaw/urban.html), Global Atmospheric Pollution Forum (http://www.sei.se/gapforum/)
and Clean Air Initiative: Asia (http://www.cleanairnet.org). Tools from task 2 and 3 will be implemented here for
selected megacities, including Moscow (ENVIRO-HIRLAM, DMI), Mexico City (STEM/FARM, ARIANET;
CHIMERE, CNRS), Shanghai (M-SYS, UHam), Delhi (ECHAM5/MESSy, MPIC; WRF-Chem ,UH-CAIR), Bangkok
(WRF-Chem , UH-CAIR), New York (FLEXPART, NILU), Cairo (RegCM3, ICTP; CHIMERE, CNRS). Other cities,
as schematically shown in the City Pyramid will also be investigated, for example through improved representation in
global models (UKCA, MetO; ECHAM5/MESSy, MATCH-MPIC). Simpler approaches (OSCAR, URBIS and
AIRQUIS) will also be employed for city scale assessment studies depending on the detail of input data availability.
The focus of air quality will be the changes that may result in PM and ozone within the cities and on regional to global
scales. To aid other users, procedures including difficulties arising from the lack of input data will be documented,
particularly for developing regions. This work will feed directly into WP8.
Task 7.5: Recommendations on the scientific analysis of megacity impacts on regional and global air quality and
climate (lead: UH-CAIR)
The results of the model runs in Tasks 3 and 4 for the selected megacities along with the outcomes of the other WPs
will be used to examine the main science questions of the project. These relate to the extent of air quality and climate
impacts on regional and global scales caused by megacities and how well megacities are represented in models for
impact assessment across Europe and elsewhere. The mitigation and policy implications will be examined in WP8 and
hence there will be close interaction between the two WPs. Recommendations will be made for a number of areas
including: How megacities affect air quality on regional and global scales? How will the growth of megacities affect
future climate at global and regional scales? What is the impact of large scale dynamic processes on the air pollution
from megacities? What are the key feedback interactions between the air quality-local climate-global climate changes
relevant to megacities? How accurate are the current emission inventories for megacities and how should megacities
(emissions, processing inside megacities, meteorology) be parameterized in regional and global models? What are the
relative impacts of world megacities on Europe and other regions? The regional and global modelling results from this
WP and WPs5-6 will be re-analysed in collaboration with WP8 to address the above strategic questions.
Deliverables
D7.1 Framework for integrating tools (month 18)
D7.2 Evaluation of integrated tools (month 30)
D7.3 Implementation of integrated models for megacities (month 30)
D7.4 Synthesis of results and recommendations on key science questions and use of models according to complexity
(month 36)
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