Cities : Nexus between anthropogenic and climate processes
Cities : Nexus between anthropogenic and climate processes
19th of February 2019
IPSL - Site Jussieu - Sorbonne Université
Room Henry Darcy (METIS), 3rd floor, Towers 46-56.
Large cities concentrate, through the high density of population, a large part of the emission of pollutants linked to human activities but they also maximise the exposition of populations. But these local sources are not sufficient to explain the balance of pollutants and chemical processes over the cities because the contribution of surrounding agricultural lands and forests also need to be taken into account. Furthermore cities will be regions with the highest impact of climate change by the combination of global warming, the urban heat island effect and obviously the large population density. Our knowledge on the evolution of emissions and changes in the lower atmosphere and their combined impact on air quality and meteorological conditions need to progress in order to allow us to produce forecasting tools relevant for stakeholders in cities. Our new knowledge and the tools developed need to help define policies for the control of anthropogenic emissions and guide urban planning in a changing climate which will mitigate the impacts in cities.
IPSL posses a strong trans-disciplinary expertise on these topics and should be a key actor on the topic of urban air quality. This workshop aims at triggering and strengthening collaborations within the institute and favour the interactions with partners outside of IPSL in order to bring in external expertises.
10:00–10:30 Urban modelling of transports and its impacts on air quality -- O. Perrussel and J. Vigneron (AIRPARIF)
10:30–11:00 Biogenic emissions from natural vegetation -- B. Loubet(INRA)
11:00–11:15 Pause
11:15–12:00 Discussion : Quantify and predict emissions
How to better characterise chemically emissions ?
Predict future evolutions of emissions under the double constraint of regulations and climate change.
impact of depositions
Link with the hydrological cycle : role of rainfall characteristics and runoff.
Dynamics, climate and weather
12:00-12:30 Volume for pollution dispersion: the role of urban boundary layer dynamics -- S. Kotthaus (LMD)
12:30-13:00 Climate change and its impacts on the local weather and air quality -- R. Vautard (LSCE)
13:00-14:00 Lunch
14:00-14:45 Discussion : Respective role of processes at the city and large scale dynamics on the weather over the city.
The scientific challenge of downscaling
Dynamical or statistical downscaling ?
Land/atmosphere interactions over managed environments like the city and its surroundings.
Method for the current and future climate.
Modelling cities at kilometric scales : transport and chemistry
14:45-15:15 ACCROSS : Biogenic activations of tropospheric suburban plumes -- Chris Cantrell (LISA)
15:15-15:45 Multiscale modelling of urban air quality -- I. Coll (LISA)/K. Sartelet (CEREA)/B. Carissimo (EDF)
15:45-16:00Pause
16:00-16:30 Discussion : Spatial scales pertinent for chemical processes over the urban environment.
Which instruments and network for observations (individual instruments, mini-stations, crowd based networks, IPSL stations, field campaigns, operational network) ?
Which modelling tools for physical and chemical processes.
16:30-17:00 IPSL’s strategies for the urban environment.
Current activities at IPSL and their collaborations.
Partnerships to be strengthened or created.
Developments needed for observation and modelling.
Interactions between teams and models to be strengthened.
Interactions with the scientific themes of IPSL.
Posters :
You may submit your posters after the registration process.
