Real time monitoring and modelling of air quality in Haifa, Israel

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NILU has established an integrated real time monitoring and modelling system for the Haifa metropolitan area. The project, performed for the Haifa District Municipal Association for the Environment (HDMAE), includes the development and operation in real time of a deterministic air quality dispersion model for the Haifa area. The results of the model calculations are transferred to the client by an Internet solution.

NILU, in conjunction with the Haifa District Municipal Association for the Environment, has developed a real time now cast system for the township of Haifa.

The aim of this system is two fold; to present up to date and publicly available air quality data in the form of maps for the township, and to provide the Association a tool for AQ management that can be used to optimize the existing monitoring network and to improve control strategies.

The now-cast system uses hourly updates of meteorology, air quality data from 14 measurement stations as well as SO2 emission data from major stacks as input data.

Real time monitoring and modelling of air quality in Haifa, Israel
These are fed into the AirQUIS air quality management system where they are used to initialise model runs for a number of pollutants and to produce air quality maps and exposure calculations for the population of the township at 500 m resolution. Post processing assimilation of observed air quality is used to improve concentration fields.

Maps and measurements are automatically updated on a publicly accessible website and are available within one hour of the last observation. The now-cast system has been running since November 2003, as part of an assessment period, but the web site has only recently been opened to the public, see www.aironline.info/haifa.

Results from the nowcasts and other assessment show that traffic related pollutants, as well as industrial SO2 emissions, are not large contributors to poor air quality in Haifa. The most important sources of poor air quality are ozone and dust, which are not generated locally but are transported into the region.

Real time monitoring and modelling of air quality in Haifa, Israel
Real time monitoring and modelling of air quality in Haifa, Israel

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