TEMPERATURE-FIELDS AND AIR-POLLUTION BUILDUP OVER THE ATHENS BASIN

TRYFONOPOULOS, DA; BERGELES, GC

dc.contributor.author	TRYFONOPOULOS, DA	en
dc.contributor.author	BERGELES, GC	en
dc.date.accessioned	2014-03-01T01:10:20Z
dc.date.available	2014-03-01T01:10:20Z
dc.date.issued	1994	en
dc.identifier.issn	0266-9838	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11367
dc.subject	AIR POLLUTION	en
dc.subject	COMPLEX TERRAIN	en
dc.subject	2-EQUATION TURBULENCE CLOSURE	en
dc.subject	3-DIMENSIONAL MODEL	en
dc.subject.classification	Computer Science, Software Engineering	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.other	FLOW	en
dc.subject.other	HILL	en
dc.title	TEMPERATURE-FIELDS AND AIR-POLLUTION BUILDUP OVER THE ATHENS BASIN	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0266-9838(94)90024-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0266-9838(94)90024-8	en
heal.language	English	en
heal.publicationDate	1994	en
heal.abstract	The wind and temperature fields, and the associated vehicle-induced atmospheric pollution build-up over the Athens Basin have been simulated using a time-dependent, three-dimensional numerical model. The model utilizes the continuity equation to produce a non-divergent wind field adopting a mass consistent methodology; then the heat conservation equation is solved, while a two-equation (k-epsilon) turbulence model is used for obtaining the turbulent exchange coefficients. Finally the concentration equation is numerically solved in transformed space and the passive contaminants distribution over the Athens complex topography is obtained. The model has been used to predict the temperature distribution and the surface concentrations of pollutants over the Athens area for South wind and a certain traffic scenario during a 24-hour cycle. The obtained results reproduced successfully the diurnal variation of the atmospheric stability conditions; the variation of the resulting surface temperature agreed well with available measurements, while the results for the atmospheric pollution showed that the banning of the car traffic in the city-center is effective only for certain time periods within the day, and that in the early afternoon hours the traffic could be allowed without any harmful effects to the air quality of the city as at this time unstable atmospheric conditions prevail. Also the use of the model revealed that the daily variation of the CO concentration can be mainly attributed to the atmospheric stability changes during the day rather than to traffic volume variations.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	ENVIRONMENTAL SOFTWARE	en
dc.identifier.doi	10.1016/0266-9838(94)90024-8	en
dc.identifier.isi	ISI:A1994PU23800005	en
dc.identifier.volume	9	en
dc.identifier.issue	4	en
dc.identifier.spage	269	en
dc.identifier.epage	283	en