title: Role of motor-vehicles and trend of air borne particulate in the Great Tehran area, Iran.
abstract: Tehran, the capital city of Iran, is one of the largest cities in the world. It extends over an area of approximately 2,300 square kilometers and has a population of more than 10 million people. The city is suffering from atmospheric pollution arising from the rapid urbanization during the last 3 to 4 decades. The city will develop towards the west to Karaj, and large volumes of traffic will be going east-west by the year 2015. With more than 2 million vehicles in Tehran, most of which are more than 20 years old, traffic is the major source of air pollution in Tehran. The city of Tehran has a significant air pollution problem and suspended particulate matter (SPM) appears to rank high on the list pollutants. The monthly average of PM-10 in Tehran is high in autumn and low in spring. Maximum average value observed in September is over 370 microg/m(3); the minimum in March (102 microg/m(3)) and early April (65 microg/m(3)). The diurnal variation PM-10 concentration have been studied.
authors.affiliation: Materials and Energy Research Center, Theran, Iran. fhalek@yahoo.com
authors.forename: F
authors.initials: F
authors.lastname: Halek
authors.forename: A
authors.initials: A
authors.lastname: Kavouci
authors.forename: H
authors.initials: H
authors.lastname: Montehaie
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002947:Cities; D004784:Environmental Monitoring; D007492:Iran; D010316:Particle Size; D012621:Seasons; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D001335:Vehicle Emissions