Nitrogen deposition in the greater Tehran metropolitan area.
An investigation of air pollution in the Tehran metropolitan area between 1992-2000 indicated that there are significant amounts of nitrate ion (NO3-), over 30 kg/ha/year, deposited as wet deposition, compared to 13 kg/ha/year in the Chitgar Parkland near the Tehran metropolitan area. The amount of NO3- in warm seasons is twofold that of cold seasons, and there was a significant difference between cold and warm seasons. Annual wet deposition of ammonia (NH3) was 10 kg/ha/year in the Chitgar Parkland.
Salahi
A
A
Research Institute of Forests and Rangelands, Alborz Research Center, Karaj, Iran. ali.salahi@rifr-ac.org
Geranfar
S
S
Korori
S A
SA
D015258:Acid Rain; D000393:Air Pollutants / Q000032:analysis*; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods; D007492:Iran; D009566:Nitrates / Q000032:analysis*; D012621:Seasons; D013431:Sulfates / Q000032:analysis
D015258:Acid Rain; D000393:Air Pollutants; D009566:Nitrates; D013431:Sulfates