investigation of total ozone seasonal distribution over iran area for 2007-2008

investigation of surface ozone over tehran for 2008-2011

near surface ozone in urban areas can be potentially hazardous for the city dwellers. as a secondary pollutant it can also be an indicator for other air pollutants as nitrogen oxides, nox and phenol acetate nitrate (pan). in this paper time and spatial variations of near surface ozone and the effective meteorological parameters influencing it concentrations, have been investigated for tehran fo...

Seasonal persistence of midlatitude total ozone anomalies

[1] Temporal autocorrelations of monthly mean total ozone anomalies over the 35–60 S and 35–60 N latitude bands reveal that anomalies established in the wintertime midlatitude ozone buildup persist (with photochemical decay) until the end of the following autumn, and then are rapidly erased once the next winter’s buildup begins. The photochemical decay rate is found to be identical between the ...

Tick Infestation Rate of Sheep and Their Distribution in Abdanan County, Ilam Province, Iran, 2007–2008

BACKGROUND Ticks are hematophagous arthropod belonging to the Class of Arachnids. Ticks are also one of the major vectors of pathogens to animal and human. This study was conducted to determine tick infestation rate of sheep in Abdanan during 2007-2008. METHODS Sampling was performed seasonally in 19 villages during spring 2007 until winter 2008. A total of 1095 sheep were selected and tested...

Total ozone trend over Europe: 1950--2004

study of atmospheric total ozone variations due to winter synoptic scale disturbances over iran

ozone is an important chemical constituent of the atmosphere, and stratosphere it protects the earth surface from harmful uv radiations, such that it is known as “good ozone” while, in the lower troposphere it is a highly oxidizing pollutant and known as “bad ozone”. it is also a greenhoure gas that can affect the climate. hence, the study of spatial and temporal variations of ozone is importan...

Seasonal changes in surface ozone over South Korea

Recently, the surface ozone concentration in the Korean peninsula has been increasing more rapidly than in the past, and seasonal changes are appearing such as increases in the number of ozone alerts in springtime. We examined changes in the timing of annual maximum South Korean O3 levels by fitting a sine function to data from 54 air-quality monitoring sites over a 10-year period (2005-2014). ...