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Threshold exceedances and cumulative ozone exposure indices at tropical suburban site
Author(s) -
Beig G.,
Ghude Sachin D.,
Polade S. D.,
Tyagi B.
Publication year - 2008
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2007gl031434
Subject(s) - ozone , environmental science , air quality index , air pollution , human health , atmospheric sciences , pollution , range (aeronautics) , meteorology , climatology , environmental health , geography , ecology , biology , geology , medicine , materials science , composite material
This study provides the first analysis of threshold exceedances and cumulative ozone exposure indices from Pune, a tropical suburban site in India. We used the directives on ozone pollution in ambient air provided by the United Nations Economic Commission for Europe, and by the World Health Organization to assess the air quality from in situ measurements of surface ozone (during the years 2003–2006). We find that the exposure‐plant response index (Accumulated exposure Over a Threshold of 40 ppb (AOT40)) and target values for protection of human health (8‐h > 60 ppb) are regularly surpassed. This is a concern for agricultural and human health. Air‐mass classification based on back‐air trajectories shows that the excess of AOT40 values is quite plausibly due to long‐range transport of background ozone and its precursors to the measurement site.