Abstract
A 3-D chemical transport model (OSLO CTM2) is used to investigate the influences of the increasing anthropogenic emission in India. The model is capable of reproducing the observational results of the INDOEX experiment and the measurements in summer over India well. The model results show that when Nox and CO emissions in India are doubled, ozone concentration increases, and global average OH decreases a little. Under the effects of the Indian summer monsoon, Nox and CO in India are efficiently transported into the middle and upper troposphere by the upward current and the convective activities so that the Nox, CO, and ozone in the middle and upper troposphere significantly increase with the increasing Nox and CO emissions. These increases extensively influence a part of Asia, Africa, and Europe, and persist from June to September.
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