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Changes in tropospheric ozone between 2000 and 2100 modeled in a chemistry‐climate model
Author(s) -
Zeng Guang,
Pyle John A.
Publication year - 2003
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 - 10.1029/2002gl016708
Subject(s) - troposphere , stratosphere , atmospheric sciences , environmental science , extratropical cyclone , tropospheric ozone , climatology , ozone , climate model , climate change , atmospheric chemistry , ozone layer , meteorology , geology , physics , oceanography
We present results using a coupled chemistry/climate model to study changes in tropospheric ozone between 2000 and 2100. We assess changes first due to the increased emissions of NO x and VOCs (using the IPCC SRES scenario A2) and then due to both emission changes and the anticipated climate change with doubled CO 2 . In 2100, with the scenarios used, there is a substantial calculated increase in tropospheric O 3 , but in contrast to earlier studies, the increase is larger for doubled CO 2 . The increases are most pronounced in the extratropical middle and upper troposphere; changes in circulation and a chemically induced increase in lower stratospheric O 3 , mainly due to reduced temperatures there, both enhance stratosphere/troposphere exchange. These changes in the lower stratosphere are crucial to our results.