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GEOPHYSICAL RESEARCH LETTERS
Volume 30, Issue 24, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2003GL018526
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We assess future climate change impacts on stratosphere-troposphere exchange (STE) and their influences on tropospheric O-3, using a chemistry coupled climate model. Tropospheric O-3 distribution and budget were predicted decadally for 1990 to 2100 with emission changes (for O-3 precursors) and climate change specified by the IPCC SRES-A2 scenario. Our simulations show increases in stratospheric O-3 transport to the troposphere as a result of enhancement in the tropospheric and stratospheric circulation with climate change in the model. With emission changes only, net stratospheric O-3 input to the troposphere was simulated to decrease by similar to20% during 1990-2100, but to increase by similar to80% with including climate change also. Simulated increases in net cross-tropopause O-3 transport are most significant particularly after 2050.
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