World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Impact of Climate Change on Tropospheric Ozone and Its Global Budgets : Volume 7, Issue 4 (27/07/2007)

By Zeng, G.

Click here to view

Book Id: WPLBN0003993253
Format Type: PDF Article :
File Size: Pages 49
Reproduction Date: 2015

Title: Impact of Climate Change on Tropospheric Ozone and Its Global Budgets : Volume 7, Issue 4 (27/07/2007)  
Author: Zeng, G.
Volume: Vol. 7, Issue 4
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: copernicus


APA MLA Chicago

Young, P. J., Pyle, J. A., & Zeng, G. (2007). Impact of Climate Change on Tropospheric Ozone and Its Global Budgets : Volume 7, Issue 4 (27/07/2007). Retrieved from

Description: National Centre for Atmospheric Science, Department of Chemistry, University of Cambridge, Cambridge, UK. We present the chemistry-climate model UM_CAM in which a relatively detailed tropospheric chemical module has been incorporated into the UK Met Office's Unified Model version 4.5. We obtain good agreements between the modelled ozone/nitrogen species and a range of observations including surface ozone measurements, ozone sonde data, and some aircraft campaigns.

Four 2100 calculations assess model responses to projected changes of anthropogenic emissions (SRES A2), climate change (due to doubling CO2), and idealised climate change associated changes in biogenic emissions (i.e. 50% increase of isoprene emission and doubling emissions of soil-NOx). The global tropospheric ozone burden increases significantly for all the 2100 A2 simulations, with the largest response caused by the increase of anthropogenic emissions. Climate change has diverse impacts on O3 and its budgets through changes in circulation and meteorological variables. Increased water vapour causes a substantial ozone reduction especially in the tropical lower troposphere (>10 ppbv reduction over the tropical ocean). On the other hand, an enhanced stratosphere-troposphere exchange of ozone, which increases by 80% due to doubling CO2, contributes to ozone increases in the extratropical free troposphere which subsequently propagate to the surface. Projected higher temperatures favour ozone chemical production and PAN decomposition which lead to high surface ozone levels in certain regions. Enhanced convection transports ozone precursors more rapidly out of the boundary layer resulting in an increase of ozone production in the free troposphere. Lightning-produced NOx increases by about 22% in the doubled CO2 climate and contributes to ozone production.

The response to the increase of isoprene emissions shows that the change of ozone is largely determined by background NOx levels: high NOx environment increases ozone production; isoprene emitting regions with low NOx levels see local ozone decreases, and increase of ozone levels in the remote region due to the influence of PAN chemistry. The calculated ozone changes in response to a 50% increase of isoprene emissions are in the range of between –8 ppbv to 6 ppbv. Doubling soil-NOx emissions will increase tropospheric ozone considerably, with up to 5 ppbv in source regions.

Impact of climate change on tropospheric ozone and its global budgets

Wiedinmyer, C., Tie, X. X., Guenther, A., Neilson, R., and Granier, C.: Future changes in biogenic isoprene emissions: How might they affect regional and global atmospheric chemistry?, Earth Interactions, 10(3), 1–19, 2006.; Wu, S. L., Mickley, L. J., Jacob, D. J., Logan, J. A., Yantosca, R. M., and Rind, D.: Why are there large differences between models in global budgets of tropospheric ozone?, J. Geophys. Res., 112, D05302, doi:10.1029/2006JD007801, 2007.; Yienger, J. J. and Levy, H.: Empirical model of global soil-biogenic NO$_\rm x$ emissions, J. Geophys. Res., 100, 11 447–11 464, 1995.; Young, P. J.: The influence of biogenic isoprene emissions on atmospheric chemistry: A model study for present and future atmospheres, Ph.D. thesis, University of Cambridge, Cambridge, U.K., 2007.; Zeng, G. and Pyle, J. A.: Changes in tropospheric ozone between 2000 and 2100 modeled in a chemistry-climate model, Geophys. Res. Lett., 30, 1392, doi:10.1029/2002GL016708, 2003.; Zeng, G. and Pyle, J. A.: Influence of El Ni\~no southern oscillation on stratosphere/troposphere exchange and the global tropospheric ozone budget, Geophys, Res. Lett., 32, L01814, doi:10.1029/2004GL021353, 2005.; Arneth, A., Niinemets, U., Pressley, S., et al.: Process-based estimates of terrestrial ecosystem isoprene emissions, Atmos. Chem. Phys., 7, 31–53, 2007.; Atkinson,~R., Baulch,~D L., Cox,~R A., Hampson,~R F., Kerr,~J A., Rossi,~M J., and Troe,~J.: Evaluated kinetic and photochemical data for atmospheric chemistry, organic species: Supplement VII, J. Phys. Chem. Ref. Data, 28(2), 191–393, 1999.; Barrie,~L A., Bottenheim,~J W., Schell,~R C., Crutzen,~P J., and Rasmussen,~R A.: Ozone destruction and photochemical reactions at polar sunrise in the lower Arctic atmosphere, Nature, 334, 138–140, 1988.; Berntsen,~T K., Myhre,~G., Stordal,~F., and Isaksen,~I S A.: Time evolution of tropospheric ozone and its radiative forcing, J. Geophys. Res., 105, 8915–8930, 2000.; Brasseur, G., Kiehl, J. T., Müller, J.-F., Schneider, T., Granier, C., Tie, X., and Hauglustaine, D.: Past and future changes in global tropospheric ozone: Impact on radiative forcing, Geophys. Res. Lett., 25, 3807–3810, 1998.; Brasseur, G. P., Schultz, M., Granier, C., Saunois, M., Diehl, T., Botzet, M., Roeckner, E., and Walters, S.: Impact of climate change on the future chemical composition of the global troposphere, J. Clim., 19, 3932–3951, 2006.; Butchart, N., Scaife, A. A., Bourqui, M., et al.: Simulations of anthropogenic change in the strength of the Brewer-Dobson circulation, Clim. Dynam. 27, 727–741, 2006.; Zhang, L., Brook, J. R., and Vet, R.: A revised parameterization for gaseous dry deposition in air-quality models, Atmos. Chem. Phys., 3, 2067–2082, 2003.; Carver, G. D. and Stott, P. A.: IMPACT: An implicit time integration scheme for chemical species and families, Ann. Geophys., 18, 337–346, 2000.; Collins, W. J., Derwent, R. G., Garnier, B., Johnson, C. E., Sanderson, M. G., and Stevenson, D. S.: The effect of stratosphere-troposphere exchange on the future tropospheric ozone trend, J. Geophys. Res., 108, 8528, doi:10.1029/2002JD002617, 2003. %; [Cox et al.(2000)]cox00 %Cox, P. M., Betts, R. A., Jones, C. D., Spall, S. A. and Totterdell, I. J.: %Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model, Nature, 408, 184-187, 2000.; Cox, P. M., Betts, R. A., Collins, M., Harris, P. P., Huntingford, C, and Jones, C. D.: Amazonian forest dieback under climate-carbon cycle projections for the 21st Century, Theor. Appl. Climatol., 78, 137–156, 2004.; Cullen, M. J. P.: The unified forecast/climate model, Meteorol. Mag., 122, 81–94, 1993.; DeMore,~W B., Sander,~S P., Golden,~D M., Hampson,~R F., Kurylo,~M J., Howard,~C J., Ravishankara,~A R., Kolb,~C E., and Molina,~M J.: Chemical kinetics and photochemical data for use in stratospher


Copyright © World Library Foundation. All rights reserved. eBooks from School eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.