Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 8 5 2008 10.5194/acpd-8-17739-2008 http://www.atmos-chem-phys-discuss.net/8/17739/2008/ http://www.atmos-chem-phys-discuss.net/8/17739/2008/acpd-8-17739-2008.html http://www.atmos-chem-phys-discuss.net/8/17739/2008/acpd-8-17739-2008.pdf 17739 17762 2008-09-29 Severe ozone air pollution in the Persian Gulf region J. Lelieveld j.lelieveld@cyi.ac.cy P. Hoor P. Jöckel A. Pozzer P. Hadjinicolaou J.-P. Cammas Energy, Environment and Water Research Centre, The Cyprus Institute, Nicosia, Cyprus MPI for Chemistry (Otto Hahn Institute), Mainz, Germany Observatoire Midi-Pyrénées, CNRS – Laboratoire d'Aérologie, Toulouse, France Recently it was discovered that over the Middle East during summer ozone mixing ratios can reach a pronounced maximum in the middle troposphere. Here we extend the analysis to the surface and show that especially in the Persian Gulf region conditions are highly favorable for ozone air pollution. Model results indicate that the region is a hot spot of photo-smog where air quality standards are violated throughout the year. Long-distance transports of air pollution from Europe, the Middle East, natural emissions and stratospheric ozone conspire to bring about high background ozone mixing ratios. This provides a hotbed to indigenous air pollution in the dry local weather conditions, which are likely to get worse in future. Ayres, J., Maynard, R., and Richards, R.: Air pollution and health, Imperial College Press, London, UK, 248 pp., 2006. Barret, B., Ricaud, P., Mari, C., Attié, J.-L., Bousserez, N., Josse, B., Le Flochmoën, E., Livesey, N. J., Massart, S., Peuch, V.-H., Piacentini, A., Sauvage, B., Thouret, V., and Cammas, J.-P.: Transport pathways of CO in the African upper troposphere during the monsoon season: a study based upon the assimilation of spaceborne observations, Atmos. Chem. Phys., 8, 3231–3246, 2008. Bell, M. L., Peng, R. D., and Dominici, F.: The exposure-response curve for ozone and risk of mortality and the adequacy of current ozone regulations, Environ. Health Perspect., 114, 532–536, 2006. de Laat, A. T. J. and Lelieveld, J.: Diurnal ozone cycle in the marine boundary layer, J. Geophys. Res., 105, 11 547–11 559, 2000. Diffenbaugh, N. S., Pal, J. S., Giorgi, F., and Gao, X.: Heat stress intensification in the Mediterranean climate change hotspot, Geophys. Res. Lett., 34, L11706, doi:10.1029/2007GL030000, 2007. Duncan, B. N. and Bey, I.: A modeling study of the export pathways of pollution from Europe: Seasonal and interannual variations (1987–1997), J. Geophys. Res., 109, D08301, doi:10.1029/2003JD004079, 2004. Duncan, B. N., West, J. J., Fiore, A. M., and Ziemke, J. R.: The influence of European pollution on ozone in the Near East and northern Africa, Atmos. Chem. Phys., 8, 2267–2283, 2008. Emberson, L., Ashmore, M., and Murray, F.: Air pollution impacts on crops and forests: a global assessment, Imperial College Press, London, UK, 372 pp., 2003. Ganzeveld, L. N., van Aardenne, J. A., Butler, T. M., Lawrence, M. G., Metzger, S. M., Stier, P., Zimmermann, P., and Lelieveld, J.: Technical Note: Anthropogenic and natural offline emissions and the online EMissions and dry DEPosition submodel EMDEP of the Modular Earth Submodel system (MESSy), Atmos. Chem. Phys. Discuss., 6, 5457–5483, 2006. Giorgetta, M. A., Manzini, E., Roeckner, E., Esch, M., and Bengtsson, L.: Climatology and forcing of the quasi-biennial oscillation in the MAECHAM5 model, J. Climate, 19, 3882–3901, 2006. Giorgi, F. and Bi, X.: Updated regional precipitation and temperature changes for the 21st century from ensembles of recent AOGCM simulations, Geophys. Res. Lett., 32, L21715, doi:10.1029/2005GL024288, 2005. Gryparis, A., Forsberg, B., Katsouyanni, K., et al.: Acute effects of ozone on mortality from the "Air pollution and health: a European approach" project, Am. J. Respir. Crit. Care Med., 170, 1080–1087, 2004. Gurjar, B. R., Butler, T. M., Lawrence, M. G., and Lelieveld, J.: Evaluation of emissions and air quality in megacities, Atmos. Environ., 42, 1593–1606, 2008. Held, I. M. and Soden, B. J.: Robust responses of the hydrological cycle to global warming, J. Climate, 19, 5686–5699, 2006. Jöckel, P., Tost, H., Pozzer, A., Brühl, C., Buchholz, J., Ganzeveld, L., Hoor, P., Kerkweg, A., Lawrence, M. G., Sander, R., Steil, B., Stiller, G., Tanarhte, M., Taraborelli, D., van Aardenne, J., and Lelieveld, J.: The atmospheric chemistry general circulation model ECHAM5/MESSy: Consistent simulation of ozone from the surface to the mesosphere, Atmos. Chem. Phys., 6, 5067–5104, 2006. Kerkweg, A., Sander, R., Tost, H., and Jöckel, P.: Technical Note: Implementation of prescribed (OFFLEM), calculated (ONLEM), and pseudo-emissions (TNUDGE) of chemical species in the Modular Earth Submodel System (MESSy), Atmos. Chem. Phys., 6, 3603–3609, 2006. Kallos, G., Kotroni, V., Lagouvardos, K., and Papadopoulos, A.: On the long-range transport of air pollutants from Europe to Africa, Geophys. Res. Lett., 25, 619–622, 1998. Kouvarakis, G., Vrekoussis, M., Mihalopoulos, N., Kourtidis, K., Rappenglueck, B., Gerasopoulos, E., and Zerefos, C.: Spatial and temporal variability of tropospheric ozone (O$_3)$ in the boundary layer above the Aegean Sea (eastern Mediterranean), J. Geophys. Res., 107, 8137, doi:10.1029/2000JD000081, 2002. Lelieveld, J., Berresheim, H., Borrmann, S., et al.: Global air pollution crossroads over the Mediterranean, Science, 298, 794–799, 2002. Lelieveld, J., van Aardenne, J., Fischer, H., de Reus, M., Williams, J., and Winkler, P.: Increasing ozone over the Atlantic Ocean, Science, 304, 1483–1487, 2004. Lelieveld, J., Brühl, C., Jöckel, P., Steil, B., Crutzen, P. J., Fischer, H., Giorgetta, M. A., Hoor, P., Lawrence, M. G., Sausen, R., and Tost, H.: Stratospheric dryness: model simulations and satellite observations, Atmos. Chem. Phys., 7, 1313–1332, 2007. Li., Q., Jacob, D. J., Logan, J. A., Bey, I., Yantosca, R. M., Liu, H., Martin, R. V., Fiore, A. M., Field, B. D., and Duncan, B. N.: A tropospheric ozone maximum over the Middle East, Geophys. Res. Lett., 28, 3235–3238, 2001. Osterman, G. B., Kulawik, S. S., Worden, H. M., Richards, N. A. D., Fisher, B. M., Eldering, A., Shephard, M. W., Froidevaux, L., Labow, G., Luo, M., Herman, R. L., Bowman, K. W., and Thompson, A. M.: Validation of Tropospheric Emission Spectrometer (TES) measurements of the total, stratospheric, and tropospheric column abundance of ozone, J. Geophys. Res., 113, D15S16, doi:10.1029/2007JD008801, 2008 Pozzer, A., Jöckel, P., Tost, H., Sander, R., Ganzeveld, L., Kerkweg, A., and Lelieveld, J.: Simulating organic species with the global atmospheric chemistry general circulation model ECHAM5/MESSy1: a comparison of model results with observations, Atmos. Chem. Phys., 7, 2527–2550, 2007. Roeckner, E., Brokopf, R., Esch, M., Giorgetta, M., Hagemann, S., Kornblüh, L., Manzini, L. E., Schlese, U., and Schulzweida, U.: Sensitivity of simulated climate to horizontal and vertical resolution in the ECHAM5 atmosphere model, J. Climate, 19, 3771–3791, 2006. Rodwell, M. J. and Hoskins, B. J.: Subtropical anticyclones and the summer monsoon, J. Climate, 14, 3192–3211, 2001. Sander, R., Kerkweg, A., Jöckel, P., and Lelieveld, J.: Technical note: The new comprehensive atmospheric chemistry module MECCA, Atmos. Chem. Phys., 5, 445–450, 2005. Seidel, D. J., Fu, Q., Randel, W. J., and Reichler, T. J.: Widening of the tropical belt in a changing climate, Nature Geosc., 1, 21–24, 2008. Singh, H. B., Chen, Y., Thakur, A. N., Kondo, Y., Talbot, R. W., Gregory, G. L., Sachse, G. W., Blake, D. R., Bradshaw, J. D., Wang, Y., and Jacob, D. J.: Latitudinal distribution of reactive nitrogen in the free troposphere over the Pacific Ocean in late winter/early spring, J. Geophys. Res., 103, 28 237–28 246, 1998. Stohl, A., Eckhardt, S., Forster, C., James, P., and Spichtinger, N.: On the pathways and timescales of intercontinental air pollution transport, J. Geophys. Res., 107, 4684, doi:10.1029/2001JD001396, 2002. Stavrakou, T., Müller, J.-F., Boersma, K. F., De Smedt, I., and van der A, R. J.: Assessing the distribution and growth rates of NO_x emission sources by inverting a 10-year recors of NO₂ columns, Geophys. Res. Lett., 35, L10801, doi: 10.1029/2008GL033521, 2008. Sun, Y., Solomon, S., Dai, A., and Portmann, R. W.: How often will it rain?, J. Climate, 20, 4801–4818, 2007. Thouret, V., Marenco, A., Logan, J. A., Nédélec, P., and Grouhel, C.: Comparisons of ozone measurements from the MOZAIC airborne program and the ozone sounding network at eight locations, J. Geophys. Res., 103, 695–720, 1998. Tost, H., Jöckel, P., Kerkweg, A., Sander, R., and Lelieveld, J.: Technical note: A new comprehensive SCAVenging submodel for global atmospheric chemistry modelling, Atmos. Chem. Phys., 6, 565–574, 2006. Traub., M. and Lelieveld, J.: Cross-tropopause transport over the eastern Mediterranean, J. Geophs. Res. 108, 4712, doi:10.1029/2003JD003745, 2003. van der A, R. J., Eskes, H. J., Boersma, K. F., van Noije, T. P. C., van Roozendaal, M., de Smedt, I., Peters, D. H. M. U., and Meijer, E. W.: Trends, seasonal variability and dominant NO_x sources derived from a ten year recors of NO₂ measured from space, J. Geophys. Res., 113, D04302, doi:10.1029/2007JD009021, 2008. Vardavas, I. M. and Taylor, F. W.: Radiation and climate, Oxford University Press, Oxford, 512 pp., UK, 2007. Worden, H. M., Logan, J. A., Worden, J. R., Beer, R., Bowman, K., Clough, S. A., Eldering A., Fischer, B. M., Gunson, M. R., Herman, R. L., Kulawik, S. S., Lampel, M. C., Luo, M., Megretskaia, I. A., Osterman, G. B., and Shephard, M. W.: Comparisons of Tropospheric Emission Spectrometer (TES) ozone profiles to ozonesondes: Methods and initial results, J. Geophys. Res., 112, D03309, doi:10.1029/2006JD007258, 2007. Zbinden, R. M., Cammas, J.-P., Thouret, V., Nèdèlec, P., Karcher, F., and Simon, P.: Mid-latitude tropospheric ozone columns from the MOZAIC program: climatology and interannual variability, Atmos. Chem. Phys., 6, 1053–1073, 2006.