Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 9 1 2009 10.5194/acpd-9-3401-2009 http://www.atmos-chem-phys-discuss.net/9/3401/2009/ http://www.atmos-chem-phys-discuss.net/9/3401/2009/acpd-9-3401-2009.html http://www.atmos-chem-phys-discuss.net/9/3401/2009/acpd-9-3401-2009.pdf 3401 3434 2009-02-03 Do gravity waves significantly impact PSC occurrence in the Antarctic? A. J. McDonald adrian.mcdonald@canterbury.ac.nz S. E. George R. M. Woollands Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand This study uses a combination of POAM III aerosol extinction measurements and CHAMP GPS/RO temperature measurements to examine the role of atmospheric gravity waves in Polar Stratospheric Cloud (PSC) formation in the Antarctic. POAM III aerosol extinction observations are used to identify Type I Polar Stratospheric Clouds using an unsupervised clustering algorithm. The seasonal and spatial distribution of PSCs observed by POAM III is examined to determine whether there is a bias towards regions of high wave activity early in the Antarctic winter which may enhance PSC formation. <br><br> Examination of the probability of temperatures below the Type Ia formation temperature threshold based on UKMO analyses displays a good correspondence to the PSC occurrence derived from POAM III extinction data in general. However, in June the POAM III observations of PSC are more abundant than expected from temperature thresholds. In addition the PSC occurrence based on temperature thresholds in September and October is often significantly higher than the PSC occurrence observed by POAM III, this observation probably being due to dehydration and denitrification. Use of high resolution temperatures from CHAMP GPS/RO observations provide a slightly improved relationship to the POAM III derived values. Analysis of the CHAMP temperature observations indicates that temperature perturbations associated with gravity waves may explain the enhanced PSC incidence observed in June compared to the UKMO analyses. Comparison of the UKMO analyses temperatures relative to corresponding CHAMP observations also suggests a small warm bias in the UKMO analyses during June. Examination of the longitudinal structure PSC occurrence in June 2005 also shows that regions of enhancement are associated with data near the Antarctic peninsula a known Mountain wave "hotspot". The impact of temperature perturbations causing enhanced temperature threshold crossings is shown to be particularly important early in the Antarctic winter while later in the season temperature perturbations associated with gravity waves could contribute to about 15% of the PSC observed, a value which corresponds well to several previous studies. Alfred, J., Fromm, M., Bevilacqua, R., Nedoluha, G., Strawa, A., Poole, L., and Wickert, J.: Observations and analysis of polar stratospheric clouds detected by POAM III and SAGE III during the SOLVE II/VINTERSOL campaign in the 2002/2003 Northern Hemisphere winter, Atmos. Chem. Phys., 7, 2151–2163, 2007. Baumgaertner, A. J G. and McDonald, A J.: A gravity wave climatology for Antarctica compiled from Challenging Minisatellite Payload/Global Positioning System (CHAMP/GPS) radio occultations, J. Geophys. Res.-Atmos., 112, D05103, doi:10.1029/2006JD007504, 2007. Carslaw, K S., Luo, B P., Clegg, S L., Peter, T., Brimblecombe, P., and Crutzen, P J.: Stratospheric Aerosol Growth and Hno3 Gas-Phase Depletion from Coupled Hno3 and Water-Uptake by Liquid Particles, Geophys. Res. Lett., 21, 2479–2482, 1994. Carslaw, K S., Wirth, M., Tsias, A., Luo, B P., Dornbrack, A., Leutbecher, M., Volkert, H., Renger, W., Bacmeister, J T., Reimers, E., and Peter, T H.: Increased stratospheric ozone depletion due to mountain-induced atmospheric waves, Nature, 391, 675–678, 1998. Felton, M A., A., K T., Omar, A H., and A., H C.: Classification of Polar Stratospheric Clouds Using LIDAR Measurements From the SAGE III Ozone Loss and Validation Experiment, Tech. Rep. ARL-TR-4154, 2007. Fromm, M., Alfred, J., and Pitts, M.: A unified, long-term, high-latitude stratospheric aerosol and cloud database using SAM II, SAGE II, and POAM II/III data: Algorithm description, database definition, and climatology, J. Geophys. Res.-Atmos., 108(D12), 43666, doi:10.1029/2002JD002772, 2003. Fromm, M D., Lumpe, J D., Bevilacqua, R M., Shettle, E P., Hornstein, J., Massie, S T., and Fricke, K H.: Observations of Antarctic polar stratospheric clouds by POAM II: 1994–1996, J. Geophys. Res.-Atmos., 102, 23 659–23 672, 1997. Hanson, D. and Mauersberger, K.: Laboratory Studies of the Nitric-Acid Trihydrate – Implications for the South Polar Stratosphere, Geophys. Res. Lett., 15, 855–858, 1988. Hitchman, M H., Buker, M L., Tripoli, G J., Browell, E V., Grant, W B., McGee, T J., and Burris, J F.: Nonorographic generation of Arctic polar stratospheric clouds during December 1999, J. Geophys. Res.-Atmos., 108(D5), 8325, doi:10.29/2001JD001034, 2003. Hopfner, M., Blumenstock, T., Hase, F., Zimmermann, A., Flentje, H., and Fueglistaler, S.: Mountain polar stratospheric cloud measurements by ground based FTIR solar absorption spectroscopy, Geophys. Res. Lett., 28, 2189–2192, 2001. Höpfner, M., Larsen, N., Spang, R., Luo, B. P., Ma, J., Svendsen, S. H., Eckermann, S. D., Knudsen, B., Massoli, P., Cairo, F., Stiller, G., v. Clarmann, T., and Fischer, H.: MIPAS detects Antarctic stratospheric belt of NAT PSCs caused by mountain waves, Atmos. Chem. Phys., 6, 1221–1230, 2006. Huck, P E., McDonald, A J., Bodeker, G E., and Struthers, H.: Interannual variability in Antarctic ozone depletion controlled by planetary waves and polar temperature, Geophys. Res. Lett., 32, L13819, doi:10.1029/2005GL022943, 2005. Innis, J L. and Klekociuk, A R.: Planetary wave and gravity wave influence on the occurrence of polar stratospheric clouds over Davis Station, Antarctica, seen in lidar and radiosonde observations, J. Geophys. Res.-Atmos., 111, D22102, doi:10.1029/2006JD007629, 2006. Irie, H., Pagan, K L., Tabazadeh, A., Legg, M J., and Sugita, T.: Investigation of polar stratospheric cloud solid particle formation mechanisms using ILAS and AVHRR observations in the Arctic, Geophys. Res. Lett., 31, L15107, doi:10.1029/2004GL020246, 2004. Jakob, C. and Tselioudis, G.: Objective identification of cloud regimes in the Tropical Western Pacific, Geophys. Res. Lett., 30, 2082, doi:10.1029/2003GL018367, 2003. Lowe, D. and MacKenzie, A R.: Polar stratospheric cloud microphysics and chemistry, J. Atmos. Sol.-Terr. Phy., 70, 13–40, 2008. Lucke, R L., Korwan, D R., Bevilacqua, R M., Hornstein, J S., Shettle, E P., Chen, D T., Daehler, M., Lumpe, J D., Fromm, M D., Debrestian, D., Neff, B., Squire, M., Konig-Langlo, G., and Davies, J.: The Polar Ozone and Aerosol Measurement (POAM) III instrument and early validation results, J. Geophys. Res.-Atmos., 104, 18 785–18 799, 1999. McDonald, A J. and Hertzog, A.: Comparison of stratospheric measurements made by CHAMP radio occultation and Strateole/Vorcore in situ data, Geophys. Res. Lett., 35, L11805, doi:10.1029/2008GL033338, 2008. Mergenthaler, J L., Kumer, J B., Roche, A E., and Massie, S T.: Distribution of Antarctic polar stratospheric clouds as seen by the CLAES experiment, J. Geophys. Res.-Atmos., 102, 19 161–19 170, 1997. Nedoluha, G E., Bevilacqua, R M., Fromm, M D., Hoppel, K W., and Allen, D R.: POAM measurements of PSCs and water vapor in the 2002 Antarctic vortex, Geophys. Res. Lett., 30, 1796, doi:10.1029/2003GL017577, 2003. Noel, V., Hertzog, A., Chepfer, H., and Winker, D M.: Polar stratospheric clouds over Antarctica from the CALIPSO spaceborne lidar, J. Geophys. Res.-Atmos., 113, D02205, doi:10.1029/2007JD008616, 2008. Pagan, K L., Tabazadeh, A., Drdla, K., Hervig, M E., Eckermann, S D., Browell, E V., Legg, M J., and Foschi, P G.: Observational evidence against mountain-wave generation of ice nuclei as a prerequisite for the formation of three solid nitric acid polar stratospheric clouds observed in the Arctic in early December 1999, J. Geophys. Res.-Atmos., 109, D04312, doi:10.1029/2003JD003846, 2004. Parrondo, M. C., Yela, M., Gil, M., von der Gathen, P., and Ochoa, H.: Mid-winter lower stratosphere temperatures in the Antarctic vortex: comparison between observations and ECMWF and NCEP operational models, Atmos. Chem. Phys., 7, 435–441, 2007. Pawson, S., Kruger, K., Swinbank, R., Bailey, M., and O'Neill, A.: Intercomparison of two stratospheric analyses: Temperature relevant to polar stratospheric cloud formation, J. Geophys. Res., 104, 2041–2050, 1999. Peter, T.: Microphysics and heterogeneous chemistry of polar stratospheric clouds, Annu. Rev. Phys. Chem., 48, 785–822, 1997. Pitts, M. C., Thomason, L. W., Poole, L. R., and Winker, D. M.: Characterization of Polar Stratospheric Clouds with spaceborne lidar: CALIPSO and the 2006 Antarctic season, Atmos. Chem. Phys., 7, 5207–5228, 2007. Poole, L R. and Pitts, M C.: Polar Stratospheric Cloud Climatology Based on Stratospheric Aerosol Measurement-Ii Observations from 1978 to 1989, J. Geophys. Res.-Atmos., 99, 13 083–13 089, 1994. Saitoh, N., Hayashida, S., Sugita, T., Nakajima, H., Yokota, T., and Sasano, Y.: Variation in PSC Occurrence Observed with ILAS-II over the Antarctic in 2003, SOLA, 2, 72–75, 2006. Santee, M L., Lambert, A., Read, W G., Livesey, N J., Cofield, R E., Cuddy, D T., Daffer, W H., Drouin, B J., Froidevaux, L., Fuller, R A., Jarnot, R F., Knosp, B W., Manney, G L., Perun, V S., Snyder, W V., Stek, P C., Thurstans, R P., Wagner, P A., Waters, J W., Muscari, G., de~Zafra, R L., Dibb, J E., Fahey, D W., Popp, P J., Marcy, T P., Jucks, K W., Toon, G C., Stachnik, R A., Bernath, P F., Boone, C D., Walker, K A., Urban, J., and Murtagh, D.: Validation of the Aura Microwave Limb Sounder HNO₃ measurements, J. Geophys. Res.-Atmos., 112, D24540, doi:10.1029/2007JD008721, 2007. Shibata, T., Sato, K., Kobayashi, H., Yabuki, M., and Shiobara, M.: Antarctic polar stratospheric clouds under temperature perturbation by nonorographic inertia gravity waves observed by micropulse lidar at Syowa Station, J. Geophys. Res.-Atmos., 108(D3), 4105, doi:10.1029/2002JD002713, 2003. Solomon, S., Garcia, R R., Rowland, F S., and Wuebbles, D J.: On the Depletion of Antarctic Ozone, Nature, 321, 755–758, 1986. Strawa, A W., Drdla, K., Fromm, M., Pueschel, R F., Hoppel, K W., Browell, E V., Hamill, P., and Dempsey, D P.: Discriminating types Ia and Ib polar stratospheric clouds in POAM satellite data, J. Geophys. Res.-Atmos., 107(D20), 8291, doi:10.1029/2001JD000458, 2002. Svendsen, S. H., Larsen, N., Knudsen, B., Eckermann, S. D., and Browell, E. V.: Influence of mountain waves and NAT nucleation mechanisms on polar stratospheric cloud formation at local and synoptic scales during the 1999-2000 Arctic winter, Atmos. Chem. Phys., 5, 739–753, 2005. Tabazadeh, A., Jensen, E J., Toon, O B., Drdla, K., and Schoeberl, M R.: Role of the stratospheric polar freezing belt in denitrification, Science, 291, 2591–2594, 2001. Teitelbaum, H., Moustaoui, M., and Fromm, M.: Exploring polar stratospheric cloud and ozone minihole formation: The primary importance of synoptic-scale flow perturbations, J. Geophys. Res.-Atmos., 106, 28 173–28 188, 2001. Tsias, A., Wirth, M., Carslaw, K S., Biele, J., Mehrtens, H., Reichardt, J., Wedekind, C., Weiss, V., Renger, W., Neuber, R., von Zahn, U., Stein, B., Santacesaria, V., Stefanutti, L., Fierli, F., Bacmeister, J., and Peter, T.: Aircraft lidar observations of an enhanced type Ia polar stratospheric clouds during APE-POLECAT, J. Geophys. Res.-Atmos., 104, 23 961–23 969, 1999. Voigt, C., Schlager, H., Luo, B. P., Dörnbrack, A., Roiger, A., Stock, P., Curtius, J., Vössing, H., Borrmann, S., Davies, S., Konopka, P., Schiller, C., Shur, G., and Peter, T.: Nitric Acid Trihydrate (NAT) formation at low NAT supersaturation in Polar Stratospheric Clouds (PSCs), Atmos. Chem. Phys., 5, 1371–1380, 2005. Wang, K Y. and Lin, S C.: First continuous GPS soundings of temperature structure over Antarctic winter from FORMOSAT-3/COSMIC constellation, Geophys. Res. Lett., 34, L12805, doi:10.1029/2007GL030159, 2007. Wang, Z., Stephens, G., Deshler, T., Trepte, C., Parish, T., Vane, D., Winker, D., Liu, D., and Adhikari, L.: Association of Antarctic polar stratospheric cloud formation on tropospheric cloud systems, Geophys. Res. Lett., 35, L13806, doi:10.1029/2008GL034209, 2008. Wickert, J., Schmidt, T., Beyerle, G., Konig, R., and Reigber, C.: The radio occultation experiment aboard CHAMP: Operational data analysis and validation of vertical atmospheric profiles, J. Meteorol. Soc. Jpn., 82, 381–395, 2004. World Meteorological Organization: Scientific Assessment of Ozone Depletion: 2006, Global Ozone Research and Monitoring Project – Report No 50, 572 pp., Geneva, Switzerland, 2007. Wu, D L. and Jiang, J H.: MLS observations of atmospheric gravity waves over Antarctica, J. Geophys. Res.-Atmos., 107(D24), 4773, doi:10.1029/2002JD002390, 2002.