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Mid-winter Lower Stratosphere Temperatures in the Antarctic Vortex: Comparison Between Observations and Ecmwf and Ncep Operational Models : Volume 7, Issue 2 (24/01/2007)

By Parrondo, M. C.

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Book Id: WPLBN0003987449
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: Mid-winter Lower Stratosphere Temperatures in the Antarctic Vortex: Comparison Between Observations and Ecmwf and Ncep Operational Models : Volume 7, Issue 2 (24/01/2007)  
Author: Parrondo, M. C.
Volume: Vol. 7, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2007
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Yela, M., Gil, M., Ochoa, H., Parrondo, M. C., & Der Gathen, P. V. (2007). Mid-winter Lower Stratosphere Temperatures in the Antarctic Vortex: Comparison Between Observations and Ecmwf and Ncep Operational Models : Volume 7, Issue 2 (24/01/2007). Retrieved from http://community.ebooklibrary.org/


Description
Description: Instituto Nacional de Técnica Aeroespacial, Torrejón de Ardoz, Spain. Radiosonde temperature profiles from Belgrano (78° S) and other Antarctic stations have been compared with European Centre for Medium-Range Weather Forecasting (ECMWF) and National Centers for Environmental Prediction (NCEP) operational analyses during the winter of 2003. Results show good agreement between radiosondes and NCEP and a bias in the ECMWF model which is height and temperature dependent, being up to 3°C too cold at 80 and 25–30 hPa, and hence resulting in an overestimation of the predicted potential PSC areas. Here we show the results of the comparison and discuss the potential implications that this bias might have on the ozone depletion computed by Chemical Transport Models based on ECMWF temperature fields, after rejecting the possibility of a bias in the sondes at extreme low temperatures.

Summary
Mid-winter lower stratosphere temperatures in the Antarctic vortex: comparison between observations and ECMWF and NCEP operational models

Excerpt
Chipperfield, M. and Feng W.: Comment on: Stratospheric Ozone Depletion at northern mid-latitudes in the 21st century: The importance of future concentrations of greenhouse gases nitrous oxide and methane, Geophys. Res. Lett., 30, 7, 1389, doi:10.1029/2002GL016353, 2003.; Dethof, A.: Monitoring of near-real-time SCIAMACHY, MIPAS and GOMOS data at ECMWF, ENVISAT Validation Workshop, ESA-SP531, 2003.; ECMWF: http://www.ecmwf.int/product/data/operationaSystem/evolution, 2005.; Gobiet, A., Foelsche, U., Steiner, A. K., Borsche, M., Kirchengast G., and Wickert, J.: Climatological validation of stratospheric temperatures in ECMWF operational analyses with CHAMP radio occultation data, Geophys. Res. Lett., 32, L12806, doi:10.1029/2005GL022617, 2005.; Knudsen, B. M.: On the accuracy of analysed low temperatures in the stratosphere, Atmos. Chem. Phys., 3, 1759–1768, 2003.; Höpfner, M., Luo, B. P., Massoli, P., Cairo, F., Spang, R., Snels, M., Donfrancesco, G. D., Stiller, G., von Clarmann, T., Fischer, H., and Biermann, U.: Spectroscopic evidence for NAT, STS, and ice in MIPAS infrared limb emission measurements of polar stratospheric clouds, Atmos. Chem. Phys., 6, 1201–1219, 2006a.; 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., Clarmann, T. v., and Fischer, H.: MIPAS detects Antarctic stratospheric belt of NAT PSCs caused by mountain waves, Atmos. Chem. Phys., 6, 1221–1230, 2006b.; Kistler, R., Kalnay, E., Collins, W., Saha, S., White, G., Woollen, J., Chelliah, M., Ebisuzaki, W., Kanamitsu, M., Kousky, V., van den Dool, H., Jenne, R., and Fiorino, M.: The NCEP-NCAR 50-Year Reanalysis: Monthly Means CD-ROM and Documentation, Bull. Am. Meteorol. Soc., 82, 247–268, 2001.; Knudsen, B. M., Harris, N. R. P., Andersen, S. B., Christiansen, B., Larsen, N., Rex, M., and Naujokat, B.: Extrapoling future Arctic ozone losses, Atmos. Chem. Phys. 4, 1849–1856, 2004.; Manney, G., Sabutis, J., Pawson, S., Santee, M., Naujokat, B., Swinbank R., Gelman M., and Ebisuzaki, W.: Lower stratospheric temperature differences between meteorological analyses in two cold Arctic winters and their impact on polar processing studies, J. Geophys. Res., 108, 8328, doi:10.1029/2001JD001149, 2003.; Manney, G. L., Allen, D. R., Krüger, K., Sabutis, J. L., Pawson, S., Swinbank, R., Randall, C. E., Simmons, A. J., and Long, C.: Diagnostic Comparison of meteorological analyses during the 2002 Antarctic Winter, Monthly Weather Rev., 133, 1261–1278, 2005.; Müller, M., Neuber, R., Beyerle, G., Kyro, E., Kivi, R., and Woste L.: Non-uniform PSC occurrence within the Arctic polar vortex, Geophys. Res. Lett., 28, 4175–7178, 2001.; Nash, E., Newman, P., Rosenfield J., and Schoeberl M.: An objective determination of the polar vortex using Ertel's potential vorticity, J. Geophys. Res., 101, 9471–9478, 1996.; Oort, A. H. and Liu, H.: Upper-air temperature trends over the globe, 1956-1989, J. Climate, 6, 292–307, 1993.; Väisälä, V.: Thermometer lag coefficient and radiation error. Vaisala News, 19, 1963.; Ramaswamy, V., Chanin, M-L., Angell, J., Barnett, J., Gaffen, D., Gelman, M., Keckhut, P., Koshlekov, Y., Labitzke, K., Lin, J-J., O'Neill, A., Nash, J., Randel, W., Rood, R., Shine, K., Shiotani, M., and Swinbank, R.: Stratospheric temperature trends: Observations and model simulations, Rev. Geophys., 39, 71–122, 2001.; Rex, M., Harris, N. R .P., von der Gathen, P., Lehmann, R., Braathen, G. O., Reimer, E., Beck, Chipperfield, M. P., Alfier, R., Allaart, M., O'Connor, F., Dier, H., Dorokhov, V., Fast, H., Gil, M., Kyro, E., Litynska, Z., Mikkelsen, I. S., Molyneux, M. G., Nakane, H., Notholt, J., Rummukainen, M., Viatte P., and Wenger J.: Prolonged stratospheric ozone loss in the 1995/96 Arctic winter, Nature, 389, 835–838, 1997.; Rex, M., Salawitch, R. J., von der Gathen, P., Ha

 

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