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Simon P. Alexander and Toshitaka Tsuda

time was between 105 and 110 hPa, corresponding to a height of about 17 km. NCEP maps from other days during the campaign showed that this high-tropopause region moved away from Shigaraki, so that by 6 August, the tropopause height had lowered to about 115 hPa. The 200-hPa geopotential height is also shown in Fig. 1 , showing that this pressure level was higher over southern Japan than northern Japan at 0000 UTC 4 August. Analysis of other NCEP synoptic-scale maps showed that the 200-hPa

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Eduardo Landulfo, Alexandros Papayannis, Ani Sobral Torres, Sandro Toshio Uehara, Lucila Maria Viola Pozzetti, Caio Alencar de Matos, Patricia Sawamura, Walter Morinobu Nakaema, and Wellington de Jesus

suspended aerosol particles as a subject of continuous interest because of the ongoing expansion of the metropolitan area, which carries over 15 000 industries. The study of aerosols in such an environment is not only crucial but very important in assessing the local and regional impact on climate and population health. Aerosol data from these geographical locations in the Southern Hemisphere are not as abundant as in Europe, North America, and northern Asia. Among the several means to measure the

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Matthias Grzeschik, Hans-Stefan Bauer, Volker Wulfmeyer, Dirk Engelbart, Ulla Wandinger, Ina Mattis, Dietrich Althausen, Ronny Engelmann, Matthias Tesche, and Andrea Riede

height (not shown) shows that a westerly to northwesterly flow was present up into the midtroposphere. However, eastern Germany was already located beneath a northward-extending ridge that slowly moved to the east. In the region of the ridge, warm air was transported northward. The Meteorological Satellite (Meteosat) Second Generation (MSG) channel 6 image (water vapor, 7.6 μ m; see Fig. 3 ) provides information of the water vapor content around 500 hPa. Over southern-central Europe and over the

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V. Bellantone, I. Carofalo, F. De Tomasi, M. R. Perrone, M. Santese, A. M. Tafuro, and A. Turnone

: A numerical study. J. Atmos. Oceanic Technol. , 15 , 1043 – 1050 . 10.1175/1520-0426(1998)015<1043:TETBRO>2.0.CO;2 Allegrini, I. , Febo A. , Pasini A. , and Schiarini S. , 1994 : Monitoring of the nocturnal mixed layer by means of particulate radon progeny measurement. J. Geophys. Res. , 99 , 18765 – 18777 . 10.1029/94JD00783 Ansmann, A. , Wandinger U. , Riebesell M. , Weitkamp C. , Voss E. , Lahmann W. , and Michaelis W. , 1992 : Combined Raman elastic

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