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TILLMANN MOHR

future, it is possible t,o use today'ssatellit'e pictures to locate areas of critical pollutionpot,ential (i.e., areas with existing low-level inversions).Such area.s usually can be detected only under cloud-freeconditions in areas where a certain amount of pollut'ion isalready occurring. The two ESSA 8 pictures used as figures1 and 2 shorn West'ern and Central Europe under conditionsof great contra,st. In one, the atmosphere is relativelypollution free; in the other, pollution is prominent. Bothmere

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PICTURE OF THE MONTH

Aurora Borealis and City Lights

Henry W. Brandli

. Discussion Figure 1 is an example of a nighttime scene takennear local midnight over northern Europe. This highresolution (HR) sensor of the DMSP system "sees"in the spectral interval from 0.4 to 1.1 urn. The humaneye sees in the spectral interval from 0.4 to 0.7 um.With this sun-synchronous satellite system, nighttimecoverage of the same locations can occur once andoccasionally twice per night. Figure 1 shows the city lights of northern Europe.GeographicM location and gridding of all

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Werner Alpers, Andrei Yu. Ivanov, and Knut-Frode Dagestad

6 we present our conclusions. 2. The SAR image and the near-surface wind field Figure 1 shows a SAR image that was acquired by the Advanced Synthetic Aperture Radar (ASAR) onboard the European Envisat satellite over the Black Sea and that captured sea surface signatures of an atmospheric cyclonic eddy with a foehn wind blowing from the east onto the sea. The image was acquired in the morning at 0732 UTC (0932 local standard time) 13 September 2010 in the wide swath mode (WSM) at VV

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Andreas Dörnbrack, Sonja Gisinger, Michael C. Pitts, Lamont R. Poole, and Marion Maturilli

European Centre for Medium-Range Weather Forecasts (ECMWF) currently runs its operational predictions of the Integrated Forecast System (IFS) cycle 41r2 at 8 km globally ( Hólm et al. 2016 ; Malardel and Wedi 2016 ). Here, it will be shown that the conditions under which the observed mesoscale ice PSCs formed can be resolved by the IFS. 2. Weather situation and gravity wave characteristics a. Cold Arctic polar vortex The composite picture of the month was taken in a period when the temperatures inside

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Ernani de Lima Nascimento, Gerhard Held, and Ana Maria Gomes

Paulo, Brazil. Sixth European Conf. on Radar in Meteorology and Hydrology, Sibiu, Romania, ERAD. [Available online at http://www.erad2010.org/pdf/oral/wednesday/nowcasting/05_ERAD2010_0376.pdf .] Johns , R. H. , 1993 : Meteorological conditions associated with bow echo development in convective storms . Wea. Forecasting , 8 , 294 – 299 , doi: 10.1175/1520-0434(1993)008<0294:MCAWBE>2.0.CO;2 . Kosiba , K. , J. Wurman , Y. Richardson , P. M. Markowski , P. Robinson , and J

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