The atmospheric background situation in northern Scandinavia during January/February 2003 in the context of the MaCWAVE campaign by U. Blum, U. Blum, G. Baumgarten, A. Schöch, S. Kirkwood, B. Naujokat, K. H. Fricke

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Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar by D. Heinrich, H. Nesse, U. Blum, U. Blum, P. Acott, B. Williams, U.-P. Hoppe

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Simultaneous lidar observations of temperatures and waves in the polar middle atmosphere on the east and west side of the Scandinavian mountains: a case study on 19/20 January 2003 by U. Blum, K. H. Fricke, G. Baumgarten, A. Schöch

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Polar mesosphere winter echoes during MaCWAVE by S. Kirkwood, E. Belova, U. Blum, U. Blum, C. Croskey, P. Dalin, K.-H. Fricke, R. A. Goldberg, J. Manninen, J. D. Mitchell, F. Schmidlin

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A case study of a sporadic sodium layer observed by the ALOMAR Weber Na lidar by H. Nesse, H. Nesse, D. Heinrich, B. Williams, U.-P. Hoppe, J. Stadsnes, M. Rietveld, W. Singer, U. Blum, U. Blum, M. I. Sandanger, E. Trondsen

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Measuring appropriateness of diagnostic imaging: a scoping review by Felix Walther, Maria Eberlein-Gonska, Ralf-Thorsten Hoffmann, Jochen Schmitt, Sophia F. U. Blum

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Gravity waves in the middle atmosphere during the MaCWAVE winter campaign: evidence of mountain wave critical level encounters by L. Wang, D. C. Fritts, B. P. Williams, R. A. Goldberg, F. J. Schmidlin, U. Blum

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Observation of an unusual mid-stratospheric aerosol layer in the Arctic: possible sources and implications for polar vortex dynamics by M. Gerding, G. Baumgarten, U. Blum, J. P. Thayer, K.-H. Fricke, R. Neuber, J. Fiedler

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Long-term outcome of incidental cystic liver tumors in the general population by S. F. U. Blum, T. Ittermann, M. L. Kromrey, C. M. Dreyer, D. Seppelt, R. T. Hoffmann, H. Völzke, J. P. Kühn

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Middle atmospheric water vapour and dynamics in the vicinity of the polar vortex during the Hygrosonde-2 campaign by S. Lossow, M. Khaplanov, J. Gumbel, J. Stegman, G. Witt, P. Dalin, S. Kirkwood, F. J. Schmidlin, K. H. Fricke, U. Blum

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Geophysical validation of temperature retrieved by the ESA processor from MIPAS/ENVISAT atmospheric limb-emission measurements by M. Ridolfi, U. Blum, B. Carli, V. Catoire, S. Ceccherini, H. Claude, C. De Clercq, K. H. Fricke, F. Friedl-Vallon, M. Iarlori, P. Keckhut, B. Kerridge, J.-C. Lambert, Y. J. Meijer, L. Mona, H. Oelhaf, G. Pappalardo, M. Pirre, V. Rizi, C. Robert, D. Swart, T. von Clarmann, A. Waterfall, G. Wetzel

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