Search Results - "Rapp, Markus"

Horizontal Wavenumber Spectra Across the Middle Atmosphere From Airborne Lidar Observations During the 2019 Southern Hemispheric SSW by Knobloch, Stefanie, Kaifler, Bernd, Dörnbrack, Andreas, Rapp, Markus

“…Horizontal wavenumber spectra across the middle atmosphere are investigated based on density measurements with the Airborne Lidar for Middle Atmosphere…”
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Measurements of metastable helium in Earth’s atmosphere by resonance lidar by Kaifler, Bernd, Geach, Christopher, Büdenbender, Hans Christian, Mezger, Andreas, Rapp, Markus

“…Monitoring and predicting space weather activity is increasingly important given society’s growing reliance on space-based infrastructure but is hampered by a…”
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Gravity wave momentum fluxes from MF and meteor radar measurements in the polar MLT region by Placke, Manja, Hoffmann, Peter, Latteck, Ralph, Rapp, Markus

“…Annual cycles of horizontal winds and gravity wave (GW) momentum fluxes in the mesosphere/lower thermosphere (MLT) are presented for the medium frequency…”
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An intercomparison of stratospheric gravity wave potential energy densities from METOP GPS radio occultation measurements and ECMWF model data by Rapp, Markus, Dörnbrack, Andreas, Kaifler, Bernd

“…Temperature profiles based on radio occultation (RO) measurements with the operational European METOP satellites are used to derive monthly mean global…”
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Modeling the microphysics of mesospheric ice particles: Assessment of current capabilities and basic sensitivities by Rapp, Markus, Thomas, Gary E.

“…Considerable progress has been made over the past years concerning the experimental capabilities to observe mesospheric ice particles from space, from the…”
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Gravity waves excited during a minor sudden stratospheric warming by Dörnbrack, Andreas, Gisinger, Sonja, Kaifler, Natalie, Portele, Tanja Christina, Bramberger, Martina, Rapp, Markus, Gerding, Michael, Söder, Jens, Žagar, Nedjeljka, Jelić, Damjan

“…An exceptionally deep upper-air sounding launched from Kiruna airport (67.82∘ N, 20.33∘ E) on 30 January 2016 stimulated the current investigation of internal…”
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Effects of meteoric smoke particles on the D region ion chemistry by Baumann, Carsten, Rapp, Markus, Anttila, Milla, Kero, Antti, Verronen, Pekka T.

“…This study focuses on meteor smoke particle (MSP) induced effects on the D region ion chemistry. Hereby, MSPs, represented with an 11 bin size distribution,…”
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Composite analysis of the temporal development of waves in the polar MLT region during stratospheric warmings by Matthias, Vivien, Hoffmann, Peter, Rapp, Markus, Baumgarten, Gerd

“…During winter the wind field in the mesosphere/lower thermosphere (MLT) at middle and polar latitudes is characterized by a strong variability due to enhanced…”
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A HIGH-ALTITUDE LONG-RANGE AIRCRAFT CONFIGURED AS A CLOUD OBSERVATORY: The NARVAL Expeditions by Stevens, Bjorn, Ament, Felix, Bony, Sandrine, Crewell, Susanne, Ewald, Florian, Gross, Silke, Hansen, Akio, Hirsch, Lutz, Jacob, Marek, Kölling, Tobias, Konow, Heike, Mayer, Bernhard, Wendisch, Manfred, Wirth, Martin, Wolf, Kevin, Bakan, Stephan, Bauer-Pfundstein, Matthias, Brueck, Matthias, Delanoë, Julien, Ehrlich, André, Farrell, David, Forde, Marvin, Gödde, Felix, Grob, Hans, Hagen, Martin, Jäkel, Evelyn, Jansen, Friedhelm, Klepp, Christian, Klingebiel, Marcus, Mech, Mario, Peters, Gerhard, Rapp, Markus, Wing, Allison A., Zinner, Tobias

“…A configuration of the High-Altitude Long-Range Research Aircraft (HALO) as a remote sensing cloud observatory is described, and its use is illustrated with…”
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Mountain-Associated Waves and their relation to Orographic Gravity Waves by Hupe, Patrick, Ceranna, Lars, Pilger, Christoph, Le Pichon, Alexis, Blanc, Elisabeth, Rapp, Markus

“…Infrasound covers frequencies of around 10−3 Hz to approximately 20 Hz and can propagate in atmospheric waveguides over long distances as a result of low…”
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Secondary electron emission from meteoric smoke particles inside the polar ionosphere by Baumann, Carsten, Rapp, Markus, Kero, Antti

“…The charging by secondary electron emission (SEE) from particles is known as a significant charging process in astrophysical plasmas. This work aims at…”
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Meteor smoke particle properties derived from Arecibo incoherent scatter radar observations by Strelnikova, Irina, Rapp, Markus, Raizada, Shikha, Sulzer, Mike

“…We present a new algorithm to infer information on the properties of charged meteoric smoke particles (MSPs) from the shape of incoherent scatter radar…”
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PMSE strength during enhanced D region electron densities: Faraday rotation and absorption effects at VHF frequencies by Chau, Jorge L., Röttger, Jürgen, Rapp, Markus

“…In this paper we study the effects of absorption and Faraday rotation on measurements of polar mesosphere summer echoes (PMSE). We found that such effects can…”
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Spectral properties of mesospheric ice clouds: Evidence for nonspherical particles by Rapp, Markus, Thomas, Gary E., Baumgarten, Gerd

“…We discuss spectrally resolved measurements of the light scattering by mesospheric ice particles from lidars and satellite‐borne instruments in order to test…”
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Tidally induced variations of polar mesospheric cloud altitudes and ice water content using a data assimilation system by Stevens, Michael H., Siskind, David E., Eckermann, Stephen D., Coy, Lawrence, McCormack, John P., Englert, Christoph R., Hoppel, Karl W., Nielsen, Kim, Kochenash, Andrew J., Hervig, Mark E., Randall, Cora E., Lumpe, Jerry, Bailey, Scott M., Rapp, Markus, Hoffmann, Peter

“…A variety of spaceborne experiments have observed polar mesospheric clouds (PMC) since the late 20th century. Many of these experiments are on satellites in…”
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Seasonal and solar activity variability of D-region electron density at 69°N by Singer, Werner, Latteck, Ralph, Friedrich, Martin, Wakabayashi, Makato, Rapp, Markus

“…A narrow beam Doppler radar operating at 3.17 MHz and installed close to the Andøya Rocket Range in Andenes, Norway, (69.3°N, 16.0°E) has been providing…”
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On the nature of PMSE: Electron diffusion in the vicinity of charged particles revisited by Rapp, Markus, Lübken, Franz-Josef

“…Triggered by recent experimental evidence showing that some parts of the Cho et al. [1992] theory describing electron diffusion in the vicinity of charged…”
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Neutral air turbulence and temperatures in the vicinity of polar mesosphere summer echoes by Lübken, Franz-Josef, Rapp, Markus, Hoffmann, Peter

“…A total of 8 sounding rocket flights with measurements of neutral air turbulence in the upper mesosphere have been performed in the past 10 years with…”
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Comment on “Ice iron/sodium film as cause for high noctilucent cloud radar reflectivity” by P. M. Bellan by Rapp, Markus, Lübken, Franz-Josef

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Gravity-wave influences on Arctic mesospheric clouds as determined by a Rayleigh lidar at Sondrestrom, Greenland by Thayer, Jeffrey P., Rapp, Markus, Gerrard, Andrew J., Gudmundsson, Eggert, Kane, Timothy J.

“…Since 1994, Rayleigh lidar measurements of the Arctic middle atmosphere have been conducted at the Sondrestrom research facility near Kangerlussuaq, Greenland…”
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