Results 31 to 40 of about 753 (136)

Airborne observations of the Eyjafjalla volcano ash cloud over Europe during air space closure in April and May 2010 [PDF]

Atmospheric Chemistry and Physics, 2011
Airborne lidar and in-situ measurements of aerosols and trace gases were performed in volcanic ash plumes over Europe between Southern Germany and Iceland with the Falcon aircraft during the eruption period of the Eyjafjalla volcano between 19 April and ...
U. Schumann, B. Weinzierl, O. Reitebuch, H. Schlager, A. Minikin, C. Forster, R. Baumann, T. Sailer, K. Graf, H. Mannstein, C. Voigt, S. Rahm, R. Simmet, M. Scheibe, M. Lichtenstern, P. Stock, H. Rüba, D. Schäuble, A. Tafferner, M. Rautenhaus, T. Gerz, H. Ziereis, M. Krautstrunk, C. Mallaun, J.-F. Gayet, K. Lieke, K. Kandler, M. Ebert, S. Weinbruch, A. Stohl, J. Gasteiger, S. Groß, V. Freudenthaler, M. Wiegner, A. Ansmann, M. Tesche, H. Olafsson, K. Sturm   +37 more
doaj   +1 more source

How well can brightness temperature differences of spaceborne imagers help to detect cloud phase? A sensitivity analysis regarding cloud phase and related cloud properties [PDF]

Atmospheric Measurement Techniques
This study investigates the sensitivity of two brightness temperature differences (BTDs) in the infrared (IR) window of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) to various cloud parameters in order to understand their information ...
J. Mayer, B. Mayer, B. Mayer, L. Bugliaro, R. Meerkötter, C. Voigt, C. Voigt   +6 more
doaj   +1 more source

Hindcasting and forecasting of regional methane from coal mine emissions in the Upper Silesian Coal Basin using the online nested global regional chemistry–climate model MECO(n) (MESSy v2.53) [PDF]

Geoscientific Model Development, 2020
Methane is the second most important greenhouse gas in terms of anthropogenic radiative forcing. Since pre-industrial times, the globally averaged dry mole fraction of methane in the atmosphere has increased considerably.
A.-L. Nickl, M. Mertens, A. Roiger, A. Fix, A. Amediek, A. Fiehn, C. Gerbig, M. Galkowski, M. Galkowski, A. Kerkweg, A. Kerkweg, T. Klausner, M. Eckl, P. Jöckel   +13 more
doaj   +1 more source

Large present-day and future climate forcing due to non-CO2 emissions from global transport

npj Climate and Atmospheric Science
Emissions from land-based transport, aviation, and shipping contribute significantly to climate change. Besides CO2, these emissions include short-lived compounds that affect air quality but are also climatically relevant.
Johannes Hendricks, Mattia Righi, Sabine Brinkop, Katrin Dahlmann, Mariano Mertens, Christof G. Beer, Volker Grewe, J. Christopher Kaiser, Michael Ponater   +8 more
doaj   +1 more source

The contribution of transport emissions to ozone mixing ratios and methane lifetime in 2015 and 2050 in the Shared Socioeconomic Pathways (SSPs) [PDF]

Atmospheric Chemistry and Physics
We quantify the contributions of emissions from the transport sector to tropospheric ozone and the hydroxyl radical (OH) by means of model simulations with a global chemistry-climate model equipped with a source attribution method.
M. Mertens, S. Brinkop, P. Graf, V. Grewe, V. Grewe, J. Hendricks, P. Jöckel, A. Lanteri, S. Matthes, V. S. Rieger, V. S. Rieger, M. Righi, R. N. Thor   +12 more
doaj   +1 more source

Passivierung von Defektzuständen in organischen n‐Typ‐Ladungstransferkomplexen durch molekularen Sauerstoff

Angewandte Chemie, EarlyView.
O2 verbessert den Ladungstransfer in organischen n‐Typ‐Donor‐Akzeptor‐Ladungstransferkomplexen (CTCs) durch physisorptive Passivierung von Ladungsträgerfallen. Durch die Unterdrückung der Rekombination und die Förderung langlebiger delokalisierter Ladungsträger verbessert O2 den Elektronentransport und die Leitfähigkeit ohne Dotierung.
Kirill K. Gubanov, Yana Reva, Christian L. Ritterhoff, Fabio Candolfi, Daniel Langford, Maximilian Herm, Evanie Franz, Ryan W. Crisp, Frank Hampel, Michael Krieger, Andreas Späth, Benjamin Watts, Jörg Libuda, Heiko B. Weber, Bernd Meyer, Dirk M. Guldi, Rainer H. Fink   +16 more
wiley   +1 more source

How elevated sources can cause local increases of sound pressure levels in the upwind domain

Acta Acustica
While increased sound levels near the ground in downwind conditions are a well-studied topic, comparatively little attention has been given in the literature to increased sound pressure levels in upwind propagation.
Baumann Katharina, Gharbi Sirine, Juliust Hessel, Schady Arthur   +3 more
doaj   +1 more source

Bionisch inspirierte Strahlungskühlung: Kühlen wie die Silberameise

Physik in unserer Zeit, EarlyView.
Wie kann ein wenige Millimeter großes Insekt helfen, Gebäude ohne Strom zu kühlen? Die Silberameise überlebt extreme Hitze mithilfe raffinierter Mikrostrukturen, die einen Großteil des Sonnenlichts zurückwerfen und gleichzeitig thermische Energie über Infrarotstrahlung in den Weltraum abführen.
Ille C. Gebeshuber, Markus Zimmerl
wiley   +1 more source

Cloud Top Thermodynamic Phase from Synergistic Lidar-Radar Cloud Products from Polar Orbiting Satellites: Implications for Observations from Geostationary Satellites

Remote Sensing, 2023
The cloud thermodynamic phase is a crucial parameter to understand the Earth’s radiation budget, the hydrological cycle, and atmospheric thermodynamic processes.
Johanna Mayer, Florian Ewald, Luca Bugliaro, Christiane Voigt   +3 more
doaj   +1 more source

Neue Einblicke in ein Schlüsselmaterial für Planetenphysik, Fusion und Materialforschung: Flüssiger Kohlenstoff

Physik in unserer Zeit, EarlyView.
Mit Hilfe der ultrahellen Röntgenpulse des European XFEL und einem speziellen Hochenergielaser konnte die Struktur von flüssigem Kohlenstoff bei Drücken von über einer Million Atmosphären und Temperaturen von etwa 7000 K bestimmt werden. Dieser Ansatz offenbarte eine komplexe Flüssigkeit mit einer wasserähnlichen Struktur und im Mittel vier ...
Dominik Kraus, Ulf Zastrau
wiley   +1 more source