Results 51 to 60 of about 753 (136)

Design study for an airborne N₂O lidar [PDF]

Atmospheric Measurement Techniques
Nitrous oxide (N2O) is the third most important greenhouse gas modified by human activities after carbon dioxide and methane. This study examines the feasibility of airborne differential absorption lidar to measure N2O concentration enhancements over ...
C. Kiemle, A. Fix, C. Fruck, G. Ehret, M. Wirth   +4 more
doaj   +1 more source

The Impact of Non‐Orographic Gravity Waves on Transport and Mixing: Effects of Oblique Propagation and Coupling to Turbulence

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.
Abstract Gravity waves (GWs) are a fundamental driver of circulation, tracer transport, and mixing in the middle and upper atmosphere, but their treatment in global circulation models remains incomplete. In particular, standard parameterizations typically restrict propagation to the vertical and treat GW–turbulence interactions in only a rudimentary ...
T. Banerjee, Y. H. Kim, G. S. Voelker, S. Borchert, A. Kosareva, D. Kunkel, G. T. Masur, Z. Prochazkova, J. Schmidli, U. Achatz   +9 more
wiley   +1 more source

Die Arktis bei 2,7 Grad globaler Erwärmung: Schwindende Landschaften

Physik in unserer Zeit, Volume 57, Issue 2, Page 58-65, March 2026.
Eine dicke Eisschicht auf dem Ozean, hunderte Meter tief gefrorener Boden und ein über 3 000 m hoher Eisschild – diese einzigartige Landschaft wird es vermutlich so in Zukunft nicht mehr geben. Eine globale Erwärmung von 2,7 °C, auf die wir aktuell zusteuern, würde die Arktis bis zur Unkenntlichkeit verändern.
Céline Giesse
wiley   +1 more source

Systematic Benchmarking of Climate Models: Methodologies, Applications, and New Directions

Reviews of Geophysics, Volume 64, Issue 1, March 2026.
Abstract As climate models become increasingly complex, there is a growing need to comprehensively and systematically assess model performance with respect to observations. Given the increasing number and diversity of climate model simulations in use, the community has moved beyond simple model intercomparison and toward developing methods capable of ...
Birgit Hassler, Forrest M. Hoffman, Rebecca Beadling, Ed Blockley, Bo Huang, Jiwoo Lee, Valerio Lembo, Jared Lewis, Jianhua Lu, Luke Madaus, Elizaveta Malinina, Brian Medeiros, Wilfried Pokam, Enrico Scoccimarro, Ranjini Swaminathan   +14 more
wiley   +1 more source

Urban greenhouse gas emissions from the Berlin area: A case study using airborne CO2 and CH4 in situ observations in summer 2018

Elementa: Science of the Anthropocene, 2020
Urban areas are recognised as a significant source of greenhouse gas emissions (GHG), such as carbon dioxide (CO2) and methane (CH4). The total amount of urban GHG emissions, especially for CH4, however, is not well quantified. Here we report on airborne
T. Klausner, M. Mertens, H. Huntrieser, M. Galkowski, G. Kuhlmann, R. Baumann, A. Fiehn, P. Jöckel, M. Pühl, A. Roiger   +9 more
doaj   +1 more source

Long-term simulation of the boundary layer flow over the double-ridge site during the Perdigão 2017 field campaign [PDF]

Atmospheric Chemistry and Physics, 2019
The Perdigão campaign 2017 was an international field campaign to measure the flow and its diurnal variation in the atmospheric boundary layer over complex terrain. A huge data set of meteorological observations was collected over the double-hill site by
J. Wagner, T. Gerz, N. Wildmann, K. Gramitzky   +3 more
doaj   +1 more source

Salzcluster mit Oberflächen‐Defekt zeigt ungewöhnliche Säure‐Base‐Chemie

Angewandte Chemie, Volume 138, Issue 7, 9 February 2026.
Die Austauschreaktion von Ameisensäure an Meersalz‐Aerosolen, bei der HCl freigesetzt wird, fordert die herkömmliche Säure‐Base‐Chemie heraus. Unsere Gasphasenversuche zeigen, dass diese Reaktion an reinen NaCl‐Clusterionen in Abwesenheit von Wasser stattfindet.
Jessica C. Hartmann, Jia Yang Lim, Yiqi Sheng, Marc Reimann, Sarah J. Madlener, Christian van der Linde, Chi‐Kit Siu, Martin K. Beyer   +7 more
wiley   +1 more source

Updating the radiation infrastructure in MESSy (based on MESSy version 2.55) [PDF]

Geoscientific Model Development
The calculation of the radiative transfer is a key component of global circulation models. In this article, we describe the most recent updates of the radiation infrastructure in the Modular Earth Submodel System (MESSy).
M. Nützel, M. Nützel, L. Stecher, P. Jöckel, F. Winterstein, M. Dameris, M. Ponater, P. Graf, M. Kunze   +8 more
doaj   +1 more source

Hochdrucksynthese von Antimonnitrid Sb3N5 und Polynitrid Sb2N8 mit einfach gebundenen N810− Ketten

Angewandte Chemie, Volume 138, Issue 6, 2 February 2026.
Hochdrucksynthesen zwischen Antimon und molekularem Stickstoff in einer laserbeheizten Diamantstempelzelle führten zur Bildung von oC32‐Sb3N5 (51(1) GPa) und mP20‐Sb2(N8) (> 100 GPa). Beide Phasen wurden mittels Einkristall‐Röntgenmikrodiffraktion identifiziert und durch Berechnungen mittels Dichtefunktionaltheorie vollständig bestätigt.
Lukas Brüning, Nityasagar Jena, Elena Bykova, Konstantin Glazyrin, Ievgeniia Iermak, Stella Chariton, Vitali B. Prakapenka, Igor A. Abrikosov, Maxim Bykov   +8 more
wiley   +1 more source

Changes in Supersaturation Inside and Around Arctic Cirrus during Warm Air Intrusion Events [PDF]

EPJ Web of Conferences
Cirrus clouds play a significant role in the radiative processes in the upper troposphere. Depending on the ambient conditions during their formation their micro- and macro-physical characteristics might differ, leading to different and potentially ...
Dekoutsidis Georgios, Grofl Silke, Wirth Martin   +2 more
doaj   +1 more source