Results 61 to 70 of about 14,750 (194)

Cherenkov Telescope Array Observatory: Die Zukunft der Gammaastronomie

Physik in unserer Zeit, Volume 57, Issue 1, Page 10-18, January 2026.
Im Jahr 1989 hat das Wipple‐Observatorium die erste Quelle hochenergetischer Gammastrahlung entdeckt. 2002 waren dann sechs Quellen bekannt, 2024 schon mehr als 300. Und das ist immer noch lediglich die Spitze des Eisbergs in der jungen Geschichte der Gammaastronomie.
Daniela Hadasch, Daniel Mazin
wiley   +1 more source

Airborne quantification of Angolan offshore oil and gas methane emissions [PDF]

Atmospheric Chemistry and Physics
In September 2022, the METHANE-To-Go Africa (MTGA) scientific aircraft campaign, part of UNEP's International Methane Emissions Observatory (IMEO) Methane Science Studies, conducted the first methane (CH4) emissions measurements from the offshore oil and
A. Fiehn, M. Eckl, M. Pühl, T. Bräuer, K.-D. Gottschaldt, H. Aufmhoff, L. Eirenschmalz, L. Eirenschmalz, G. Neumann, F. Sakellariou, D. Sauer, R. Baumann, G. De Aguiar Ventura, W. N. Cadete, D. L. Zua, M. Xavier, P. Correia, A. Roiger   +17 more
doaj   +1 more source

Contrail life cycle and properties from 1 year of MSG/SEVIRI rapid-scan images [PDF]

Atmospheric Chemistry and Physics, 2015
The automatic contrail tracking algorithm (ACTA) – developed to automatically follow contrails as they age, drift and spread – enables the study of a large number of contrails and the evolution of contrail properties with time. In this paper we present a
M. Vázquez-Navarro, H. Mannstein, S. Kox   +2 more
doaj   +1 more source

When tiny convective spread affects a midlatitude jet: Spread sequence

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 775, January 2026 Part B.
We investigate spread evolution by mesoscale convection from tiny initial condition uncertainty during a real event. There is significant variation among the systems in their propensity to interact with the jet stream, whereby variability in one system (due to convective and long‐wave radiative heating tendencies) tightly relates to Rossby‐like ...
Edward Groot, Michael Riemer
wiley   +1 more source

Characterisation of the artificial neural network CiPS for cirrus cloud remote sensing with MSG/SEVIRI [PDF]

Atmospheric Measurement Techniques, 2017
Cirrus clouds remain one of the key uncertainties in atmospheric research. To better understand the properties and physical processes of cirrus clouds, accurate large-scale observations from satellites are required.
J. Strandgren, J. Fricker, L. Bugliaro
doaj   +1 more source

Interpretable Machine Learning‐Based Radiation Emulation for ICON

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 4, December 2025.
Abstract The radiation parameterization is one of the computationally most expensive components of Earth system models (ESMs). To reduce computational cost, radiation is often calculated on coarser spatial or temporal scales, or both, than other physical processes in ESMs, leading to uncertainties in cloud‐radiation interactions and thereby in ...
Katharina Hafner, Fernando Iglesias‐Suarez, Sara Shamekh, Pierre Gentine, Marco A. Giorgetta, Robert Pincus, Veronika Eyring   +6 more
wiley   +1 more source

Implication of strongly increased atmospheric methane concentrations for chemistry–climate connections [PDF]

Atmospheric Chemistry and Physics, 2019
Methane (CH4) is the second-most important directly emitted greenhouse gas, the atmospheric concentration of which is influenced by human activities. In this study, numerical simulations with the chemistry–climate model (CCM) EMAC are performed, aiming ...
F. Winterstein, F. Tanalski, F. Tanalski, P. Jöckel, M. Dameris, M. Ponater   +5 more
doaj   +1 more source

On the Lifetimes of Persistent Contrails and Contrail Cirrus

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 20, 28 October 2025.
Abstract Prediction of contrail cirrus persistence is highly problematic for models, in part due to a poor representation of intertwined microphysical and dynamical processes controlling contrail evolution in large‐scale ice‐supersaturated areas. Knowledge of contrail cirrus lifetimes is required to estimate their lifecycle‐average radiative effect ...
Bernd Kärcher, Milena Corcos
wiley   +1 more source

Circulation Aspects Associated With Heatwave Events Over Iraq

International Journal of Climatology, Volume 45, Issue 12, October 2025.
We find that heatwaves in Southern Iraq are typically associated with a weakening of the north‐westerly Shamal wind, which usually induces a persistent cooling effect. Different mechanisms can lead to a weakening of the Shamal wind: one possibility is circulation anomalies induced by anticyclones embedded in quasi‐stationary synoptic Rossby waves ...
Hasanain AL‐Shamarti, Philip Rupp, Thomas Birner   +2 more
wiley   +1 more source

Energieeffizienz & Rebound-Effekte im Kontext der Energiewende [PDF]

, 2015
Abschlussbericht des Workshops „Energieeffizienz & Rebound-Effekte im Kontext der Energiewende“ bei der NachDenkstatt 2013, OldenburgFinal report of the workshop “Energy Efficiency and Rebound Effects in the Context of the Energiewende” during the ...
Haack, Frederik, Nagel, Manuel, Richters, Oliver, Schäfer, Ernst, Wunderlich, Sebastian   +4 more
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