Results 91 to 100 of about 15,587 (203)

Numerical simulations of contrail-to-cirrus transition – Part 2: Impact of initial ice crystal number, radiation, stratification, secondary nucleation and layer depth [PDF]

Atmospheric Chemistry and Physics, 2010
Simulations of contrail-to-cirrus transition were performed with an LES model. In Part 1 the impact of relative humidity, temperature and vertical wind shear was explored in a detailed parametric study.
S. Unterstrasser, K. Gierens
doaj  

Changes in cirrus cloudiness and their relationship to contrails

, 2001
Condensation trails, or contrails, formed in the wake of high-altitude aircraft have long been suspected of causing the formation of additional cirrus cloud cover.
Doelling, D.R., Doelling, David R., Schumann, U., Gierens, K., Ayers, J. Kirk, Minnis, Patrick, Palikonda, Rabindra, Minnis, P., Schumann, Ulrich, Gierens, Klaus, Ayers, J.K., Palikonda, R.   +11 more
core  

Towards determining the efficacy of contrail cirrus [PDF]

, 2020
Contrail cirrus has been emphasized as the largest individual component of aircraft climate impact, yet respective assessments are based mainly on conventional radiative forcing calculations.
Bock, Lisa, Ponater, Michael, Bickel, Marius, Burkhardt, Ulrike   +3 more
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Observing cirrus formation and decay with METEOSAT

, 2009
Cirrus clouds have a substantial impact on net radiation and therefore also on climate, but the physical processes involved in cirrus formation and decay are not very well represented in climate and weather prediction models. In-situ formation of natural
Graf, Kaspar, Mannstein, Hermann, Kox, Stephan, Schumann, Ulrich, Mayer, Bernhard   +4 more
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An overview of the microphysical structure of cirrus clouds observed during EMERALD-1

, 2004
High-resolution ice microphysical, turbulence, heat and water vapour flux data in cirrus clouds were collected by the Airborne Research Australia’s (ARA) Egret Grob 520T research aircraft during the first EgretMicrophysics with Extended Radiation and ...
Busen, Reinhold, D. Figueras-nieto, T. W. Choularton, J. Hacker, Cook, C., Flynn, M, Whiteway, J, Choularton, T. W.; id_orcid, M. W. Gallagher, P. J. Connolly, Flynn, M., Hacker, Jorg Michael, Gallagher, M.W., Whiteway, J., Figueras-Nieto, D, Conolly, P.J., Bower, K.N., Gallagher, Martin W.; id_orcid, Bower, K. N.; id_orcid, Hacker, J., Cook, C, Figueras-Nieto, D., Connolly, P. J., Choularton, T W, J. Whiteway, Bower, K N, Busen, G, Figueras-Nieto, Daniel, Busen, R., M. Flynn, R. Busen, Connolly, P J, K. N. Bower, Choularton, T.W., Gallagher, M W, Flynn, M.; id_orcid, C. Cook   +36 more
core   +1 more source

Reduced contrail radiative effect for fleets with low soot and water vapour emissions

Atmospheric Environment: X
Besides the goal of net-zero carbon dioxide (CO2) emissions, reducing aviation’s climate impact also involves addressing other forcing effects, particularly radiative forcing from contrails.
Milenko Rubin-Zuzic, Luca Bugliaro, Andreas Marsing, Ziming Wang, Christiane Voigt, Christopher Simson, Sascha Kaiser, Paul Ziegler   +7 more
doaj   +1 more source

The shortwave to longwave ratio in contrail radiative forcing as evident in two radiation schemes used for global GCMs

, 2013
Contrail radiative forcing is difficult to obtain, even if contrail parameters like coverage, ice water content, crystal size etc. are known. Respective results as documented in literature hint to a substantial uncertainty.
Bock, Lisa, Ponater, Michael, Dietmüller, Simone, Frömming, Christine   +3 more
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Potential Radiative Impact of Contrail Coverage over Continental USA Estimated from AVHRR Data

, 1999
Contrails are a potential factor in anthropogenic climate change because they often form in aircraft exhaust and can develop into persistent cirrus clouds.
Rabindra Palikonda, Patrick Minnis, Ulrich Schumann, Schumann, U., David R. Doelling, Hermann Mannstein, Doelling, D.R., Minnis, P., Duda, D.P., Mannstein, H., David P. Duda, Patrick W. Heck, Heck, P.W., Palikonda, R.   +13 more
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Climate impact assessment of varying cruise flight altitudes applying the CATS simulation approach

, 2011
The present paper describes a comprehensive assessment and modelling approach that was developed in the DLR project Climate compatible Air Transport System (CATS) with the goal to analyze different options to reduce the climate impact of aviation.
Koch, Alexander, Plohr, Martin, Schumann, Ulrich, Litz, Markus, Gollnick, Volker, Dahlmann, Katrin, Linke, Florian, Grewe, Volker, Lührs, Benjamin, Nagel, Björn   +9 more
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Verification for Different Contrail Parameterizations Based on Integrated Satellite Observation and ECMWF Reanalysis Data

Advances in Meteorology, 2017
Aviation induced cloud termed contrail plays a more and more important role in the climate change, which makes a significant contribution to anthropogenic climate forcing through impacting the coverage of cirrus in the intersection of troposphere and ...
Jinglin Zhang, Jian Shang, Guoyu Zhang
doaj   +1 more source