Results 21 to 30 of about 7,293 (255)

Meteorological Conditions That Promote Persistent Contrails

Applied Sciences (Switzerland), 2022
Climate-impacting contrails need ice (super-)saturation to persist longer than a few minutes. However, this simple criterion cannot be easily applied for the prediction of persistent contrails.
Lena Wilhelm, Klaus Gierens, Susanne Rohs   +2 more
exaly   +3 more sources

Operational differences lead to longer lifetimes of satellite detectable contrails from more fuel efficient aircraft

Environmental Research Letters
Clouds produced by aircraft (known as contrails) contribute over half of the positive radiative forcing from aviation, but the size of this warming effect is highly uncertain. Their radiative effect is highly dependent on the microphysical properties and
Edward Gryspeerdt, Marc E J Stettler, Roger Teoh, Ulrike Burkhardt, Toni Delovski, Oliver G A Driver, David Painemal   +6 more
doaj   +2 more sources

Using contrails and animated sequences to visualize uncertainty in dynamic sensory profiles obtained from temporal check-all-that-apply (TCATA) data

Food Quality and Preference, 2016
Approaches for analyzing temporal check-all-that-apply (TCATA) data are further developed and illustrated using data arising from a Syrah wine finish evaluation. Raw and smoothed trajectories are obtained using principal component analysis.
John C Castura
exaly   +2 more sources

Aviation effects on already-existing cirrus clouds. [PDF]

Nat Commun, 2016
Determining the effects of the formation of contrails within natural cirrus clouds has proven to be challenging. Quantifying any such effects is necessary if we are to properly account for the influence of aviation on climate. Here we quantify the effect
Tesche M, Achtert P, Glantz P, Noone KJ.
europepmc   +5 more sources

A climatology of formation conditions for aerodynamic contrails [PDF]

Atmospheric Chemistry and Physics, 2013
Aircraft at cruise levels can cause two kinds of contrails, the well known exhaust contrails and the less well-known aerodynamic contrails. While the possible climate impact of exhaust contrails has been studied for many years, research on ...
K. Gierens, F. Dilger
doaj   +1 more source

Contrail Microphysics [PDF]

Bulletin of the American Meteorological Society, 2010
This article reviews the current state of understanding of the science of contrails: 1) how they are formed, 2) their microphysical properties as they evolve into contrail cirrus and whether their microphysical properties can be distinguished from natural cirrus, and 3) the ice-nucleating properties of soot aerosols and whether these aerosols can ...
Heymsfield, A, Baumgardner, D, DeMott, P, Forster, P, Gierens, K, Karcher, B   +5 more
openaire   +4 more sources

Thin and subvisible cirrus and contrails in a subsaturated environment [PDF]

Atmospheric Chemistry and Physics, 2011
The frequency of occurrence of cirrus clouds and contrails, their life time, ice crystal size spectra and thus their radiative properties depend strongly on the ambient distribution of the relative humidity with respect to ice (RH<sub>ice< ...
M. Kübbeler, M. Hildebrandt, J. Meyer, C. Schiller, Th. Hamburger, T. Jurkat, A. Minikin, A. Petzold, M. Rautenhaus, H. Schlager, U. Schumann, C. Voigt, P. Spichtinger, J.-F. Gayet, C. Gourbeyre, M. Krämer   +15 more
doaj   +1 more source

Combining UPerNet and ConvNeXt for Contrails Identification to reduce Global Warming [PDF]

arXiv.org, 2023
Semantic segmentation is a critical tool in computer vision, applied in various domains like autonomous driving and medical imaging. This study focuses on aircraft contrail detection in global satellite images to improve contrail models and mitigate ...
Zhenkuan Wang
semanticscholar   +1 more source

Can we successfully avoid persistent contrails by small altitude adjustments of flights in the real world?

Meteorologische Zeitschrift, 2023
This paper describes the first-ever operational contrail avoidance trial in the real world, which took place in the region of Maastricht Upper Area Control (including the northwest of Germany, the Benelux countries and part of the North Sea) in the year ...
R. Sausen, S. Hofer, K. Gierens, L. Bugliaro, R. Ehrmanntraut, Ilona Sitova, Kacper Walczak, Anja Burridge-Diesing, Milena Bowman, Nick Miller   +9 more
semanticscholar   +1 more source

Ground-based observations for the validation of contrails and cirrus detection in satellite imagery [PDF]

Atmospheric Measurement Techniques, 2010
Contrails and additional cirrus clouds caused by air traffic have a potential warming effect due to their optical properties and their location in the upper troposphere.
H. Mannstein, A. Brömser, L. Bugliaro
doaj   +1 more source