Results 21 to 30 of about 480 (177)
Influence of Different Altitudes on the Solid Rocket Contrail Formation in the Near Field
International Journal of Aerospace Engineering, 2023 Detecting the infrared characteristics of the contrails is a reasonable approach to tracing the rocket, and the particle properties of the contrails are the basis of the infrared analysis.
Peigao Zeng +4 more
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On contrail climate sensitivity [PDF]
Geophysical Research Letters, 2005 In equilibrium climate change simulations with a global climate model we estimate the climate sensitivity parameter to contrail cirrus to be 0.43 K/(Wm−2), only about 60% of the corresponding value for a CO2 forcing. The spatial pattern of the surface temperature response is much smoother than the forcing pattern of contrails with little correlation ...
Ponater, M. +3 more
openaire +2 more sources
Contrails and their impact on shortwave radiation and photovoltaic power production – a regional model study [PDF]
Atmospheric Chemistry and Physics, 2018 A high-resolution regional-scale numerical model was extended by a parameterization that allows for both the generation and the life cycle of contrails and contrail cirrus to be calculated. The life cycle of contrails and contrail cirrus is described
S. Gruber +6 more
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The climate impact of COVID-19-induced contrail changes [PDF]
Atmospheric Chemistry and Physics, 2021 The COVID-19 pandemic caused significant economic disruption in 2020 and severely impacted air traffic. We use a state-of-the-art Earth system model and ensembles of tightly constrained simulations to evaluate the effect of the reductions in aviation ...
A. Gettelman, C.-C. Chen, C. G. Bardeen
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Aerospace, 2020 Formation flight is one potential measure to increase the efficiency of aviation. Flying in the upwash region of an aircraft’s wake vortex field is aerodynamically advantageous. It saves fuel and concomitantly reduces the carbon foot print.
Simon Unterstrasser
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A methodology for in-situ and remote sensing of microphysical and radiative properties of contrails as they evolve into cirrus [PDF]
Atmospheric Chemistry and Physics, 2012 Contrails and especially their evolution into cirrus-like clouds are thought to have very important effects on local and global radiation budgets, though are generally not well represented in global climate models.
H. M. Jones +13 more
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An upgraded estimate of the radiative forcing of cryoplane contrails
Meteorologische Zeitschrift, 2005 The radiative forcing of contrails is quantified for a hypothetical fleet of cryoplanes in comparison with a conventional aircraft fleet. The differences in bulk optical properties between conventional and cryoplane contrails are determined by numerical ...
Susanne Marquart +3 more
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Radiative forcing by contrails [PDF]
Annales Geophysicae, 1999 Abstract. A parametric study of the instantaneous radiative impact of contrails is presented using three different radiative transfer models for a series of model atmospheres and cloud parameters. Contrails are treated as geometrically and optically thin plane parallel homogeneous cirrus layers in a static atmosphere. The ice water content is varied as
R. Meerkötter +6 more
openaire +6 more sources
Statistical analysis of contrail lifetimes from a satellite perspective
Meteorologische Zeitschrift, 2018 The study of the lifetimes of contrails from a satellite perspective benefits from the extended coverage and close temporal monitoring. However, the initial stages of the contrail development are not observed from a satellite platform due to the sub ...
Klaus Gierens +1 more
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Reanalysis-driven simulations may overestimate persistent contrail formation by 100%–250%
Environmental Research Letters, 2022 Model-based estimates of aviation’s climate impacts have found that contrails contribute 36%–81% of aviation’s instantaneous radiative forcing. These estimates depend on the accuracy of meteorological data provided by reanalyses like ECMWF Reanalysis 5th
Akshat Agarwal +4 more
doaj +1 more source