In Situ Observations of Ice Particle Losses in a Young Persistent Contrail
| Autor: | Christiane Voigt, J. Kleine, Bruce E. Anderson, Tina Jurkat-Witschas, Daniel Sauer, Monika Scheibe, Bernd Kärcher, Stefan H. E. Kaufmann, Hans Schlager |
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| Rok vydání: | 2018 |
| Předmět: |
In situ
010504 meteorology & atmospheric sciences Particle number contrails ice Atmosphärische Spurenstoffe 010501 environmental sciences in-situ measurements medicine.disease_cause Atmospheric sciences soot 01 natural sciences Soot Vortex Geophysics Climate impact medicine vortex Phase General Earth and Planetary Sciences Environmental science Sublimation (phase transition) Cirrus Wolkenphysik Soot particles 0105 earth and related environmental sciences |
| Zdroj: | Geophysical Research Letters. 45 |
| ISSN: | 1944-8007 0094-8276 |
| Popis: | We describe results of in situ observations of a 1 to 2-min old contrail in the vortex Phase generated from soot-rich exhaust (> 10^15 emitted soot particles per kg-fuel burned). Simultaneous measurements of soot (EIsoot) and apparent ice (AEIice) particle number emission indices show a pronounced anti-correlation in the vertical contrail profile. AEIice decrease by about 75% with increasing distance below the contrail-producing aircraft,while EIsoot increase by an equivalent relative fraction, therefore strongly suggesting sublimation causing the ice particle losses. Quantifying these losses in measurements helps to validate and improve contrail parameterizations used to estimate the climate Impact of contrails and contrail cirrus. |
| Databáze: | OpenAIRE |
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