You need JavaScript to view this

In situ observations of contrail micro-physics and implications for their radiative impact

Abstract

Increasing levels of air traffic have raised concerns about the potential effects of aircraft exhaust on the climate. Current knowledge is expanded by examining in situ data from 21 contrails sampled at altitudes of 9.3 - 12.5 km and temperatures of -47 deg C to -66 deg C. The airborne equipment allowed measurements of particles as small as 2 {mu}m in diameter, which have not previously been reported. The microphysical characteristics of the contrails, which occurred in both clear and cloudy air, are presented and compared with natural cirrus properties. Computations of the wavelength-dependent radiative properties of the sampled particle distributions are also presented and compared with laboratory measurements. Finally, implications of these findings for climatic assessment are discussed. (R.P.) 9 refs.
Authors:
Poellot, M R; [1]  Arnott, W P; Hallett, J [2] 
  1. North Dakota Univ., Grand Forks, ND (United States)
  2. Nevada Univ., Reno, NV (United States). Desert Research Inst.
Publication Date:
Dec 31, 1997
Product Type:
Conference
Report Number:
ONERA-97-Vol.1; CONF-9610234-
Reference Number:
SCA: 540110; 540150; PA: FRC-98:000150; EDB-98:075813; SN: 98001913139
Resource Relation:
Conference: International colloquium: Impact of aircraft emissions upon the atmosphere, Paris (France), 15-18 Oct 1996; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of impact of aircraft emissions upon the atmosphere. V. 1; PB: [381] p.
Subject:
54 ENVIRONMENTAL SCIENCES; AIRCRAFT; EXHAUST GASES; CLIMATIC CHANGE; PARTICLE SIZE; CONDENSATES; CLOUDS; EARTH ATMOSPHERE; SOLAR RADIATION
OSTI ID:
623626
Research Organizations:
Office National d`Etudes et de Recherches Aerospatiales (ONERA), 92 - Chatillon (France)
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE98731902; TRN: FR9800150
Availability:
OSTI as DE98731902
Submitting Site:
FR
Size:
pp. 361-366
Announcement Date:

Citation Formats

Poellot, M R, Arnott, W P, and Hallett, J. In situ observations of contrail micro-physics and implications for their radiative impact. France: N. p., 1997. Web.
Poellot, M R, Arnott, W P, & Hallett, J. In situ observations of contrail micro-physics and implications for their radiative impact. France.
Poellot, M R, Arnott, W P, and Hallett, J. 1997. "In situ observations of contrail micro-physics and implications for their radiative impact." France.
@misc{etde_623626,
title = {In situ observations of contrail micro-physics and implications for their radiative impact}
author = {Poellot, M R, Arnott, W P, and Hallett, J}
abstractNote = {Increasing levels of air traffic have raised concerns about the potential effects of aircraft exhaust on the climate. Current knowledge is expanded by examining in situ data from 21 contrails sampled at altitudes of 9.3 - 12.5 km and temperatures of -47 deg C to -66 deg C. The airborne equipment allowed measurements of particles as small as 2 {mu}m in diameter, which have not previously been reported. The microphysical characteristics of the contrails, which occurred in both clear and cloudy air, are presented and compared with natural cirrus properties. Computations of the wavelength-dependent radiative properties of the sampled particle distributions are also presented and compared with laboratory measurements. Finally, implications of these findings for climatic assessment are discussed. (R.P.) 9 refs.}
place = {France}
year = {1997}
month = {Dec}
}