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Proceedings Paper

Quantitative assessment of contrail cloud cover
Author(s): Klaus Peter Schickel; T. Forkert; H. Mannstein; B. Strauss; P. Wendling
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Paper Abstract

Contrails are produced by airtraffic and thereby form an anthropogenic component of cloudiness. They typically appear in height levels between approximately 6km and 12km. Their temperature is typically between -40°C and -60°C. Due to these low temperatures their greenhouse effect is potentially high and the question arises to which extent they influence the climate (U. Schumann et a!., 1 994). A prerequisite for an estimation of this climatic influence is a knowledge of the cloud cover which is due to contrails. Our study presents two methods of determining contrail cloud cover using NOAA-AVHRR satellite data. The temperature difference image between channels 4 and 5 at 1 1 .tm and I 2tm enhances the appearence of high level thin clouds and is therefore used as a basis of the analysis. The first method is 'manually', the second by application of an automated detection. Both methods are applied on a scene over Central Europe and compared to each other. Chapter 2 describes the manual analysis and its results, chapter 3 the automated method and its limitations which exist up to now and chapter 4 shows the comparison of the two methods.

Paper Details

Date Published: 23 December 1994
PDF: 6 pages
Proc. SPIE 2309, Passive Infrared Remote Sensing of Clouds and the Atmosphere II, (23 December 1994); doi: 10.1117/12.196694
Show Author Affiliations
Klaus Peter Schickel, DLR (Germany)
T. Forkert, DLR (Germany)
H. Mannstein, DLR (Germany)
B. Strauss, DLR (Germany)
P. Wendling, DLR (Germany)

Published in SPIE Proceedings Vol. 2309:
Passive Infrared Remote Sensing of Clouds and the Atmosphere II
David K. Lynch, Editor(s)

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