Abstract
On the regional climatic impact of contrails: microphysical and radiative properties of contrails and natural cirrus clouds
Highlights
Air trac inuences the atmosphere through the emission of various gases and particles
They showed that a signi®cant climatic eect is more likely to occur on the basis of contrail cloud cover rather than on the basis of additional water vapour due to air trac
This is done by use of a one-dimensional radiative convective model (RCM), originally developed by Liou and Ou (1983) and modi®ed to allow modelling of regional climate by taking into account advection as a third energyux besides radiation and convection
Summary
Air trac inuences the atmosphere through the emission of various gases and particles. Liou et al (1990) studied the global inuence of contrails within a case-study, using a two-dimensional climate model They found an increase in surface temperature of 1 K in the case of an increase in cloud cover by 5% between 20 and 70N. Ponater et al (1996) studied the inuence of an increase in water vapour and in cirrus cloud cover induced by air trac using a three-dimensional GCM. A case-study is carried out within this paper for an area of increased air trac in southern Germany This is done by use of a one-dimensional radiative convective model (RCM), originally developed by Liou and Ou (1983) and modi®ed to allow modelling of regional climate by taking into account advection as a third energyux besides radiation and convection.
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