FLYKLIM: aircraft emissions, contrails and clouds in a regional climate model

Details FLYKLIM: aircraft emissions, contrails and clouds in a regional climate model FLYKLIM: aircraft emissions, contrails and clouds in a regional climate model

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....9030w&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #9030

Physics

Scientific paper

The IPCC report about aviation and the global atmosphere emphasised the rather large uncertainty about a possible climate forcing caused by airtraffic. In addition to the general uncertainty about the processes that link aircraft emission with climate parameters such as clouds, large regional differences due to the regional variation of airtraffic density are also expected. The FLYKLIM research project tries to assess the impact from airtraffic on cloudiness and climate on regional scales with a focus on southern Sweden. We have implemented both contrails and the change in the background ice nuclei concentration in airtraffic corridors in the mesoscale model MM5. Both the direct and the indirect effect lead to a change in the number of ice crystals that subsequently alter the radiative and microphysical properties of high-clouds. We test the hypothesis that this change in high-level cloudiness is able to significantly alter the planetary albedo and ultimately the climate on regional scales. By varying the amount of emitted aerosol particles we can simulate future situations with an increased number of airplanes and test the susceptibility of the regional climate to an expected increase in airtraffic.

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