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발표자 Dr.Ulrich Schumann
소속 German Aerospace Center(DLR)
제목 [지환부]SEES_COLLOQUIUM(2020.10.28)-Dr.Ulrich Schumann(DLR)
문의처 02-880-6497
자료 1028 Dr.Ulrich Schumann.pdf [386532 byte] 자료 다운로드
시간 2020-10-28 12:00~13:00
장소 비대면 강의진행

Title : Contrail cirrus modeling, ongoing validation, and remarks on vertical air motions  


Abstract : Contrails form behind aircraft from water vapor and soot engine emissions in sufficiently cold air and may persist for hours in ice supersaturated air masses. Contrail cirrus impacts the radiative budget of the Earth atmosphere system with positive longwave and negative shortwave radiative forcing (RF) contributions depending on sunshine, weather and aircraft routing. Aviation induced contrail cirrus may impact climate to a degree comparable to that of past aviation CO2 emissions. Aviation climate impact may be reduced by proper route selection leading to minimum energy forcing (time and space integrated RF). Here we describe the Contrail Cirrus Prediction model CoCiP which simulates the lifecycle of contrails and computes the time and space integrated RF for given weather and traffic information. The model results compare favorably with a wide set of in situ and remote sensing observation. The method has been applied to study various mitigation strategies (Teoh et al., 2020). In order to determine the total aviation induced shortwave and longwave RF, we started comparing model and satellite data for the periods with high and low traffic before after COVID 19. The formation of ice supersaturated airmasses requires vertical lifting motions. As an aside, a recent study (Schumann, 2019) on relating mesoscale vertical motions in the upper troposphere and lower stratosphere to horizontal divergent motions will be mentioned.

비고 [줌 URL] https://snu-ac-kr.zoom.us/j/81305801642
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