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Summary and R ecommendations: Upper Atmosphere Chairs: G. De Leeuw , J. Orphal

Summary and R ecommendations: Upper Atmosphere Chairs: G. De Leeuw , J. Orphal. Highlights

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Summary and R ecommendations: Upper Atmosphere Chairs: G. De Leeuw , J. Orphal

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  1. Summary and Recommendations: Upper AtmosphereChairs: G. De Leeuw, J. Orphal Highlights • The session included several talks on MIPAS showing its solid and unique contribution to manifest the strong coupling between the different atmospheric regions, from the troposphere to the thermosphere. This has been shown in the two directions: bottom-up effects, e.g the effects of the stratospheric-warmings on the upper atmosphere and top-down: the effects of the Energetic Particle Precipitation (EPP) on the stratospheric composition. • Interaction of solar UV and UA was also highlighted by using GOMOS and SCIAMACHY data. Recommendations • Explore the data measured in the mesosphere and above by generating climatologies(by combining different instruments). • To distinguish the natural vs anthropogenic effects in these atmospheric regions is certainly a major challenge for the future (links to climate change?). • There is a clear need for a continuation of limb measurements covering the stratosphere and mesosphere (we only have the measurement of only one incomplete solar cycle to study EPP effects, there is a gap on NOx observations after Envisat) • Better interaction with models requires 2-D data retrieval • There is a clear need for data reanalysis

  2. Summary and Recommendations: GreenHouseGases (GHGs)Chairs: G. De Leeuw, J. Orphal Highlights • Data products derived from SCIAMACHY, GOSAT, and IASI measurements are maturing and can provide trends when properly handled Recommendations • Exploit further the 10 year ENVISAT data for model development and evaluation leading to a better understanding of the global carbon cycleand providing answers to open science questions like GHGs emissions and climate change • In addition to trends and total columns, information is needed on the vertical distribution and diurnal variations of GHGs • GHG retrievals need still to be improved (e.g. aerosol effects) • Synergy between different instruments should be more exploited as it provides added value (e.g. uncertainties, gap filling, day/night time coverage) • Built a strategic capability on the continuation of GHG measurements in Europe and worlwide (e.g. constellation of several satellites as provided by different space agencies) • Use for example methane images over the poles for political impact

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