| Fig. 1-1 | Atmospheric 
          science spaceborne instruments and missions since 1970 with relevance 
          for SCIAMACHY. The list of missions is not intended to be complete but 
          to illustrate the progress in spaceborne instrumentation for atmospheric 
          composition monitoring. (graphics: DLR-IMF) |   | 
      
      | Fig. 1-2 | Atmospheric 
          pressure and temperature profiles for mid latitudes (US Standard Atmosphere). 
           |   | 
      
      | Fig. 1-3 | Interactions 
          between human activity, atmospheric composition, chemical and physical 
          processes and climate. (graphics: DLR-IMF, after WMO-IGACO 2004) 
           |   | 
      
      | Fig. 1-4 | The 
          dominant physical and chemical processes determining the composition 
          of the troposphere. (graphics: WMOIGACO 2004)  |   | 
      
      | Fig. 1-5 | Schematic 
          sketch of the interactions between stratospheric ozone and other atmospheric 
          constituents and processes. Anthropogenic emissions are shown in green 
          while other factors affecting the climate system (e.g., volcanoes) are 
          shown in beige. Red arrows indicate where one species or process affects 
          another. Feedbacks are shown with bold purple lines. For example, decreasing 
          polar stratospheric temperatures increase ozone depletion. Reduced ozone 
          then causes stratospheric cooling, creating a positive feedback. (graphics 
          after: NIWA)  |   | 
      
      | Fig. 1-6 | Global, 
          annual mean radiative forcings (Wm-2) due to a number of agents for 
          the period from pre-industrial (1750) to present (late 1990s; about 
          2000). The height of each box denotes a central or best estimate value 
          while its absence indicates that no best estimate is possible. The vertical 
          bars visualise an estimate of the uncertainty range, for the most part 
          guided by the spread in the published values of the forcing. The uncertainty 
          range specified here has no statistical basis and therefore differs 
          from the use of the term elsewhere in this document. A ‘level of scientific 
          understanding’ index is associated to each forcing, with high, medium, 
          low and very low levels, respectively. (IPCC 2001)  |   |