Noordijk H ,
Diederen HSMA ,
Woerd HJ van der ,
Velze K van
English Abstract environmental indices will be an important tool in
future environmental assessments (milieubalansen en Milieuverkenningen).
This report defines the indices for the atmosphere. It describes the state
of definition at the start of the year 1994, and it is the result of the
project group in the Laboratory of Air Research (LLO) of RIVM, with support
of some experts within and outside of RIVM. This definition needs to be
discussed by all the parties involved with environmental assessments, in
order to improve the definition and to obtain consensus on it. This report
serves as a basis for these discussions. The indices are clustered in human
exposure, ecosystem exposure, depletion of stratospheric ozone, climatic
change, decreasing self-cleaning capability of the atmosphere, and the
damage to the cultural inheritance and the economy. The clusters on human
and ecosystem exposure are subdivided into exposure to higher concentrations
over a short time (smog), and exposure to concentrations averaged over a
time-scale of seasons. Exposure of humans in the indoor environment is also
treated separately. The indices are based on several tens of compounds.
Concentrations are in general related to internationally accepted "no-effect
levels" or "critical levels".