To keep informed of, and review scientific developments in, the fields of environmental pollution and atmospheric chemistry, including the interrelationships between changes in atmospheric composition, global and regional climate and other aspects of the Earth system, and disturbances to the natural cycles of chemical species in the atmosphere/ocean/biosphere system;

(i) Long-term globally integrated observations of atmospheric composition and air pollution, including greenhouse gases, ozone, ultraviolet (UV) radiation, reactive gases, aerosols and precipitation chemistry;

(ii) The high quality, timeliness and continuity of data from the monitoring network including aircraft and satellite and the development of a functional system for real-time or quasireal- time measurements;

(iii) The transport, transformation and deposition of air pollutants on all space scales and timescales;

(iv) User-friendly access to the data and the application of data for analysis, assimilation and assessments pertaining to the existing and emerging environmental issues both of global and regional importance;

(v) The development of air pollution, weather and climate predictive capability, including inverse modelling for source estimation;

(vi) The management of urban air quality;

To maintain a strategic implementation plan for the GAW programme, taking into account the Integrated Global Atmospheric Chemistry Observations (IGACO) strategy;

To cooperate with other relevant programmes and organizations inside and outside WMO, namely:

(i) To liaise and communicate with the Global Earth Observation System of Systems (GEOSS), the Committee on Earth Observation Satellites (CEOS) and the Integrated Global Observing Strategy (IGOS);

(ii) To collaborate with the CAS OPAG-WWRP, particularly with ET-WM, CBS working groups and other WMO technical commissions;

(iii) To review and assess the SEA component of OPAG-EPAC and contribute to other WMO SEA-related activities;

(f) To support international conventions.