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The Environmental Pollution and Atmospheric Chemistry Scientific Steering Committee (EPAC SSC)

EPAC SSC terms of reference (CAS-16, doc.10).

The Environmental Pollution and Atmospheric Chemistry Scientific Steering Committee (EPAC SSC) consisting of leading experts tasked to assist, guide and advise the Commission activities related to environmental pollution and atmospheric chemistry and the Global Atmosphere Watch (GAW) Programme, with ToR as described in Annex 2 to Resolution 2 (CAS-16):

(a) To keep informed of 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;
(b) To advise CAS and recommend actions that WMO should take to promote, initiate, facilitate or set priorities for:

(i) Long-term globally integrated observations of atmospheric composition and related physical parameters, 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 satellites;

(iii) A system for real-time or near real-time data delivery and exchange;

(iv) User-friendly access to data and the application of data for analysis, satellite and model validation, assimilation and environmental assessments;

(v) Research on transport, transformation, deposition and sources and sinks of atmospheric constituents on all space- and timescales using observational and modelling tools;

(vi) The development of modelling tools, including predictive capability, for support of atmospheric environment research;

(vi) Research on urban air quality;
(vii) Development of products and services in the area of atmospheric chemistry taking into consideration socio-economical needs;

(c) To contribute to the development of and to review the science and implementation plan for the GAW Programme;
(d) To facilitate cooperation with other relevant programmes and organizations inside and outside WMO, including GFCS, WIGOS/WIS, GCOS, GEO, satellite initiatives, WWRP, and WCRP and other WMO technical commissions, bodies and Programmes;
(e) To promote CAS activities in support of international conventions.

Membership of the Environmental Pollution and Atmospheric Chemistry Scientific Steering Committee (EPAC SSC) :

(a) The Chair of the EPAC SSC is appointed by CAS during its session. In the event that a Chair of the EPAC SSC has to be appointed in the intersessional period, the appointment is made by the president of CAS in consultation with the CAS Management Group. The EPAC SSC Chair is appointed for four years with the possibility of renewal of maximum another four years;

(b) The EPAC SSC shall consist of up to ten scientists selected for their scientific expertise, capacity and breadth of vision. The EPAC SSC members should be drawn to promote geographical and thematic representation and gender balance. The members are appointed by the CAS president in consultation with the CAS Management Group, upon the EPAC SSC Chair’s proposal, prepared in consultation with the Secretariat. The initial term of the EPAC SSC members is four years and can be renewed for a maximum of another four years. For the sake of continuity, members are reviewed and appointed in a staggered fashion every two years. The EPAC SSC includes as ex-officio members the chairs of GAW Scientific Advisory Groups and Expert Teams and major Projects. Observers may be invited to attend as required.

EPAC SSC Members






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