International Center for climate and Environment Sciences (ICCES) was founded in 1991. It was selected as the representative center of China to join the network of Centre of Excellence of Commission on Science and Technology for Sustainable Development in the South (COMSATS) ,and one of the centers of Third World Network of Scientific Organizations (TWNSO). It became CAS-TWAS Centre of Excellence for Climate and Environment Sciences in 2013.

ICCES focuses its research on key scientific problems related with global climate and environmental changes. The main research fields include development of Dynamical Earth System Model and numerical simulation, meteorological and environmental forecast and related disaster assessment theory and technique, data assimilation theory and methodology, and earth system
theory and natural cybernetics.

ICCES is devoted to becoming an international renowned research center on global climate and environmental sciences, as well as a cooperative base providing technology support, capacity building and talent training for developing countries, to take the lead in initiating, organizing, coordinating and implementing major international scientific cooperation between CAS and other developing countries. Besides, ICCES also holds the secretariat of CAS-TWAS-WMO Forum (CTWF) on Climate Science since 2000, and annually organizes international symposiums and training workshops.