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This file provides additional information for the authors' XP2022 submission.

The International Polar Year 2007““2008 will be the largest internationally coordinated research programme in 50 years. It will be an intensive period of interdisciplinary science focused on the Arctic and the Antarctic. IPY 2007““2008 research activities were assembled from the ideas of researchers in more than 60 countries. A total of 228 projects have been endorsed by the ICSU/WMO Joint Committee for IPY 2007““2008. These projects have a strong interdisciplinary emphasis and address the six themes as well as education and outreach objectives. IPY projects will exploit new technological and logistical capabilities and strengthen international coordination of research. They aim to attract, engage and develop a new generation of researchers and raise the awareness, interest and understanding of polar residents, educators, students, the general public and decision makers worldwide. IPY projects will collect a broad-ranging set of samples, data and information which will be made available to an unprecedented degree. IPY 2007““2008 aims to leave a legacy of enhanced observational systems, facilities and infrastructure. The observational networks to be established during IPY include integrated ocean observing systems in both the Arctic and Southern Oceans, coordinated acquisition of satellite data products from multiple space agencies and observational systems for astronomy, sun““earth physics, atmospheric chemistry, meteorology, ecosystems, permafrost, glaciers and geophysics. Many observing systems within IPY will be developed within the framework of existing international global observing systems.

The polar regions are integral components of the Earth system. As the heat sinks of the climate system they both respond to and drive changes elsewhere on the planet. Within them lie frontiers of knowledge as well as unique vantage points for science. Yet because of their remoteness and harsh nature, the poles remain insufficiently studied. With recent technological advances providing new scientific possibilities, and humankind‘s need for environmental knowledge and understanding ever increasing, the time is ripe for a coordinated international initiative to achieve a major advance in polar science. For this reason, the International Council for Science (ICSU) decided to take the lead in organizing an International Polar Year (IPY) in 2007-2008. They did so by establishing an IPY Planning Group (PG) charged with developing the IPY 2007-2008 science plan and implementation strategy. This report is the outcome of the PG‘s work. It is based on input from individuals, from over 40 governmental and nongovernmental organizations that have endorsed or expressed support for IPY 2007-2008, and from the 32 IPY National Committees or National Points of Contact established so far. It is also results from discussions and debate at over a dozen international meetings covering the gamut of science disciplines, from a series of "town" meetings, and from two Discussion Forums hosted by ICSU and attended by representatives of the IPY National Committees and a variety of interested polar organizations.

The International Association of Cryospheric Sciences (IACS) became the eighth and most recent association of IUGG at the general assembly in Perugia, Italy, in July 2007. IACS was launched in recognition of the importance of the cryosphere within the Earth system, particularly at a time of significant global change. It was the first new association of the union to be formed in over 80 years and IACS celebrated its 10th anniversary only a year before the IUGG centennial. The forbearers of IACS, however, stretch back even further than IUGG, starting with the formation of the Commission Internationale des Glaciers (CIG) by the International Geological Congress in 1894. Here we record the history of the transition from CIG to IACS, the scientific objectives that drove activities and changes, and some of the key events and individuals involved.