International Arctic Systems for Observing the Atmosphere (IASOA) IPY Press release – Feb. 10, 2009, Boulder, CO Download IASOA Press Release as PDF For more information visit our IPY Media Day page at www.iasoa.org Climate observatories at Barrow, Alaska, Summit, Greenland, and Tiksi, Russia all lie between 71° and 73° North, a few hundred miles above the Arctic Circle—but the sites are hardly similar otherwise. A...

Circumpolar treeline research by the IPY core project PPS Arctic Fieldwork in Northern Norway: recording and mapping stand density, tree recruitment and age structure of Scots pine stand close to treeline. Photo: A. Hofgaard Are trees invading the Arctic? The ‘expected’ answer to this question is ‘Yes’: but is this really true? The expectation is based on some rather simple models that relate the position of the treeline to the local climate. In its simplest form, the idea is that it is too cold for trees to exist north of the present-day treeline, so a warming climate ought to p...

EBA is a complex interdisciplinary project involving over 40 research groups from approximately 22 nations, as well as links to the Arctic research community. Its work crosses traditional disciplinary divides within biology, in particular working across the marine and terrestrial realms. EBA has multiple aims reflected in its structure of 5 work packages. At a broad scale, these packages are aimed at understanding how the various ecosystems of Antarctica are structured and function, what historical processes have shaped them to be as they are now, what evolutionary processes have taken place in the Antarctic environment and, in turn, what that tells us about the environment itself. Finally, in the context of parts of Antarctica currently facing the fastest rates of environmental change on ...

MEDIA ADVISORY UPCOMING RELEASE OF NEW EVIDENCE ABOUT CHANGE IN THE POLAR REGIONS download in multiple languages: Arabic