Steering Committee
Established scientists within the group, representing the major ITEX nations, serve as its Steering Committee, providing overall program direction and overseeing the international linkages.

Robert Hollister (Chair)
Kari Klanderud (Chair)
Ulf Molau
Philip Wookey
Ingibjörg Jónsdóttir
Steven Oberbauer
Greg Henry

ITEX By-Laws
Read the guidelines (in pdf format) that provide operational procedures for the International Tundra Experiment.

Communicaition among participants is through the group's mailing lists and the ITEX web site. Formerly housed at the Danish Polar Center, the Secretariat functions are currently being performed by Greg Henry's group at the University of British Columbia.

About Us
The International Tundra Experiment is a collaborative effort involving scientists from more than 11 countries, including all the Arctic nations.

ITEX seeks to examine the response of circumpolar cold adapted plant species and tundra ecosytems to environmental change, specifically to an increase in summer temperature. Empirical knowledge based on experiments coupled with available evolutionary history, ecology, and genetics was chosen as the best way to predict species response to climate change.

The ITEX research model combines long-term and short-term experimentation with monitoring and has the elegance and simplicity called for to understand ecosystem response and vulnerability to change. The experiment is designed to examine the effects of temperature change; maximize geographic representation, by minimizing technical and equipment requirements; be long-term; focus primarily on species; and, if resources permit, allow for genetic and system level studies.

Participation may be at several levels of complexity and sophistication depending on interests and available funding support. Each ITEX site operates some form of warming experiment. Most sites use open-top chambers to warm the tundra. These passive chambers affect plant growth and phenological development in a variety of ways.

Each ITEX study site is expected to collect similar data following established protocols provided in the ITEX Manual. Collectively the ITEX network is able to pool its data sets to examine vegetation response at varying levels, for example genetics (from ecotype to functional type), across space (from habitats to ecosystems) and over time.

View our research


ITEX brings together a unique pool of logistic and scientific expertise from around the world. We welcome the opportunity to share our experience and to establish connections with interested individuals and research programs from all branches of the natural sciences and Humanities.

If you're a researcher considering a collaborative project with ITEX, please explore our Research section for a site or experiment that interests you. Then contact the appropriate principal investigator directly to discuss your interest.