This session will present research results from warming and global change experiments. To develop predictive understanding of climate warming impacts on terrestrial ecosystems, many warming experiments have been conducted in the past two decades and in a variety of ecosystems. The longest field study, addressing soil warming at Harvard Forest, has been ongoing since 1991. The Network of Ecosystem Warming Studies (NEWS) organized by the international consortium, Terrestrial Ecosystem Response to Atmospheric and Climate Change (TERACC) includes at least 35 experimental sites. Stimulated by new funding opportunities, more warming experiments with other climate change factors have recently been initiated. As the ongoing warming experiments continue and new multi-factor experiments have been established, many experimental results are available to examine effects of warming and other factors on ecosystem function and community structure across a wide spectrum of time and space scales. In addition, modeling studies actively examine the complexity of ecosystem responses to climate change. Presentations on these topics by representatives of research groups working in diverse ecosystems are brought together here to foster synergistic interaction among researchers using warming experiments in climate change research. Studies reported here have used warming experiments alone or in combination with modification of other climate factors (such as elevated CO₂, altered precipitation, and/or increased N inputs), or have used modeling to integrate experimental studies of global change impacts on ecosystems.