Journal Publications

Sullivan PF, Welker JM, Arens SJT, Sveinbjornsson B 2008. Continuous estimates of CO2 efflux from arctic and boreal soils during the snow-covered season in Alaska. Journal of Geophysical Research 113: G04009.

Sullivan PF, Arens SJT, Chimner RA, Welker JM 2008. Temperature and microtopography interact to control carbon cycling in a high arctic fen. Ecosystems 11: 61-76.

Sullivan PF, Welker JM, Steltzer H, Hagedorn B, Sletten RS, Arens SJT, Horwath JL 2008. Energy and water additions give rise to simple responses in plant canopy and soil microclimates of a high arctic ecosystem. Journal of Geophysical Research 113: G03S08.

Arens SJT, Sullivan PF, Welker JM 2008. Nonlinear responses to nitrogen and strong interactions with nitrogen and phosphorus additions drastically alter the structure and function of a high arctic ecosystem. Journal of Geophysical Research 113: G03S09.

Steltzer H, Hufbauer RA, Welker JM, Casalis M, Sullivan PF, Chimner RA 2008. Frequent sexual reproduction and high intraspecific variation in Salix arctica: implications for a terrestrial feedback to climate change in the High Arctic. Journal of Geophysical Research 113: G03S10.

Sullivan PF, Sommerkorn M, Rueth HM, Nadelhoffer KJ, Shaver GR and Welker JM 2007. Climate and species affect fine root production with long-term fertilization in acidic tussock tundra near Toolik Lake, Alaska. Oecologia 153: 643-652.

Sullivan PF and Welker JM 2007. Variation in leaf physiology of Salix arctica within and across ecosystems in the High Arcitc: test of a dual isotope conceptual model. Oecologia 151: 372-386.

Sullivan PF and Welker JM 2005. Warming chambers stimulate early season growth of an arctic sedge: results of a minirhizotron field study. Oecologia 142: 616-626.

Welker JM, Fahnestock JT, Sullivan PF and Chimner RA 2005. Leaf mineral nutrition of arctic plants in response to warming and deeper snow in northern Alaska. Oikos 109: 167-177.