Welcome

  • Lara M. J., Andresen C. G., Lin D. H., Lougheed, V. L., Tweedie, C. E. (2019). Response of tundra wetlands to Arctic change; a positive feedback to warming?. Journal of Geophysical Research Biogeosciences.
  • Andresen C. G., Tweedie C. E., Lougheed V. L. (2018). Climate and nutrients effects on Arctic aquatic plant phenology using phenocams. Remote Sensing of Environment. Doi: 10.1016/j.rse.2017.11.013
  • Andresen C. G. Lara M. J., Tweedie, C. E., Lougheed, V. L. (2017). Rising Plant-mediated Methane Emissions from Arctic Wetlands. Global Change Biology. doi: 10.1111/gcb.13469.

                   Featured in: EOS magazine (https://eos.org/articles/aquatic-plants-may-accelerate-arctic-methane-emissions)

  • Muster, S., Roth, K., Langer, M., Lange, S., Cresto, F., Bartsch, A., Morgenstern, A., Grosse, G., Andresen, C. G., Jones, B., Sannel, A. B. K., Sjöberg, Y., Günther, F., Veremeeva, A., Lindgren, P. R., Bouchard, F., Lara, M. J., Fortier, D., Charbonneau, S., Virtanen, T. A., Hugelius, G., Palmtag, J., Siewert, M. B., Riley, W. J., Koven, C. D., and Boike, J. (2017). PeRL : A Circum-Arctic Permafrost Region Pond and Lake Database. Earth Syst. Sci. Data Discuss., doi:10.5194/essd-2016-56.
  • Lara, M. J., Johnson D. R., Villarreal, S., Andresen C. G., Tweedie C.E. (2017). Peak season carbon exchange shifts from a sink to a source following 50+ years of herbivore exclusion in an Arctic tundra ecosystem. Ecology 105, 122–131 Journal of Ecology 2017, 105, 122–131 doi: 10.1111/1365-2745.12654
  • Andresen C. G. and Lougheed, V. L. (2015). Disappearing Arctic tundra ponds: Long‐term (1948‐2013) fine‐scale analysis of surface hydrology in drained thaw lake basins over a 65 year period (1948-2013). Journal of Geophysical Research Biogeosciences. doi: 10.1002/2014JG002778.    

                        Featured in: Science Magazine News (http://www.sciencemag.org/news/2015/03/alaska-s-ponds-are-disappearing)                                                                         AGU News (http://news.agu.org/press-release/ponds-are-disappearing-in-the-arctic-new-study-finds/)                                                                                                UTEP News (http://news.utep.edu/researcher-studies-how-climate-change-is-affecting-arctic-ponds/)

  • Lougheed V. L., Hernandez, C., Andresen C. G., Miller, N. A., Alexander, V., Prentki, R. (2015) Contrasting responses of phytoplankton and benthic algae to recent nutrient enrichment in Arctic tundra ponds. Freshwater Biology. 60:10, 2169-2186.
  • Andresen C. G. Vargas S. A., Lougheed, V. L., Tweedie, C. E. (2014) Kite-based Aerial Photography: A low cost, effective tool for wetland research. Wetland Science and Practice 32:15-19
  • Lin D. H., Johnson, D. R., Andresen C. G., Tweedie C.E. (2012) High-spatial resolution decade-time scale land cover change at multiple locations in the Beringian Arctic (1948 – 2000s). Environmental Research Letters 7 025502.

In review & in prep.

  • Andresen C. G., Lawrence, D. M., Wilson, C. J., McGuire, A.D., Jafarov, E., Schaefer, K., Chen, G., Hayes, D., Zhang, W,. Chen, X., Gouttevin, I., Burke, E., Chadburn, S., Ji, D., Koven, C. (in review). Wetter or drier? Large uncertainty in permafrost hydrology projections. Environmental Research Letter.
  • Arendt, C. A., Heikoop J.M., Newman B.D., Wilson C. J., Wainwright H., Kumar J., Cherry J., Andresen C. G., Oktem R., Perkins G., Wales N., and Wullschleger S. D.  (in prep). Landscape evolution feedbacks from permafrost degradation: increased nitrate in the Arctic. Nature Letters
  • Vargas, S.A., Andresen, C.G., Melendez, M., Cody, R.P., Oberbauer, S.F., Wilson, C. J., Tweedie, C. E. (in prep). Capturing microtopographic variability in the Arctic tundra landscape: A comparison of multiple remote sensing platforms. ISPRS Journal of Photogrametry and Remote Sensing.
  • Lougheed V. L., Andresen C. G., Miller N. A., Tweedie C. E. (in prep). The substantial contribution of small aquatic ecosystems to landscape carbon flux in the Arctic. Global Biochemical Cycles.

Selected Publications

Christian G. Andresen

I am a environmental scientist and remote sensing specialist interested in the understanding of Arctic hydrology, ecology and associated land-atmosphere carbon dynamics under the effects of climate change. This includes (but not limited to) the evolution of surface hydrology under climate change, interactions with biogeochemical processes and how these relationships influence higher-level environmental patterns and processes. My research is highly inter-disciplinary and combines rigorous, process-based approaches from different fields including hydrology, biogeochemistry, ecology and geomorphology. I use a combination of in-situ sampling methods, multi-scale remote sensing and earth system models to pinpoint and evaluate the mechanistic links between climate, hydrology and carbon exchange in the Arctic.





research interests 

Coupled to my aforementioned work, I have been developing and testing novel platforms and remote sensing capabilities including phenocams, kite aerial photography and Unmanned Aerial Systems (UAS, aka Drones) equipped with LiDAR, hyperspectral imaging and photogrammetry with applications to a gamut of environmental studies and national security solicitations. These applications have been the technological backbone for my research and I envision continuing the development and testing of novel systems for environmental applications.