GC026:
Drivers and Implications of Recent Changes in Arctic Greening and Browning





Session ID#: 25352

Session Description:
Remote sensing observations of the Arctic show recent and complex changes in tundra vegetation. For many decades a trend toward greener vegetation (‘Arctic greening’) was observed across the circumpolar region. Recently however, greater variability in the extent of greening has been seen and decreases in vegetation (‘Arctic browning’) have been observed in some regions in some years. The drivers of this increased variability in greening versus browning among years and across the landscape is currently poorly understood. Expansive changes in tundra vegetation could have strong implications for the surface energy balance and climate change in the Arctic, as well as impacts on permafrost thaw, carbon cycling, hydrological processes, vegetation composition, and biota. This session solicits abstracts on the underlying drivers and the potential impacts of Arctic greening and browning, and abstracts that discuss the research needed to continue to advance our scientific understanding of this topic.
Primary Convener:  April M Melvin, National Academy of Sciences, Polar Research Board, Washington, DC, United States
Conveners:  Larry D Hinzman, University of Alaska Fairbanks, Fairbanks, AK, United States, Howard E Epstein, University of Virginia, Charlottesville, VA, United States and Natalie Boelman, Lamont-Doherty Earth Observ., Palisades, DC, United States

Cross-Listed:
  • B - Biogeosciences
  • C - Cryosphere
Index Terms:

Abstracts Submitted to this Session:

Uma Suren Bhatt1, Donald A Walker1, Martha K Raynolds1 and Howard E Epstein2, (1)University of Alaska Fairbanks, Fairbanks, AK, United States, (2)University of Virginia, Charlottesville, VA, United States
Dongjie Fu1, Fenzhen Su1 and Juan Wang2, (1)IGSNRR Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, China, (2)Beijing Union University, Beijing, China
Gareth K Phoenix1, Rachael Treharne2, Lisa Emberson3, Hans A Tømmervik4 and Jarle W Bjerke4, (1)University of Sheffield, Sheffield, S10, United Kingdom, (2)University of Sheffield, Sheffield, United Kingdom, (3)University of York, Stockholm Environment Institute, York, United Kingdom, (4)Norwegian Institute for Nature Research, Tromsø, Norway
Howard E Epstein1, Uma Suren Bhatt2, Donald A Walker3, Martha K Raynolds3 and Xi Yang4, (1)University of Virginia, Charlottesville, VA, United States, (2)Univ Alaska, Fairbanks, AK, United States, (3)University of Alaska Fairbanks, Fairbanks, AK, United States, (4)University of Virginia, Charlottesville, United States
Alexander J Winkler, Max Planck Institute for Meteorology, Hamburg, Germany, Victor Brovkin, Max-Planck-Institut für Meteorologie, Hamburg, Germany, Ranga Myneni, Boston University, Earth and Environment, Boston, MA, United States and Georgii Alexandrov, A.M.Obukhov Institute of Atmospheric Physics RAS, Moscow, Russia
Oliver W Frauenfeld, Texas A&M University, College Station, TX, United States, Xiaoqing Peng, LZU Lanzhou University, Key Laboratory of Western China's Environmental Systems(Ministry of Education), College of Earth and Environment Sciences, Lanzhou, China and Tingjun Zhang, LZU Lanzhou University, College of Earth and Environment Sciences, Lanzhou, China
Stine Højlund Pedersen1, Glen E Liston2, Mikkel P Tamstorf3 and Niels Martin Schmidt3, (1)University of Alaska Anchorage, Department of Biological Sciences, Anchorage, AK, United States, (2)Colorado State University, Cooperative Institute for Research in the Atmosphere (CIRA), Fort Collins, CO, United States, (3)Aarhus University, Arctic Research Centre, Department of Bioscience, Roskilde, Denmark
Nikita Zimov, Northeast Scientific Station, Cherskiy, Russia, Michael M Loranty, Colgate University, Geography, Hamilton, NY, United States, Colin Edgar, University of Alaska Fairbanks, Fairbanks, AK, United States, Heather Kropp, The Woodlands, TX, United States and Sergei A Zimov, Northeast Science Station, Cherskii, Russia
Shilong Ren, Xiaoqiu Chen, Qiming Qin, Yao Zhang and Zihua Wu, Peking University, Beijing, China
Valeriy Yu Ivanov1, Jingfeng Wang2, Husayn Ahmad El Sharif3, Desheng Liu4, Aleksey Y Sheshukov5, Valeriy Mazepa6, Stepan Shiyatov6 and Alexandr Sokolov7, (1)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (2)GA Ins of Tech-Civil & Env Eng, Atlanta, GA, United States, (3)Georgia Institute of Technology Main Campus, Lake Worth, FL, United States, (4)The Ohio State University, Department of Geography, Columbus, OH, United States, (5)Kansas State University, Manhattan, KS, United States, (6)Institute of Plant and Animal Ecology, the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia, (7)Arctic Research Station, Institute of Plant and Animal Ecology, the Ural Branch of the Russian Academy of Sciences, Labytnangi, Russia
John Arthur Gamon, Univ of Alberta, Edmonton, AB, Canada, K. Fred Huemmrich, University of Maryland Baltimore County, Baltimore, MD, United States, Gabriel Hmimina, University of Nebraska Lincoln, Lincoln, NE, United States and Rong Yu, University of Nebraska - Lincoln, School of Natural Resources, Lincoln, NE, United States
Gabriel Hmimina, University of Nebraska Lincoln, Lincoln, NE, United States, Rong Yu, University of Nebraska - Lincoln, School of Natural Resources, Lincoln, NE, United States, David P Billesbach, University of Nebraska - Lincoln, Biological Systems Engineering, Lincoln, NE, United States, Karl F Huemmrich, NASA Goddard Space Flight Cen., Greenbelt, MD, United States and John Arthur Gamon, Univ of Alberta, Edmonton, AB, Canada; University of Nebraska Lincoln, Center for Advanced Land Management Information Technologies, Lincoln, NE, United States