The Arctic landscape holds massive potential to affect the global carbon balance. Soils of the northern permafrost region account for approximately 50 percent of the estimated global below-ground organic carbon pool. The total soil organic carbon in the first 3 m in northern circumpolar permafrost, excluding yedoma, is ca.1024 PgC. Under a projected warmer and . . . → Read More: Seasonal and Inter-Annual Controls on CO2 Flux in Arctic Alaska
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GCRG was awarded a grant by the US Department of Energy for the proposal, “Seasonal and Inter-Annual Controls on CO2 Flux in Arctic Alaska” (PI: Walt Oechel). The grant will allow GCRG to operate eddy covariance flux towers at Barrow, Atqasuk and Ivotuk for the next 3 years. Read more about the project here. Our 2010 summer research activities near Barrow were very successful. From July 1 to August 12, 2010 Ph.D. candidate Cove Sturtevant and assistant Tim Hubbard placed portable eddy covariance towers at 21 lake or vegetated drained lake features over a 150 square mile area near Barrow, Alaska. A total of three portable towers were deployed . . . → Read More: Summer 2010 Field Report: Barrow, Alaska During the summer of 2010 Master’s degree candidate Tom Bell completed his field research in the CIBNOR desert preserve near La Paz, BCS, Mexico. From June to August, Tom monitored lateral litter flux experiments, which had commenced in the summer of 2009. Collection of vertical and lateral litter traps was completed over two time periods . . . → Read More: Summer 2010 Field Report: La Paz, Mexico GCRG will work with the National Aeronautics and Space Administration’s Jet Propulsion Lab to measure the greenhouse gas effect on the Arctic. The research team will collect data that will provide unprecedented experimental insights into Arctic carbon cycling, especially the release of the important greenhouse gases such as carbon dioxide and methane. The study is . . . → Read More: GCRG Heads for the Skies with NASA-Funded Research 
Anthropogenic activities have disrupted biogeochemical cycles with subsequent increases in the emission of radiatively important trace gases. Wetlands are natural sources of CO2, CH4 and N2O with seasonal variations in anthropogenic inputs, temperature, salinity, and water modulating emissions. Variations in trace gas flux in mangrove ecosystems using eddy covariance, soil coring, leaf litter sampling, and . . . → Read More: Seasonal Variations of Trace Gas Flux in Mangrove Ecosystem in Baja California Sur, Mexico Land-atmosphere carbon fluxes along a thaw-lake chronosequence on the Arctic Coastal Plain of AlaskaThaw lakes and vegetated thaw lake basins (VTLBs) are common features in permafrost zones and can comprise a large proportion of the land surface [1-7] (Figure 1). Thaw lakes on the Arctic Coastal Plain (ACP) of Alaska are estimated to have begun forming approximately 10,000 years ago in the Holocene when the climate was warmer . . . → Read More: Land-atmosphere carbon fluxes along a thaw-lake chronosequence on the Arctic Coastal Plain of Alaska Lateral transport of carbon by wind and water in the form of litter fall could represent a significant portion of carbon entering or exiting an ecosystem. In La Paz, Baja California Sur, Mexico, GCRG established a permanent Eddy Covariance tower in 2001. Eddy Covariance tracks daily, seasonal and yearly ecosystem carbon flux, but may be . . . → Read More: Vertical and Lateral Carbon Flux in a Larrea/Cardon Ecosystem near La Paz, BCS, Mexico The 17th Annual Albert W. Johnson University Research Lecture Walter C. Oechel, Ph.D. “Global Change: Is the World Beyond Repair?” March 21, 2007 | 3:00-4:30pm | Aztec Athletic Center Auditorium Flyer The objective of this study is to identify and describe the patterns of and controls on air-sea CO2 exchange at distinct geographic locations (eg, Barrow AK, Bodega Bay CA, San Diego CA) and understand important characteristics of physical and biological processes of the coastal sea. Personnel: Hiroki Ikawa, Walt Oechel Duration: 2006 – present |
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