Carbon emissions from the Arctic tundra could increase drastically as global warming thaws permafrost. Clues now obtained about the long-term effects of such thawing on carbon dioxide emissions highlight the need for more data.
Biogeochemistry, Climate change, Hydrology, Environmental sciences
The forests of San Diego County that have shaded 500 generations of local people and provided pine needle bedding, oak woodland and spiritual renewal could disappear. Overly intense fires in quick succession, along with drought, borer insects and climate extremes is laying waste to trees and creating a hostile environment for regrowth.
Trees . . . → Read More: “If San Diego lost its forest” by Walter Oechel
Bad news: Scientists say we could be underestimating Arctic methane emissions
Arctic permafrost has become a recent star in the climate change conversation, capturing the attention of scientists, activists and policymakers alike because of its ability to emit large quantities of carbon dioxide as well as methane — a particularly potent though relatively short-lived . . . → Read More: The Washington Post interview with Dr. Zona and Dr. Oechel about cold-season methane emissions in the Arctic
GCRG was awarded a grant by the US National Science Foundation for the proposal, “Methane loss from the Arctic: towards an annual budget of CH4 emissions from tundra ecosystem across a latitudinal gradient” (PI: Donatella Zona). In this research project we will measure CO2 and CH4 fluxes across a latitudinal transect in the arctic tundra . . . → Read More: GCRG awarded NSF grant towards the annual budget of CH4 emissions from tundra ecosystem across a latitudinal gradient
Assessing the spatial variability in peak season CO 2 exchange characteristics across the Arctic tundra using a light response curve parameterization.
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Oechel was ranked as a top influencer in the category of Agricultural Sciences for his long standing work on climate change as a plant eco-physiologist and systems ecologist.
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Expanding Spatial and Temporal Coverage of Arctic CH4 and CO2 Fluxes
AGU Fall Meeting 2013 Presented at American Geophysical Union, 9-13th of December,2013, San Francisco, California. Authors: Patrick Murphy, Walter Oechel, Virginie Moreaux, Salvatore Losacco, Donatella Zona.
Carbon storage and exchange in Arctic ecosystems is the subject of intensive study focused on determining rates, . . . → Read More: Expanding Spatial and Temporal Coverage of Arctic CH4 and CO2 Fluxes
The effects of elevated CO2, climate variability, and fire on the functioning of the chaparral of Southern California
Presented at MEDECOS XII Conference, July 6-9, 2011, Los Angeles, CA.
Oechel, Walter1,2, Alessandra Rossi1, Patrick Murphy1, John Kim3, Tom Bell1, Hongyan Luo4, David Lipson5
1Global Change Research Group, San Diego State University, San Diego, CA . . . → Read More: The effects of elevated CO2, climate variability, and fire on the functioning of the chaparral of Southern California
Authors: Ikawa, H.; Oechel, WC Source: CONTINENTAL SHELF RESEARCH Volume: 31 Issue: 13 Pages: 1357-1364 DOI: 10.1016/j.csr.2011.05.012 Published: SEP 1 2011
Abstract: Partial pressure of CO2 in equilibrium with sample water (pCO2) for the coastal water in the Chukchi Sea was continuously observed in summer, 2008. Average daily CO2 flux calculated from the pCO2 and gas transfer coefficients ranged from -0.144 to -0.0701 g C . . . → Read More: Air-sea CO2 exchange of beach and near-coastal waters of the Chukchi Sea near Barrow, Alaska
“Although many scientists agree that the current warming trend is likely to continue, it is unknown whether a warmer climate will turn the Arctic Coastal Plain from a sink to a source of greenhouse gases…. Cove Sturtevant and Dr. Walt Oechel from San Diego State University in California are addressing some of these questions . . . → Read More: GCRG on LI-COR NewsLine: Measure Methane Where it Matters: Part II, Barrow, Alaska