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14 posts from August 2013

08/27/2013

Watch Us Collect Data in the Arctic

ESD researchers led by Division Director Susan Hubbard are part of a team engaged in highly diverse data collecting activities in the Arctic—to gain an advanced understanding, and modeling, of integrated ecosystem processes within the region.

08/26/2013

Efficient Pre-Conditioned Iterative Solution Strategies for the Electromagnetic Diffusion in the Earth: Finite-Element Frequency

ESD geophysicist Evan Um (in collaboration with ESD Geophysics Head Greg Newman and Michael Commer) recently formulated a three-dimensional finite-element-frequency-domain (FEFD) solution for electromagnetic diffusion and efficient solution strategies.

08/22/2013

ESD Leads Microbiome- to Watershed-Scale Study

ESD Division Director Susan Hubbard will lead a multiyear study funded by DOE’s Biological and Environmental Research office that will develop a predictive understanding of how the genomic functions of subsurface microbiomes affect watershed-scale biogeochemical processes.

08/15/2013

A Conservationist Approach to Creating Biofuels

ESD’s Steve Singer is part of a group of JBEI scientists who recently demonstrated a one-pot, wash-free, process for the ionic liquid pretreatment and saccharification of switchgrass, one of the leading biofuel feedstock candidates.

08/14/2013

Capillary Pressure and Saturation Relations for Supercritical CO2 and Brine in Sand

To test capillary-scaling-based predictions, ESD’s Tetsu Tokunaga and his investigative team (including ESD’s Jiamin Wong, Jong-Won Jung, Tae Wook Kim, Youngman Kim, and Wenming Dong) developed a high pressure Pc(Sw) controller/meter, allowing accurate Pc and Sw measurements.

08/12/2013

Airborne CO2 Observations in the U.S. Southern Great Plains

In an article recently published in Atmospheric Measurement Techniques, ESD’s Sebastien Biraud (along with ESD’s Margaret Torn, Bill Riley, and others) gathered and studied airborne measurements of atmospheric CO2 for a ten-year period (2002-2012) over the Atmospheric Radiation Measurement Program Climate Research Facility (US Southern Great Plains).

08/07/2013

Organic Matter Can Change Uranium Sorption Kinetics

ESD’s Ruth Tinnacher, Peter Nico, and Jim Davis recently investigated the effects of organic matter on uranium(VI) sorption kinetics—with the goal of qualitatively assessing the mechanisms of U(VI) sorption in ternary systems.

08/05/2013

Lindsey Sharing Geothermal Expertise in Kenya

ESD’s Nate Lindsey recently travelled to Nakuru, Kenya, as an instructor with the U.S.-East Africa Geothermal Partnership (EAGP)—one of three U.S. geothermal representatives who traveled there to teach young Kenyan scientists.

08/01/2013

Iterative Solution Strategies for Electromagnetic Diffusion

ESD geophysicist Evan Um (in collaboration with ESD Geophysics Head Greg Newman and Michael Commer) recently formulated a three-dimensional finite-element-frequency-domain (FEFD) solution for electromagnetic diffusion and efficient solution strategies.

Capillary Pressure and Saturation in Supercritical CO2 and Brine

In geologic carbon sequestration, reliable predictions of CO2 storage require understanding the capillary behavior of supercritical (sc) CO2.