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Keyword: carbon dioxide

Soil greenhouse gas, carbon content, and tree growth response to biochar amendment in western United States forests

Publications Posted on: February 21, 2019
Restoring overstocked forests by thinning and pyrolyzing residual biomass produces biochar and other value‐added products. Forest soils amended with biochar have potential to sequester carbon (C), improve soil quality, and alter greenhouse gas (GHG) emissions without depleting nutrient stocks. Yet, few studies have examined the effects of biochar on GHG emissions and tree growth in temperate forest soils.

Mountain peatlands range from CO2 sinks at high elevations to sources at low elevations: Implications for a changing climate

Publications Posted on: January 06, 2017
Mountain fens found in western North America have sequestered atmospheric carbon dioxide (CO2) for millennia, provide important habitat for wildlife, and serve as refugia for regionally-rare plant species typically found in boreal regions. It is unclear how Rocky Mountain fens are responding to a changing climate.

Ecosystem fluxes are underestimated due to measurement tool errors

Science Spotlights Posted on: August 16, 2016
The eddy covariance technique is used worldwide to measure the exchange of energy and mass between ecosystems and the atmosphere. Data from these flux sites are combined across continental and global networks and used to calibrate climate models and to inform water and carbon policy. Yet, at a vast majority of these sites, there is surface energy imbalance, bringing into question the accuracy of these measurements.

Total belowground carbon flux in subalpine forests is related to leaf area index, soil nitrogen, and tree height

Publications Posted on: August 10, 2016
In forests, total belowground carbon (C) flux (TBCF) is a large component of the C budget and represents a critical pathway for delivery of plant C to soil. Reducing uncertainty around regional estimates of forest C cycling may be aided by incorporating knowledge of controls over soil respiration and TBCF.

Models for quantifying smoke emissions and impacts

Projects Posted on: July 25, 2016
In this study, we determined the locations of wildfire-derived emissions and their aggregate impacts on Salt Lake City, Utah, a major urban center downwind of the fires. The USFS Rocky Mountain Research Station’s new Wildland Fire Emission Inventory Version 2 model was used to determine the location and timing of wildfire emissions.

Quantifying simultaneous fluxes of ozone, carbon dioxide and water vapor above a subalpine forest ecosystem

Publications Posted on: May 29, 2015
Assessing the long-term exchange of trace gases and energy between terrestrial ecosystems and the atmosphere is an important priority of the current climate change research. In this regard, it is particularly significant to provide valid data on simultaneous fluxes of carbon, water vapor and pollutants over representative ecosystems.

Pressure pumping of carbon dioxide from soil

Publications Posted on: May 29, 2015
Recent interest in atmospheric increases in carbon dioxide have heightened the need for improved accuracy in measurements of fluxes of carbon dioxide from soils.

CO2, CH4 and N2O flux through a Wyoming snowpack and implications for global budgets

Publications Posted on: May 28, 2015
Increasing atmospheric concentrations of the three main greenhouse gases-carbon dioxide, methane, and nitrous oxide account for about 70% of anticipated global warming, but the production-consumption budgets are not balanced for any of these gases2. Snow can cover between 44 and 53% of the land area of the Northern Hemisphere3 and may be several metres deep in alpine and sub-alpine regions for more than half the year.

Potential impacts of carbon dioxide on invasive toadflax

Media Gallery Posted on: April 28, 2015
Rocky Mountain Research Station scientists are investigating how climate change, namely elevated levels of CO2, might impact invasive species and classical biological control of weeds.