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Keyword: CO2

Carbon sequestration in wood and paper products

Publications Posted on: May 12, 2016
Recognition that increasing levels of CO2 in the atmosphere will affect the global climate has spurred research into reduction global carbon emissions and increasing carbon sequestration. The main nonhuman sources of atmospheric CO2 are animal respiration and decay of biomass. However, increases in atmospheric levels are attributed mainly to fossil fuel burning and land use change.

Going to great heights for data and atmospheric monitoring

Lab Notes Posted on: December 09, 2015
Going to Great Heights for Data and Atmospheric Monitoring Posted by Carita Chan, Research & Development, U.S. Forest Service, on March 31 http://blogs.usda.gov/2015/03/31/going-to-great-heights-for-data-and-atmospheric-monitoring/

Landscape structure, groundwater dynamics, and soil water content influence soil respiration across riparian-hillslope transitions in the Tenderfoot Creek Experimental Forest, Montana

Publications Posted on: July 28, 2015
Variability in soil respiration at various spatial and temporal scales has been the focus of much research over the last decade aimed to improve our understanding and parameterization of physical and environmental controls on this flux. However, few studies have assessed the control of landscape position and groundwater table dynamics on the spatiotemporal variability of soil respiration.

Diffusional flux of CO2 through snow: Spatial and temporal variability among alpine-subalpine sites

Publications Posted on: May 28, 2015
Three alpine and three subalpine sites were monitored for up to 4 years to acquire data on the temporal and spatial variability of CO2 flux through snowpacks. We conclude that the snow formed a passive cap which controlled the concentration of CO2 at the snow-soil interface, while the flux of CO2 into the atmosphere was controlled by CO2 production in the soil.

Preliminary measurements of CO2 in melting snow

Publications Posted on: May 28, 2015
Measurements of CO2 near the snow-soil interface showed elevated concentrations up to 2120 ppmv. Concentrations greater than 1700 ppmv were observed 0.45 m above the snowsoil interface. The increase in CO2 concentrations in the snow coincided with the beginning of melt. Measurements of the pH and alkalinity of the meltwater from the base of the snowpack were consistent with the measured CO2 levels.

Long term consequences of a controlled slash burn and slash mastication to soil moisture and CO2 at a southern Colorado site

Publications Posted on: May 23, 2013
Thinning of forest stands is frequently used to reduce the risk of catastrophic fire. But thinning requires that the refuse (or slash) be removed from the site, which can be done either by burning it or by mastication and dispersal. Either method has long term consequences to the soil and to soil moisture and soil CO2 levels.

Historical and modern disturbance regimes, stand structures, and landscape dynamics in pinyon-juniper vegetation of the Western U.S.

Publications Posted on: December 01, 2010
Pinon-juniper is a major vegetation type in western North America.

Adaptation of growth and respiration of three varieties of Caragana to environmental temperature

Publications Posted on: February 05, 2008
Growth and respiratory characteristics of Caragana korshinskii from Wushen and two different seed sources of C. davazamcii from Helinger and Yijinhuole, all grown at the same conditions, were determined by measuring metabolic heat and CO2 production rates by isothermal calorimetry at 5 °C intervals from 10 to 40 °C. Substrate carbon conversion efficiencies and growth (anabolic) rates were calculated from the measured data.

Interpreting, measuring, and modeling soil respiration

Publications Posted on: September 04, 2007
This paper reviews the role of soil respiration in determining ecosystem carbon balance, and the conceptual basis for measuring and modeling soil respiration. We developed it to provide background and context for this special issue on soil respiration and to synthesize the presentations and discussions at the workshop. Soil respiration is the largest component of ecosystem respiration.

The likely impact of elevated [CO2], nitrogen deposition, increased temperature and management on carbon sequestration in temperate and boreal forest ecosystems: a literature review

Publications Posted on: April 02, 2007
Temperate and boreal forest ecosystems contain a large part of the carbon stored on land, in the form of both biomass and soil organic matter. Increasing atmospheric [CO2], increasing temperature, elevated nitrogen deposition and intensified management will change this C store.

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