The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform

David J. Nowak - One of the best experts on this subject based on the ideXlab platform.

  • Atmospheric Carbon Reduction by Urban Trees
    Journal of Environmental Management, 1993
    Co-Authors: David J. Nowak
    Abstract:

    Trees, because they sequester Atmospheric Carbon through their growth process and conserve energy in urban areas, have been suggested as one means to combat increasing levels of Atmospheric Carbon. Analysis of the urban forest in Oakland, California (21 % tree cover), reveals a tree Carbon storage level of 11.0 metric tonslhectare. Trees in the area of the 1991 fire in Oakland stored approximately 14 500 metric tons of Carbon, 10% of the total amount stored by Oakland's urban forest. National urban forest Carbon storage in the United States (28% tree cover) is estimated at between 350 and 750 million metric tons. Establishment of 10 million urban trees annually over the next 10 years is estimated to sequester and offset the production of 363 million metric tons of Carbon over the next 50 years-less than I % of the estimated Carbon emissions in the United States over the same time period. Advantages and limitations of managing urban trees to reduce Atmospheric Carbon are discussed.

Alf Ekblad - One of the best experts on this subject based on the ideXlab platform.

James A. Bunce - One of the best experts on this subject based on the ideXlab platform.

  • Responses of respiration to increasing Atmospheric Carbon dioxide concentrations
    Physiologia Plantarum, 1994
    Co-Authors: James A. Bunce
    Abstract:

    It has been recently recognized that increases in Carbon dioxide concentration such as are anticipated for the earth's atmosphere in the next century often reduce plant respiration. There can be both a short-term reversible effect of unknown cause, and long-term acclimation, which may reflect the synthesis and maintenance of less metabolically expensive materials in plants grown at elevated Carbon dioxide concentrations. Because respiration provides energy and Carbon intermediates for growth and maintenance, reductions in respiration by increasing Carbon dioxide concentrations may have effects on physiology beyond an improvement in plant Carbon balance. As Atmospheric Carbon dioxide concentration increases, reduced respiration could be as important as increased photosynthesis in improving the ability of terrestrial vegetation to act as a sink for Carbon, but it could also have other consequences.

Daniel Comstedt - One of the best experts on this subject based on the ideXlab platform.

Chaozi Wang - One of the best experts on this subject based on the ideXlab platform.

  • Natural water input deposits little Atmospheric Carbon into groundwater in a desert
    CATENA, 1
    Co-Authors: En Xie, Xiao Zhao, Chaozi Wang
    Abstract:

    Abstract Anomalous CO2 absorption by soils in drylands has been reported worldwide. It has been reported that Atmospheric Carbon can first be converted into soil dissolved inorganic Carbon, and then be carried and rapidly sequestered in groundwater through irrigation (artificial water input). Nevertheless, the deposition rate may be inapplicable in drylands without artificial water input, and the fate of the Atmospheric Carbon may also be different. Here, we assessed the amount of the local rainfall, evaluated the elapsed time of the natural water infiltration and the feldspar weathering-induced Carbon consumption rate, and analysed the characteristics of soil inorganic Carbon in the Mu Us Desert, northwest China, where we have previously studied abiotic Atmospheric Carbon absorption and the soil water input mainly derives from precipitation. The results showed that, even with extreme precipitation, the inputted water could not rapidly transport Carbon to the first aquiclude, indicating that natural water input cannot deposit the majority of the Atmospheric Carbon absorbed by soil into groundwater. Further analysis indicated that feldspar weathering might be able to rapidly consume most of the Atmospheric Carbon. The consumed Carbon would be converted into pedogenic Carbonate and conserved in subsoil due to the transportation of inputted water. These results can provide a basis for determining the fate of Atmospheric Carbon absorbed by soils in drylands.