Application of free-air CO sub 2 enrichment (FACE) technology to a forest canopy: A simulation study
- Brookhaven National Lab., Upton, NY (United States)
- Israel Inst. for Biological Research, Ness Ziona (Israel)
Forest ecosystems constitute an important part of the planet's land cover. Understanding their exchanges of carbon with the atmosphere is crucial in projecting future net atmospheric CO{sub 2} increases. It is also important that experimental studies of these processes be performed under conditions which are as realistic as possible, particularly with respect to photosynthesis and evapotranspiration. New technology and experimental protocols now exist which can facilitate studying an undisturbed forest canopy under long-term enriched CO{sub 2} conditions. The International Geosphere Biosphere Program of the International Council of Scientific Unions has established a subprogram on Global Change and Terrestrial Ecosystems (GCTE). This program is driven by two major concerns: to be able to predict the effects of global change on the structure and function of ecosystems, and to predict how these changes will control both atmospheric CO{sub 2} and climate, through various feedback pathways. Brookhaven National Laboratory (BNL) has developed a system for exposing field-grown plants to controlled elevated concentrations of atmospheric gases, without use of confining chambers that alter important atmospheric exchange processes. This system, called FACE for Free Air CO{sub 2} Enrichment. This paper focuses on the fluid mechanics of free-air fumigation and uses a numerical simulation model based on superposed gaussian plumes to project how the present ground-based system could be used to fumigate an elevated forest canopy.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5221033
- Report Number(s):
- BNL-47392; CONF-920814-4; ON: DE92013308
- Resource Relation:
- Conference: 9. world clean air congress and exhibition: towards the year 2000 - critical issues in the global environment, Montreal (Canada), 30 Aug - 4 Sep 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON DIOXIDE
DISPERSIONS
FORESTS
CANOPIES
CARBON CYCLE
CLIMATIC CHANGE
COMPUTERIZED SIMULATION
EARTH ATMOSPHERE
FUMIGANTS
MATHEMATICAL MODELS
TERRESTRIAL ECOSYSTEMS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ECOSYSTEMS
OXIDES
OXYGEN COMPOUNDS
PESTICIDES
SIMULATION
540110*
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)