1982 annual report and proposal for continuing research on the potential responses of tundra ecosystems to perturbations from energy development. Volume I

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5807520

Oechel, W C

The Arctic Tundra Simulator (ARTUS) describes the annual patterns of heat and water balance, carbon fixation, plant growth, and nitrogen and phosphorus cycling in tussock tundra. ARTUS runs in 1-day time steps for a growing season from 1 May to 17 September and can run for any number of years. The daily sequence of calculations is: environmental, soil processes, nutrient uptake, moss processes, and vascular plant processes. The model was validated by comparing calculated and measured annual totals of processes, peak season biomasses and nutrient contents, and seasonal progression of biomass, carbohydrate contents, and nutrient contents. The validation variables were peak season new leaf and stem biomass by species, peak season nitrogen and phosphorus contents by species, nitrogen and phosphorus uptake by species, ecosystem respiration, and peak season depth of thaw. Several experiments and sets of observations were used for validating ARTUS. Values for measured and simulated variables with different experimental treatments at Eagle Creek, data obtained from sites along the TAPS haul road and at Cape Thompson on vascular plant biomass and nutrient content were used for validating ARTUS.

• Research Organization: San Diego State Univ., CA (USA). Systems Ecology Research Group
• DOE Contract Number: AC03-77EV01525
• OSTI ID: 5807520
• Report Number(s): DOE/EV/01525-T7; ON: DE86008921
• Country of Publication: United States
• Language: English

Related Subjects

510500* -- Environment
Terrestrial-- Site Resource & Use Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
ARCTIC REGIONS
CARBON DIOXIDE FIXATION
COMPUTERIZED SIMULATION
ECOLOGY
ECOSYSTEMS
ELEMENTS
ENERGY BALANCE
GROWTH
MATHEMATICAL MODELS
MINERAL CYCLING
NITROGEN
NONMETALS
PHOSPHORUS
PLANT GROWTH
POLAR REGIONS
SIMULATION
TERRESTRIAL ECOSYSTEMS
TESTING
TUNDRA
VALIDATION