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Title: Sensitivity of ecosystem CO sub 2 flux in the boreal forests of interior Alaska to climatic parameters

Abstract

An ecophysiological model of carbon uptake and release was used to examine C02 fluxes in 17 mature forests near Fairbanks, Alaska. Under extant climatic conditions, ecosystem C02 flux ranged from a loss of 212 g C02 m-2 yr-1 in a black spruce stand to an uptake of 2882 g C02 m-2 yr-1 in a birch stand. Increased air temperature resulted in substantial soil warming. Without concomitant increases in nutrient availability, large climatic warming reduced ecosystem C02 uptake in all forests. Deciduous and white spruce stands were still a sink for C02, but black spruce stands became, on average, a net source Of CO2- With increased nutrient availability that might accompany soil warming, enhanced tree growth increased C02 uptake in conifer stands.

Authors:
Publication Date:
Research Org.:
National Center for Atmospheric Research, Boulder, CO (United States)
OSTI Identifier:
7263877
Alternate Identifier(s):
OSTI ID: 7263877
Report Number(s):
AD-P-007314/8/XAB
Resource Type:
Technical Report
Resource Relation:
Other Information: This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 990. Volume 2', AD-A253 028, p391-395. See also Volume 1, AD-A253 027
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ALASKA; CARBON CYCLE; CARBON DIOXIDE; ECOLOGICAL CONCENTRATION; AMBIENT TEMPERATURE; ARCTIC REGIONS; BOREAL REGIONS; CARBON SINKS; CLIMATIC CHANGE; FORESTS; MATHEMATICAL MODELS; NUTRIENTS; SOILS; TERRESTRIAL ECOSYSTEMS; TREES; TUNDRA; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; DEVELOPED COUNTRIES; ECOSYSTEMS; NORTH AMERICA; OXIDES; OXYGEN COMPOUNDS; PLANTS; POLAR REGIONS; SINKS; USA 540120* -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-); 540220 -- Environment, Terrestrial-- Chemicals Monitoring & Transport-- (1990-)

Citation Formats

Bonan, G.B. Sensitivity of ecosystem CO sub 2 flux in the boreal forests of interior Alaska to climatic parameters. United States: N. p., 1992. Web.
Bonan, G.B. Sensitivity of ecosystem CO sub 2 flux in the boreal forests of interior Alaska to climatic parameters. United States.
Bonan, G.B. Sun . "Sensitivity of ecosystem CO sub 2 flux in the boreal forests of interior Alaska to climatic parameters". United States. doi:.
@article{osti_7263877,
title = {Sensitivity of ecosystem CO sub 2 flux in the boreal forests of interior Alaska to climatic parameters},
author = {Bonan, G.B.},
abstractNote = {An ecophysiological model of carbon uptake and release was used to examine C02 fluxes in 17 mature forests near Fairbanks, Alaska. Under extant climatic conditions, ecosystem C02 flux ranged from a loss of 212 g C02 m-2 yr-1 in a black spruce stand to an uptake of 2882 g C02 m-2 yr-1 in a birch stand. Increased air temperature resulted in substantial soil warming. Without concomitant increases in nutrient availability, large climatic warming reduced ecosystem C02 uptake in all forests. Deciduous and white spruce stands were still a sink for C02, but black spruce stands became, on average, a net source Of CO2- With increased nutrient availability that might accompany soil warming, enhanced tree growth increased C02 uptake in conifer stands.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 1992},
month = {Sun Mar 01 00:00:00 EST 1992}
}

Technical Report:
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