The Sensitivity of Ecosystem CO2 Flux in the Boreal Forests of Interior Alaska to Climatic Parameters

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 stan...

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Bibliographic Details
Main Author: Bonan, Gordon B.
Other Authors: NATIONAL CENTER FOR ATMOSPHERIC RESEARCH BOULDER CO
Format: Text
Language:English
Published: 1992
Subjects:
Ecology
Forestry
Inorganic Chemistry
Meteorology
*ALASKA
*ECOSYSTEMS
*CARBON DIOXIDE
*CLIMATE
*FLUX(RATE)
AIR
AVAILABILITY
CARBON
FORESTS
TUNDRA
ARCTIC REGIONS
MODELS
NETS
NUTRIENTS
RELEASE
SOILS
TEMPERATURE
TREES
SYMPOSIA
PARAMETERS
Component Reports
*Boreal forests
Soil warning
Spruce trees
Birch trees
Arctic
Fairbanks
Tundra
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADP007314
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007314
Description
Summary: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. 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.

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