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Ameriflux Network Will Track CO2 Transfer In Forests

one knows, however, is how much CO2 is stored in the world's plants and soils, how much additional storage capacity is available and what will happen to all that carbon dioxide when plants die and decay.

"The ability to make direct, instantaneous measurements of CO2 exchange between the forest and atmosphere is the first step toward answering these questions," Teeri said. "It will allow us to see how CO2 exchange is affected by changes in precipitation, temperature, land use, carbon dioxide concentration and levels of air pollution on a daily basis."

At the U-M Biological Station, construction of a 153-foot AmeriFlux tower will begin this May in the middle of an undisturbed stand of hardwoods---mostly aspen, red maple and red oak with some white pine. Sensing instruments will be installed at various levels on the tower from above the forest canopy to ground level. Beginning in July 1998, scientists at the Biological Station will begin collecting data from the instruments and recording the data on a computer system.

"The Biological Station was selected for the network because it is located on the boundary between the hardwood forests and the boreal [spruce] forests of North America," Teeri said. "As climate change occurs in the future, there may well be some major biological responses occurring at this forest boundary."

Currently there are about 24 AmeriFlux towers in operation or under construction in North America (map available on request), and Teeri said the network is likely to expand in the next few years. Towers currently in operation are located at Harvard Forest in Massachusetts; Manitoba, Canada; northern Alaska; the Oak Ridge National Laboratory in Tennessee and several other locations.

A multi-site data archive to store and analyze information from all AmeriFlux sites will be developed and managed by the Carbon Dioxide Information and Analysis Center (CDIAC) at the Oak
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Contact: Sally Pobojewski
pobo@umich.edu
(734) 647-1844
University of Michigan
10-Apr-1998


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