BOREAS -- Trace Gas Biogeochemistry (TGB) Group

The BOREAS Information System

The Trace Gas Biogeochemistry (TGB) Group

TGB Group Objectives

The objectives of the TGB group in BOREAS are:

To characterize the flux of trace gases between the soil and the atmosphere, primarily for CO₂ and CH₄, and including isotopic composition, N₂O and CO along the major soil, vegetation, moisture and disturbance gradients.
To characterize the flux of non-methane hydrocarbons from representative boreal canopies, primarily in jack pine, aspen and spruce stands, in the SSA, with a smaller effort at NSA.
To establish a baseline dataset of atmospheric NMHC in the SSA to identify biogenic and industrial sources.
To measure long-term accumulation of carbon in boreal soils along the major soil, vegetation, moisture and disturbance gradients.

BOREAS Field Campaigns 1994

Ten TGB teams used chamber measurements and other techniques to characterize the flux of trace gases between the soil and the atmosphere, including CO₂, CH₄ and non-methane hydrocarbons (NMHC's). The TGB group is also trying to quantify the long-term accumulation of carbon in boreal soils. View preliminary results from the TGB group.

For more information on TGB data, send e-mail to Sara Golightley,
the BORIS representative for the TGB group.

The TGB Teams

Click on a team name below to view information on a specific team's BOREAS activities.

TGB-1
Magnitude and Control of Trace Gas Exchange in Boreal Ecosystems
P.I.(s): Patrick M. Crill -- University of New Hampshire
Location: NSA
Sites: OJP, YJP, Beaver Pond, OBS
Duration: May-September

TGB-3
Carbon Dioxide and Methane Exchanges Between Wetland and Upland Soils and the Atmosphere, NSA
P.I.(s): Timothy R. Moore, Roger Knowles -- McGill University
Co-I's: John Amaral, Lianne Bellisario, Jill Bubier, Kathleen Savage -- McGill University
Location: NSA
Sites: Fen, palsa, jack pine (successional gradient), aspen and other auxiliary sites
Duration: May-September 1994

TGB-4
The Fluxes of Energy and Trace Gases from Beaver Ponds and Dry Upland Forest Floor in the NSA
P.I.(s): Nigel T. Roulet -- York University

TGB-5
Trace Gas Exchange in the Boreal Forest Biome: Effects of Fire and Beaver Activity
P.I.(s): Richard G. Zepp -- Environmental Research Laboratory (AERL), U.S. Environmental Protection Agency
Co-I(s): Roger A. Burke -- AERL; Joel S. Levine, W.R. Cofer -- NASA/Langley; Dennis S. Ojima, William J. Parton -- Colorado State Univ.; Brian J. Stocks -- Forestry Canada; Richard A. Bourbonniere -- Environment Canada; M.A. Moran, R.E. Hodson -- Univ. of Georgia
Location: NSA
Sites: mostly auxiliary recent burn sites (less than 15 yrs) (total of 5; 4 upland black spruce, 1 jack pine); work on 2 beaver pond sites in NSA
Duration: May to September

TGB-6
Isotopic Composition of Methane Produced and Consumed in Boreal Ecosystems
PI(s): Martin Wahlen, Bruce Deck -- Scripps Institution of Oceanography, University of California, San Diego
Location: NSA and SSA
Sites: SSA wet/dry - possibly fen - black spruce - aspen; NSA wet/dry - possibly beaver pond - old black spruce - jack pine

TGB-7
Atmospheric Transport of Agricultural Pesticides into the Boreal Ecosystem
P.I.(s): Don T. Waite -- Environment Canada

TGB-8
The Relationship Between Non-Methane Hydrocarbon Emission and Leaf Carbon Balance in the Boreal Forest: An Approach for Mechanistic Ecosystem Modeling
P.I.(s): Manuel Lerdau and Russell Monson -- University of Colorado
Location: SSA
Sites: OBS and OA
Duration: IFCs 1994

TGB-9
Ambient Measurements of Ozone, Nitrogen Oxides and Non-Methane Hydrocarbons
P.I.(s): Hiromi Niki -- York University, Ontario
Location: SSA (some NSA)
Sites: young and old aspen, black spruce, pine
Duration: August 1993, mostly IFCs 1994

TGB-10
Measurement of Biogenic Hydrocarbon Fluxes and Surface Exchange Processes in a Boreal Forest
P.I.(s): Hal Westberg -- Washington State University
Co-I(s): Nick Hewitt -- Lancaster University
Location: SSA (some NSA)
Sites: young and old aspen, black spruce, pine
Duration: August 1993, mostly IFCs 1994

TGB-12
Input, Accumulation, and Turnover of Carbon in Boreal Forest Soils: Integrating ¹⁴C Isotopic Analyses with Ecosystem Dynamics
P.I.(s): Susan E. Trumbore -- University of California, Irvine
Co-I(s): Eric A. Davidson -- Woods Hole Research Center; Jennifer Harden, Eric Sundquist -- USGS

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Last Updated: November 5, 1997