Gas Transport, Production and Consumption Rates in the Tapajos National Forest, Para, Brazil, Determined Using RADON-222 Flux Divergence
Christopher
Sargent
Martens, UNC-Chapel Hill, cmartens@email.unc.edu
(Presenting)
Thomas
J.
Shay, UNC-Chapel Hill, tshay@email.unc.edu
Howard
P.
Mendlovitz, UNC-Chapel Hill, mendlovitz@unc.edu
José
Mauro
Moura, CENA-USP, jmauro@esalq.usp.br
Risonaldo
Leal
Lima, LBA-ECO Santarém, risonaldo@lbaeco.com.br
Osvaldo
Luiz Leal de
Moraes, Universidade Federal de Santa Maria, moraes@mail1.ufsm.br
Patrick
Michael
Crill, University of Stockholm, patrick.crill@unh.edu
W.
Stephen
Woodward, UNC-Chapel Hill, woodward@unc.edu
Cibelle
Gonçalves
Sampaio, LBA-ECO Santarém, cibelle@lbaeco.com.br
Radon-222 flux divergence within the forest canopy can be calculated from continuous canopy air profile and campaign-style soil flux measurements with our unique flow –through radon detectors and soil fluxometers. Radon flux divergence can be utilized to quantitatively determine the net rates and canopy vertical distribution of CO2 or methane and other trace gas production and consumption processes when combined with their soil flux and canopy profile measurements. The radon data can also be utilized to determine canopy air residence times throughout the diel cycle.
We plan to use flux divergence calculations in collaboration with other groups to determine respiration rates versus canopy height and to distinguish the vertical source/sink distribution and net flux of methane from dispersed forest sources
Submetido por Christopher S. Martens em 17-MAR-2004