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Remote sensing of wetland parameters related to carbon cyclingMeasurement of the rates of important biogeochemical fluxes on regional or global scales is vital to understanding the geochemical and climatic consequences of natural biospheric processes and of human intervention in those processes. Remote data gathering and interpretation techniques were used to examine important cycling processes taking place in wetlands over large geographic expanses. Large area estimation of vegetative biomass and productivity depends upon accurate, consistent measurements of canopy spectral reflectance and upon wide applicability of algorithms relating reflectance to biometric parameters. Results of the use of airborne multispectral scanner data to map above-ground biomass in a Delaware salt marsh are shown. The mapping uses an effective algorithm linking biomass to measured spectral reflectance and a means to correct the scanner data for large variations in the angle of observation of the canopy. The consistency of radiometric biomass algorithms for marsh grass when they are applied over large latitudinal and tidal range gradients were also examined. Results of a 1 year study of methane emissions from tidal wetlands along a salinity gradient show marked effects of temperature, season, and pore-water chemistry in mediating flux to the atmosphere.
Document ID
19930073163
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bartlett, David S.
(NASA Langley Research Center Hampton, VA, United States)
Johnson, Robert W.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1985
Publication Information
Publication: NASA. Ames Research Center, First Symposium on Biospheric Research
Subject Category
Earth Resources And Remote Sensing
Accession Number
93N70610
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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