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Biosphere/atmosphere CO2 exchange in tundra ecosystems - Community characteristics and relationships with multispectral surface reflectanceCO2 exchange rates were measured at selected tundra sites near Bethel, Alaska using portable, climate-controlled, instrumented enclosures. The empirically modeled exchange rate for a representative area of vegetated tundra was 1.2 +/- 1.2 g/sq m/d, compared to a tower-measured exchange over the same time period of 1.1 +.0- 1.2 g/sq m/d. Net exchange in response to varying light levels was compared to wet meadow and dry upland tundra, and to the net exchange measured by the micrometeoroidal tower technique. The multispectral reflectance properties of the sites were measured and related to exchange rates in order to provide a quantitative foundation for the use of satellite remote sensing to monitor biosphere/atmosphere CO2 exchange in the tundra biome.
Document ID
19930032546
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Whiting, Gary J.
(Hughes STX Corp.; NASA, Langley Research Center Hampton, VA, United States)
Bartlett, David S.
(New Hampshire Univ. Durham, United States)
Fan, Song-Miao
(NASA Langley Research Center Hampton, VA, United States)
Bakwin, Peter S.
(NASA Langley Research Center Hampton, VA, United States)
Wofsy, Steven C.
(Harvard Univ. Cambridge, MA, United States)
Date Acquired
August 15, 2013
Publication Date
October 30, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: D15
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
93A16543
Distribution Limits
Public
Copyright
Other

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