Biosphere/atmosphere CO[sub 2] exchange in tundra ecosystems - community characteristics and relationships with multispectral surface reflectance

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/91JD01027· OSTI ID:6919014

Whiting, G J; Bartlett, D S; Fan, Songmiao; Bakwin, P S; Wofsy, S C ^[1]

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1. NASA, Langley Research Center, Hampton, VA (United States) New Hampshire Univ., Durham (United States) Harvard Univ., Cambridge, MA (United States)

CO2 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 CO[sub 2] exchange in the tundra biome. 28 refs.

• OSTI ID: 6919014
• Journal Information: Journal of Geophysical Research; (United States), Vol. 97; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
REMOTE SENSING
GROUND COVER
SPECTRAL REFLECTANCE
TUNDRA
ATMOSPHERIC CHEMISTRY
ECOSYSTEMS
BIOSPHERE
EARTH ATMOSPHERE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)