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

Journal Article · Thu Oct 01 04:00:00 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), Journal Name: Journal of Geophysical Research; (United States) Vol. 97; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

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