NDLI: Estimating Regional Daytime Net Carbon Dioxide Flux using Remotely Sensed Instantaneous Measurements

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Estimating Regional Daytime Net Carbon Dioxide Flux using Remotely Sensed Instantaneous Measurements

Content Provider	CiteSeerX
Author	Bryant, Ross Holifield, Ra D. Verdugo, Charmaine L. Moran, Susan Emmerich, William E.
Abstract	Atmospheric carbon dioxide (CO2) is steadily increasing as a result of the world’s increasing use of fossil fuels and wood biomass. However, the impact of increases in CO2 on the global carbon cycle is unclear. Semiarid grasslands comprise a large portion of the world’s rangeland ecosystem and may play a significant role in the carbon cycle. In a previous study, regional estimates of instantaneous net CO2 flux were obtained by using a Water Deficit Index (WDI) derived from satellite imagery over a five-year period (1996-2000) covering a grassland site in the Walnut Gulch Experimental Watershed (WGEW). In this study, a linear relationship (R2 = 0.95) was found to exist between instantaneous and daytime net CO2 flux estimates, where daytime is the period from 6 a.m. to 6 p.m. This linear relationship was used to convert instantaneous estimates of net CO2 flux to daytime estimates, and maps depicting spatially distributed daytime net CO2 flux were generated for WGEW. Remote sensing offers a viable means of obtaining regional estimates of daytime net CO2 flux in semiarid grasslands.
File Format	PDF
Access Restriction	Open
Subject Keyword	Instantaneous Net Co2 Flux World Rangeland Ecosystem Viable Mean Net Co2 Flux Water Deficit Index Global Carbon Cycle Wood Biomass Instantaneous Measurement Instantaneous Estimate Carbon Cycle Semiarid Grassland Grassland Site Five-year Period Regional Estimate Daytime Net Co2 Flux Estimate Atmospheric Carbon Dioxide Daytime Net Co2 Flux Walnut Gulch Experimental Watershed
Content Type	Text

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