| Title | Net Primary Productivity Distribution in the BOREAS Study Region from a Process Model Driven by Satellite and Surface Data |
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| Author | Liu, J; Chen, J M; Cihlar, J; Chen, W |
| Source | Journal of Geophysical Research vol. 104, issue 2, 1999 p. 27735-27754, https://doi.org/10.1029/1999jd900768  Open Access |
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| Year | 1999 |
| Alt Series | Earth Sciences Sector, Contribution Series 20042636 |
| Publisher | Wiley-Blackwell |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Saskatchewan; Manitoba |
| NTS | 63; 73; 64; 74; 62; 72 |
| Lat/Long WENS | -110.0000 -94.0000 60.0000 51.0000 |
| Subjects | Science and Technology; Nature and Environment; productivity; remote sensing; soil moisture; spectral analyses; vegetation; Boreal Ecosystem-Atmosphere Study (BOREAS); Boreal Ecosystem Productivity
Simulator (BEPS); advanced very high resolution radiometer (AVHRR); leaf area index (LAI) |
| Illustrations | graphs; tables; formulae; satellite images |
| Released | 1999 11 01 |
| Abstract | The purpose of this paper is to upscale tower measurements of net primary productivity (NPP) to the BOREAS study region by means of remote sensing and modeling. The Boreal Ecosystems Productivity
Simulator (BEPS) with a new daily canopy photosynthesis model was first tested in one conifer and one deciduous site. The simultaneous CO2 flux measurements above and below the overstory for model validation. Soil water holding capacity and gridded
daily meteorological data for the region were used as inputs to BEPS, in addition to 1 km resolution landcover and leaf area index (LAI) maps derived from the Advanced Very High Resolution Radiometer (AVHRR). NPP statistics for the various cover
types in the BOREAS region and in the southern and northern study areas are presented. Strong dependence of NPP on LAI was shown for the three major cover types: conifer forest, deciduous forest and cropland. BEPS was also used to calculate total
photosynthetically active radiation absorbed by the canopy in each pixel, and therefore light use efficiencies for NPP and gross primary productivity could also be m-1; mean NPP of forests excluding burnt areas was 234 g C m-1; and mean light use
efficiency for NPP was 0.4, 0.2, and 0.3 g C (MJ APAR)-1 for deciduous, conifer and crops, respectively. |
| GEOSCAN ID | 219438 |
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