PAR extinction in shortgrass ecosystems: Effects of clumping, sky conditions and soil albedo

Agricultural and Forest Meteorology

Volumn 105, Issue 1-3, 2000, Pages 21-41

  Nouvellon, Yann ^a   Bégué, Agnès ^b   Susan Moran, M ^a   Seen, Danny Lo ^b   Rambal, Serge ^c   Luquet, Delphine ^b   Chehbouni, Ghani ^d   Inoue, Yoshio ^e  

^a SOUTHWEST WATERSHED RESEARCH CENTER   (United States)

^b CIRAD   (France)

^c CENTRE D ECOLOGIE FONCTIONNELLE ET EVOLUTIVE   (France)

^d ORSTOM/IMADES   (Mexico)

^e NATIONAL INSTITUTE FOR AGRO ENVIRONMENTAL SCIENCES   (Japan)

Author keywords

Extinction coefficient; Markov model; PAR absorption; PAR interception; Shortgrass ecosystem

Indexed keywords

ALBEDO; BOUNDARY LAYER; GRASSLAND; PHOTOSYNTHETICALLY ACTIVE RADIATION; VEGETATION COVER;

EID: 0034693669     PISSN: 01681923     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0168-1923(00)00194-5     Document Type: Conference Paper

References (70)

1. Stand structure and light penetration. II. A theoretical analysis
2. Evaluation of structure description requirements for predicting gap fraction of vegetation canopies
3. Evaluation of an improved version of SAIL model for simulating bidirectional reflectance of sugar beet canopies
4. Scale dependence of absorption of photosynthetically active radiation in terrestrial ecosystems
5. The physical nature of solar radiation in heterogeneous canopies: Spatial and temporal attributes
6. Canopy radiative transfer models for spherical and known leaf inclination angle distributions: A test in an oak-hickory forest
7. Gap fraction and canopy architecture of beet and wheat crops
8. Modelling hemispherical and directional radiative fluxes in regular-clumped canopies
9. Radiative transfer in shrub savanna sites in Niger: Preliminary results from HAPEX-Sahel. 2. Photosynthetically active radiation interception of the woody layer
10. Shortwave radiation budget of Sahelian vegetation. 1. Techniques of measurements and results during HAPEX-Sahel
11. Shortwave radiation budget of Sahelian vegetation. 2. Radiative transfer models
12. Influence of precipitation on perennial grass production in the semidesert southwest
13. Extinction coefficients for radiation in plant canopies calculated using an ellipsoidal inclination angle distribution
14. Derivation of an angle density function for canopies with ellipsoidal leaf angle distributions
15. A comparison of direct and indirect methods for estimating forest canopy leaf area
16. Measuring leaf area index of plant canopies with branch architecture
17. Evaluation of hemispherical photography for determining plant area index and geometry of forest stand
18. Effects of plant canopy structure on light interception and photosynthesis
19. Radiation regime and canopy architecture in a boreal aspen forest
20. The interception and absorption of radiation in plant stands
21. Photosynthesis of leaf canopies
22. A comparison of optical and direct methods for estimating foliage surface area index in forests
23. Spectral estimation of absorbed photosynthetically active radiation in corn canopies
24. Modeling radiative transfer in heterogeneous 3D vegetation canopies
25. Simple beta distribution representation of leaf orientation in vegetation canopies
26. An overview of the 1997 activities of the semi-arid land-surface-atmosphere (SALSA program)
27. A method to estimate instantaneous and daily intercepted photosynthetically active radiation using a hemispherical sensor
28. Leaf area development of four plant communities in the Colorado steppe
29. Assessing the interception of photosynthetically active radiation in winter wheat
30. Extinction of net radiation in different crop canopies
31. Leaf area dynamics of shortgrass prairie in Colorado
32. The hot spot effect in plant canopy reflectance
33. A Markov chain model of canopy reflectance
34. Cartographie des parametres de surface utiles au climat a partir des donnees multiangulaires POLDER pendant HAPEX-Sahel
35. A critical review of light models for estimating the shortwave radiation regime of plant canopies
36. Radiation absorption and use by humid savanna grassland: Assessment using remote sensing and modelling
37. Using satellite data to improve model estimates of crop yield
38. A formula for average foliage density
39. Light interception and radiative exchange in crop stands
40. Solar radiation and productivity in tropical ecosystems
41. A review on the theory of photons transport in leaf canopies
42. A simplex method for function minimization
43. Leaf area measurements based on hemispheric photographs and leaf-litter collection in a deciduous forest during autumn leaf-fall
44. A theoretical analysis of the frequency of gaps in plant stands
45. Effect of grouping of foliage on the with-stand and within-crown light regime: Comparison of random and grouping canopy models
46. Optimum gagging of thunderstorm rainfall in Southeastern America
47. Modeling bidirectional reflectance of multicomponent vegetation canopies
48. An analytical and computationally efficient reflectance model for leaf canopies
49. Grassland
50. Radiative transfer in plant communities
51. A tractable physical model of shortwave radiation interception by vegetative canopies
52. Light relations in plant communities
53. Canopy photosynthesis and crop growth rate of eight temperate forage grasses
54. Distribution of photosynthetically active radiation in the canopy of a doblolly pine plantation
55. Penetration of photosynthetically active radiation in corn canopies
56. Correcting LAI-2000 estimates for the clumping of needles in shoots of conifers
57. Leaf area index estimates obtained for clumped canopies using hemispherical photography
58. Light scattering by leaf layers with application to canopy reflectance modeling: The SAIL model
59. Inclined point quadrat
60. Estimation of foliage denseness and foliage angle by inclined point quadrats
61. Stand structure and light penetration. III. Analysis by point quadrats
62. Instrument for indirect measurement of canopy structure
63. Temperate grasslands