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- W1987157055 abstract "The diurnal and seasonal emission course from plants is controlled by light and temperature. The pattern of light incident on a surface changes with time and space, which is most obvious in cast shadows. A complex GIS-based solar radiation model (SORAM) which is not restricted to certain test sites was developed. It is used for the first time to scale up biogenic emissions. Our main interest is to evaluate the effects on the amount of biogenic volatile organic compounds emitted caused by the 3-dimensional surface of either a canopy stand or a complex terrain. Therefore a digital elevation model represents the canopy surface of the St. Quercio pine/oak forest (Castelporziano, Italy). Temperature values are linked to the radiation output. This enables us to correct emission factors for light and temperature by using Tingey's (1980) and Guenther's (1993) emission algorithms. The methods are described and results presented for 26 May 1994 and 3 August 1994. The seasonality in the amount and composition of emitted compounds is clearly shown for P. pinea. Representing the canopy stand by a pseudo-3-dimensional surface instead of a surface with a constant height value reduces emission fluxes from Q. ilex by 40%. The “global” emission flux of the test site decreases by 20%. The results are compared with values derived from different measurement techniques and up-scaling methods. Suggestions are made to overcome the limitations of the pseudo-3-dimensional presentation of the canopy stand." @default.
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- W1987157055 date "1999-01-01" @default.
- W1987157055 modified "2023-09-27" @default.
- W1987157055 title "A temporal-spatial solar radiation model to improve scaling of biogenic emissions from a sparse Mediterranean pine/oak forest" @default.
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- W1987157055 doi "https://doi.org/10.1016/s1464-1909(99)00064-7" @default.
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