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| Titel |
IPR 1.0: an efficient method for calculating solar radiation absorbed by individual plants in sparse heterogeneous woody plant communities |
| VerfasserIn |
Y. Zhang, W. Chen, J. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 4 ; Nr. 7, no. 4 (2014-07-10), S.1357-1376 |
| Datensatznummer |
250115657
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| Publikation (Nr.) |
 copernicus.org/gmd-7-1357-2014.pdf |
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| Zusammenfassung |
| Climate change may alter the spatial distribution, composition, structure
and functions of plant communities. Transitional zones between biomes, or
ecotones, are particularly sensitive to climate change. Ecotones are usually
heterogeneous with sparse trees. The dynamics of ecotones are mainly
determined by the growth and competition of individual plants in the
communities. Therefore it is necessary to calculate the solar radiation absorbed
by individual plants in order to understand and predict their responses to
climate change. In this study, we developed an individual plant radiation
model, IPR (version 1.0), to calculate solar radiation absorbed by
individual plants in sparse heterogeneous woody plant communities. The model
is developed based on geometrical optical relationships assuming that crowns of
woody plants are rectangular boxes with uniform leaf area density. The model
calculates the fractions of sunlit and shaded leaf classes and the solar
radiation absorbed by each class, including direct radiation from the sun,
diffuse radiation from the sky, and scattered radiation from the plant
community. The solar radiation received on the ground is also calculated. We
tested the model by comparing with the results of random distribution of
plants. The tests show that the model results are very close to the averages
of the random distributions. This model is efficient in computation, and can
be included in vegetation models to simulate long-term transient responses
of plant communities to climate change. The code and a user's manual are
provided as Supplement of the paper. |
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