C-band scattering simulation of a Scots pine shoot
| Autor: | Kari Lumme, Antti Penttilä, T. Manninen |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
010504 meteorology & atmospheric sciences
biology Scattering C band Crown (botany) Taiga 0211 other engineering and technologies General Engineering Scots pine General Physics and Astronomy 02 engineering and technology 15. Life on land Discrete dipole approximation biology.organism_classification Atmospheric sciences 01 natural sciences Shoot Quantitative Biology::Populations and Evolution Leaf area index Physics::Atmospheric and Oceanic Physics 021101 geological & geomatics engineering 0105 earth and related environmental sciences Mathematics |
| Zdroj: | Waves in Random and Complex Media. 17:85-98 |
| ISSN: | 1745-5049 1745-5030 |
| DOI: | 10.1080/17455030601011597 |
| Popis: | Scots pine (Pinus sylvestris L.) has the widest distribution of any pine and is one of the most important timber trees in Europe and one of the main species of boreal forest, which have an important role in climate change studies. The leaf area index (LAI) is one of the key input parameters for the climate change models. Recently a relationship between C-band backscattering and the LAI has been detected for Scots pine. To understand the C-band microwave characteristics of Scots pine shoots the backscattering is simulated using the so-called discrete dipole approximation (DDA), which is the only possible, nearly exact method for this problem. The backscattering of the shoot is dominated by the needles. The VV/HH backscattering ratio of closely spaced parallel and perpendicular shoots averages to that of a single shoot. For a simulated whole Scots pine crown the VV/HH backscattering ratio is related to the total orientation distribution of the needles. The variation range of the VV/HH backscattering ratio w... |
| Databáze: | OpenAIRE |
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