Abstract
The spatial and temporal patterns of the forest background reflectance are critically important for retrieving the biophysical parameters of the forest canopy (overstory) and for ecosystem modeling. In this short communication paper, we retrieve the reflectance and seasonal changes of the forest background at 500. m resolution with the 8-day MODIS bidirectional reflectance distribution function (BRDF) model parameters product. For the first time, the satellite data derived results are directly validated with in situ measured seasonal reflectance trajectories of boreal forest understory layers. Our results illustrate the importance of taking into account the documented quality and limitations of the MODIS BRDF product.
| Original language | English |
|---|---|
| Pages (from-to) | 464-468 |
| Number of pages | 5 |
| Journal | Remote Sensing of Environment |
| Volume | 117 |
| DOIs | |
| Publication status | Published - 15 Feb 2012 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors wish to thank Anu Akujärvi and Titta Majasalmi for field work at the Hyytiälä test site. MODIS MCD43 BRDF product tiles were acquired from Land Processes Distributed Active Archive Center (LP DAAC). Funding was provided from the Academy of Finland , Emil Aaltonen Foundation , University of Helsinki Research and Postdoctoral Funds . We are grateful to three anonymous reviewers for helping to improve the manuscript. The detailed suggestions by the third reviewer were particularly appreciated.
Keywords
- Boreal
- MODIS BRDF
- Multi-angle remote sensing
- Understory