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First Retrievals of ASCAT-IB VOD (Vegetation Optical Depth) at Global Scale
- Source :
- IGARSS 2021-2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021-2021 IEEE International Geoscience and Remote Sensing Symposium, Jul 2021, Brussels, France. pp.6403-6406, ⟨10.1109/IGARSS47720.2021.9553244⟩, IGARSS
- Publication Year :
- 2021
-
Abstract
- Global and long-term vegetation optical depth (VOD) dataset are very useful to monitor the dynamics of the vegetation features, climate and environmental changes. In this study, the radar-based global ASCAT (Advanced SCATterometer) IB (INRAE-BORDEAUX) VOD was retrieved using a model which was recently calibrated over Africa. In order to assess the performance of IB VOD, the Saatchi biomass and three other VOD datasets (ASCAT V16, AMSR2 LPRM V5 and VODCA LPRM V6) derived from C-band observations were used in the comparison. The preliminary results show that IB VOD has a promising ability to predict biomass $(\mathrm{R}=0.74,\ \text{RMSE} =44.82\ \text{Mg}\ \text{ha}^{-1})$ , which is better than V16 VOD $(\mathrm{R}=0.64,\ \text{RMSE} =51.27\ \text{Mg} \text{ha}^{-1})$ and VODCA VOD $(\mathrm{R}=0.72,\ \text{RMSE} =47.14\ \text{Mg}\ \text{ha}^{-1})$ . Some retrieval issues for IB VOD were found in boreal regions (e.g., Eastern America, Russia). In the future, we will focus on improving our algorithm in those regions, and produce a global and long-term dataset.
- Subjects :
- Vegetation optical depth
010504 meteorology & atmospheric sciences
vegetation mapping
0211 other engineering and technologies
Scale (descriptive set theory)
02 engineering and technology
01 natural sciences
Combinatorics
remote sensing
vegetation
optical sensor
C-band
ComputingMilieux_MISCELLANEOUS
attenuation
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Mathematics
prediction algorithm
biomass
Order (ring theory)
15. Life on land
Prediction algorithms
ASCAT
13. Climate action
[SDE]Environmental Sciences
Vegetation optical Depth
Scatterometer
Biomedical optical imaging
Radar Measurement
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- IGARSS 2021-2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021-2021 IEEE International Geoscience and Remote Sensing Symposium, Jul 2021, Brussels, France. pp.6403-6406, ⟨10.1109/IGARSS47720.2021.9553244⟩, IGARSS
- Accession number :
- edsair.doi.dedup.....e5c29366544b213599e047d297d74051
- Full Text :
- https://doi.org/10.1109/IGARSS47720.2021.9553244⟩