A5052191883- Soil Moisture and Remote Sensing
- Meteorological Phenomena and Simulations
- Soil and Unsaturated Flow
- Hydrology and Watershed Management Studies
- Reservoir Engineering and Simulation Methods
- Plant Water Relations and Carbon Dynamics
- Precipitation Measurement and Analysis
- Climate change and permafrost
- Remote Sensing in Agriculture
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Tree-ring climate responses
- Landslides and related hazards
Delft University of Technology
2022-2024
A Deep Neural Network (DNN) is used to estimate the Advanced Scatterometer (ASCAT) C-band microwave normalized backscatter (σ40o), slope (σ′) and curvature (σ″) over France. The Interactions between Soil, Biosphere Atmosphere (ISBA) land surface model (LSM) produce variables (LSVs) that are input DNN. DNN trained simulate σ40o, σ′ σ″ from 2007 2016. predictive skill of evaluated during an independent validation period 2017 2019. Normalized sensitivity coefficients (NSCs) computed study ASCAT...
ASCAT normalized backscatter (σ40o) and slope (σ′) contain valuable information about soil moisture vegetation. While σ40o has been assimilated to constrain moisture, sometimes together with Leaf Area Index (LAI), this study is the first assimilate σ′ directly vegetation states. Here, we into ISBA-A-gs LSM using Simplified Extended Kalman Filter (SEKF) a Deep Neural Network (DNN) as observation operator. The performances of data assimilation (DA) open loop (OL) are evaluated against in-situ...
ASCAT normalized backscatter and slope are jointly assimilating into the ISBA-A-gs land surface model (LSM) to constrain plant water dynamics processes. An Extended Kalman filter is used as data assimilation (DA) algorithm with a trained Deep Neural Network observation operator link states observations (Shan et al., 2022). DA open loop (OL) runs performed on grid points (GPIs) containing ISMN stations in Europe validated using from 2017 2019. Performances of OL evaluated against in-situ soil...
<p>Previous studies have shown that Advanced Scatterometer (ASCAT) C-band microwave normalized backscatter (σ<sub>40</sub><sup>o</sup>), slope (σ') and curvature (σ'') provide a valuable insight into vegetation water dynamics. However, currently there are limited focusing on the observation operator linking land surface models to ASCAT observables allow for their...