- Title
- Multi-mission satellite remote sensing data for improving land hydrological models via data assimilation
- Creator
- Khaki, M; Hendricks Franssen, H. J.; Han, S. C.
- Relation
- Scientific Reports Vol. 10, Issue 1, no. 18791
- Publisher Link
- http://dx.doi.org/10.1038/s41598-020-75710-5
- Publisher
- Nature Publishing Group
- Resource Type
- journal article
- Date
- 2020
- Description
- Satellite remote sensing offers valuable tools to study Earth and hydrological processes and improve land surface models. This is essential to improve the quality of model predictions, which are affected by various factors such as erroneous input data, the uncertainty of model forcings, and parameter uncertainties. Abundant datasets from multi-mission satellite remote sensing during recent years have provided an opportunity to improve not only the model estimates but also model parameters through a parameter estimation process. This study utilises multiple datasets from satellite remote sensing including soil moisture from Soil Moisture and Ocean Salinity Mission and Advanced Microwave Scanning Radiometer Earth Observing System, terrestrial water storage from the Gravity Recovery And Climate Experiment, and leaf area index from Advanced Very-High-Resolution Radiometer to estimate model parameters. This is done using the recently proposed assimilation method, unsupervised weak constrained ensemble Kalman filter (UWCEnKF). UWCEnKF applies a dual scheme to separately update the state and parameters using two interactive EnKF filters followed by a water balance constraint enforcement. The performance of multivariate data assimilation is evaluated against various independent data over different time periods over two different basins including the Murray-Darling and Mississippi basins. Results indicate that simultaneous assimilation of multiple satellite products combined with parameter estimation strongly improves model predictions compared with single satellite products and/or state estimation alone. This improvement is achieved not only during the parameter estimation period (~ 32% groundwater RMSE reduction and soil moisture correlation increase from ~ 0.66 to ~ 0.85) but also during the forecast period (~ 14% groundwater RMSE reduction and soil moisture correlation increase from ~ 0.69 to ~ 0.78) due to the effective impacts of the approach on both state and parameters.
- Subject
- Satellite remote sensing; Earth; hydrological processes; land surface models
- Identifier
- http://hdl.handle.net/1959.13/1429434
- Identifier
- uon:38712
- Identifier
- ISSN:2045-2322
- Rights
- © The Author(s) 2020. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creat iveco mmons .org/licen ses/by/4.0/.
- Language
- eng
- Full Text
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