Projekter pr. år
Abstract
Gravity Recovery and Climate Experiment (GRACE) and its Follow-On mission (GRACE-FO) have become an indispensable tool in monitoring global mass variations. However, separating GRACE(-FO) signals into its individual Terrestrial Water Storage Changes (TWSC) and surface deformation contributors, i.e. Post-Glacial Rebound (PGR), is desirable for many hydro-climatic and geophysical applications. In this study, a hierarchical constrained Bayesian (ConBay) approach is formulated to apply GRACE(-FO) fields and the uplift rate measurements from the Global Navigation Satellite System (GNSS) stations to simultaneously estimate the contribution of TWSC and PGR. The proposed approach is formulated based on a hierarchical Markov Chain Monte Carlo optimisation algorithm within a dynamic multivariate state-space model, while accounting for the uncertainties of a priori information and observations. The numerical implementation is demonstrated over the Great Lakes area, covering 2003–2017, where the W3RA water balance and the ICE-5G(VM2) and ICE-6G-D(VM5a) GIA models are merged with GRACE and GNSS data. Validations are performed against independent measurements, which indicate that the average root-mean-squares-of-differences between the PGR estimates and independent measurements reduced by (Formula presented.) after merging observations with models through ConBay. The ConBay updates, introduced to the long-term trends, as well as the seasonal and inter-annual components, are found to be realistic.
Originalsprog | Engelsk |
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Tidsskrift | All Earth |
Vol/bind | 34 |
Udgave nummer | 1 |
Sider (fra-til) | 120-146 |
Antal sider | 27 |
ISSN | 2766-9645 |
DOI | |
Status | Udgivet - 22 jul. 2022 |
Fingeraftryk
Dyk ned i forskningsemnerne om 'A hierarchical Constrained Bayesian (ConBay) approach to jointly estimate water storage and Post-Glacial Rebound from GRACE(-FO) and GNSS data'. Sammen danner de et unikt fingeraftryk.Projekter
- 1 Igangværende
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DANSk-LSM: Developing efficient multi-sensor Data Assimilation frameworks for integrating Earth ObservatioN Satellite data into Land Surface Models (DANSk-LSM)
Forootan, E. (PI (principal investigator)), Schumacher, M. (CoI (co-investigator)), Yang, F. (Projektdeltager) & Retegui Schiettekatte, L. A. (Projektdeltager)
Uddannelses- og Forskningsministeriet
01/09/2022 → 31/08/2026
Projekter: Projekt › Forskning