Searched for: subject%3A%22Data%255C%2Bassimilation%22
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Pang, M. (author), Jin, J. (author), Segers, A.J. (author), Huiya, J. (author), Fang, L. (author), Lin, H.X. (author), Liao, H. (author)
Super dust storms re-occurred over East Asia in 2021 spring and casted great health damages and property losses. It is essential to achieve an accurate dust forecast to reduce the damage for early warning. The forecasting system fundamentally relies on a numerical model which can forecast the full evolution of dust storms. However, large...
article 2023
document
Xiao, C. (author), Lin, H.-X. (author), Leeuwenburgh, O. (author), Heemink, A. (author)
History matching can play a key role in improving geological characterization and reducing the uncertainty of reservoir model predictions. Application of reservoir history matching is restricted by the huge computational cost by amongst others the many runs of the full model. Surrogate models with a reduced complexity are therefore used to...
article 2022
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Vijn, A. (author), Peet, B.J. (author), Schaaphok, M. (author), Lepelaars, E. (author), Heemink, A. (author)
This paper presents a hybrid model to estimate the magnetic behaviour of a ferromagnetic structure. The mathematical-physical model has been developed using the Method of Moments combined with a hysteresis model. The mathematical model was derived by a linearisation of the hysteresis curve. The initial magnetic state of a ferromagnetic object is...
article 2022
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Candela, T.G.G. (author), Chitu, A.G. (author), Peters, E. (author), Pluymaekers, M.P.D. (author), Hegen, D. (author), Koster, K. (author), Fokker, P.A. (author)
Surface movement can be induced by many human subsurface activities: production of natural gas, geothermal heat extraction, ground water extraction, phreatic groundwater level lowering, storage of natural gas and CO2. In this manuscript, we focus on subsidence caused by gas production. While geological interpretations, seismic campaigns and flow...
article 2022
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Kaminski, T. (author), Scholze, M. (author), Rayner, P. (author), Houweling, S. (author), Vossbeck, M. (author), Silver, J. (author), Lama, S. (author), Buchwitz, M. (author), Reuter, M. (author), Knorr, W. (author), Chen, H.W. (author), Kuhlmann, G. (author), Brunner, D. (author), Dellaert, S.N.C. (author), Denier van der Gon, H.A.C. (author), Super, I. (author), Loscher, A. (author), Meijer, Y. (author)
The European Copernicus programme plans to install a constellation of multiple polar orbiting satellites (Copernicus Anthropogenic CO2 Monitoring Mission, CO2M mission) for observing atmospheric CO2 content with the aim to estimate fossil fuel CO2 emissions. We explore the impact of potential CO2M observations of column-averaged CO2 (XCO2),...
article 2022
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Candela, T. (author), Goncalves Machado, C. (author), Leeuwenburgh, O. (author), ter Heege, J.H. (author)
A newly developed modelling framework is presented which specifically focusses on the central Oklahoma case and the high-volume injection of wastewater, which led to a surge of induced seismicity. However, the modelling framework is versatile enough to be applied to any anthropogenic subsurface activities and should be seen as a good practice to...
article 2022
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Timmermans, R.M.A. (author), Segers, A.J. (author), Dammers, E. (author), Jorba, O. (author), Bowdalo, D. (author), Fagerli, H. (author), Valdebenito, A. (author), Colette, A. (author), Descombes, G. (author), Kouznetsov, R. (author), Uppstu, A. (author), Schaap. M., (author)
Within Copernicus Atmosphere Monitoring Service (CAMS) an ensemble of 9 chemistry transport models provides daily analyses and forecasts, as well as annual reanalyses over Europe. The CAMS_61 project was developed to provide development plans, guidelines and tools for the upgrade of the models within this regional air quality service. In this...
conference paper 2022
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Skoulidou, I (author), Koukouli, M.E. (author), Segers, A.J. (author), Manders-Groot, A.M.M. (author), Balis, D. (author), Stavrakou, T. (author), van Geffen, J. (author), Eskes, H. (author)
In this work, we investigate the ability of a data assimilation technique and space-borne observations to quantify and monitor changes in nitrogen oxides (NOx) emissions over North-Western Greece for the summers of 2018 and 2019. In this region, four lignite-burning power plants are located. The data assimilation technique, based on the Ensemble...
article 2021
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Lopez-Restrepo, S. (author), Nino-Ruiz, E.D. (author), Guzman-Reyes, L.G. (author), Yarce, A. (author), Quintero, O.L. (author), Pinel, N. (author), Segers, A.J. (author), Heemink, A.W. (author)
In this paper, we propose an efficient and practical implementation of the ensemble Kalman filter via shrinkage covariancematrix estimation. Our filter implementation combines information brought by an ensemble of model realizations, and thatbased on our prior knowledge about the dynamical system of interest. We perform the combination of both...
article 2021
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Xiao, C. (author), Leeuwenburgh, O. (author), Lin, H.X. (author), Heemink, A.W. (author)
article 2021
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Jin, J. (author), Segers, A. (author), Lin, H.X. (author), Henzing, B. (author), Wang, X. (author), Heemink, A. (author), Liao, H. (author)
When calibrating simulations of dust clouds, both the intensity and the position are important. Intensity er rors arise mainly from uncertain emission and sedimenta tion strengths, while position errors are attributed either to imperfect emission timing or to uncertainties in the trans port. Though many studies have been conducted on the cal...
article 2021
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Lopez-Restrepo, S. (author), Yarce, A. (author), Pinel, N. (author), Quintero, O.L. (author), Segers, A. (author), Heemink, A.W. (author)
A data assimilation system for the LOTOS-EUROS chemical transport model has been implemented to improve the simulation and forecast of PM10 and PM2.5 in a densely populated urban valley of the tropical Andes. The Aburrá Valley in Colombia was used as a case study, given data availability and current environmental issues related to population...
article 2020
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Bekesi, E. (author), Struijk, M. (author), Bonte, D. (author), Veldkamp, J.G. (author), Limburger, J. (author), Fokker, P.A. (author), Vrijlandt, M.A.W. (author), van Wees, J.D. (author)
The subsurface temperature is one of the most crucial parameters for the development of geothermal energy. Physics-based temperature models calibrated with temperature data are especially relevant for deep geothermal exploration. We present an updated high-resolution 3D thermal model of the onshore Netherlands. We constructed the model in 7...
article 2020
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Jin, J. (author), Segers, A.J. (author), Heemink, A. (author), Yoshida, M. (author), Han, W. (author), Lin, H.X. (author)
Aerosol optical depths (AODs) from the new Himawari-8 satellite instrument have been assimilated in a dust simulation model over East Asia. This advanced geostationary instrument is capable of monitoring the East Asian dust storms which usually have great spatial and temporal variability. The quality of the data has been verified through a...
article 2019
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Peet, B.J.A. (author)
conference paper 2019
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Xiao, C. (author), Leeuwenburgh, O. (author), Lin, H.X. (author), Heemink, A. (author)
article 2019
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Loh, K.K.L. (author), Shoeibi Omrani, P. (author), van der Linden, R.J.P. (author)
The forecasting of gas production from mature gas wells, due to their complex end-of-life behaviour, is challenging and often associated with uncertainties (both measurements and modelling uncertainties). Yet, having good forecasts are crucial for operational decision making. In this paper, we present a purely black-box based approach, which...
conference paper 2018
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Fu, G. (author), Xiang Lin, H. (author), Heemink, A. (author), Lu, S. (author), Segers, A. (author), van Velzen, N. (author), Lu, T. (author), Xu, S. (author)
In this study, we investigate a strategy to accelerate the data assimilation (DA) algorithm. Based on evaluations of the computational time, the analysis step of the assimilation turns out to be the most expensive part. After a study of the characteristics of the ensemble ash state, we propose a mask-state algorithm which records the sparsity...
article 2017
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Lu, S. (author), Heemink, A. (author), Lin, H.X. (author), Segers, A. (author), Fu, G. (author)
Remote sensing, as a powerful tool for monitoring atmospheric phenomena, has been playing an increasingly important role in inverse modeling. Remote sensing instruments measure quantities that often combine several state variables as one. This creates very strong correlations between the state variables that share the same observation variable....
article 2017
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Snijders, B. (author), van der Wal, L.F. (author), de Goeij, B.T.G. (author), Jansen, R. (author), Toet, P. (author), Oosterling, J.A.J. (author)
Driven by technology developments triggering end user’s attention, the market for nano-and micro satellites is developing rapidly. At present there is a strong focus on 2D imaging of the Earth’s surface, with limited possibilities to obtain high resolution spectral information. More demanding applications, such as monitoring trace gases,...
conference paper 2017
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