Martin Charron
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View article: Application of High‐Order Direct Flux Reconstruction and Stiffness‐Resilient Time Integration to Simulations of Idealized Atmospheric Flows
Application of High‐Order Direct Flux Reconstruction and Stiffness‐Resilient Time Integration to Simulations of Idealized Atmospheric Flows Open
High‐order accurate discretizations in space and time are applied to the compressible Euler equations on the rotated cubed‐sphere grid. The proposed methodology combines the Direct Flux Reconstruction (DFR) method for spatial discretizatio…
View article: Reducing a Tropical Cyclone Weak-Intensity Bias in a Global Numerical Weather Prediction System
Reducing a Tropical Cyclone Weak-Intensity Bias in a Global Numerical Weather Prediction System Open
The operational Canadian Global Deterministic Prediction System suffers from a weak-intensity bias for simulated tropical cyclones. The presence of this bias is confirmed in progressively simplified experiments using a hierarchical system …
View article: Reducing a Tropical Cyclone Weak-Intensity Bias in a Global Numerical Weather Prediction System
Reducing a Tropical Cyclone Weak-Intensity Bias in a Global Numerical Weather Prediction System Open
The operational Canadian Global Deterministic Prediction System suffers from a weak-intensity bias for simulated tropical cyclones. The presence of this bias is confirmed in progressively simplified experiments using a hierarchical system …
View article: Supporting Dataset for "Reducing a tropical cyclone weak-intensity bias in a global numerical weather prediction system"
Supporting Dataset for "Reducing a tropical cyclone weak-intensity bias in a global numerical weather prediction system" Open
This archive supports the submission of "Reducing a tropical cyclone weak intensity bias in a global numerical weather prediction system" to Monthly Weather Review. It contains model configurations, the software used to create ensemble per…
View article: Supporting Dataset for "Reducing a tropical cyclone weak-intensity bias in a global numerical weather prediction system"
Supporting Dataset for "Reducing a tropical cyclone weak-intensity bias in a global numerical weather prediction system" Open
This archive supports the submission of "Reducing a tropical cyclone weak intensity bias in a global numerical weather prediction system" to Monthly Weather Review. It contains model configurations, the software used to create ensemble per…
View article: Using Stochastically Perturbed Parameterizations to Represent Model Uncertainty. Part I: Implementation and Parameter Sensitivity
Using Stochastically Perturbed Parameterizations to Represent Model Uncertainty. Part I: Implementation and Parameter Sensitivity Open
Accurately representing model-based sources of uncertainty is essential for the development of reliable ensemble prediction systems for NWP applications. Uncertainties in discretizations, algorithmic approximations, and diabatic and unreso…
View article: The role of renal contour change in the diagnosis of cortical scarring after urinary tract infection.
The role of renal contour change in the diagnosis of cortical scarring after urinary tract infection. Open
Urinary tract infections in children can lead to permanent renal scarring in approximately 15% of cases. Technetium-99m (99mTc)-dimercaptosuccinic acid (DMSA) scintigraphy is the gold standard for identifying renal scarring. Using data and…
View article: Addendum: Hidden symmetries, trivial conservation laws and Casimir invariants in geophysical fluid dynamics (2018 J. Phys. Commun. 2 115018)
Addendum: Hidden symmetries, trivial conservation laws and Casimir invariants in geophysical fluid dynamics (2018 J. Phys. Commun. 2 115018) Open
An extension is proposed to the internal symmetry transformations associated with mass, entropy and other Clebsch-related conservation in geophysical fluid dynamics. Those symmetry transformations were previously parameterized with an arbi…
View article: Addendum: Hidden symmetries, trivial conservation laws and Casimir\n invariants in geophysical fluid dynamics (2018 J. Phys. Commun. 2 115018)
Addendum: Hidden symmetries, trivial conservation laws and Casimir\n invariants in geophysical fluid dynamics (2018 J. Phys. Commun. 2 115018) Open
An extension is proposed to the internal symmetry transformations associated\nwith mass, entropy and other Clebsch-related conservation in geophysical fluid\ndynamics. Those symmetry transformations were previously parameterized with an\na…
View article: The Canadian Seasonal to Interannual Prediction System Version 2 (CanSIPSv2)
The Canadian Seasonal to Interannual Prediction System Version 2 (CanSIPSv2) Open
The second version of the Canadian Seasonal to Interannual Prediction System (CanSIPSv2) was implemented operationally at Environment and Climate Change Canada (ECCC) in July 2019. Like its predecessors, CanSIPSv2 applies a multimodel ense…
View article: Coupled Stratospheric Chemistry–Meteorology Data Assimilation. Part I: Physical Background and Coupled Modeling Aspects
Coupled Stratospheric Chemistry–Meteorology Data Assimilation. Part I: Physical Background and Coupled Modeling Aspects Open
A coupled stratospheric chemistry–meteorology model was developed by combining the Canadian operational weather prediction model Global Environmental Multiscale (GEM) with a comprehensive stratospheric photochemistry model from the Belgian…
View article: Coupled Stratospheric Chemistry-Meteorology Data Assimilation. Part I: Modeling Chemistry-Dynamics Interactions
Coupled Stratospheric Chemistry-Meteorology Data Assimilation. Part I: Modeling Chemistry-Dynamics Interactions Open
A coupled stratospheric chemistry-meteorology model was developed by combining the Canadian operational weather prediction model Global Environmental Multiscale (GEM) with a comprehensive stratospheric photochemistry model from the Belgian…
View article: Evaluation of the pulmonary radioaerosol mucociliary clearance scan as an adjunctive test for the diagnosis of primary ciliary dyskinesia in children
Evaluation of the pulmonary radioaerosol mucociliary clearance scan as an adjunctive test for the diagnosis of primary ciliary dyskinesia in children Open
Introduction The accuracy of primary ciliary dyskinesia (PCD) diagnosis has improved but no single test is diagnostic and some cases remain unsolved. Data regarding the accuracy of pulmonary radioaerosol mucociliary clearance scan (PRMCC) …
View article: Modernization of Atmospheric Physics Parameterization in Canadian NWP
Modernization of Atmospheric Physics Parameterization in Canadian NWP Open
Atmospheric physics is represented in numerical models by parameterizations that use resolved‐scale information to estimate the effects of physical processes on the atmospheric state. Over time, our understanding of these processes improve…
View article: Hidden symmetries, trivial conservation laws and Casimir invariants in geophysical fluid dynamics
Hidden symmetries, trivial conservation laws and Casimir invariants in geophysical fluid dynamics Open
From a manifestly invariant Lagrangian density based on Clebsch fields and suitable for geophysical fluid dynamics, non-trivial conservation laws and their associated symmetries are described in arbitrary coordinates via Noether's first th…
View article: On the triviality of potential vorticity conservation in geophysical fluid dynamics
On the triviality of potential vorticity conservation in geophysical fluid dynamics Open
Using a four-dimensional manifestly covariant formalism suitable for classical fluid dynamics, it is shown that potential vorticity conservation is an algebraic identity that takes the form of a trivial law of the second kind. Noether's fi…
View article: On the dissociation between potential vorticity conservation and symmetries
On the dissociation between potential vorticity conservation and symmetries Open
Using a four-dimensional manifestly covariant formalism suitable for classical fluid dynamics, it is shown that the conservation of potential vorticity is not associated with any symmetry of the equations of motion but is instead a trivial…
View article: On the dissociation between potential vorticity conservation and\n symmetries
On the dissociation between potential vorticity conservation and\n symmetries Open
Using a four-dimensional manifestly covariant formalism suitable for\nclassical fluid dynamics, it is shown that the conservation of potential\nvorticity is not associated with any symmetry of the equations of motion but is\ninstead a triv…
View article: An Optimally Stable and Accurate Second‐Order SSP Runge‐Kutta IMEX Scheme for Atmospheric Applications
An Optimally Stable and Accurate Second‐Order SSP Runge‐Kutta IMEX Scheme for Atmospheric Applications Open
The objective of this paper is to develop an optimized implicit‐explicit (IMEX) Runge‐Kutta scheme for atmospheric applications focusing on stability and accuracy. Following the common terminology, the proposed method is called IMEX‐SSP2(2…
View article: Non-trivial and trivial conservation laws in covariant formulations of geophysical fluid dynamics
Non-trivial and trivial conservation laws in covariant formulations of geophysical fluid dynamics Open
Using a manifestly invariant Lagrangian density based on Clebsch fields and suitable for geophysical fluid dynamics, the conservation of mass, entropy, momentum and energy, and the associated symmetries are investigated. In contrast, it is…
View article: Non-trivial and trivial conservation laws in covariant formulations of\n geophysical fluid dynamics
Non-trivial and trivial conservation laws in covariant formulations of\n geophysical fluid dynamics Open
Using a manifestly invariant Lagrangian density based on Clebsch fields and\nsuitable for geophysical fluid dynamics, the conservation of mass, entropy,\nmomentum and energy, and the associated symmetries are investigated. In\ncontrast, it…
View article: THORPEX Research and the Science of Prediction
THORPEX Research and the Science of Prediction Open
The Observing System Research and Predictability Experiment (THORPEX) was a 10-yr, international research program organized by the World Meteorological Organization’s World Weather Research Program. THORPEX was motivated by the need to acc…
View article: A Pilot Study of 18F-FLT PET/CT in Pediatric Lymphoma
A Pilot Study of 18F-FLT PET/CT in Pediatric Lymphoma Open
We performed an observational pilot study of 18F-FLT PET/CT in pediatric lymphoma. Eight patients with equivocal 18F-FDG PET/CT underwent imaging with 18F-FLT PET/CT. No immediate adverse reactions to 18F-FLT were observed. Compared to 18F…