A5019587421- Meteorological Phenomena and Simulations
- Cryospheric studies and observations
- Landslides and related hazards
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Climate change and permafrost
- Distributed and Parallel Computing Systems
- Geophysics and Gravity Measurements
- Laser-Matter Interactions and Applications
- Computational Fluid Dynamics and Aerodynamics
- Laser-Plasma Interactions and Diagnostics
- Fluid Dynamics and Turbulent Flows
- Laser-induced spectroscopy and plasma
- Scientific Research and Discoveries
- Arctic and Antarctic ice dynamics
- Parallel Computing and Optimization Techniques
- Lattice Boltzmann Simulation Studies
- Winter Sports Injuries and Performance
- Elasticity and Material Modeling
- Methane Hydrates and Related Phenomena
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Advanced Radiotherapy Techniques
- Advanced X-ray Imaging Techniques
- Solar and Space Plasma Dynamics
Sandia National Laboratories
2018-2025
Sandia National Laboratories California
2018-2021
Florida State University
2015-2018
Emory University
2014-2015
Politecnico di Milano
2009-2010
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2009-2010
Institut Rayonnement-Matière de Saclay
2009
Ions can be effectively accelerated during the interaction of an ultra-intense ultra-short laser pulse irradiating a thin solid target via so-called normal sheath acceleration (TNSA) mechanism. One pivotal questions at this stage research is how to predict properties ions, both from fundamental point view and in light foreseen applications. In context, it desirable have simple but reliable description used extrapolate current results future regimes, which will made available near future,...
Abstract. We introduce MPAS-Albany Land Ice (MALI) v6.0, a new variable-resolution land ice model that uses unstructured Voronoi grids on plane or sphere. MALI is built using the Model for Prediction Across Scales (MPAS) framework developing Earth system components and Albany multi-physics code base solution of coupled systems partial differential equations, which itself makes use Trilinos solver libraries. includes three-dimensional first-order momentum balance (Blatter–Pattyn) by linking...
Abstract This paper describes the first implementation of Δ x = 3.25 km version Energy Exascale Earth System Model (E3SM) global atmosphere model and its behavior in a 40‐day prescribed‐sea‐surface‐temperature simulation (January 20 through February 28, 2020). was performed as part DYnamics Atmospheric general circulation Modeled On Non‐hydrostatic Domains (DYAMOND) Phase 2 intercomparison. Effective resolution is found to be horizontal dynamics grid despite using coarser for physical...
Summary We consider a Leray model with deconvolution‐based indicator function for the simulation of incompressible fluid flow at moderately large Reynolds number (in range few thousands) under‐resolved meshes. For implementation model, we adopt three‐step algorithm called evolve–filter–relax that requires (i) solution Navier–Stokes problem, (ii) Stokes‐like problem to filter velocity field, and (iii) final relaxation step. take advantage reformulation as an operator‐splitting method analyze...
Scientific computing has progressively become an important tool for research in cardiovascular diseases. The role of quantitative analyses based on numerical simulations moved from 'proofs concept' to patient-specific investigations, thanks a strong integration between imaging and computational tools. However, beyond individual geometries, models require the knowledge parameters that are barely retrieved measurements, especially vivo. For this reason, recently mathematics considered data...
Abstract. We present an architecture-portable and performant implementation of the atmospheric dynamical core (High-Order Methods Modeling Environment, HOMME) Energy Exascale Earth System Model (E3SM). The original Fortran is highly scalable on conventional architectures using Message Passing Interface (MPI) Open MultiProcessor (OpenMP) programming models. rewrite model in C++ use Kokkos library to express on-node parallelism a largely architecture-independent implementation. provides...
Abstract The new generation of heterogeneous CPU/GPU computer systems offer much greater computational performance but are not yet widely used for climate modeling. One reason this is that traditional models were written before GPUs available and would require an extensive overhaul to run on these machines. In addition, even conventional “high–resolution” simulations don't currently provide enough parallel work keep busy, so the benefits such be limited types scientists accustomed to. vision...
High-resolution simulations of polar ice sheets play a crucial role in the ongoing effort to develop more accurate and reliable Earth system models for probabilistic sea-level projections. These often require massive amount memory computation from large supercomputing clusters provide sufficient accuracy resolution; therefore, it has become essential ensure performance on these platforms. Many today’s supercomputers contain diverse set computing architectures specific programming interfaces...
LifeV is a library for the finite element (FE) solution of partial differential equations in one, two, and three dimensions. It written C++ designed to run on diverse parallel architectures, including cloud high performance computing facilities. In spite its academic research nature, meaning development testing new methods, one distinguishing feature use real world problems it intended provide tool many engineering applications. has been actually used computational hemodynamics, cardiac...
We present an effort to port the nonhydrostatic atmosphere dynamical core of Energy Exascale Earth System Model (E3SM) efficiently run on a variety architectures, including conventional CPU, many-core and GPU. specifically target cloud-resolving resolutions 3 km 1 km. To express on-node parallelism we use C++ library Kokkos, which allows us achieve performance portable code in largely architecture-independent way. Our implementation is at least as fast original Fortran IBM Power9 Intel...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Advances Modeling Systems (JAMES). Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing an older version [v1]Go to new versionConvection-Permitting Simulations with the E3SM Global Atmosphere ModelAuthorsPeter MartinCaldwelliDChristopher RyutaroTeraiiDBenjamin RHillmanNoel...
to GPUs. We present performance data for the original and new implementations on multiple platforms, up 5400 compute nodes, study several aspects of single- multi-node characteristics implementation conventional CPU (e.g., Intel Xeon), many core Xeon Phi Knights Landing),and Nvidia V100 GPU.
This paper presents the development of a new entropy-based feature selection method for identifying and quantifying impacts. Here, impacts are defined as statistically significant differences in spatio-temporal fields when comparing datasets with without an external forcing Earth system models. Temporal is performed by first computing cross-fuzzy entropy to quantify similarity patterns between two then applying changepoint detection identify regions constant entropy. The used capture...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Advances Modeling Systems (JAMES). Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v2]Convection-Permitting Simulations with E3SM Global Atmosphere ModelAuthorsPeter MartinCaldwelliDChristopher RyutaroTeraiiDBenjamin RHillmanNoel D.KeeniDPeter...
In this work we experimentally and theoretically report on the energy cutoff scaling law for proton generation from bulk targets over one decade of intensity ranging 5×1018 to 5×1019 W/cm2 in ultra‐short pulse duration regime (25 fs). Assuming same experimental conditions that physics does not change higher intensities, extrapolate 100 MeV could be reached using 500 TW ultra‐high‐contrast‐ultra short laser pulses.
The new generation of heterogeneous CPU/GPU computer systems offer much greater computational performance but are not yet widely used for climate modeling. One reason this is that traditional models were written before GPUs available and would require an extensive overhaul to run on these machines. In addition, even conventional “high–resolution’ simulations don’t provide enough parallel work keep busy, so the benefits such be limited types scientists accustomed to. vision Simple...
We propose an approach for characterizing source-impact pathways, the interactions of a set variables in space-time due to external forcing, climate models using in-situ analyses that circumvent computationally expensive read/write operations. This makes use lightweight open-source software library we developed known as CLDERA-Tools. describe how CLDERA-Tools is linked with U.S. Department Energy's Energy Exascale Earth System Model (E3SM) minimally invasive way extraction quantities...
Ions can be effectively accelerated during the interaction of an ultra‐intense ultra‐short laser pulse irradiating a thin solid target via so‐called Target Normal Sheath Acceleration (TNSA) mechanism. One crucial issues at this stage research is how to predict properties ions, both from fundamental point view and in light foreseen applications. Thus, it desirable have simple but reliable description, used extrapolate current results regimes likely reached near future, thanks developments...