A5065104535- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Meteorological Phenomena and Simulations
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Atmospheric Ozone and Climate
- Particle Accelerators and Free-Electron Lasers
- Atomic and Molecular Physics
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Geophysics and Gravity Measurements
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Methane Hydrates and Related Phenomena
- Quantum, superfluid, helium dynamics
- Radiation Therapy and Dosimetry
- Crystallography and Radiation Phenomena
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- Algorithms and Data Compression
- Advanced Numerical Methods in Computational Mathematics
NSF National Center for Atmospheric Research
2015-2024
NSF NCAR Climate and Global Dynamics Laboratory
2018-2024
Bjerknes Centre for Climate Research
2019
Tech-X Corporation (United States)
2011
University of Colorado Boulder
2009
Massachusetts Institute of Technology
1956-1986
University of California, Berkeley
1955-1970
Lawrence Berkeley National Laboratory
1963-1970
European Organization for Nuclear Research
1961
University of California System
1956-1958
Abstract It is the purpose of this paper to provide a comprehensive documentation new NCAR (National Center for Atmospheric Research) version spectral element (SE) dynamical core as part Community Earth System Model (CESM2.0) release. This differs from previous releases SE in several ways. Most notably hybrid sigma vertical coordinate based on dry air mass, condensates are dynamically active thermodynamic and momentum equations (also referred condensate loading), continuous motion conserve...
The study of the $I=0$ $K\ensuremath{-}N$ interaction at low energies using ${K}^{+}$-deuterium scattering has been extended on experimental side by inclusion elastic and inelastic noncharge-exchange scattering, theoretical a more detailed investigation final-state between two nucleons. new results for phase shifts exhibit same trends as those published before; however, $s$-wave data are accurate. It is shown that very energies, may be interpreted due to small length...
ABSTRACT To explore the various couplings across space and time between ecosystems in a consistent manner, atmospheric modeling is moving away from fractured limited-scale strategy of past toward unification range scales inherent Earth system. This paper describes forward-looking Multi-Scale Infrastructure for Chemistry Aerosols (MUSICA), which intended to become next-generation community infrastructure research involving chemistry aerosols. MUSICA will be developed collaboratively by...
Thirty-five antiproton stars have been found in an emulsion stack exposed to a 700-Mev/c negative particle beam. Of these antiprotons, 21 annihilate flight and three give large-angle scatters ($\ensuremath{\theta}>15\ifmmode^\circ\else\textdegree\fi{}$, ${T}_{\overline{p}}>50$ Mev), while 14 at rest. From the interactions we obtain total cross section for interaction: $\frac{{\ensuremath{\sigma}}_{\overline{p}}}{{\ensuremath{\sigma}}_{0}}=2.9\ifmmode\pm\else\textpm\fi{}0.7$, where...
Abstract. Most global climate models parameterize separate cloud types using parameterizations. This approach has several disadvantages, including obscure interactions between parameterizations and inaccurate triggering of cumulus Alternatively, a unified parameterization uses one equation set to represent all types. Such include stratiform liquid ice cloud, shallow convective deep cloud. Vital the success is general interface clouds microphysics. One such involves drawing Monte Carlo...
Abstract This paper describes the implementation of a coarser‐resolution physics grid into Community Atmosphere Model (CAM), containing fewer columns than dynamics grid. The dry is represented by spectral element dynamical core, and tracer transport computed using Conservative Semi‐Lagrangian Finite Volume Method (CAM‐SE‐CSLAM). Algorithms are presented that map fields between grids while maintaining numerical properties ideal for atmospheric simulations such as mass conservation mixing...
Abstract A new version of NCAR Whole Atmosphere Community Climate Model with thermosphere/ionosphere extension (WACCM‐X) has been developed. The main feature this is the species‐dependent spectral element (SE) dynamical core solved on a cubed sphere grid, eliminating polar singularity and enabling simulations at high‐resolutions. Molecular viscosity diffusion in horizontal direction are also included. Conservative Semi‐Lagrangian Multi‐Tracer Transport Scheme (CSLAM) employed for species...
Study of 1.96-BeV/c ${K}^{+}p$ interactions in the Brookhaven 20-in. liquid-hydrogen bubble chamber has yielded a measurement elastic-scattering cross section $\ensuremath{\sigma}=7.5\ifmmode\pm\else\textpm\fi{}0.7$ mb. A fit to differential versus momentum transfer form ${\ensuremath{\sigma}}_{0}{e}^{\ensuremath{-}\ensuremath{\alpha}t}$ gives, for interval $0.01 {(\frac{\mathrm{BeV}}{c})}^{2}<t<0.60 {(\frac{\mathrm{BeV}}{c})}^{2}$,...
Atmospheric modeling with element-based high-order Galerkin methods presents a unique challenge to the conventional physics–dynamics coupling paradigm, due highly irregular distribution of nodes within an element and distinct numerical characteristics method. The procedure is evaluate physical parameterizations ( physics) on dynamical core grid. Evaluating physics at nodal points exacerbates noise from method, enabling amplifying local extrema boundaries. Grid imprinting may be substantially...
A large nuclear emulsion stack was exposed in the magnetically analyzed beam of ${K}^{+}$ particles, at Berkeley Bevatron. The secondaries stopped $K$-mesons have been analyzed, and examples all known modes decay: ${K}_{\ensuremath{\mu}2}$, ${K}_{\ensuremath{\pi}2}$, ${K}_{e3}$, ${K}_{\ensuremath{\mu}3}$, $\ensuremath{\tau}$, ${\ensuremath{\tau}}^{\ensuremath{'}}$ identified. decay processes mesons confirmed, a possible scheme for ${K}_{\ensuremath{\mu}3}$ has considered. masses particles...
In order to help students overcome documented difficulties learning quantum mechanics (QM) concepts, we have transformed our upper‐division QM I course using principles of theory and active engagement. Key components this process include establishing goals developing a valid, reliable conceptual assessment tool measure the extent which achieve these goals. The were developed with broad faculty input, serve as basis for design tool. development has included significant input feedback,...
Received 16 September 1965DOI:https://doi.org/10.1103/PhysRevLett.15.737©1965 American Physical Society
The existence of antiprotons has recently been demonstrated at the Berkeley Bevatron by a counter experiment. were found among momentum-analyzed (1190 Mev/c) negative particles emitted copper target bombarded 6.2-Bev protons. Concurrently with experiment, stacks nuclear emulsions exposed in beam adjusted to 1090 Mev/c an experiment designed observe properties when coming rest. This required 132 g/cm2 absorber slow down sufficiently stop them emulsion stack. Only one antiproton was which...
An algorithm to consistently couple a conservative semi-Lagrangian finite-volume transport scheme with spectral element (SE) dynamical core is presented. The the Conservative Semi-Lagrangian Multitracer (CSLAM), and SE National Center for Atmospheric Research (NCAR)’s Community Atmosphere Model–Spectral Elements (CAM-SE). primary motivation coupling CSLAM CAM-SE accelerate tracer multitracer applications. result an inherently mass-conservative, shape-preserving, consistent (for constant...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSome Effects of Temperature, Phase and Nature Chemical Species on Halogen Atom Reactions Initiated by Radiative Neutron Capture Isomeric Transition1S. Goldhaber, R. S. H. Chiang, J. E. WillardCite this: Am. Chem. Soc. 1951, 73, 5, 2271–2275Publication Date (Print):May 1, 1951Publication History Published online1 May 2002Published inissue 1 1951https://pubs.acs.org/doi/10.1021/ja01149a103https://doi.org/10.1021/ja01149a103research-articleACS...
Abstract. We implement the GEOS-Chem chemistry module as a chemical mechanism in version 2 of Community Earth System Model (CESM). Our implementation allows state-of-the-science to be used with identical emissions, meteorology, and climate feedbacks CAM-chem within CESM. use coupling interfaces allow operate almost unchanged Aerosols are converted at each time step between bulk representation size-resolved CESM's Modal Aerosol (MAM4). Land-type information needed for dry-deposition...
${K}^{+}p$ inelastic final states in the region of 1250-MeV/c Cool peak are examined for evidence resonant behavior. The dominant $K{N}^{*}$ state is found to be about equally divided between ${P}_{\frac{1}{2}}$ and ${P}_{\frac{3}{2}}$ states, with no rapid phase variation 960 1370 MeV/c.