Zobrazeno 1 - 10
of 26
pro vyhledávání: '"O. Guba"'
Autor:
A. S. Donahue, P. M. Caldwell, L. Bertagna, H. Beydoun, P. A. Bogenschutz, A. M. Bradley, T. C. Clevenger, J. Foucar, C. Golaz, O. Guba, W. Hannah, B. R. Hillman, J. N. Johnson, N. Keen, W. Lin, B. Singh, S. Sreepathi, M. A. Taylor, J. Tian, C. R. Terai, P. A. Ullrich, X. Yuan, Y. Zhang
Publikováno v:
Journal of Advances in Modeling Earth Systems, Vol 16, Iss 7, Pp n/a-n/a (2024)
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 for this is that traditional climate models were written before GPUs were
Externí odkaz:
https://doaj.org/article/2c744bdea7a74ab8a4f9aef22b16b7a0
Publikováno v:
Geoscientific Model Development, Vol 17, Pp 1429-1442 (2024)
Motivated by reducing errors in the energy budget related to enthalpy fluxes within the Energy Exascale Earth System Model (E3SM), we study several physics–dynamics coupling approaches. Using idealized physics, a moist rising bubble test case, and
Externí odkaz:
https://doaj.org/article/df0576288f374f17970f55c8fbdc8fdc
Autor:
Q. Tang, J.-C. Golaz, L. P. Van Roekel, M. A. Taylor, W. Lin, B. R. Hillman, P. A. Ullrich, A. M. Bradley, O. Guba, J. D. Wolfe, T. Zhou, K. Zhang, X. Zheng, Y. Zhang, M. Zhang, M. Wu, H. Wang, C. Tao, B. Singh, A. M. Rhoades, Y. Qin, H.-Y. Li, Y. Feng, C. Zhang, C. S. Zender, S. Xie, E. L. Roesler, A. F. Roberts, A. Mametjanov, M. E. Maltrud, N. D. Keen, R. L. Jacob, C. Jablonowski, O. K. Hughes, R. M. Forsyth, A. V. Di Vittorio, P. M. Caldwell, G. Bisht, R. B. McCoy, L. R. Leung, D. C. Bader
Publikováno v:
Geoscientific Model Development, Vol 16, Pp 3953-3995 (2023)
This paper provides an overview of the United States (US) Department of Energy's (DOE's) Energy Exascale Earth System Model version 2 (E3SMv2) fully coupled regionally refined model (RRM) and documents the overall atmosphere, land, and river results
Externí odkaz:
https://doaj.org/article/c74f48bbdf6b4f03a5dd135d9bc43a71
Publikováno v:
Geoscientific Model Development, Vol 15, Pp 6285-6310 (2022)
Advection of trace species, or tracers, also called tracer transport, in models of the atmosphere and other physical domains is an important and potentially computationally expensive part of a model's dynamical core. Semi-Lagrangian (SL) advection me
Externí odkaz:
https://doaj.org/article/a635db13f99e421291a8b19cdb585ab6
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 6467-6480 (2020)
We present a new evaluation framework for implicit and explicit (IMEX) Runge–Kutta time-stepping schemes. The new framework uses a linearized nonhydrostatic system of normal modes. We utilize the framework to investigate the stability of IMEX metho
Externí odkaz:
https://doaj.org/article/e5068a9417394458a16840e373310119
Publikováno v:
Journal of Advances in Modeling Earth Systems, Vol 14, Iss 2, Pp n/a-n/a (2022)
Abstract In global atmospheric modeling, the differences between nonhydrostatic (NH) and hydrostatic (H) dynamical cores are negligible in dry simulations when grid spacing is larger than 10 km. However, recent studies suggest that those differences
Externí odkaz:
https://doaj.org/article/c0b34b89f95a482cbfbfb97f5b8c77d0
Autor:
P. M. Caldwell, C. R. Terai, B. Hillman, N. D. Keen, P. Bogenschutz, W. Lin, H. Beydoun, M. Taylor, L. Bertagna, A. M. Bradley, T. C. Clevenger, A. S. Donahue, C. Eldred, J. Foucar, J.‐C. Golaz, O. Guba, R. Jacob, J. Johnson, J. Krishna, W. Liu, K. Pressel, A. G. Salinger, B. Singh, A. Steyer, P. Ullrich, D. Wu, X. Yuan, J. Shpund, H.‐Y. Ma, C. S. Zender
Publikováno v:
Journal of Advances in Modeling Earth Systems, Vol 13, Iss 11, Pp n/a-n/a (2021)
Abstract This paper describes the first implementation of the Δx = 3.25 km version of the Energy Exascale Earth System Model (E3SM) global atmosphere model and its behavior in a 40‐day prescribed‐sea‐surface‐temperature simulation (January 2
Externí odkaz:
https://doaj.org/article/d924e18522e14e8a9fa76e1f9bc4daa8
Autor:
L. Bertagna, M. Deakin, O. Guba, D. Sunderland, A. M. Bradley, I. K. Tezaur, M. A. Taylor, A. G. Salinger
Publikováno v:
Geoscientific Model Development, Vol 12, Pp 1423-1441 (2019)
We present an architecture-portable and performant implementation of the atmospheric dynamical core (High-Order Methods Modeling Environment, HOMME) of the Energy Exascale Earth System Model (E3SM). The original Fortran implementation is highly perfo
Externí odkaz:
https://doaj.org/article/ebdc91bdc652409c8fad5a797e47bc6f
Publikováno v:
Geoscientific Model Development, Vol 7, Iss 6, Pp 2803-2816 (2014)
We evaluate the performance of the Community Atmosphere Model's (CAM) spectral element method on variable-resolution grids using the shallow-water equations in spherical geometry. We configure the method as it is used in CAM, with dissipation of g
Externí odkaz:
https://doaj.org/article/e982b826570d4093bc3f188ae45245e1
Autor:
P. H. Lauritzen, P. A. Ullrich, C. Jablonowski, P. A. Bosler, D. Calhoun, A. J. Conley, T. Enomoto, L. Dong, S. Dubey, O. Guba, A. B. Hansen, E. Kaas, J. Kent, J.-F. Lamarque, M. J. Prather, D. Reinert, V. V. Shashkin, W. C. Skamarock, B. Sørensen, M. A. Taylor, M. A. Tolstykh
Publikováno v:
Geoscientific Model Development, Vol 7, Iss 1, Pp 105-145 (2014)
Recently, a standard test case suite for 2-D linear transport on the sphere was proposed to assess important aspects of accuracy in geophysical fluid dynamics with a "minimal" set of idealized model configurations/runs/diagnostics. Here we present re
Externí odkaz:
https://doaj.org/article/cd0d086b309b48768ebdf879fe46a131