Results 21 to 30 of about 55,445 (259)

Efficient Parallel I/O in Community Atmosphere Model (CAM) [PDF]

The International Journal of High Performance Computing Applications, 2008
Century-long global climate simulations at high resolutions generate large amounts of data in a parallel architecture. Currently, the community atmosphere model (CAM), the atmospheric component of the NCAR community climate system model (CCSM), uses sequential I/O which causes a serious bottleneck for these simulations.
Yu-heng Tseng, Chris H. Q. Ding
openaire   +2 more sources

Impacts of cloud superparameterization on projected daily rainfall intensity climate changes in multiple versions of the Community Earth System Model

Journal of Advances in Modeling Earth Systems, 2016
Changes in the character of rainfall are assessed using a holistic set of statistics based on rainfall frequency and amount distributions in climate change experiments with three conventional and superparameterized versions of the Community Atmosphere ...
Gabriel J. Kooperman, Michael S. Pritchard, Melissa A. Burt, Mark D. Branson, David A. Randall   +4 more
doaj   +1 more source

Exploring Western North Pacific Tropical Cyclone Activity in the High‐Resolution Community Atmosphere Model

Earth and Space Science, 2022
High‐resolution climate models (∼28 km grid spacing) can permit realistic simulations of tropical cyclones (TCs), thus enabling their investigation in relation to the climate system.
Xiaoning Wu, Kevin A. Reed, Patrick Callaghan, Julio T. Bacmeister   +3 more
doaj   +1 more source

Extending scalability of the community atmosphere model

Journal of Physics: Conference Series, 2007
The Community Atmosphere Model (CAM) is the atmosphere component of the Community Climate System Model (CCSM), and is the largest consumer of computing resources in typical CCSM simulations. The parallel implementation of the Community Atmosphere Model (CAM) employs a number of different domain decompositions. Currently, each decomposition must utilize
Mirin, A, Worley, P
openaire   +1 more source

Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5

Environmental Research Letters, 2023
This study investigates the sensitivity of the boreal winter prediction skill of Community Atmosphere Model 5 to the choice of the dynamical core. Both finite volume (FV) and spectral element (SE) dynamical cores are tested.
Ha-Rim Kim, Baek-Min Kim, Yong-Sang Choi, Sang-Yoon Jun, Seok-Woo Son   +4 more
doaj   +1 more source

An extensible perturbed parameter ensemble for the Community Atmosphere Model version 6 [PDF]

Geoscientific Model Development
This paper documents the methodology and preliminary results from a perturbed parameter ensemble (PPE) technique, where multiple parameters are varied simultaneously and the parameter values are determined with Latin hypercube sampling. This is done with
T. Eidhammer, A. Gettelman, A. Gettelman, K. Thayer-Calder, D. Watson-Parris, G. Elsaesser, G. Elsaesser, H. Morrison, M. van Lier-Walqui, M. van Lier-Walqui, C. Song, D. McCoy   +11 more
doaj   +1 more source

Radiative effect and climate impacts of brown carbon with the Community Atmosphere Model (CAM5) [PDF]

Atmospheric Chemistry and Physics, 2018
A recent development in the representation of aerosols in climate models is the realization that some components of organic aerosol (OA), emitted from biomass and biofuel burning, can have a significant contribution to shortwave radiation absorption in ...
H. Brown, X. Liu, Y. Feng, Y. Jiang, M. Wu, Z. Lu, C. Wu, C. Wu, S. Murphy, R. Pokhrel   +9 more
doaj   +1 more source

The impact of natural versus anthropogenic aerosols on atmospheric circulation in the Community Atmosphere Model [PDF]

Climate Dynamics, 2010
The equilibrium response of atmospheric circulation to the direct radiative effects of natural or anthropogenic aerosols is investigated using the Community Atmosphere Model (CAM3) coupled to two different ocean boundary conditions: prescribed climatological sea surface temperatures (SSTs) and a slab ocean model.
Allen, Robert J., Sherwood, Steven C.
openaire   +1 more source

A Scalable Implementation of a Finite-Volume Dynamical Core in the Community Atmosphere Model [PDF]

The International Journal of High Performance Computing Applications, 2005
We present a distributed memory message passing parallel implementation of a finite-volume discretization of the primitive equations in the Community Atmosphere Model. Due to the data dependences resulting from the polar singularity of the latitude-longitude coordinate system, we employ two separate domain decompositions within the dynamical core: one ...
Sawyer, W, Mirin, A
openaire   +2 more sources

The Atmosphere-Ocean General Circulation Model EMAC-MPIOM [PDF]

Geoscientific Model Development, 2011
The ECHAM/MESSy Atmospheric Chemistry (EMAC) model is coupled to the ocean general circulation model MPIOM using the Modular Earth Submodel System (MESSy) interface.
A. Pozzer, P. Jöckel, B. Kern, H. Haak
doaj   +1 more source