Results 221 to 230 of about 55,445 (259)
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Performance Portability in the Physical Parameterizations of the Community Atmospheric Model
The International Journal of High Performance Computing Applications, 2005Community models for global climate research, such as the Community Atmospheric Model, must perform well on a variety of computing systems. Supporting diverse research interests, these computationally demanding models must be efficient for a range of problem sizes and processor counts.
Patrick H. Worley, John B. Drake
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Modeling the atmosphere as an unguided optical communications channel
IEEE International Conference on Communications, World Prosperity Through Communications, 2003The authors propose a system-level model for simulating the Earth's atmosphere as an unguided optical communications channel. The major degradations in received optical intensity introduced by the atmosphere are scintillation, beam spreading, beam wander, and atmospheric transmissivity.
R.M. Nuber, K.S. Shanmugan
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Communication-Avoiding for Dynamical Core of Atmospheric General Circulation Model
Proceedings of the 47th International Conference on Parallel Processing, 2018Dynamical core is one of the most time-consuming parts in the global atmospheric general circulation model, which is widely used for the numerical simulation of the dynamic evolution process of global atmosphere. Due to its complicated calculation procedures and the non-uniformity of latitude-longitude mesh, the parallelization suffers from high ...
Junmin Xiao +7 more
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Atmospheric impacts of an Arctic sea ice minimum as seen in the Community Atmosphere Model
International Journal of Climatology, 2013AbstractThere is growing recognition that reductions in Arctic sea ice extent will influence patterns of atmospheric circulation both within and beyond the Arctic. We explore the impact of 2007 ice conditions (the second lowest Arctic sea ice extent in the satellite era) on atmospheric circulation and surface temperatures and fluxes through a series of
Elizabeth N. Cassano +3 more
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The Specified Chemistry Whole Atmosphere Community Climate Model (SC‐WACCM) [PDF]
Journal of Advances in Modeling Earth Systems, 2014 AbstractWe here present, document and validate a new atmospheric component of the Community Earth System Model (CESM1): the Specified Chemistry Whole Atmosphere Community Climate Model (SC‐WACCM). As the name implies, SC‐WACCM is a middle atmosphere‐resolving model with prescribed, rather than interactive chemistry.
Karen L Smith +2 more
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Atmosphere-ocean laser communication channel simulation and modeling
2009 ISECS International Colloquium on Computing, Communication, Control, and Management, 2009The method of Monte Carlo simulation based on related theoretical analysis is presented for modeling the atmosphere-ocean laser communication channel. The optical characteristics when laser traverses through atmosphere are addressed by taking molecules and aerosol into consideration respectively.
Yan Dong, Xue Qingji
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A New Moist Turbulence Parameterization in the Community Atmosphere Model
Journal of Climate, 2009Abstract A new moist turbulence parameterization is presented and implemented in the Community Atmosphere Model (CAM). It is derived from Grenier and Bretherton but has been heavily modified to improve its numerical stability and efficiency with the long time steps used in climate models. A goal was to provide a more physically realistic
Sungsu Park, Christopher S. Bretherton
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The ARPEGE/IFS atmosphere model: a contribution to the French community climate modelling
Climate Dynamics, 1994A new atmospheric model has been developed jointly by Meteo-France, and the European Centre for Medium-range Weather Forecasts (ECMWF) under the acronyms ARPEGE (action de recherche petite echelle grande echelle, which means research project on small and large scales) and IFS (integrated forecast system). This model includes, inter alia, an atmospheric
M Déqué +3 more
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2007
This chapter addresses the problem of multimodal analysis of human face-to-face communication. This is imporant since in the near future, smart environments equipped with multiple sensory systems will be able to sense the presence of humans and assess recognize their behaviours, actions, and emotional states.
Tomasz M. Rutkowski, Danilo P. Mandic
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This chapter addresses the problem of multimodal analysis of human face-to-face communication. This is imporant since in the near future, smart environments equipped with multiple sensory systems will be able to sense the presence of humans and assess recognize their behaviours, actions, and emotional states.
Tomasz M. Rutkowski, Danilo P. Mandic
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Atmospheric Propagation and Communication Channel Model for Laser Wavelengths: An Update
IEEE Transactions on Communications, 1974Excellent reveiw papers on the state of the art of propagation through the atmosphere at laser wavelengths have been published during and prior to 1970. This concise paper gives a brief update of major developments that took place since 1970. Covered are the saturation phenomenon, heterodyne receiver performance, atmospheric turbulence model, and ...
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