NDLI: Parallel Computation of the Weather Research and Forecast (WRF) WDM5 Cloud Microphysics on a Many-Core GPU

Content Provider	IEEE Xplore Digital Library
Author	Jun Wang Bormin Huang Huang, A. Goldberg, M.D.
Copyright Year	2011
Abstract	The Weather Research and Forecast (WRF) Double Moment 5-class (WDM5) mixed ice microphysics scheme predicts mixing ratio of hydrometeors and their number concentrations for warm rain species including clouds and rain. WDM5 can be computed in parallel in the horizontal domain using a many-core GPU. In order to obtain better GPU performance, we manually rewrote the original WDM5 Fortran module into a highly parallel CUDA C program. The GPU-based implementation of WDM5 microphysics scheme on 1 GTX590 GPU achieves a significant speedup of 147× over its CPU-based single-threaded counterpart when we use asynchronous data transfer and non-coalesced memory access. More importantly, the speedup excluding the host-device data transfer time is 206× when using coalesced memory access. Since the WDM5 microphysics scheme is only an intermediate module of the entire WRF model, its input data should be already available in the GPU global memory from previous modules and its output data should reside at the GPU global memory for later usage by other modules.
Starting Page	1032
Ending Page	1037
File Size	253718
Page Count	6
File Format	PDF
ISBN	9781457718755
ISSN	15219097
e-ISBN	9780769545769
DOI	10.1109/ICPADS.2011.160
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-07
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Graphics processing unit Wavelength division multiplexing Clouds Ice Snow Rain Instruction sets CUDA WRF WDM5 microphysics scheme GPU
Content Type	Text
Resource Type	Article
Subject	Hardware and Architecture

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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