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Posits as an alternative to floats for weather and climate models

Abstract:

Posit numbers, a recently proposed alternative to floating-point numbers, claim to have smaller arithmetic rounding errors in many applications. By studying weather and climate models of low and medium complexity (the Lorenz system and a shallow water model) we present benefits of posits compared to floats at 16 bit. As a standardised posit processor does not exist yet, we emulate posit arithmetic on a conventional CPU. Using a shallow water model, forecasts based on 16-bit posits with 1 or 2...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1145/3316279.3316281

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Subgroup:
Atmos Ocean & Planet Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Subgroup:
Atmos Ocean & Planet Physics
Role:
Author
Publisher:
Association for Computing Machinery Publisher's website
Pages:
Article: 2
Publication date:
2019-03-13
Acceptance date:
2019-02-04
DOI:
Pubs id:
pubs:996851
URN:
uri:984094f0-a1b0-438e-a226-4c5cb252c2f3
UUID:
uuid:984094f0-a1b0-438e-a226-4c5cb252c2f3
Local pid:
pubs:996851
ISBN:
9781450371391

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