Hector – a computationally-efficient, open-source, community-based global and regional climate emulator Corinne Hartin, Ben Bond-Lamberty, Robert Link, Ben Vega-Westhoff 2 , Ryan Sriver 2 , Abigail Snyder, Ben Kravitz and Kate Calvin Pacific Northwest National Laboratory/Joint Global Change Research Institute 2 University of Illinois [email protected]U.S. Department of Energy, Office of Science, as part of research in Multi-Sector Dynamics, Earth and Environmental System Modeling Program
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Hector – a computationally-efficient, open-source, community-based global
and regional climate emulator
Corinne Hartin, Ben Bond-Lamberty, Robert Link, Ben Vega-Westhoff2, Ryan Sriver2,
Abigail Snyder, Ben Kravitz and Kate Calvin
Pacific Northwest National Laboratory/Joint Global Change Research Institute
U.S. Department of Energy, Office of Science, as part of research in Multi-Sector Dynamics, Earth and Environmental System Modeling Program
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What is Climate Emulation?
reproduced from Provenzale, A. (2014)
An emulator is a fast approximation to a computationally expensive model that can be used as a surrogate for the model, to quantify uncertainty or to improve process understanding. (Holden et al., 2014)
Earth System Models (ESMs) are state of the art tools for climate predictions.
However, due to their computational demands they limit the range of studies that can be conducted with them.
What if we wanted to know average global mean temperature projections under other scenarios?
What if we wanted to investigate uncertainty across the climate and carbon systems?
Or the probability of exceeding a particular threshold?
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What is Climate Emulation?
reproduced from Provenzale, A. (2014)
Idealized Comprehensive
FAIR
IPCC IR
Hector
MAGICC
ACC2
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Simple Climate Carbon-Cycle Models
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Meinshausen et al., 2011
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• Free and open-source
• Community model
www.github.com/JGCRI/hector
Easy to use and well documented
Hartin et al., 2015 – GMD
Hartin et al., 2016 – BGS
pyhector
rhector
Hector GAMS
Issue tracking
Overview of Hector – Comprehensive Simple Climate Carbon-Cycle Model
• Complexity only where warranted
DOECLIM, BRICK
• Modular
Components can be enabled/disabled via inputs
E.g., test two different ocean submodelsagainst each other
• Modern, clean code structure
E.g., coupler enforces unit checking between submodels