What question did this study set out to answer?

Evaluate the sensitivity of 23 maize crop simulation models to elevated temperature and atmospheric carbon dioxide concentrations across diverse global growing conditions.

January 7, 2014Socio-Environmental Systems ModelingOpen Access

How do various maize crop models vary in their responses to climate change factors?

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Authors

SBSimona BassuUniversity of Sassari NBNadine BrissonInstitut National de la Recherche Agronomique JDJ. L. DurandON Semiconductor (United States)

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Implication

Model intercomparison study reveals temperature increases dominate maize yield declines despite carbon dioxide fertilization, indicating rising heat threatens global maize production.

Key Points

Evaluate the sensitivity of 23 maize crop simulation models to elevated temperature and atmospheric carbon dioxide concentrations across diverse global growing conditions.
Conducted an intercomparison of 23 mechanistic maize crop models evaluated across four global sites representing diverse production environments: France, the USA, Brazil, and Tanzania.
Assessed simulated grain yield sensitivity to temperature increases, doubled atmospheric CO2 (from 360 to 720 μmol mol^-1), and varying levels of calibration data.
Temperature increase had a strong negative effect on simulated yields of approximately -0.5 Mg ha^-1 per °C.
Doubling atmospheric CO2 increased average grain yield by 7.5% across models and sites, though models exhibited wide uncertainty in their CO2 response.
Multi-model ensembles accurately predicted absolute yields even with limited calibration data, whereas individual models varied substantially.

Cite This Study

Bassu et al. (2014) studied this question.

synapsesocial.com/papers/6a7dd9d910b6f5f3737d93ec https://doi.org/10.1111/gcb.12520

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Implication

Model intercomparison study reveals temperature increases dominate maize yield declines despite carbon dioxide fertilization, indicating rising heat threatens global maize production.

How do various maize crop models vary in their responses to climate change factors?

Discussion

Member takes

Implication

Key Points

Cite This Study

How do various maize crop models vary in their responses to climate change factors?

Discussion

Member takes

Implication

Key Points

Cite This Study

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