The DOI matches its Crossref record; 52 of the 52 references it cites were found in a registry or an index.
Global crop yield response to extreme heat stress under multiple climate change futures
Open accessAbstract
Extreme heat stress during the crop reproductive period can be critical for crop productivity. Projected changes in the frequency and severity of extreme climatic events are expected to negatively impact crop yields and global food production. This study applies the global crop model PEGASUS to quantify, for the first time at the global scale, impacts of extreme heat stress on maize, spring wheat and soybean yields resulting from 72 climate change scenarios for the 21st century. Our results project maize to face progressively worse impacts under a range of RCPs but spring wheat and soybean to improve globally through to the 2080s due to CO 2 fertilization effects, even though parts of the tropic and sub-tropic regions could face substantial yield declines. We find extreme heat stress at anthesis (HSA) by the 2080s (relative to the 1980s) under RCP 8.5, taking into account CO 2 fertilization effects, could double global losses of maize yield ( Δ Y = −12.8 ± 6.7% versus − 7.0 ± 5.3% without HSA), reduce projected gains in spring wheat yield by half ( Δ Y = 34.3 ± 13.5% versus 72.0 ± 10.9% without HSA) and in soybean yield by a quarter ( Δ Y = 15.3 ± 26.5% versus 20.4 ± 22.1% without HSA). The range reflects uncertainty due to differences between climate model scenarios; soybean exhibits both positive and negative impacts, maize is generally negative and spring wheat generally positive. Furthermore, when assuming CO 2 fertilization effects to be negligible, we observe drastic climate mitigation policy as in RCP 2.6 could avoid more than 80% of the global average yield losses otherwise expected by the 2080s under RCP 8.5. We show large disparities in climate impacts across regions and find extreme heat stress adversely affects major producing regions and lower income countries.
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Heat Waves: Physical Understanding and Scientific Challenges
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Metadata
- Authors
- Deryng, D., Conway, D., Ramankutty, N., Price, J., & Warren, R.
- Venue
- Environmental Research Letters
- Publisher
- IOP Publishing
- Published
- 2014-03-01
- Volume
- 9
- Issue
- 3
- Pages
- 034011
- ISSN
- 1748-9326 (ISSN-L)
- OpenAlex
- W2105117295
- Cited by
- 699
- References
- 52
- FWCI
- 46.59
- Type
- journal article
- Language
- en
- Open access
- gold
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