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Consistent negative response of US crops to high temperatures in observations and crop models

Schauberger, Bernhard; Archontoulis, Sotirios; Arneth, Almut 1; Balkovic, Juraj 2; Ciais, Philippe; Deryng, Delphine; Elliott, Joshua; Folberth, Christian 2; Khabarov, Nikolay 2; Müller, Christoph; Pugh, Thomas A. M. 1; Rolinski, Susanne; Schaphoff, Sibyll; Schmid, Erwin; Wang, Xuhui; Schlenker, Wolfram; Frieler, Katja
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT)
2 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

High temperatures are detrimental to crop yields and could lead to global warming-driven reductions in agricultural productivity. To assess future threats, the majority of studies used process-based crop models, but their ability to represent effects of high temperature has been questioned. Here we show that an ensemble of nine crop models reproduces the observed average temperature responses of US maize, soybean and wheat yields. Each day >30 °C diminishes maize and soybean yields by up to 6% under rainfed conditions. Declines observed in irrigated areas, or simulated assuming full irrigation, are weak. This supports the hypothesis that water stress induced by high temperatures causes the decline. For wheat a negative response to high temperature is neither observed nor simulated under historical conditions, since critical temperatures are rarely exceeded during the growing season. In the future, yields are modelled to decline for all three crops at temperatures >30 °C. Elevated CO2 can only weakly reduce these yield losses, in contrast to irrigation.


Verlagsausgabe §
DOI: 10.5445/IR/1000065762
Originalveröffentlichung
DOI: 10.1038/ncomms13931
Scopus
Zitationen: 308
Web of Science
Zitationen: 284
Dimensions
Zitationen: 342
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 2041-1723
urn:nbn:de:swb:90-657622
KITopen-ID: 1000065762
HGF-Programm 12.02.02 (POF III, LK 01) Vegetation climate- and land use system
Erschienen in Nature Communications
Verlag Nature Research
Band 8
Seiten 13931
Schlagwörter Agroecology, Agriculture, Climate-change impacts
Nachgewiesen in Web of Science
Dimensions
Scopus
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