UNIGE document Scientific Article
previous document  unige:18437  next document
add to browser collection
Title

Potential effects of changes in mean climate and climate variability on the yield of winter and spring crops in Switzerland

Authors
Calanca, Pier-Luigi
Schmid, Stéphanie
Fuhrer, Jürg
Published in Climate Research. 2007, vol. 34, p. 59-69
Abstract Climate change is expected to affect both the average level and the variability of crop yields. In this modelling study, we quantified mean and inter-annual variability of grain yield for maize Zea mays L., winter wheat Triticum spp. L. and winter canola Brassica napus L. for climatic conditions corresponding to current and doubled atmospheric CO2 concentrations. Climate scenarios with and without taking into account changes in the inter-annual variability of climate were developed from the output of a regional climate model for the time window 2071 to 2100. Climate change effects on the mean yield of maize and canola were consistently negative, but a positive impact was simulated for mean yield of winter wheat for elevated CO2 concentration. The coefficient of yield variation increased in the scenarios for maize and canola, but decreased for wheat. Higher thermal time requirements increased mean yield and reduced yield variability for all crops. Shifts in the sowing dates had a beneficial impact on the yield of maize, but not on the yield of canola and wheat. It is concluded that in the Alpine region, the potential effect of climate change is crop-specific. However, the introduction of new cultivars may provide means by which to maintain or even increase current productivity levels for most of the crops.
Full text
Article (Published version) (1.1 MB) - public document Free access
Structures
Research groups ISE Pôle Sciences
ISE Climat
Citation
(ISO format)
TORRIANI, Daniele et al. Potential effects of changes in mean climate and climate variability on the yield of winter and spring crops in Switzerland. In: Climate Research, 2007, vol. 34, p. 59-69. https://archive-ouverte.unige.ch/unige:18437

505 hits

2284 downloads

Update

Deposited on : 2012-02-20

Export document
Format :
Citation style :