Climate Change Affects Winter Chill for Temperate Fruit and Nut Trees
Open Access
- 24 May 2011
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 6 (5), e20155
- https://doi.org/10.1371/journal.pone.0020155
Abstract
Temperate fruit and nut trees require adequate winter chill to produce economically viable yields. Global warming has the potential to reduce available winter chill and greatly impact crop yields. We estimated winter chill for two past (1975 and 2000) and 18 future scenarios (mid and end 21st century; 3 Global Climate Models [GCMs]; 3 greenhouse gas emissions [GHG] scenarios). For 4,293 weather stations around the world and GCM projections, Safe Winter Chill (SWC), the amount of winter chill that is exceeded in 90% of all years, was estimated for all scenarios using the “Dynamic Model” and interpolated globally. We found that SWC ranged between 0 and about 170 Chill Portions (CP) for all climate scenarios, but that the global distribution varied across scenarios. Warm regions are likely to experience severe reductions in available winter chill, potentially threatening production there. In contrast, SWC in most temperate growing regions is likely to remain relatively unchanged, and cold regions may even see an increase in SWC. Climate change impacts on SWC differed quantitatively among GCMs and GHG scenarios, with the highest GHG leading to losses up to 40 CP in warm regions, compared to 20 CP for the lowest GHG. The extent of projected changes in winter chill in many major growing regions of fruits and nuts indicates that growers of these commodities will likely experience problems in the future. Mitigation of climate change through reductions in greenhouse gas emissions can help reduce the impacts, however, adaption to changes will have to occur. To better prepare for likely impacts of climate change, efforts should be undertaken to breed tree cultivars for lower chilling requirements, to develop tools to cope with insufficient winter chill, and to better understand the temperature responses of tree crops.This publication has 40 references indexed in Scilit:
- Winter and spring warming result in delayed spring phenology on the Tibetan PlateauProceedings of the National Academy of Sciences of the United States of America, 2010
- A global analysis of the comparability of winter chill models for fruit and nut treesInternational Journal of Biometeorology, 2010
- Applied Climate-Change Analysis: The Climate Wizard ToolPLOS ONE, 2009
- Forest flora turnover with climate change in the Mediterranean region: A case study in Southeastern FranceForest Ecology and Management, 2009
- Climatic Changes Lead to Declining Winter Chill for Fruit and Nut Trees in California during 1950–2099PLOS ONE, 2009
- Auswirkungen des Klimawandels auf die Verfügbarkeit von Kältewirkung (Chilling) für Obstgehölze in DeutschlandErwerbs-Obstbau, 2009
- Impacts of climate change on wheat in England and WalesJournal of The Royal Society Interface, 2008
- Statistical validation of daylength definitions for estimation of global solar radiation in Toledo, SpainEnergy Conversion and Management, 2005
- The temperature dependence of dormancy breaking in plants: Computer simulation of processes studied under controlled temperaturesJournal of Theoretical Biology, 1987
- The temperature dependence of dormancy breaking in plants: Mathematical analysis of a two-step model involving a cooperative transitionJournal of Theoretical Biology, 1987