Ground Cover Supplement : GC Supplement - Climate forecasting
13 extreme weather Growers face three interrelated climate risks: running out of moisture, frost and spring heat events. Research in South Australia is examining the risk of damaging heat events on wheat production.
Ground Cover Supplement : GC Supplement - Climate forecasting
13 extreme weather Growers face three interrelated climate risks: running out of moisture, frost and spring heat events. Research in South Australia is examining the risk of damaging heat events on wheat production. It is hoped the research will lead to heat stress ratings similar to those being developed for frost. the chance of having an extremely hot week nearly doubles across much of southern australia during spring months when there are el niño conditions. el niño conditions are associated with extensive warming of the sea surface in the central and eastern tropical Pacific, whereas la niña is associated with extensive cooling. FIGURE 1 Regions of increasing August to November frosts. SOURCE: DR STEVEN CRIMP 0 600 1000km Regions circled in black dashes represent areas of increasing August–November frosts 0.044 0.067 plants coping better with heat stress as grain-fill advanced. a single hot day of 35°c to 36°c during flowering decreased yield by as much as 20 per cent. information on the likelihood of heat events and their impact on wheat yield was presented at grower meetings as part of a discussion on managing climate risk. Historical analysis of the first date of heat events in spring and comparisons between regions was of particular interest. Discussions centred on best-bet risk-management strategies regarding variety choice and flowering time. there is a need for ongoing research to quantify the impact of hot days on the australian grainbelt. More and later Frosts – steven CrIMp it is a cruel paradox that although australia’s climate is warming, the number of frost