Heat waves in the United States tend to be preceded by 15 to 20 days by a specific pattern of atmospheric circulation, concludes an article published online this week in Nature Geoscience.
Rainfall intensification, sea level rise, ocean acidification, hotter days, and longer and more intense heatwaves all point to the fact that climate change presents a major threat to Australia and the world.
Although the average temperatures in June, July and August are a pleasant 25°C or so, the thermometer can creep above 40°C, and heat waves are quite common.
Earlier springs and heatwaves are affecting harvest times and, more importantly, the characteristics of the grapes- for example, less acidity and more alcohol threaten the distinctive taste of the wine.
The scientists say in their report that“every heat wave occurring in Europe today is made more likely and more intense by human-induced climate change.”.
Heatwaves increase rates of death and disease for all populations, but especially for elderly and vulnerable groups, often exacerbating pre-existing health conditions.
Heatwaves such as occurred in Europe in 2003, which caused up to 70,000"excess" deaths, will become more common, as will hurricanes, cyclones and storms, causing flooding and injuries.
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