Letter to the Editor
Every time a north wind blows hot air over Adelaide, some Chicken Little cries “Global Warming”. And when an El Nino predictably causes a hot year like 1998 or 2015/16, some sensation-seeking celebrity will trumpet “hottest year eevah”.
They are watching short-term weather ripples and waves and ignoring the underlying climate tide. Daily, monthly and yearly temperature records will always be equalled or broken by extreme weather – that is what weather does.
In the medium term, Earth temperature trends are influenced by variations in solar activities as evidenced by sun-spot cycles. These variations affect solar intensity, cosmic rays, clouds and Earth temperature, causing medium-term climatic events like the Little Ice Age and the Modern Warming. There are persuasive signs that recent solar activity has peaked. So we can expect cooler weather soon.
But to see what the climate is doing we must look long-term…
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