Strange Weather

Snow in Sahara, no snow in Southwestern Finland, bats dropping dead because of extreme heat in Sydney, drought followed by downpoor in California, record number of hurricanes in the USA and East Asia  - the list could be continued almost to infinity...

Whenever there is abnormal weather anywhere, the meteorologists are asked if this can be connected to climate change. Invariably they answer that this single phenomenon can occur even without climate change. That is true, and invariably they also state that weather is different from climate. Very cold weather can occur even if there is global warming. I can just imagine Trump tweeting "Hey, I even stopped global warming, when I said that it is not a threat. Look how cold it has been after that in North America."

Unfortunately, the cold weather in USA and snow in Sahara actually fit very well in the climate change scenarios. All the predictions of climate change agree on three things: the temperatures near poles increase more that elsewhere, the predictability of weather decreases and the likelihood of unusual or extreme weather conditions increases. All these predictions have already taken place. They are, further, interconnected. Because the temperature difference between the poles and Equator decreases, the distribution of high and low pressure areas changes, and as a result the earlier predictable monsuuns or such like become unpredictable: it can snow in Sahara and rain in Finland. Also, the high pressures can persist and cause droughts with extensive wildfires occurring in consequence. At the same time extreme heat may occur. Temperatures close or even above +50 centigrade are difficult to tolerate.

The unpredictability of weather is really the major problem. Human (and other) life has thrived as a result of predictable weather. One has always known that the rain comes more or less in the right time, it is cold when it is supposed to be, the extreme weather conditions never occur etc. That this is the case was actually shown by the bat deaths in Sydney. The bats have evolved in New South Wales for hundreds of thousands to millions of years. During that time they have adapted to the temperature conditions that can be expected. The recent +47 was above what their evolved tolerance could cope with, and they dropped dead from the trees. The predictability of weather is the prerequisite for food production. Agriculture requires rain at the right time, and dry period during harvesting. With climate change one year may bring you downpoor, another extreme heat and drought, and a third frost.

All future generations are treated unjustly, if we don't actually demand our leaders all over the world to forget their slogans about their own nation first, and start enacting decisions which help keeping the world in reasonable state for future generations.