worming cats: climate

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Bad Weather From Climate Change Becoming Accepted

It seems the first signs of general acceptance of extreme weather from climate change are forming. Some scientists are openly declaring that change in weather patterns will be permanent or worsen as climate change takes hold. This past year has been one of the wettest on record in eastern Australia. This is blamed on damage to the environment by human activity.

Change is regional with heavy rains in Europe, east Asia and Oceania. The US and Africa were very dry. Greenhouse gasses caused a warming of oceans. This put more moisture into the atmosphere to fall as rain in the large land masses of Europe, Asia and Oceania. A downpour occurred in New Zealand that was a once in 500 years event.

Just why the US remains dry is a problem. It should have received more rain, but weather patterns tends to vary around the world due a balancing effect in humidity. Hurricane Sandy indicates the probable future damage from extreme weather due to climate change. Rising sea levels increases destruction. Such events affects people for the rest of their lives.

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Sea Levels Fall in Eastern Australia

It seems the Earth is trying to balance out global warming itself. There could be a natural balance level that the planet is attempting to reach. In Australia an unusual phenomenon has taken place.

We have had a lot of rain in coastal regions, while inland it remains dry. The arid regions have soaked up the excess water only gradually releasing it to the ocean, so sea levels have not increased. Indeed, sea level has fallen 7 millimeters.

Damaging floods cost Queenslanders millions of dollars. It was so bad that insurance companies refused to reinsured low-lying towns. Even the dry Northern Territory had floods. One of two very close La Ninas was the strongest ever recorded. The year 2012 was rain, rain and more rain.

This is not something that global warming critics should put forward as a natural solution. Only in Australia does the unusual geographic structure of the continent exist. Humid air moved slowly east but moved as far south as Melbourne, pushing up rainfall 20 per cent. Tropical air has never reached Melbourne before.

The fall in sea level is only a blip on the rising graph. The average rise is 3.2 millimeters a year. By the end of the century ocean levels are expected to increase by 820 millimeters, up from previous estimates of 590.

Rising use of carbon fuel may make sea levels rise even more. The oil "boom" in the US threatens all the good work being done by environmentalists to change behavior. Higher production has pushed "peak oil" well into the future. Enthusiasm for non-carbon power sources is waning.

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Australian Birds Change Breeding Times to Suite the Harsh Climate

Human beings may be having problems with variable weather in Australia, but animals are coping well. Zebra finches, pelicans and woodswallows seem to know when the weather changes. If the Spring comes early they nest early. If it is too dry to breed they hold off until times are better. They change their breeding point by months either way.

When glaciation was at its peak the woodswallow population actually boomed. In boom times there is a larger pool of gene carriers ideal for genetic selection when times become harder. More of the birds die off. Yet, the survivors have traits that suite the changed environment.

Australia has the harshest of climates with long periods of drought. Consequently, birds such as pelicans live a longtime on a meagre diet so they can wait for good times to breed. Zebra finches seem to do well even when times are very hard.

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El Niño Predicted a Year in Advance

The world is in a crisis of bad weather. Extremes of climate are becoming regular phenomena. While coastal eastern Australia is getting unprecedented levels of rain. inland there is a drought. We have a drought even though El Niño has not been in effect for years. It could be said that the rain on the coast is caused by La Nina. This does not explain "the dry" inland. Where once weather could be clearly predicted by the El Niño/La Niña cycle, this is no longer the case.

Improvement in weather forecasting now helps in knowing a year in advance whether El Niño or La Niña will be dominant. An El Niño is due. The US would be pleased to get some relief from damaging drought and fires. Australia's last drought was severe. The Queensland government invested heavily in water catchment and storage. When La Niña arrived the government was condemned and even ridiculed for "wasting" money. At the time the investment was deemed necessary by government and constituents alike.

Knowing what will happen a year in advance and preparing for the consequences are not ordinarily done. We usually take action after the fact. There is a lot of inertia out there. People have short memories. When El Niño arrives grass pastures will turn to dust and water rationing will return as well. Australia has historically experienced climatic extremes. This will not change.