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The northern and southern hemisphere are both facing extreme weather. There is now a cold extremity in the northern hemisphere, as China experienced the worst cold weather in 28 years and the Middle East experienced the worst snowstorm in 30 years. In contrast, in the southern hemisphere, extreme heat waves hit Australia.
The phenomenon that occurs is a repeat. This shows the natural phenomenon is normal, said Zadrach Ledoufij Dupe from the Department of Meteorology, Bandung Institute of Technology (ITB), when contacted from Jakarta, Thursday (10/01/2012).
Zadrach said, required the completeness of statistical data to know the extreme weather phenomenon is miserable. There is a possibility that the six climate components are becoming increasingly disturbed. It leads to climate change that increases the intensity of extreme weather.
China Meteorological Agency said, since the end of November 2012, the average temperature of winter in China 3.8 degrees Celsius below zero or 1.3 degrees cooler than the average temperature in previous years. Xinhua news agency said on Saturday (5/1/2012), citing the official statement of the China Meteorological Agency, citing the worst winter temperatures this time in 28 years.
A number of countries in the Middle East experience extreme cold waves, among them causing flash floods in some areas and the worst snow storms.
Jordan, one of the countries in the Middle East, set Wednesday (9/1/2012) as a national holiday. This is because the weather is so cold. The Jordanian capital, Amman, is also covered in a pile of snow. Weather watchers in Jordan say the snowstorm is the worst this time in 30 years.
The opposite condition, extreme hot weather, takes place in several Australian states, including Tasmania, Victoria, New South Wales and Queensland. Currently thousands of Australians are displaced by heat waves that cause fires. Tens of thousands of livestock fell victim to raging fire.
The highest temperature on Friday (4/1/2012), in the Tasmanian capital, Hobart, reached 41.8 degrees Celsius. It's the highest temperature since weather recordings were conducted in the early 1880s.
Extreme cold weather with repeated periods occurred in China and the Middle East. However, record-breaking occurs in extreme hot weather conditions with the highest temperatures in Australia.
Zadrach explained that six components of climate change include the atmosphere (air), lithosphere (land), hydrosphere (waters), cryosphere (ice cover), biosphere (living creature), and humanosphere (human). The causes of extreme weather in general can be attributed to the annoyance of one or more of the six components of the climate.Humanosphere, according to Zadrach, is a component of human-caused climate change that is currently the most important. However, pointing to the exact cause of extreme weather is not that simple.
Head of the Center for Climate Change and Air Quality at the Meteorology, Climatology and Geophysics Agency (BMKG) Edvin Aldrian said the natural phenomena of the Rossby wave in the polar regions to the subtropics of Europe moves east.
The phenomenon of this Rossby wave movement that caused cold waves and cold weather in Russia and China to floods and snow storms in the Middle East, Edvin said.
There has been no sufficient data to pinpoint the exact cause of extreme weather events, such as the average winter temperature in China to 3.8 degrees celsius below zero or 1.3 degrees cooler than the previous average.
The worst snowstorm in 30 years in the Middle East can be explained. Edvin said, snow storms could be caused by cold surge phenomenon.
Cold is the movement of the wind from the cold region with high pressure to the hotter region with lower pressure. Differences in air pressure result in airflow. A high enough pressure difference can cause airflow to become strong winds that continue into a snow storm.
Flash floods in the Middle East triggered condensation due to meeting cold and hot air. Condensation raises rain.
When the vapor mass of the condensation from the chills is abundant, there was heavy rain. This is what caused the flash floods, as happened in the West Bank, Palestine, Tuesday (8/1). Two women who were riding in a taxi in the West Bank were killed by flash floods.
While temperatures in Australia, Edvin says, it is due to the dry air in the southern Australian region that is receiving the nearest sunlight during the south of the equator. Fires were easily ignited.
Climate and weather variability is increasingly stressful. In order not to further hurt, according to Zadrach, humans should reduce errors and not disturb the six components of the climate.