Global warming not confirmed to have caused worldwide heat waves

08:16, August 02, 2010      

Email | Print | Subscribe | Comments | Forum 

Climate experts still can't be sure whether global warming has caused the excruciating heat waves which are currently grilling nations in the northern hemisphere such as China, Japan, the United States and Russia, and constantly refresh their power demand records.

Scientists believe the present hot weather is formed by a pack of reasons instead of a single one, meaning the global warming.

Dr. Alexander Frolov, chief of the Russian Federal Service for Hydrometeorology (Roshydromet), said the high temperature cannot either prove or deny the global warming theory, because meteorology is a statistical science, which requires substantial and coherent data.

He said the only credible signal of a warming planet is for such hot weather to repeat annually, or at least every five years, for three decades. He also admitted 2010 would be the hottest year ever since humans began to ink such records.

The U.S. National Center for Atmospheric Research (NCAR) said in its report in early 2009 that the hottest days were over twice as many as the coldest days in America over the past 10 years, adding that the number of the hottest days would continue to surge in the future.

Thus, the canicule, which is cooking the eastern part of the United States, has been taken as a proof of the report's projections.

The United Nations also said in its report that global warming would reliably create extreme weather like heat waves and storms.

As these experts cannot confirm the culprit of the miserable weather, their explanations, apart from global warming, vary from one to another, including abnormal atmospheric circulation and El Nino.

They agree that, according to the scientific theory, high temperature is a direct result of warm high or warm anticyclone, which, if it maintains hovering over a certain place, would trigger long term heat waves.

Yoshihiro Tchibana, an Earth environmental meteorology professor at Japan's Mie University, said broiling summers due to anticyclone seem to arrive roughly every 10 years.

Japan's Meteorological Agency further elaborated on the anticyclone theory. The agency said the westerly wind, which usually rounds the Earth along a oblique route. However, it made an unexpected turn towards the North Pole in early July, leaving much of the middle-latitude zone in the boiling heat.

Shotaro Tanaka, scientific officer at the agency, said besides these hot middle-latitude areas, oceans and underpopulated regions are rather cool, adding that not the entire globe is warming up.

Jay Lawrimore, chief of climate analysis at the federal National Climatic Data Center (NCDC), said El Nino is also behind the scene.

The phenomenon refers to warm ocean current that flows along the Equator from the date line and south off the coast of Ecuador at Christmas time.

Although El Nino has ended this year, it has caused the warm weather in Pacific Equatorial area and abnormal heat worldwide, he said.

Whatever the causes, these experts agree that they should take various meteorological elements into consideration against the backdrop of climate change, so as to draw a comprehensive conclusion.

Source: Xinhua


  • Do you have anything to say?


Special Coverage
  • Premier Wen Jiabao visits Hungary, Britain, Germany
  • From drought to floods
Major headlines
Editor's Pick
  • Staff members watch a screen showing the blast-off of the Long March-2FT1 carrier rocket loaded with Tiangong-1 unmanned space lab module at Beijing Aerospace Control Center, Sept. 29, 2011. Commander-in-chief of China's manned space program Chang Wanquan announced Thursday night that the launch of Tiangong-1 space lab module was successful. (Xinhua/Wang Shen)
  • Chinese President Hu Jintao watches the launch of Tiangong-1 space lab module at Beijing Aerospace Control Center in Beijing, capital of China, Sept. 29, 2011. Other members of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee, including Wu Bangguo, Jia Qinglin, Li Changchun, Xi Jinping, Li Keqiang and Zhou Yongkang, are also present. (Xinhua/Rao Aimin)
  • The graphics shows the launch procedures of the carrier rocket of Tiangong-1 space lab module, Long March-2FT1 on Sept. 29, 2011. (Xinhua/Lu Zhe)
  • Image taken from Beijing Aerospace Control Center shows a Long March-2FT1 carrier rocket loaded with Tiangong-1 unmanned space lab module blasting off from the launch pad at the Jiuquan Satellite Launch Center in northwest China's Gansu Province, Sept. 29, 2011. (Xinhua)
  • On Sept. 28, tourists travel around the Mingshashan Scenic Area in Dunhuang, Gansu province by camel. With the National Day vacation right around the corner, more and more tourists from home and abroad are going to Dunhuang. Riding on a camel, they travel in the desert to enjoy the cities rare form of natural scenery. (Xinhua/Zhang Weixian)
  • Chinese forest armed forces work together with forest firefighters on Sept. 28. (Xinhua/Chai Liren)
Hot Forum Discussion