Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Climate change may affect East Asia differently from North Atlantic nations

21.06.2006
The extreme effects of climate change on the world depicted in the US blockbuster movie The Day After Tomorrow may not be quite true where East Asia is concerned, according to a new study.

In particular, the scene from the film depicting huge ice balls falling on Tokyo, causing death and destruction, is very unlikely. The research suggests that temperatures are unlikely to change as drastically in East Asia as they could do in countries bordering the North Atlantic, such as America and Great Britain.

The study was led by Newcastle University, with partners in Germany and Japan*, and is published in the July issue of Geology, the journal from the Geological Society of America.

Researchers studied the period from 16,000 - 10,000 years ago as they believe that climate change patterns experienced in that period are similar to those we are experiencing today. This is because then, as now, temperatures were gradually increasing from cold to warm.

Around 12,000 years ago, the world experienced a huge surge in cold temperatures - known as the ‘Younger Dryas’ cold reversal event - that lasted around 1,000 years.

Warming caused ice from the polar cap to melt into the sea and destabilise the Gulf Stream, leading to a drastic drop in temperatures. The Gulf carries warm water from the tropics to the North Atlantic and raises air temperatures (otherwise known as the North Atlantic drift).

Some scientists expect that current global warming will trigger a repeat of this cold surge in years to come, a scenario enacted in The Day After Tomorrow. In the film, the world experienced a massive global ‘superstorm’ which resulted in an ice age within days.

However, the Geology paper suggests that this scenario may not be experienced across the globe. For the study, researchers analysed fossilised pollen samples contained in the sediment taken the bottom of Lake Suigetsu in Japan.

Pollen samples can indicate the changes in the type of vegetation over time, which in turn indicates changes in the climate. By comparing information from this material with statistics from the present day, the researchers were able to determine the change in temperature and precipitation over time for the period from 16,000 years ago to 10,000 years ago.

The statistics reflected a cold surge at around 12,000 years but temperatures only fluctuated slightly - an estimated 5 degrees centigrade decrease in winter and no more than three degrees centigrade decrease in summer. It is believed the North Atlantic experienced a seven to 10 degrees centigrade decrease in temperatures during the same event.

These results suggest that East Asia reacted differently to global warming 12,000 years ago. If the pattern is repeated as researchers expect it to, the same effect is likely the next time a cold surge happens.

The researchers suggest that this is because the Asian monsoon front largely acts as a barrier from the effect of North Atlantic cooling, so temperature predictions will apply to Japan and other lands east of the monsoon barrier.

Tokyo itself is likely to experience an intensification of the winter monsoon during a cold surge, with slightly colder temperatures and more snow.

Lead researcher, Dr Takeshi Nakagawa, a palaeoclimatologist and lecturer with Newcastle University’s School of Geography, Politics and Sociology, said: “The research suggests Asia will not be as severely affected by the destabilising of the Gulf stream as countries bordering the Northern Atlantic. The cooling effect will be more gradual than abrupt.

“There may be some changes in East Asia, too, but the changes will be mostly in winter. Economically this means that the crop in East Asia will be safe because changes in crop growing season, which is spring to summer, will be relatively minor.

“From the viewpoint of pure science, this research provides another key to understanding how the climate system works as a whole, which should be useful in international deliberations on tackling global warming.”

Dr Nakagawa, who hails from Tokyo, added: “This doesn’t mean that Asia can sit back, enjoy life and not take any responsibility for global warming. We should all be considering on how we can reduce the detrimental impact of human activity on the world as a whole which may be contributing to climate change.”

Dr Nakagawa is due to embark on another research trip to Lake Suigetsu, which is part of a three-year project funded by the Natural Environment Research Council (NERC). His fieldwork will involve working with local and international scientists, using heavy drilling equipment installed on a floating platform in the lake.

The Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) funded the project.

* The research was led by Newcastle University and other team members came from the Institute for Geological Sciences, Freie Universität, Berlin, Germany; the Graduate School of Environmental Studies, Nagoya University, Japan; the International Research Center for Japanese Studies, Kyoto, Japan.

Claire Jordan | alfa
Further information:
http://www.ncl.ac.uk

More articles from Earth Sciences:

nachricht NASA eyes Pineapple Express soaking California
24.02.2017 | NASA/Goddard Space Flight Center

nachricht 'Quartz' crystals at the Earth's core power its magnetic field
23.02.2017 | Tokyo Institute of Technology

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>