Can not stop the rise of the sea

Sea level worldwide will increase by at least 2 meters in the 21st century and now there is no way for mankind to reverse this phenomenon.

Reuters said, the statement was made during a climate conference at Oxford University (UK) on September 29.

'Currently the sea level rises very slowly, but when it enters the accelerating phase, we will not be able to do anything to prevent it, even if we completely eliminate the emissions ', Stefan Rahmstorf, a scientist of the Institute Potsdam (Germany), stated. Rahmstorf is one of the world's leading experts on the sea.

The majority of scientists attending the conference said that human-generated greenhouse gas emissions would raise the global temperature by at least 2 degrees Celsius in the 21st century. The average temperature of the green planet has increased by 0. , 7-0.8 degrees Celsius in the last century.

According to Rahmstorf, the least serious consequence that humans can witness is: After the earth's temperature stabilizes, the sea level will only increase slowly and steadily for several centuries, not suddenly accelerating.

Rahmstorf calculated that if the earth's temperature only increased by 1.5 degrees Celsius, the sea level would still increase by 2 m in the next few centuries. Then some island nations will disappear, thousands of beaches will also be wiped out. In case the sea level rises by 1 meter and the temperature increases by 3 degrees Celsius in this century, sea level will rise by 5 m over the next 300 years.

A seawall on Coogee beach, Australia.(Photo: AP)

' Humans have no way to stop the rise of seawater unless we lower the earth's temperature. To make the planet cooler, we have to reduce the amount of carbon dioxide in the atmosphere. With the measures that countries are taking, reducing CO2 emissions is an utopian plan , 'Rahmstorf said.

Scientists believe that melting ice is one of the factors promoting sea level rise. Tape reflects sunlight. When the ice area on the ocean surface decreases, seawater will absorb more sunlight and become hotter. The hotter the sea, the faster the ice melts.

Pier Vellinga, a researcher from the University of Wageningen (Netherlands), said: ' Even if we completely eliminate emissions in the atmosphere, the rise of sea water is still irreversible. I concluded that when the average temperature of the earth increased by more than 2 degrees Celsius, the possibility of ice on Greenland island would be 50% or more. Then sea water will increase by 7 m in the next 300-1,000 years . '

Representatives of about 190 countries are participating in the climate conference in Bangkok's capital of Thailand (opened on September 28). According to the AP, the goal of the conference is to urge countries to come up with a new agreement to cut emissions to replace the Kyoto Protocol (which will expire in 2012). Scientists attending the Oxford University conference gave evidence in history to protect their views on the rising trend of the sea. 3 million years ago, the earth's temperature increased by 2-3 degrees Celsius and the sea level increased by 25-35 meters, to about 122,000 years ago, the global temperature increased by 2 degrees Celsius and sea level increased by 10 meters.

' The spectacle we are witnessing in Greenland, Antarctica may be a temporary phenomenon, but that may also be the beginning of a trend that the earth has experienced from 122,000 years ago ,' Vellinga said.

Vellinga and other scientists confirmed that the sea level rose by about 20 cm in the last century and the rate of rise is increasing. That rise increases the power of many storms that Ketsana is raging in Southeast Asia as an example.

' The higher the sea level, the more terrible the flood is caused by the storm, ' Rahmstorf explained.

Robert Nicholls, an expert at the University of Southampton (UK), said about 40 million people (0.6% of the total population) around the world live in flooded plains. Those areas own up to 5% of global assets due to the presence of many high-value assets such as airports and power plants.