People make storms more violent

The greenhouse gases emitted by humans in the past few decades increase the temperature of the sea water, which directly increases the intensity of storms. A series of recent research shows that.

(Photo: flickr.com) In June this year, Kevin Trenberth, an expert at the National Center for Atmospheric Research (USA), published the results of the analysis of storms in the North Atlantic during the year. 2005. Accordingly, the ocean surface temperature increased by 0.9 degrees Celsius compared to the average level in previous years. After comparing the Atlantic surface temperature with other oceans, Trenberth judged that half of the surface temperature rise in the Atlantic was caused by human emissions.

Last July, Dr. Kerry Emanuel at the Massachusetts Institute of Technology, USA, published a report. Accordingly, the time, maximum wind speed and energy of tropical storms have increased significantly in both the North Atlantic Ocean and the northern Pacific Ocean since the mid-1970s.

A few months later, Peter Webster at the Georgia Institute of Technology published another study. According to his report, from 1975 to 1989 there were 171 extremely strong storms (types 4 and 5). But in the next 15 years, this number increased to 269.

"The rise in ocean surface temperatures, one of the consequences of a greenhouse effect, is responsible for the continuous increase in storm intensity," Webster said.

In the most recent study, scientists at the Lawrence Livermore National Laboratory (US) used 22 climate models - created on computers - to examine the relationship between rising phenomena. Ocean surface temperature and greenhouse gases caused by human waste.

" Human activity is responsible for at least 67% of surface temperature increases in the Atlantic and Pacific oceans, where storms form ," said Dr. Benjamin Santer, lead researcher. .

Viet Linh