Recently, the global temperature has generally increased, with the highest temperature in winter in many cities 100 years. According to the report released by the World Meteorological Organization, 2006 was the sixth hottest year since 186 1 had meteorological records. Whether the change of weather indicates the serious consequences of the deterioration of the earth's environment. Will the scene of the movie The Day After Tomorrow be staged in real life?
Scientists have analyzed that there are two main reasons for this warm winter weather, one is the influence of a new round of El Ni? o phenomenon, and the other is the greenhouse effect formed by the long-term accumulation of greenhouse gases.
El Nino is a large-scale continuous abnormal warming phenomenon of seawater in the eastern and central equatorial Pacific, which can increase the temperature, making 1998 the highest annual average temperature in the world since meteorological records were recorded. The current El Nino phenomenon was formed in the second half of last year, and it will also trigger a wide range of extreme weather and climate events in the first few months of this year.
Another factor that cannot be ignored is the greenhouse effect caused by a large number of greenhouse gas emissions. According to scientists' estimation, the greenhouse effect will raise the global temperature by 2 degrees Celsius to 6 degrees Celsius in this century. Macroscopically, the global temperature has reached a new peak. According to the research report in the Journal of the National Academy of Sciences in September, 2006, the earth's temperature has reached 1 0.2 million years ago, and the difference between the highest temperature in the interglacial period (warming period between two ice ages) and the highest temperature in the recent 1 10,000 years is less than1degree Celsius. Due to the above factors, the global temperature in 2007 will probably exceed 1998, making it the hottest year in history.
Warm winters bring many disasters.
"We only have one earth, and global warming will affect every citizen." Qin Dahe, director of China Meteorological Bureau, said that mankind will pay the price for climate warming. Professor Ding, special climate consultant of China Meteorological Bureau, said in an interview that climate warming will change the layout of main crop varieties in China and affect the planting system, and the risk of planting boundaries moving northward and westward will increase. It is estimated that by 2030, due to the influence of global warming, the crop yield in China may be reduced by about 5% to 10%, with wheat, rice and corn as the main crops. In addition, global warming is conducive to the overwintering and reproduction of agricultural pests and diseases, leading to more serious agricultural pests and diseases and weeds.
Climate warming will also lead to water shortage and increased mortality. After global warming, the evaporation of the Yellow River and inland rivers may increase by about 15%. With the decrease of runoff and the increase of evaporation, the instability of water resources system and the contradiction between supply and demand of water resources will be intensified. After global warming, high-temperature heat waves will increase, leading to an increase in heat-related diseases and deaths. In addition, the increase of floods will increase the risk of drowning and the possibility of the spread of diarrhea and respiratory diseases.