Global climate: Become warm or become cold?

Global climate: Become warm or become cold?
The intersection of intern and tinkling of pieces of jades Feng

At present, the broad strong snowfall weather goes over gradually in our country, the cold air that advances to the southern and eastern area will be over soon. In the face of the snow storm weather that is sent frequently, people can't help asking, under the trend of the global warming of the whole world, what has it indicated such extreme low temperature? Please pay close attention to - -

When year-end end of the year last year, a rare cold current attacked most areas of Northern Hemisphere, especially the country located in high latitude in Northern Hemisphere, it is particularly serious to influenced by this cold wave. Many countries and regions break decades the snowfall is noted down initially among them.

Then, such extreme low-temperature ice and snow weather takes place frequently, whether mean the global climate variation tendency changes to some extent?

Global global warming causes the extreme weather to increase

At the beginning of New Year, a stream of strong cold wave weather nearly sweeps across the whole Northern Hemisphere, many of Northern Hemisphere presents strong snowfall. According to the introduction of chief predictor of China Meteorological Administration Central Meteorological Observatory Sun Jun, the amount of snowfall had of snow storm that this cold wave brings is heavy, duration is long, gale cools the characteristic of the obvious and snow with big depth after the snow.

To the extreme low-temperature weather this time, most experts think global global warming is this great background of the phenomenon, and the global warming is the whole development trend of climatic change of the earth. Taking a broad view of the extreme weather in recent years, some experts say, though concrete reasons are different, but global global warming is one of the important reasons why the global extreme weather increases, even basic reason.

Yan Hong, Deputy Secretary-general of World Meteological Organization, expresses when being interviewed by media, though the weather of extreme severe cold appears in winter in Northern Hemisphere at present, the total trend of global global warming will not have great change, the severe cold weather that should not present total trend and this winter of the global warming Northern Hemisphere is lumped together, should not be thought the two to run counter to either. On the contrary, there is inner link between these two.

According to the introduction to it network of China, this time mainly the atmospheric circulation of high latitude is unusual from Northern Hemisphere on the cold wave weather in Northern Hemisphere, and the cold air of North pole broke out to meet the warm wet steam to take shape southwards. Though EI Nino event of will it be June 2009, still to hold issue, develop, it is relatively weak for it to associated with snow storm weather this time.

But some experts think this cold wave is shaken because of North pole to initiate. It is so as to spray the air current around the Arctic frigid zone, originally only blows a kind of cold air current to the east from the west, forced to advance under the extrusion of the Arctic hyperbar to the South.

Will it be November 1 last year such as Lenovo, Beijing meet first heavy snow since winter has set in, and the heavy snow come extraordinarily early compared with in the past, in weather of this sleet, the snow storm incidents of Hebei, Shanxi, Henan are up to 60 one is met, snowfall quantity and snow depth break through the extreme value of the same period of history. And broad sleet its forming reason this time, employ and serve chief of the office Zhang PeiQun and introduce according to the climate in the national climate centre, adjustment of circulation of the high latitude in mainly, meanwhile, the development of EI Nino event encounters cold current and snowstorm and attacks and plays a strong role to the high latitude in Northern Hemisphere area.

Why such severe cold as for this winter, Yan Hong says, this is because the great wave in the North Atlantic Ocean moves and becomes abnormal to a great extent, radial degree of atmospheric circulation becomes large, the air current in the north and south is more active than before, take the southern steam to the North, the strong cold air in the North is to the south at the same time, changes in temperature air in the north and south crosses frequently. Extreme low-temperature weather and atmosphere and marine system overbalance there are very great relations.

The cold wave is a transient phenomenon in the global global warming

Following global global warming free discussion of Copenhagen, the severity of the global global warming problem has nearly already been rooted in the hearts of the people. And this time the broad low-temperature snow storm weather in Northern Hemisphere seems to let people have a layer of doubts in the heart even more, why is cold wave ice and snow weather of global warming the more frequent?

According to Sun Jun's explanation, " the global warming is a great background, large stage, more extreme weather is only a fluctuation under this great background. "

"Under the background of the global warming, frequency and intensity happening in extreme weather climate incident will increase to some extent. High temperature, heat wave that the extreme weather has already included and high temperature has been relevant extremely, also cold wave, snow storm including and low temperature is relevant extremely. Climatic change, the total trend the whole world leans towards warmly, the temperature is a bit high, but within a certain period, a certain area will have extremely cold weather incident that happen. Global warming is a main trend, but the weather change will exist and fluctuate, it is not steady development. " Sun Jun says.

"It is the temporary weather phenomenon under the background of the global warming that the cold wave appears on a large scale in Northern Hemisphere this time. " It is expressed that climatic change expert, man, academician of Chinese Academy of Engineering, of national climate centre of China Meteorological Administration gather together.

The expert says, because of the rising of the global temperature on average, cause a large amount of sea water to evaporate, the steam in the atmosphere increases, it is apt to form the snow storm that a large amount of steam meets cold current, and this is the reason why global global warming will present extreme weather such as the ice and snow weather instead.

The great global weather cause of lowering the temperature is still complicated and confusing

But report, there is the scientist that has new opinions on global climatic change according to the latest media, that is " The small glacier " Arrival of period. According to the report of Hong Kong " Star Island Daily News ", a group of international authoritative scientists declare, the cold wave in Northern Hemisphere is only a beginning to wreak havoc, the world will enter a " cold mode " One, temperature may be the downward trend in the next twenty or thirty years.

Inside the period that temperature drop, global the intersection of global warming and process that we pay close attention to the fact now will present, stop, reverse even perhaps. As to this change, scientists have proposed some following evidences.

According to relevant data, since 2007, sea-ice area in summer increased by 1,060,000 sq. km. at North pole, increasing degree exceeds 25%.

The intersection of the United Nations and inter-governmental the intersection of climatic change and the intersection of committee and main member one of, Lateef of Ji cloth Professor Mo say: "Until during 2000, the 20th century observation that ocean circulated naturally and study of early time to 1980, global global warming should be half it is caused by this kind of cycle in this period of time.

"Circulating now begins to reverse, so is unusually cold this winter, and such climate may present more and more next. This trend may last 20 years, even a longer time. The melting of glacier and sea-ice will be suspended, the global climate warming trend will be in suspending state. "

The face is great to think, the driving force of the global warming trend is the increase of the gas of the greenhouse, on condition that control the factor not to change here, the total trend of the global warming will not have great change; Moon, season, annual weather make a variation, exist really, these, and global climatic change is two different concepts, the weather of short time makes a variation and is basically made of natural factor. Certainly, this relates to great background of the global warming too, namely global global warming has increased the probability happening in extreme weather incident.

According to Britain " daily post ", some famous climatology home thinks after analyzing the natural cycle period of the sea water temperature of Pacific Ocean and the Atlantic Ocean, there is one's own changes in temperature cycle in the ocean, it was this cycle that influenced the global climate. They think, as the ocean is in " cold mode " When, the global it will become cold, as the ocean is in " warm mode " When, no matter there is greenhouse gas emissions, global temperature will all rise. Global warming had been in because of the ocean since the 20th century " The warm mode " China. The ocean will be entered now " The cold mode " ,So it will become colder next.

These new research and opinion let this great global weather cause of lowering the temperature seem complicated and confusing, as for global climate on earth how is the tendency, believe that also needs new evidence and more time to examine.

Global climate: Become warm or become cold?