According to the "Red Star News" report, on January 17, some netizens posted on the social platform that the rape flowers in Chengdu Chongzhou Five Star Village actually opened in the waxing moon, full of golden yellow, as if in the Spring march. Generally in previous years, the large-scale opening of rape flowers in large areas will not be until At least February and March, which is the middle winter period of the lunar month, and the rape flowers actually open in advance.
Is the global climate anomaly related to the volcanic eruption in Tonga?
From the Website of China Meteorological, it can also be found that in the next ten days, the snowfall in the north of the mainland and the rain in the south, followed by the opening of rapeseed wax in the moon, and heavy snow in the Sahara Desert, this global climate is so abnormal, is it really related to the Tonga volcano that erupted on January 15?
The volcanic eruption of Aha Apay Island in Tongahun is the largest volcanic eruption in the last 30 years, and NASA chief scientist James Gavin said that the Tonga eruption is equivalent to about 10 megatons of TNT explosive explosions, or 10 million tons of TNT equivalent, about 500 times the Hiroshima atomic bomb.
On January 19, 2022, China News Network published an article on the relationship between tonga volcanoes and global warming, and Zhu Congwen, deputy director and researcher of the Institute of Climate and Climate Change of the Chinese Academy of Meteorological Sciences, discussed the relationship between volcanic eruptions and global climate from multiple perspectives.
Will volcanic eruptions alter the global climate or even offset the effects of global warming?
The answer is yes, Zhu Congwen said that from the perspective of volcanic eruptions in history, the climate has changed dramatically, such as:
- The eruption of Mount Naki in Iceland in 1783 caused an unusually cold winter climate in Europe from 1783 to 1784;
- After the eruption of Mount Tambora in Indonesia in 1815, the average global temperature dropped by about 0.4 °C to 0.7 °C the following year, and many parts of the northern hemisphere suffered a "summerless year";
- In 1991, the average global temperature dropped by about 0.5°C months after the eruption of Mount Pinatubo in the Philippines
The reason is also easier to understand, the heat spewed out after the volcanic eruption will soon escape, and the volcanic ash will also settle, but the volcano also spews out a large amount of sulfur-containing aerosol, which will reflect the solar radiation that originally reached the surface, just like a translucent umbrella for the earth, and the result is that the earth obtains radiation energy reduction and a large cooling.
Director Zhu Congwen said that after a series of simulations and studies, the volcano will have a continuous impact on the future global and East Asian climate, and there will be a cooling effect of about 0.3 °C.
The average global temperature of the past 1,000 years has declined for a short period of time after 1800.
Because this eruption occurred in the South Pacific, but just around 21 degrees south latitude, here blowing southeast trade winds, these aerosols will first reach the Western Pacific Ocean, which has a relatively large impact on the climate of East Asia, reflecting sunlight, reducing the solar radiation obtained on the sea surface, thereby reducing the water temperature, there will be two consequences, one is that it may lead to the La Niña phenomenon caused by the high water temperature in the West Pacific, and the other low water temperature will weaken the intensity of the East Asian summer monsoon.
This will make the summer monsoon unable to penetrate deep into the interior of East Asia, the lack of warm and humid airflow, then the precipitation line to the south, the average temperature drop, etc. are the consequences, and the other is that these aerosols will then affect the world with the low latitude circulation, if the Tonga volcano continues to erupt, this impact may be very large.
Another question is: volcanic eruptions will reduce the temperature, so detonating volcanoes will not require energy conservation and emission reduction?
Theoretically, there is indeed nothing wrong with it, but Director Zhu also confirmed a problem, volcanic eruptions can not replace energy conservation and emission reduction, because global warming is not only warming, but also acid rain, ocean acidification and other issues, and volcanic eruptions will bring another serious problem that will exacerbate acidification.
The other is that even if the aerosol is artificially manufactured and the solar radiation intervention (SRM) is carried out to eliminate the sequelae of volcanic eruptions, Director Zhu also said that the SRM method is not enough, because it will change the temperature and precipitation distribution, and the aerosol mass cannot control the position, which may change the atmospheric circulation pattern, perhaps because the radiation inequality problem is more serious.
Do volcanic eruptions become colder or hotter?
I believe that many friends are a bit confused, the magma spewed by the volcano did not heat the earth, escaped, and part of it also radiated into space, which can be understood, the aerosol of the volcanic eruption reflects sunlight, which can also be understood, but the problem is why there will be a Siberian shield volcano eruption in the Triassic and Permian eras in geological history, causing an unprecedented greenhouse effect, allowing dinosaurs to occupy the historical stage, and there is an eruption of the Canadian Langlia Volcano 58 million years ago, and the temperature in the equatorial region is 5 to 10 ° C higher than now. The Titan Python was born.
Isn't that a contradiction? The answer is not contradictory, the aerosol effects of volcanic eruptions are short-term, such as several years, but the carbon dioxide emitted by volcanoes is long-term, and the volcanic ejecta contains water vapor (H2O), carbon dioxide (CO2), sulfur or as sulfur dioxide (SO2) (high-temperature volcanic gas) or hydrogen sulfide (H2S), etc., of which the proportion of carbon dioxide is very high, accounting for between 10 and 40%, and water vapor accounts for more than 60%.
Everyone knows that carbon dioxide is a greenhouse gas, but in fact, water vapor is also, the impact of these two greenhouse effects is long-term will affect the earth in decades or even hundreds of years, such as Langria Volcano, the impact time is 100,000 or even million years.
Therefore, the long-term effect is climate warming, if the volcanoes on the earth continue to erupt, the short term is colder, but the long term is hotter, this result may be somewhat counterintuitive, but it is a natural law.
What is the reason for the early bloom of canola flowers in Chengdu and the snow in the Sahara Desert?
The question of volcanoes affecting the climate is a bit confusing, but whether it is short or long-term, it will not affect the earth in such a short period of time, after all, this requires a cumulative impact, but the answer to the question of whether it is flowering or snowing is global warming, which is a counterintuitive answer.
Chengdu canola blooms in the month
Some professionals say that Chengdu's rapeseed flowers are indeed rape blossoms, but these rape flowers are "wild", that is, the seeds of rape flowers planted in the field are naturally multiplied, and the flowering period is mainly affected by the ambient temperature, and the specially grown rapeseed is still in the long-leaf stage.
Many friends may not understand this problem, rapeseed seeds fall in the soil, as long as the temperature and humidity are suitable for germination, the temperature is suitable for flowering, and the planted rapeseed seeds, not to the planting season will not be sown into the soil, this is human intervention, because now the flowering will encounter frost, a large number of yield reductions, but "wild rape" does not matter, natural growth.
Of course, another problem is that this year is another warm winter, or half a warm winter, Xinhua News Agency published an article on December 29, 2021 "1 °C high!" The national average temperature in 2021 hit a record high" reported:
The national average temperature in 2021 (as of December 28) was 10.7 °C, 1.0 °C higher than usual, the highest since 1961
Since the beginning of winter, in addition to a few snowfalls and cooling, Sichuan has been rainy or warm in winter at other times, and the average temperature is about 0.2 °C higher than in previous years, which does not look high, but it is enough for plants to perceive changes in temperature.
Why does it snow in the Sahara Desert?
On July 10, 2021, CCTV reported that an Algerian camel was stunned by the heat on the side of the road, and the well-wisher gave it a bottle of mineral water before barely getting up, according to the data, the ground temperature was close to 60 ° C, and the heat was so hot that the camels could not eat it.
However, the location of the snowfall is in the northwest of Algeria in the town of Ain Sefra, where the altitude is more than 1,000 meters, the latitude reaches 32.77 degrees, the minimum temperature reaches minus zero, there is no problem, if in China, it should be in the location of Fuyang, Anhui, the snow is also normal, but Algeria belongs to the desert climate, it is difficult to have precipitation.
Only after global warming, the era of abundant water vapor in the atmosphere will arrive here to form snowfall, and from the perspective of the time of snowfall in history, it is almost synchronous with the time of global warming, with several rains in 1979, 2016, 2018 and 2021 and 2022, accounting for 3/4 after 2016.
Earth's climate is indeed becoming increasingly anomalous, but it is not caused by the Tonga volcano.