Some people say that there will be an acid rain process today until the 28th, so we can't get caught in the rain. Is it true?/You don't say.

Acid rain SMS is pure nonsense! Please read the following article: Acid rain short message arouses public concern /20 10-04-23 08:50:43 Qianlong. com "Please don't get wet from today to the 28th. Acid rain once in 750 years has a high probability of getting skin cancer after getting wet. Because of the volcanic eruption in Europe ... "Yesterday (April 22nd), there was a moderate rain in this city. At the same time, such a short message that the rain is strongly acidic due to volcanic ash has also spread among the citizens, causing some citizens' concerns. "Iceland's volcanic eruption has nothing to do with acid rain in Beijing. It' s simply nonsense! " Zhang Mingying, a senior engineer of the Municipal Meteorological Bureau, said, "Yesterday (April 22), the rainfall meteorological department measured a PH of 6.23, which is close to the normal value, and there was no acid rain at all." Ms. Zhang said in the hotline that she just went to work yesterday (April 22) morning and received a text message from a friend on her mobile phone, which read, "Please don't get wet from today to the 28th. Acid rain once in 750 years has a high probability of getting skin cancer after getting wet. Because of the eruption of a volcano in Europe, a large number of sulfides were sprayed into the sky, which was strongly acidic. Please pay attention and forward this information to people around you. " Ms. Zhang said that although she had some doubts about this, she forwarded the information to several friends. Zhang Mingying, a senior engineer of the Municipal Meteorological Bureau, told reporters that there are obvious loopholes in the statement that Iceland erupts volcanic ash and Beijing drops acid rain. First, there must be atmospheric circulation to bring volcanic ash to China or Peking. According to the monitoring of China Meteorological Bureau, Iceland's volcanic eruption is powerful and has a wide range of influence, which affects almost the whole European aviation industry, but the core area of its influence is neighboring Northern Europe. So far, the monitoring and reports of meteorological departments in European countries have not shown strong acid rain. From common sense analysis, the transmission distance of sulfur dioxide is very limited. After thousands of kilometers of high-altitude transmission, the impact on China is very limited, while Beijing's relative latitude is low, and the possibility of impact is even smaller; Secondly, sulfide will precipitate during diffusion. Not only will precipitation release this acidic substance, but even the dust falling in the air will have acidic substances. If Iceland's volcanic ash spreads to China, the sulfide will be greatly reduced due to sedimentation, and the possibility of acid rain will not be great. There is no scientific basis that Icelandic volcanic ash spread between networks can cause "once-in-750-year acid rain" in China. "Where did the definition of time like 750 years come from?" Zhang Mingying told reporters that there is a gradual process for human understanding of weather conditions, including acid rain. Although predecessors recorded the past weather phenomena more or less, there was absolutely no record in 750 years. I really understand weather phenomena for less than a hundred years. The 750-year concept of time can only spread on the Internet. Yesterday (April 22nd), it did rain in Beijing. The maximum rainfall point in the city is about 15mm, while the average rainfall in the city is10 mm. This kind of spring rain is undoubtedly a happy rain for Beijing, which has been dry, but it is too "wrong" to label it "acid rain" to nourish this good rain in Beijing. Zhang Mingying introduced that in order to monitor acid rain, Beijing set up an acid rain observatory in the southern suburbs. Yesterday's monitoring data showed that the PH value of rainwater was 6.23, which was close to normal. The definition of acid rain is: acid precipitation with PH less than 5.65 is called acid rain, which is the pollution of acid gas in the atmosphere. Obviously, the monitoring data is the most authoritative, and the "acid rain once in 750 years" will be broken in front of this data.