Is it true that Apple's mobile phone shows that the temperature in Shanghai is 49 degrees Celsius?

As soon as we entered the dog days, the scorching sun hung high and the heat wave swept along with the midsummer. It seems particularly hot this summer. Pedestrians in the street are mixed with repressed sweat, and the sultry breath is constantly transpiration. The oblique shadow of deep clouds became a temporary shelter, and even cicadas became less interested in singing. It is reported that due to the influence of the subtropical high, many places have fallen into high temperature environment. Last summer, it was already very hot when the temperature reached 30 degrees, but in recent years, the temperature has continued to rise, and the high temperature of 40 degrees is not uncommon.

In recent days, some Apple users in Shanghai have found that the weather application that comes with the iPhone shows that the highest temperature will almost reach 50 C, and the temperature will soar directly outside the chart. Ultra-high temperatures such as 49 C in Putuo District and 47 C in Jing 'an District can be seen everywhere. At this time, Shanghai is more like a melting pot, which seems to be melted without evaporation. However, this is not the case. Shanghai Weather, the official Weibo of Shanghai Meteorological Bureau, responded to the feedback from netizens about the high temperature of nearly 50℃.

In this regard, the official said, "Many netizens asked about the temperature of the software that comes with the mobile phone. The temperature data provided in our service is the atmospheric background temperature measured by the standard meteorological station according to the unified technical standards, while some weather apps that come with mobile phone software do not use actual observation data, but use other data and means to estimate. Simply put, we have actual observation data, they don't! " The atmospheric background temperature is the temperature under the influence of human activities and other external factors, which can be measured by the thermometer in the louver. According to the regulations of the World Meteorological Organization, the louver box must be located on the open lawn 1.5 meters above the ground, and there must be no buildings or trees around it that block the wind and sunlight. Under the international standards, the measured data has great reference value.

The Meteorological Bureau can obtain the actual temperature data of the corresponding area, and the weather data source of iPhone comes from TWC Company of the United States. The temperature in some parts of China displayed in the application needs to be estimated by some technical means such as satellite data inversion and difference, rather than field observation, so the error is inevitable. First of all, it's fake. The temperature in Shanghai never reached 49 degrees yesterday. According to the data released by Shanghai Early Warning, the highest temperature at the national station was 40.2 degrees in Xujiahui yesterday, which was 42.4 degrees when the data of encrypted observation stations in various districts were counted. The accuracy of high temperature observation at this station is in doubt. So how to avoid this oolong incident? In fact, there are several public platforms for meteorological information in Shanghai, such as the official WeChat account, which can show the temperature, wind direction, precipitation and other puzzles in Shanghai.

The question is, where did the temperature displayed on Apple's mobile phone come from? According to the response of Shanghai Central Meteorological Observatory, some weather apps that come with mobile phone software do not use actual observation data, but use other data and means to estimate. Personally, I think it uses the extreme heat index of the somatosensory temperature Q or other calculation methods to estimate the temperature, rather than actually using the temperature of any observation station in Shanghai. In fact, when 40 degrees Celsius is combined with 40% relative humidity, the calculated thermal index is exactly 48 degrees.

If it is estimated together with other factors that affect the somatosensory temperature, such as headwind, it seems normal to calculate 49 or 50 degrees. Of course, there must be many people who believe this data. This is because the sunshine in Shanghai was brilliant yesterday, and the atmospheric permeability was extremely high, which made the sun radiate. Strong, people's skin receives more solar radiation, so there is a feeling of being baked with fever. Under a certain atmospheric humidity, people want to get rid of heat but sweat can't evaporate quickly, which makes their bodies feel extremely sultry, especially in urban areas. When the wind is still small, their body temperature will be reached by going up a flight of stairs.

Others say that stepping on the ground feels the soles of your feet burning. This refers to the "ground temperature", that is, the ground temperature. Because most urban roads are black asphalt roads, the heat absorption is very strong, and the heat transfer inside is not so fast. It is possible that the temperature will reach a very high value, such as 60 degrees, under the continuous heating of solar radiation.

However, after all, there are certain requirements for meteorological observation, which should be carried out in a ventilated louver at a height of 1.5 meters from the ground, and the underlying surface should be a carefully tended lawn. In fact, this temperature does not necessarily reflect the real somatosensory feeling, so it is necessary to incorporate the somatosensory temperature into the indicators such as shutdown and production suspension to some extent.

Of course, there is another problem. How long will this high temperature process last? Subtropical high. Firmly control the tropical ocean surface, typhoons are difficult to generate and move to East China; Mid latitude. Land strength is also strong, subtropical high, land height. The trend of "strong cooperation" and high latitude can be maintained. The shape is very stable, and there will be no sudden circular turning point for the time being. In this way, this high temperature process may last for at least ten days. Therefore, heatstroke prevention and cooling. Work is still essential.

49 must be fake. My highest display is 44. The temperature measuring device of our roof equipment shows 4 1. Just as many people question the accuracy of official data, this is unnecessary. On this day, if anyone has a brain, outdoor projects have basically stopped. It is also a major municipal project that can be started. As for various high-temperature subsidies, it is not the weather that determines whether the unit will give benefits. Not at 40 degrees, definitely not at 49 degrees. You think too much. No, the meteorological temperature in Shanghai can't be so high, but the ground temperature or body surface temperature will be so high.

Classic popular science works, many people sit in the office, are their brains broken and they can't feel the temperature? How about working outdoors for a while? I stayed in Suzhou, Shanghai for 8 years. No 10 years. I work in Shanghai and Suzhou. I can feel it. The temperature this year is indeed much higher than in previous years. Don't talk nonsense about high body temperature. I said there was no somatosensory temperature before. The temperature this year is really bad. Even my brother, a worker downstairs, would rather play cards than go out to work. If the temperature is high or not, just go downstairs and compare with previous years.