Records of people flow changes in the previous two World Expos and daily temperature records in this Shanghai World Expo.

Host country, city name type, theme of "ten thousand people in the sky"

20 10 China Shanghai world Expo synthesis 184 7500 forecast cities, make life better.

The theme of the Zaragoza World Expo held in Zaragoza, Spain in 2008 was water and sustainable development.

Integration of Aichi Aichi Earth Expo 2005 185 2200 Natural Wisdom.

The 2000 World Expo in Hanover, Germany, integrated 153 1800 human beings.

1999 Major of China Kunming Horticultural Exposition 95 1000 Man and Nature.

Except rainy days, the average temperature is above 30 degrees.

In a blink of an eye, August came to us. Looking back on July, I think what impressed everyone most was the high temperature and heavy rain.

Indeed, July this year began with the high temperature in the rainy season. At that time, due to the westward extension of the subtropical high, the rain belt moved northward to the Huanghuai basin, and Shanghai was on the northwest side of the subtropical high, with a relatively high temperature. The highest temperature on July 1-3 was above 36 degrees, with July 1 day and July 2 being above 37 degrees. However, this is only short-lived. Due to the persistence of strong meridional circulation, the subtropical high retreated eastward and the rain belt pressed southward, and there were two persistent precipitation in Shanghai on July 3-5 and July1-1-7 respectively. On the 4th to 5th, 1 1- 13 and 16, there were heavy rains. Due to the continuous erosion of precipitation, the temperature drops day by day, especially on July1-16, and the daily maximum temperature was below 30 degrees for six consecutive days, which also led to an average temperature of only 27.6 degrees in mid-July this year.

In July 17, the atmospheric circulation adjustment began, the subtropical high began to extend westward and gradually controlled the south of the Yangtze River, and the rain belt moved northward to Huanghuai. The real flowering in Shanghai was in July 18. In this way, the rainy season, which lasted 1 month, ended. Looking back at this meiyu period, although it has many characteristics, it should be said that it is typical in recent years. As can be seen from the above, the persistence and concentration of precipitation during the Meiyu period are very strong; High temperature and short-term intermittent precipitation are also normal features of Meiyu period.

After the rainy season, of course, it is sunny, hot and high temperature. No, July 18 and July 2 1-22 had three days of high temperature. However, due to the influence of tropical disturbance in the East China Sea, the easterly wind is relatively strong, so the duration of this high temperature is not long and the intensity is not great. The high temperature in the above three days is between 35 and 36 degrees. Later, due to the northward development of tropical disturbance and the coastal disturbance in Zhejiang, there were showers or thunderstorms in the city on July 25-27, and the temperature dropped below the high temperature line.

However, the tropical disturbance is only an episode in the dog days of midsummer, and it is fleeting. At the end of July, the subtropical high began to obviously extend westward to control most areas south of the Huaihe River in China, so Shanghai returned to high temperature in the last three days of July, and the highest temperature on July 3 1 day exceeded 37 degrees again. It can be seen that August, like July, was also kicked off by high temperature.