I want to know the altitude and pressure in Hangzhou.

The center of Hangzhou map is located at 39 degrees north latitude and 1 16 degrees east longitude.

Hangzhou is surrounded by mountains in the west, north and northeast, and slowly inclines to the Bohai Sea in the southeast. The altitude of Hangzhou plain is 20 ~ 60m, and the mountain area is generally 1000 ~ 1500m. Dongling Mountain, which borders Hebei, is 2303 meters above sea level and is the highest peak in Hangzhou.

Annual mean air pressure

According to the record of Hangzhou Meteorological Observatory 196 1 ~ 1980, the annual average pressure in Hangzhou is101.6 hectopascals, which is lower than the standard pressure10/kloc-0. The average maximum pressure in 1953 and 1970 is10/6.5 hectopascals, and the average minimum pressure in 1974 is10/0.9 hectopascals. The maximum difference of annual average air pressure is 5.6 hectopascals.

Monthly mean air pressure. In a year, the monthly average air pressure in Hangzhou changes with the monthly average temperature. The lowest monthly mean air pressure appeared in July, which was 999.2 hectopascals, and the highest monthly mean air pressure appeared in June 5438+February and June 5438+1October, which was 102 1.6 hectopascals.

Extreme changes in air pressure. In winter, it is attacked by Siberian cold high pressure (strong cold wave), and the air pressure reaches the maximum. On February 2, Hangzhou was affected by cold high pressure, and the air pressure rose sharply to 1038.2 hectopascals. At the turn of autumn and winter, due to the strong typhoon, the air pressure has a minimum value. 1On the morning of August 2, 956, due to a strong typhoon in Hangzhou, the air pressure plummeted to 958.7 hectopascals, which was the first time in 40 years.