What's the difference between Chongqing and Zhongjiang in Sichuan?

Climate difference between Chongqing and Zhongjiang in Sichuan: 1. Brief introduction of Chongqing: 1. Chongqing is located in the southwest of Sichuan Basin in the transitional zone between the Qinghai-Tibet Plateau and the middle and lower reaches of the Yangtze River. It spans north latitude10511'-kloc-0/2', north latitude 28 10'-32 15', and borders Shaanxi and Hubei in the east. It is about 470 kilometers long from east to west and 450 kilometers wide from north to south, with a total area of 82,400 square kilometers.

2. The annual average temperature in Chongqing is 16- 18℃, Banan, Qijiang and Yunyang in the Yangtze River valley are above 18.5℃, and Qianjiang and Youyang in the southeast are 14- 16℃. Chongqing is rich in annual average precipitation, most of which is between 1 1,000 ~1350 mm, and the precipitation is mostly concentrated from May to September, accounting for about 70% of the annual precipitation. Most of the annual average relative humidity in Chongqing is 70%-80%, which is a high humidity area in China. The sunshine hours in the whole year are 65,438+0,000-65,438+0,400 hours, and the sunshine percentage is only 25%-35%, which is one of the regions with the least sunshine in China, with less sunshine in winter and spring, accounting for only about 35% of the whole year. The main climatic characteristics of Chongqing can be summarized as follows: warm winter and early spring, hot summer and cool autumn, four distinct seasons and long frost-free period; The air is humid and the precipitation is abundant; Weak solar radiation and short sunshine time; There are more clouds and less frost and snow; Light and warm water are in the same season, with remarkable stereoscopic climate, abundant climatic resources and frequent meteorological disasters.

3. The seasonal variation of Chongqing can be obtained by using the principle that the average temperature is divided into seasons (that is, the period when the average temperature is lower than 10℃ is winter, the period when the average temperature is higher than 22℃ is summer, and the periods between winter and summer are spring and autumn respectively). Most parts of the city enter the spring from the end of February to the beginning of March, and the southeast and higher-altitude areas wait around March 4, and the spring lasts about 70-85 days. Since mid-May, the city has entered summer one after another, and the southeast will enter summer at the latest in early June. Summer is the longest season in the whole year, generally 65,438+020-65,438+040 days, and 65,438+000 days in the southeast. In mid-September, autumn begins in the southeast, and autumn begins in the rest of the country at the end of September, lasting about 70-80 days in spring. Winter is generally in the first half of June, 65438+February, the southeast is earlier than the second half of 10, and the winter lasts for about 75-90 days, and the southeast and higher altitude areas can reach more than 100 days.

Chongqing is warmer in winter, with less frost and snow, more clouds and less sunshine. The average temperature in Leng Yue is 4-8℃, which is about 1-5℃ higher than that in Wuhan and Nanjing at the same latitude, and it is obviously warmer in winter. Because of the warm winter, the whole city of Chongqing is evergreen all the year round, and the evergreen broad leaves of the higher-lying Jinyun Mountain and Simian Mountain are also green and full of vitality all the year round. In the national sunshine distribution map, the sunshine hours in winter are the least. The sunshine hours in June 5438+ 10 are only 30-50 hours, which is less than 15% of the available sunshine hours. The number of frost days in Chongqing is the least in the same latitude area in China, with the average annual frost days of 1-5 days, and 8- 10 days in the southeast and higher altitude areas. There are few snowy days, except in the southeast and higher altitude areas, the average snowy day can reach 5- 15 days, and the average snowy day in other areas is only 1 day. Cloudy in winter is a major feature of Chongqing. June+February, 5438 (or June+10/October, 5438), with an average of 20-23 cloudy days and as many as 3-7 foggy days, so it is called "Fog Capital Chongqing".

5. There is a spring drought in spring, the temperature fluctuates greatly, there are many cold waves, and there are frequent winds and hail. Chongqing entered the spring from the end of February to the beginning of March, about a month earlier than Wuhan and Nanjing at the same latitude. The temperature rises, the warm air is active, and the cold air goes south, which is easy to form a cold wave. The frequency of cold wave in March and April (the average daily temperature dropped by more than 8℃ within 72 hours) accounted for 20.8% and 27.5% of the whole year respectively. Spring is the season with the most cold waves, with large temperature fluctuation and strong cooling intensity. The interaction of cold and warm air can not only cause strong cold wave, but also cause strong convective air such as strong wind and hail. The number of windy days in spring (March-May) is second only to July and August, accounting for about 30% of the whole year, and 70% of hail days are concentrated in March, April and May. The average temperature in spring in Chongqing is 12-22℃, with pleasant climate and blooming flowers, which is the golden season for tourism.

6. Summer is hot and sunny, with uneven precipitation and drought. Chongqing is famous for its "stoves" in summer. The extreme maximum temperature is 38-40℃, and even as high as 42℃ and 43℃ in some areas. The extreme maximum temperature of 43.3℃ occurred in Pengshui on July 27th, 197 1. The number of high temperature days with daily maximum temperature greater than 35℃ is one of the signs of heat. The average high temperature days in the lower-altitude areas along the Yangtze River, Jialing River and Wujiang River in this city are 30-40 days, which reflects that the high temperature in Chongqing is not only strong, but also lasts for a long time. July and August in midsummer are the seasons with the strongest sunshine in the whole year, with sunshine hours accounting for about 40% of the whole year and sunshine percentage reaching 50%. Summer is also the season with the most concentrated heavy rainfall time, such as heavy rain. The number of heavy rains in June, July and August accounts for 60%-70% of the total number of times in the whole year, and most of them occur from mid-June to mid-July and late August, which often leads to flash floods and river flooding, resulting in a large number of soil erosion, dangerous stones and house collapse. In summer, due to the high temperature, strong sunshine and extremely uneven distribution of precipitation, the summer drought climate of 10 is formed, in which 3-4 years are severe drought or severe drought, and the longest drought period is more than 70 days. However, from the agricultural climate, light, heat and water match synchronously in June, July and August, and the climatic conditions are superior, making Chongqing one of the granaries of Tianfu.

7. Chongqing is cool in autumn, with more rain and less light. In September, there is always an autumn rain, a cool trend. In early and mid-September, the average temperature varies by as much as 3.5℃, and summer soon turns to autumn, especially on rainy days. 10 in September, the average monthly rainy days are as many as 14- 18, while the sunshine hours are only half or even one third of those in August. Nevertheless, from late June 10 to1mid-October 10, there is often a sunny period with crisp autumn and clear weather, which is called "Xiaoyangchun".

Introduction to Zhongjiang: 1. Zhongjiang belongs to subtropical humid monsoon climate zone, with mild climate, four distinct seasons, long frost-free period, abundant rainfall and little sunshine. The annual average temperature for many years is 16.2 degrees, the annual extreme maximum temperature is 37.3 degrees, the annual extreme minimum temperature is -5.9 degrees, the hottest month appears in July-August, the monthly average temperature is 25.4 and 25.0 degrees, and the Leng Yue appears in 1 month, with the monthly average temperature of 5.6 degrees. The annual total precipitation is 9 18.2mm, and the rainfall is mainly concentrated in July and August, with monthly rainfall of 225 and 229 mm respectively. The months with the least rainfall are 12 and 1, and the monthly rainfall is about 6 mm respectively. The rainstorm period generally occurs from May to September, and the perennial rainstorm occurs at the end of June, early July and late August respectively. The duration of perennial rainstorm is from the end of May to the beginning of June and around mid-September. 1960-200 1 year, the total number of regional floods in the city is 44, and the number of regional floods in the whole year is 1 time. The total sunshine hours in the whole year are 1 148.9 hours. The most frequent wind direction is still wind with a frequency of 39%, and the second most frequent wind direction is north wind with a frequency of 14%.

2. The start and end date of smooth passing 10 degree is from mid-March to early May, and the start and end date of smooth passing 20 degree is late May, the earliest in Jintang is mid-May, and the latest in Dujiangyan is early June. Fog days last for more than two months throughout the year, with high incidence in autumn and winter, 1 1 to 65438+February. The frequency of severe spring drought is 32% in a year and 27% in a general year. The frequency in summer drought years is 63%, 39% and 24%. The number of thunderstorm days is 34, the first day is April 13, and the whole day is September 27th. The number of hail days is 0. 1 day.

Second, the main climate characteristics of each season:

Winter: There is no severe cold in winter, which is beneficial to the growth of Koharu and animal husbandry. The continuous foggy weather has a great influence on transportation and shipping, and the dryness in winter is more obvious.

Spring: The temperature rises earlier, which is beneficial to the growth of trees and spring crops. However, the sudden rise and fall is unstable, and it is prone to persistent low temperature or "late spring cold", which affects the timely sowing of crops in Da Chun or causes rotten seeds and seedlings.

Early summer: Moderate temperature and large diurnal range are conducive to the mature harvest of early spring crops, but frequent droughts in summer easily lead to water shortage for planting in Da Chun in hilly and tailrace areas. In early summer, disastrous weather such as hail and strong wind occurs from time to time, and sometimes long-term low temperature and continuous rainy weather have adverse effects on harvesting in Koharu, planting in Da Chun and tillering of rice.

Midsummer: The hot, rainy and sunny summer is the golden season for crop growth in Da Chun. However, frequent heavy precipitation weather is easy to cause waterlogging. At the same time, high temperature and high humidity are conducive to the occurrence and development of various pests and diseases.

Autumn: there is a short period of cool and rainy weather in autumn, and a long period of crisp weather in autumn.