Is it humid in Jining City, Shandong Province?
Most areas in Gansu are below the 500mm isorainfall line, and the overall climate feature is drought. Compared with Jining, it is drier.
Jining is located in the continental monsoon climate zone of warm temperate zone. The climate is characterized by four distinct seasons, abundant sunshine, the same season of rain and heat, concentrated precipitation, alternating dry and wet, long frost-free period and occasional disasters. The average temperature over the years is 65438 03.6℃. The coldest month in a year is 65438+ 10, with an average of-1.7℃, and the hottest month is July, with an average of 26.8℃. The daily variation range of the average temperature is10.2 ~11.5℃. The agricultural year not lower than 0℃ is 296 days, and the average accumulated temperature is 5076.7℃. The growth period of thermophilic crops is not less than 10℃, with an average of 2 15 days and an average active accumulated temperature of 457 1.9℃. The overwintering period below 0℃ is about 70 days, and the negative accumulated temperature is117.5 ~172.5℃. Precipitation, the average rainfall over the years is 707.1mm. The annual maximum rainfall is 1394.8mm, and the minimum rainfall is only 285.6 mm. The summer rainfall is the largest, with an average of 44 1.7mm, accounting for 2.5% of the annual precipitation. Winter precipitation is the smallest, only 27.8 mm, accounting for only 4% of the annual precipitation. The average annual precipitation days are 6 1 ~ 85 days. Over the years, the first snowy day is in the beginning of 10/0 of/kloc-0+,and the last snowy day is in the middle of April at the latest. The average snowfall days are 6.6 ~ 12 days. The average snowfall is 20 mm, the maximum is 40-50 mm, and the minimum is less than 0.5 mm sunshine. The average sunshine hours over the years are 2406.8 hours, and the average annual sunshine hours are 2272.3 hours. In a year, the sunshine is the longest in summer and the shortest in winter. The monthly variation of sunshine length is the longest in June and the shortest in February. The average sunshine percentage over the years is 53 ~ 56%. Frost period: the average first frost day is 65438+1October 28th, the final frost day is April 1 1, and the frost-free period is 199 days. Over the years, the average freezing date of soil is165438+1late October, the thawing date is early March, the frozen soil period is 1 10, and the frozen soil depth is generally 20 ~ 30 cm.
The climate of Gansu province belongs to temperate monsoon climate, which has obvious characteristics of transition to continental climate. The province is dry with little rain and large temperature difference. The climate of the four seasons is characterized by: less rain and snow in winter and long cold time; In spring, the temperature rises rapidly and changes greatly; Summer temperature is high and precipitation is concentrated; The temperature drops rapidly in autumn, and the first frost comes early. The annual average temperature is roughly -0.3- 14.8℃, which is slightly the same as that in North China. /kloc-The annual average temperature is above 8℃ below 0/500m, and below 4℃ above 2,500m. From northwest to southeast, the coldest January average temperature is between-1 1.9-3.8℃, and the hottest July average temperature is between℃ from Qilian Mountain to Bailong River Basin. The frost-free period in the province is generally between 48 and 228 days. The annual precipitation in all parts of the province is 300 ~ 860 mm, decreasing from southeast to northwest. The precipitation in the west of Wushaoling is obviously reduced, and the precipitation in Longnan Mountain area and the east of Qilian Mountain is more. Affected by the monsoon, precipitation is mostly concentrated in June-August, accounting for 50-70% of the annual precipitation. The frost-free period in the whole province varies greatly from place to place. Longnan Valley generally lasts for about 280 days, and Gannan Plateau is the shortest. Only 140 days.
Mid-latitude monsoon climate
The temperate monsoon climate is located between Asia, the largest continent, and the Pacific Ocean, and the thermal properties of land and ocean are significantly different. In summer, the Eurasian continental depression is connected, the ocean subtropical high extends westward and advances northward, and the southeast monsoon from the subtropical high in the North Pacific brings abundant precipitation. The northwest monsoon from the powerful Mongolian high in winter affects the local area. Because the wind shear meets the requirements of monsoon, it is a monsoon climate.
In winter, influenced by the high latitude inland north wind, the polar continental air mass prevails here, which is cold and dry.
In summer, influenced by polar ocean air mass or denatured tropical ocean air mass, southeast wind and southeast wind prevail, with warm, hot and rainy seasons. The annual precipitation is about 1000mm, of which about two thirds is concentrated in summer (hot and rainy in summer and cold and dry in winter). There are four distinct seasons throughout the year and the weather is changeable. With the increase of latitude, the temperature amplitude in winter and summer increases correspondingly, while the precipitation decreases gradually.
Monsoon is a prevailing wind whose direction changes obviously with the seasons. The area affected by tropical monsoon climate is called monsoon area, on the contrary, the area not affected by tropical monsoon climate is called non-monsoon area.
Summer is hot and rainy, and winter is cold and dry. It is very hot in Leng Xia in winter, and it is also very hot when it rains. Temperate monsoon climate; The temperature is below 0 degrees in winter, and it rains the most in summer.
The four seasons are distinct, and the direction of winter and summer monsoon changes obviously.
It appears on the east coast of Eurasia near 35 ~ 55 north latitude, including the area north of Qinling-Huaihe line in eastern China, Korean Peninsula, northern Japan and southern Russian Far East. It is located in the east temperate zone of Eurasia, specifically in North China, Northeast China of China, Northeast China of Honshu, Hokkaido Island, most parts of the Korean Peninsula and the Russian Far East.
The east coast of Eurasia, south of the sub-frigid zone, north of Qinling-Huaihe River in China, east of the temperate semi-arid and arid zone, including Northeast China and North China, North Korea and Japan in 37 N, and south of the Far East of the former Soviet Union belong to the temperate monsoon climate zone. The northern boundary of this area is the southern boundary of the sub-cold zone, with the annual average temperature of 4℃ isotherm as the boundary; The southern boundary is based on the average temperature of 9.5℃ in eight months of the year, and it is the northern boundary of the subtropical climate zone.
In China, this boundary is roughly equivalent to the Qinling-Huaihe line, and it is also roughly consistent with the zonality. The western boundary of temperate monsoon climate extends along the northeast of Daxing 'anling to the eastern end of Waixing 'anling. Here, the boundaries between sub-frigid coniferous forest climate, temperate monsoon climate and temperate continental arid and semi-arid climate are relatively close. The land and sea distribution and topographic structure of East Asia have a great influence on the range of temperate monsoon climate, such as the northeast-southwest mountainous areas, which can prevent the deepening of monsoon forces.