Region Introduction
This area is part of the southeastern edge of the Qinghai-Tibet Plateau and the Hengduan Mountains. The ground altitude is 4000-4500 meters. It is divided into two parts: the northwest Sichuan Plateau and the western Sichuan Mountains. The terrain of the northwest Sichuan Plateau slopes from west to east and is divided into hilly plateau and high plain. The hills and valleys alternate with each other, the valleys are wide and the hills are round, sparsely arranged, and widely covered in swamps. The plateau swamps distributed in Zoige, Hongyuan and Aba are the largest swamp zones in southern my country. The mountains in western Sichuan are high in the northwest and low in the southeast. According to the depth of cutting, it can be divided into alpine plains and alpine canyon areas. The main mountain ranges are Min Mountain, Bayan Har Mountain, Munimangqi Mountain, Daxue Mountain, Queer Mountain and Shaluli Mountain. Gongga Mountain, the main peak of the Snow Mountains, is 7,556 meters above sea level. It is not only the highest peak in Sichuan, but also a world-famous peak.
Aba Prefecture, Garze Prefecture, and the western part of Liangshan Prefecture all belong to the Western Sichuan Plateau. Their climate characteristics are as follows:
The temperature in Aba Prefecture decreases from southeast to northwest and decreases with altitude from low to high. . The hilly plateau in the northwest has long, cold winters and cool, humid summers, with an average annual temperature of 0.8°C to 4.3°C. The mountainous area has cool summers, cold winters and springs, distinct dry and wet seasons, and an average annual temperature of 5.6°C to 8.9°C. In the alpine valley area, as the altitude changes, the climate shows obvious vertical differences from subtropical zone to temperate zone, cold temperate zone and frigid zone.
The climate of Garze Prefecture is a plateau monsoon climate, which is complex and diverse, with significant regional differences. It spans six latitudes from north to south. As the latitude increases from south to north, the temperature gradually decreases. Within the six latitudinal distances, the average annual temperature differs by more than 17°C. In the alpine canyon area, there is a huge difference in height between the foot of the mountain and the top of the mountain, and the climate also changes with height, with a difference of 20℃-30℃. The average annual temperature in each county seat is between 15.4℃ and 1.6℃. From Luding County, which is 1,321 meters above sea level, to Shiqu County, which is 4,200 meters above sea level, the altitude difference is 2,879 meters. The latitudinal distance is about 3 degrees, and the average annual temperature difference reaches 17°C. The average annual temperature is below 8℃ in most areas, with the highest temperature (hilly plateau areas and central alpine areas) below 30℃, and the lowest temperature (in most areas) below -14℃, with most areas in the north and Litang in the south The temperature in high-altitude areas such as Daocheng and Daocheng is below -20°C, the Shiqu can be as low as -37.7°C, and the annual precipitation is 325-920 mm. The annual sunshine hours are 1900-2600 hours, and the total annual radiation is generally 120-160 kcal/cm2. The average frost days over the years range from 18 to 228. There is no absolute frost-free period.
Liangshan Prefecture has a subtropical monsoon climate. In most areas, the four seasons are not distinct, but the dry and wet seasons are distinct, with warm winters and cool summers. In the dry season, the sunshine is long. The annual average temperature is 14℃~17℃, the sunshine hours are 2000~2400 hours, and the total annual sunshine radiation is 120~150. Kcal/cm2; annual rainfall 1000-1100 mm; frost-free period 230-306 days.
Notes
Self-driving tours in Western Sichuan are becoming more and more popular, but people who go to Western Sichuan for self-driving must pay attention to the prevention of altitude sickness. It is recommended to bring quick-acting anti-altitude reaction products. It can prevent altitude sickness, and on the other hand, it can quickly relieve the symptoms of altitude sickness.