What is the altitude of Yan 'an?
Yan 'an is located in the middle reaches of the Yellow River and belongs to the hilly and gully region of the Loess Plateau. Yan 'an landform is dominated by loess plateau and hills. The terrain is high in the northwest and low in the southeast, with an average elevation of about 1200m. Baiyu Mountain in the north is 1600 ~ 1800 meters above sea level, and the highest point is Baiyu Mountain in Guwu Township, Wuqi County, with an altitude of 1809.8 meters. The lowest point is in Houerchuan, Jiyi Township, Yichuan County, with an altitude of 388.8m and a relative height difference of1421m.
The northern part is dominated by loess hills and gullies, accounting for 72% of the total area of the region; In the south, gullies in the Loess Plateau are dominant, accounting for19% of the total area; The Rocky Mountains in the whole area account for 9% of the total area. Ziwuling in the west, from north to south, forms the watershed between Luohe and Jinghe. It is one of the bedrock mountains above the Loess Plateau, with an altitude of 1500 ~ 1600 meters and a main peak of 1687 meters.
Huanglong Mountain in the east, generally north-south, with an altitude of 1500m and the main peak (Daling) with an altitude of1788.7 m; Laoshan Mountain in the central part is northwest-southeast, with an average elevation of 1400 meters, and the elevation of the main peak (Dadunliang) is 1464 meters. Huanglong Mountain and Laoshan Mountain are collectively called Liangshan Mountain, which constitute the skeleton of Yan 'an terrain.
Climatic characteristics
Yan 'an is a plateau continental monsoon climate, with semi-arid areas in the north and semi-humid areas in the south. Cold and dry in winter, long curing period; In spring, the temperature rises rapidly and is changeable, prone to frost, strong wind and dusty weather, and often spring drought; Warm summer, concentrated rainfall, intermittent drought, thunderstorms and occasional hail; In autumn, the temperature drops rapidly, with foggy, early frost and rainy weather.
The daily range is large, and the annual average daily range in the whole region is 10.9 ~ 14.9℃, with the largest in Zhidan and Ganquan and the smallest in Luochuan. In a year, the daily range from April to June is large, with an average of12 ~17℃; From July to September, the daily variation is small, with an average of 10 ~ 13℃. The wettability of h·h· Ivanov is between 0.4 1 ~ 0.79, and it is greater than 1.0 in most areas from July to September. 1 October1is between 0.6 and 1.0; 1 1 less than 0.6 by next June.
Reference to the above content: Baidu Encyclopedia-Yan 'an City