What caused the California fire?

The California fire is a famous disaster phenomenon. Not only because of its wide scope, it has a serious impact on life. Because it is a frequent phenomenon, it is burned every three to five years or even every year. So why is California on fire? Let's analyze its reasons.

The first is the climate. California has a Mediterranean climate. From June to May every year, California will be very hot and it won't rain. This is also the time when the famous California fire started to ignite. In the coastal area of California, there will be a trough of low pressure at high altitude in autumn and winter, which will form convection with the high pressure in the inland of California. This convection was stopped by the Sierra Nevada in eastern California, and the convective airflow was lifted to the top of the mountain. From the top of the mountain to the central valley. The wind speed increases instantly. Its instantaneous speed can reach more than 100 km per hour.

Secondly, the problem of local vegetation. Most of the vegetation in California is coniferous forest. The oil content of coniferous forests will be much higher than that of ordinary plants. Moreover, because of the climate mentioned above, there was no rain, which led to the dormancy of plants on the mountain. The water content in plants is very low. This is also an important reason for easy combustion. The canopy of these coniferous forests is progressive from low to high. Once a fire breaks out, it is easy to form a fire ladder, leading to forest fires. This is essentially different from deciduous forests. Before 1970s, in California, forests were mainly used to produce wood. Artificial logging makes trees sparse, and human activities reduce litter in the forest, which plays a certain role in fire prevention. However, in recent years, with the increasing requirements of environmental protection, forests are basically not allowed to be cut down, and the litter and dense trees on the ground have become the natural fuel for fires in California.

To sum up, California fires are an inevitable phenomenon under the blessing of dryness, heat, strong winds and abundant fuel, and they often come out at regular intervals, and California residents have become accustomed to it.