What winds blow in summer and winter? geography

Southeast wind blows in summer and northwest wind blows in winter.

Causes of southeast wind blowing in summer and northwest wind blowing in winter;

Although part of China lies in the westerlies, China lies between the largest continent and the largest ocean in the world! Due to the difference of thermal properties between land and ocean, there is low pressure on the land and high pressure on the ocean in summer, so southeast wind blows in summer in our country.

In winter, the land is high pressure, the sea is low pressure, and the wind blows from high pressure to low pressure! Northwest wind blows in winter in our country. In addition, the winter and summer monsoon in China is alternately controlled, that is, the northwest wind and the southeast wind are alternately controlled throughout the year, with the northwest wind as the main wind in the winter half year (from the autumnal equinox to the vernal equinox of the following year) and the southeast wind as the main wind in the summer half year (from the vernal equinox to the autumnal equinox).

In addition, the northeast wind blows in winter and southwest wind blows in summer in southwest China, which is also caused by the difference of thermal properties between land and sea.

Extended data:

The formation of monsoon:

Monsoon is a kind of wind system with wide prevalence and obvious seasonal variation of wind direction. With the seasonal change of wind direction, the weather and climate also have obvious seasonal changes. The word "monsoon" comes from Arabic word "mausim", which means season. In ancient China, trade winds were called, which meant that the direction of this wind always changed with the seasons.

The main reason for the formation of monsoon is the seasonal variation of thermal circulation between land and sea. In summer, the heating of the mainland is stronger than that of the ocean, and the change of air pressure with height is slower than that over the ocean, so when it reaches a certain height, a horizontal air pressure gradient from the mainland to the ocean is generated.

Air points from the mainland to the ocean, and the ocean forms a high pressure, while the mainland forms a low pressure. Air blows from the ocean to the mainland, forming an airflow opposite to the high altitude, which constitutes the summer monsoon circulation.

In China, there are southeast monsoon and southwest monsoon. Summer monsoon is especially warm and humid.

Baidu encyclopedia-monsoon