Distribution characteristics of sea level air temperature in January and July in the Northern Hemisphere

The main characteristics of winter temperature distribution in my country:

The temperature in the north and south of my country in winter is very different. In winter, the sun shines directly on the southern hemisphere. The height of the sun at noon in the north is lower than that in the south. The day length is shorter than in the south. The sun height obtained is less than that in the south. At the same time, the winter monsoon intensifies the severe cold in the north. The lowest winter temperature in my country occurs in the Mohe area in northern Heilongjiang.

In winter, mainland my country is mainly controlled by polar continental air masses or modified polar continental air masses. There are mostly high-pressure ridges at high altitudes between 80 and 90°E, while high altitudes along the coast are often large troughs. The cold air continues to move southward, strengthening the cold high pressure on the ground (Mongolian high pressure), and the warm ocean is mostly controlled by low pressure. Airflow continuously flows from high pressure areas to low pressure areas, causing northwest, north and northeasterly winds to prevail in the lower troposphere in winter in my country. The cold high pressure on the polar continent and its accompanying polar front or sub-cold front are the main control system of my country's weather in winter. The weather and climate are characterized by low precipitation, low temperature and dryness. In particular, cold waves or strong cold air weather processes last for a long time and have a wide range of impacts. The accompanying strong winds and cooling are very harmful to industrial and agricultural production.