How to describe climate characteristics and analyze climate causes (temperature, decline

Temperature: According to the specific value of monthly average temperature or related data, the main points of describing or comparing temperature characteristics are: overall level; Whether the annual variation of temperature is large or small (whether it is high temperature all the year round, cold all the year round, or obvious seasonal variation); Specifically, which month the temperature is high (summer) and which month the temperature is low (winter). Precipitation: according to the specific value of monthly precipitation or related data, the main points of describing or comparing precipitation characteristics are: annual precipitation; Whether the annual variation of precipitation is large or small; And the combination of precipitation and temperature (whether it is rainy all year round, rainy all year round, rainy in summer or rainy in winter); When comparing the two climate values, the scoring points are mainly in the above six aspects. In the comparison between maritime climate and continental climate, it is particularly important to grasp the interannual variation characteristics of temperature and precipitation.

(2) Compare the differences of climate characteristics between C and D in the picture, and analyze the reasons. C belongs to subtropical monsoon climate, with high temperature and rainy summer, mild and little rain in winter and abundant precipitation, concentrated in summer and autumn;

D belongs to Mediterranean climate, with hot and dry summer, mild and rainy winter, less precipitation, and more precipitation due to west wind in winter. 3030 00 NN 40 40 00 NN 90

90 00 WW North American key "3 lines and 2 points" Los Angeles 4040 00 NN The influence of North American topography on climate (in winter, the influence of North American topography on climate)

Take the season as an example) and the North American season as an example). It is found that North America has the largest land area, and the east and west banks are close to the great west.

The largest area, the east and west sides of which are close to the Western Ocean and the Pacific Ocean, should be the temperate ocean and the Pacific Ocean, and the temperate maritime climate should be dominant, but because of the dominant climate, it is because of both.

The vertically arranged tall Cordillera part is blocked by the vertically arranged tall Cordillera mountain system, and the Pacific warm and humid mountain system is blocked, so the Pacific warm and humid airflow can only affect the coastal areas.

The airflow can only affect the coastal area and cannot enter the inland. Therefore, temperate oceans cannot enter the inland. Thus greatly narrowing the scope of temperate maritime climate. The scope of foreign climate has been greatly reduced.

It means that the central part of the North American continent runs through the north and south, which means that the central part of the North American continent is a vast plain running through the north and south. Because of the vast plain, the terrain is high in the north and low in the south. Therefore, winter comes from the intense cold of the Arctic Ocean.

So in winter, the strong cold air from the Arctic Ocean can go south and the temperature drops suddenly. The air can go south and the temperature is sharp.

Falling, forming cold wave weather, making North America fall, forming cold wave weather, making winter in vast areas of North America generally cold. In vast areas, it is generally very cold in winter. It shows that the North American continent is in a cold and high pressure area in winter,

It means that the North American continent is in a cold and high pressure area in winter, and the dry and cold air flows from the mainland to the East China Sea, and the dry and cold air flows from the mainland to the coast of the East China Sea, which expands the temperate continental climate area.

Dada 30 30 00 NN 90 90 00 WW *** The main reasons for the same characteristics are different.

The precipitation in place B is more than that in place A, which is located on the east coast of the mainland and belongs to temperate monsoon climate. The influence of summer monsoon is short, and it is mainly influenced by dry airflow (winter monsoon) from the mainland. The coastal cold current passes by. B is located on the west coast of North America.

It belongs to temperate maritime climate and is influenced by the west wind from the ocean all the year round; The terrain is alpine plateau, which has obvious lifting effect on wet airflow; There is a warm current along the coast. (6 points)

What are the outstanding features of the Mediterranean climate in North America? The Mediterranean climate belongs to the west coast of the subtropical latitude continent, with the characteristics of rainy winter, dry summer, mild winter, cool coastal summer and hot and dry inland.

The Mediterranean climate zone in North America is only distributed in the narrow strip of the Pacific coast between 30 and 40 north latitude because of the barrier of the high Cordillera mountain system in the west. In winter here, under the control of westerlies and cyclones.

Active, winter rain generally accounts for more than 50% of the annual precipitation; In summer, because it is located at the eastern edge of the subtropical high in the North Pacific Ocean and controlled by the northeast trade wind, the weather is dry and stable, and the proportion of summer rain is less than 3%.

The drier the summer in the south. The annual rainfall is moderate, ranging from 300- 1 000mm, decreasing from north to south. Affected by California cold current, the summer temperature in coastal areas is not high, and the average temperature in July is 16 ~ 20, which belongs to the hot summer type. January is 8 ~ 12, so the annual range is very small. However, to the east of the coastal mountains and into the California Valley, due to the influence of the cold current, the average temperature in the hottest month in all cities in the valley is above 22, with an average of 30 ~ 35 in daily maximum temperature, with 27 days in July, 65,438+0931in Sacramento and daily maximum temperature in the western United States, and 65,438+06 days in August, which is the absolute highest. The west of Sacramento is not far from the Pacific Ocean, but the average temperature in the hottest month (July) is about 7 higher than that in San Francisco, so the temperature in the whole year is higher than that in cool summer. Due to the existence of the Mediterranean, the Mediterranean climate in southern Europe is more distinctive and wider than that in North America.