The reason for the long and narrow tropical desert of South America

If you answer the questions in the exam, you should keep them short and highlight the main points. The key points are as follows, and points will be given when answered: 1

Located on the west coast of South America, the Andes Mountains run from north to south, with a narrow strip to the west of the mountain range and a vast Brazilian plateau to the east, which makes it difficult to exchange water and moisture between the east and west, so the climate is quite different (fundamental); 2.There is a strong cold snap from south to north on the west coast of South America - the Peruvian cold snap, which has the effect of cooling and dehumidifying the coast (key): 3

Under the influence of the equatorial downdraft and the subtropical high, the inner region of the world is inherently a subtropical desert zone: in summary, it is not surprising that this is a long and narrow desert. Hope it helps.

The tropical desert climate of the west coast of South America, which is closest to the equator in the world, is the result of a combination of natural factors. First of all, the 10·-30·region is mainly controlled by the amplitude of the Southern Hemisphere and the northeast trade winds from the Atlantic, and the amplitude is dry due to the downdraft. The northeast trade winds from the Atlantic Ocean bring moist water vapor to the east coast of the South American continent, forming a non-zonal tropical rainforest climate in the coastal plain of southeastern Brazil, but due to the obstruction of the Andes Mountains, the coasts of Chile and Peru on the west coast are leeward areas, so it is difficult for the trade winds to affect this place at this time. In addition, the cold current along the coast of Peru has reduced humidity and exacerbated the degree of dryness, resulting in a tropical desert climate closest to the equator and a narrow layout.

There are two main reasons for the narrow climate of the tropical desert on the western side of South America.

First, topographical reasons. Influenced by the Andes Mountains, the climate of South America is divided into two parts, east and west, and the climate types in the western Pacific coast are very narrow and distributed in a belt.

Second, it is affected by ocean currents. The Peruvian cold snap on the western Pacific coast has a "cooling and dehumidifying" effect on the coastal areas. In addition, the area is located on the leeward slope of the southeast trade winds, and the precipitation is decreasing.

The first reason is "topographic influence", we find that in the west side of South America, not only the tropical desert climate is distributed in a belt, but also the Mediterranean climate and the temperate oceanic climate are also distributed in a belt, so they all have a common reason, that is, they are affected by the Andes Mountains that run through the north and south on the east side. The high Andes Mountains divide the climate of South America into two parts, east and west, and the climate types in the western Pacific coast are very narrow and distributed in a band.

The second reason is the "influence of ocean currents", and we find that the latitude distribution of tropical desert climate in South America is extremely wide, from about 6°s to about 30°s, and it is obvious that the distribution of tropical desert climate extends greatly to lower latitudes. In other words, precipitation is also very scarce in these low-latitude areas, and this situation is mainly affected by the strong Peruvian cold current on the western Pacific coast, which has a "cooling and dehumidifying" effect on the coastal areas. In addition, the eastern Andes Mountains also block the southeast trade winds, making them on the leeward slope of the southeast trade winds, which further reduces precipitation in this area.

The tropical desert of southwestern North America is a dry and hot lead region, mainly found in the United States and Mexico. The climate of the region is shaped by a combination of factors.

First of all, the region is located north of the equator, close to the line of the tropical zone, and thanks to the influence of the tropical high pressure belt, the air sinks faster, resulting in an increase in surface pressure and a decrease in precipitation. This is one of the main reasons for the tropical desert climate.

Secondly, the area is surrounded by mountains such as the Colorado Plateau and the Sierra Nevada of Siena, which make it difficult for moisture to flood into the area. At the same time, the blocking of the mountains will also cause precipitation to be released on the side of the mountains, making the tropical desert region drier.

Third, the region is affected by the westerly wind belt, and the cold and dry winds blowing from the Pacific Ocean make precipitation more scarce in the region. At the same time, atmospheric circulation in the region will gradually dry out the air, further exacerbating the drought in the region.

Finally, human activities are also contributing to climate change in the region. For example, overexploitation of groundwater resources has led to a drop in the water table, affecting the growth of vegetation on the surface, resulting in extreme dryness of the land, further exacerbating the drought in the region.

Considering the above factors, the climate of the tropical deserts in southwestern North America is characterized by dryness, high temperatures, low precipitation, and large variations in temperature between day and night. For the inhabitants and the ecology of the region, such climatic conditions have brought great challenges and tremors.

The high altitude is due to the natural formation of silver paddles.

The high altitude of the desert zone in South America is due to the largest plateau in the world: the Brazilian Plateau, located in the middle of South America, and the middle section of the Hemege Andes Mountains, which is close to the middle of South America.

The desert zone of South America is located in the southern part of South America, while the Andes Mountains are located in the middle, because it is blocked by the Andes Mountains, the southern part becomes a windswept slope with little precipitation, forming a desert zone.

1) The Tropic of Cancer traverses the middle of the continent, and most areas are controlled by the subtropical high pressure all year round, and it is not easy to precipitate due to the sinking of the airflow. (2) The contour of the Australian continent is relatively complete, there are no large bays deep inland, and the continent is wide from east to west and narrow from north to south. (3) The terrain of the mountainous watershed is close to the eastern Pacific coast, which narrows the influence range of the southeast trade winds and the warm current of eastern Australia, so that the rainy area is confined to the eastern Pacific coast, while the precipitation in the vast inland and western regions is scarce.

4) Lihe, the vast central and western regions, the terrain is flat and does not have a lifting effect. The western Indian Ocean coast blows away from the land wind, and there is a cold current from Western Australia along the coast, which has the effect of cooling and dehumidifying. So the Australian desert area is particularly large, and it goes straight to the west coast.

1. In summer, the high altitude of the Acacia area is an anticyclonic situation, and the low layer is a significant thermal low pressure, which is low and high, which is not easy to cause rain, so precipitation is scarce.

2. This area is located on the northwest side of the Deccan Plateau and is less affected by the southwest monsoon, that is, the southwest monsoon is difficult to reach;

3. Due to the over-exploitation of the blind friend, the primeval forests of ancient times were destroyed, and the gods and the ground lacked plant protection.

What are the characteristics of the climate distribution of tropical deserts in South America?

The tropical desert climate is long and narrow from north to south and close to the equator.

subtropical high pressure zone control or southeast trade leeward slope; There is a cold snap passing along the coast; The north-south Andes Mountains cling to the coast.

What are the causes of the rainforest climate in north-east Australia?

East of Madagascar, southeastern Brazil, east of Central America.

The Amazon Plain of Ponju in South America and the southeastern coastal region of Brazil both have tropical rainforest climates, but what are the reasons for the differences?

The Amazon Plain in South America is controlled by the equatorial low pressure all year round, and updrafts prevail, forming a tropical rainforest climate.

The southeast coastal region of Brazil has low latitude and high temperatures; Warm currents pass through on the east side; It is located on the windward slope of the southeast trade wind, and it is rainy on many terrains.

What is the difference in climate between the two sides of the Andes south of 40°s in South America?

The eastern side is a continental climate in the shelter zone; The western side has a temperate oceanic climate.

What is the reason?

Blocked by the Andes Mountains, the west side is a prevailing westerly windward slope, with terrain and rain, and a temperate oceanic climate; On the east side, the leeward slope of the prevailing westerly wind has little precipitation, forming a continental climate.

The tropical desert climate is distributed on the north and south sides of the savannah, mainly the Sahara Desert and the Kalahari Desert in Africa, the Arabian Desert in West Asia, the Fengyan Desert in Western Australia in Oceania, the California Desert in North America, and the Atacama Desert in South America.

There are three main reasons for this:

First, it is controlled by the subtropical high pressure zone. The subtropical high is a dynamic high pressure.

Second, it is controlled by the drying trade winds. The trade wind is a directional wind blowing from the subtropical high pressure zone to the equatorial low pressure zone, and due to the rotation of the earth, the wind direction is roughly deflected, and it deviates to the right in the northern hemisphere, becoming the northeast trade wind. In the Southern Hemisphere, it deviates to the left and becomes the southeast trade wind. The western coast of the continent in the subtropical region of the northern hemisphere is on the leeward side of the northeast trade winds, and the east coast of the continent is on the windward side of the northeast trade winds.

Thirdly, it is affected by the cold snap. Ocean currents have a great impact on the climate, and the cold current has the effect of cooling and dehumidifying the area through which it flows, and the warm current has the effect of warming and humidifying the area through which it flows. In the subtropical region, the west coast of the continent is affected by cold currents, so precipitation is scarce and the climate is arid. The east coast of the mainland is affected by the warm current, so there is more precipitation.

As for the causes of the tropical desert climate in the subtropical region, in addition to being affected by the subtropical high pressure or dry trade winds, it is also related to the fact that it is far from the ocean and less affected by the ocean.