"Atmosphere and Atmospheric Movement" PPT download of the surface environment from the perspective of the earth's sphere (Lesson 3 Thermodynamic Circulation)

"Atmosphere and Atmospheric Movement" PPT download of the surface environment from the perspective of the earth's sphere (Lesson 3 Thermodynamic Circulation)

Part One: Learning Objectives

1. Draw a simple schematic diagram to understand the formation process of atmospheric thermodynamic circulation, and explain phenomena such as urban heat island effect, land and sea thermodynamic circulation.

2. Learn to interpret isobars and isobaric surface diagrams.

Atmosphere and Atmospheric Movement PPT, Part 2: Sorting out the teaching materials and laying a solid foundation

1. Cause of formation: _____________.

2. Formation process

The details are as shown in the figure below (fill in the hot and cold conditions and air pressure near the ground in the figure.)

Atmosphere and Atmospheric Movement PPT, Part Three: Exploring Key Points to Improve Literacy

Research point: Thermodynamic circulation

Inquiry guide

A harmonious society is deeply rooted in the hearts of the people, and "creating a harmonious city" is the goal pursued by every city. A geography research study group conducted research on the "urban heat island" phenomenon.

1. Try to analyze the reasons why the temperature in the urban area is higher than that in the suburbs, forming an "urban heat island".

Answer: Urban areas have a concentrated population and developed industries. Residential life, industrial production, and transportation consume a large amount of fossil fuels and release a large amount of man-made heat. Urban buildings are tall and dense, making ventilation and heat dissipation difficult.

2. How does the airflow between urban and suburban areas move near the ground?

Answer: Due to the high temperature in the urban area, the air flow rises and low pressure is formed near the ground. In the suburbs, due to the low temperature, the air flow sinks and high pressure is formed near the ground. Therefore, the near-surface air flow (i.e. wind) flows from the suburbs to the urban area.

3. Is it reasonable to build a satellite town or a factory that emits a large amount of air pollutants at location A in the picture? Why?

Answer: Unreasonable. Atmospheric pollutants emitted from satellite towns or factories will flow from the near surface to the urban area due to the influence of thermodynamic circulation, exacerbating urban environmental pollution and mutual pollution.

Core summary

1. The formation process of thermodynamic circulation

Uneven heat and cold near the ground → Vertical movement of airflow (rising or sinking) → Difference in air pressure on the horizontal plane between near the ground and high altitude → Horizontal movement of the atmosphere → Thermodynamic circulation is formed in high and low spaces. As shown below:

2. Several common forms of thermodynamic circulation

(1)Sea and land breeze

(2)Valley wind

(3)urban style

method techniques

Interpretation method of "three relationships" in thermodynamic circulation

(1) The relationship between temperature and air pressure: when the temperature near the ground is high, the air expands and rises, forming low pressure, and high altitude forms high pressure; when the temperature near the ground is low, the air cools and sinks, forming high pressure, and low pressure forms at high altitude (as shown in the figure A, B, and C above) shown in three places).

(2) The relationship between wind and air pressure: In the horizontal direction, wind always blows from high pressure to low pressure (as shown in ①②③④ in the figure above).

(3) The relationship between the convexity and concavity of the isobaric surface and the level of air pressure: The convexity of the isobaric surface toward the high point is high pressure, and the concave toward the lower part is low pressure. It can be vividly remembered as "high convex and low concave" (as shown in the figure below).

Track training

(2019·Final term, Xicheng District, Beijing) The picture on the right shows the grass "bent" by the sea breeze in the coastal areas of Fujian, my country. Read the picture and answer questions 1-2.

1. Which of the following can correctly illustrate the causes of wind direction?

Analysis: According to the data, the wind blows from the ocean to the land. Since the specific heat capacity of water is greater than that of land, the ocean heats up slowly during the day, forming high pressure, and wind blows from the ocean to the land, so B is correct.

2. The prevailing wind direction in this area throughout the year also changes seasonally due to the temperature difference between the sea and the land. The prevailing wind blows from the ocean to the land

A.Spring B.Summer

C.Autumn D.Winter

Analysis: In summer, the land heats up faster than the ocean, forming a thermal low pressure near the surface. Wind blows from the ocean to the land, but the opposite is true in winter. In spring and autumn, the temperature difference between sea and land is small, and the wind direction is not obvious. Therefore B is correct.

Atmosphere and Atmospheric Movement PPT, Part 4: Class Drills and Knowledge Implementation

The picture below is the "Schematic diagram of urban heat island circulation". Read the picture and answer questions 1-2.

1. Which statement about urban heat island circulation is correct?

A. In urban areas, the temperature near the ground is high and the air pressure is high.

B. It is not conducive to the diffusion of urban air pollutants

C. Precipitation in urban areas is less than in suburban areas

D. Green belts can improve the atmospheric environment in urban areas

Analysis: In the urban heat island circulation, the temperature near the ground in urban areas is high and the air pressure is low, A is wrong.

It is conducive to the diffusion of urban air pollutants, B is wrong.

The airflow in urban areas rises, while the airflow in suburban areas sinks. There is more precipitation in urban areas than in suburban areas. C is wrong.

Green belts can trap smoke and dust, and can improve the atmospheric environment in urban areas, D is correct.

2. Which of the following measures to reduce the urban heat island effect is correct?

A. Increase the area of ​​hardened pavement in urban areas

B. Reduce urban green area

C. Increase air conditioning usage rate

D. Improve energy efficiency

Analysis: To reduce the urban heat island effect, the area of ​​hardened pavement in urban areas should be reduced. A is wrong.

Increase urban green area, B is wrong.

The air conditioning usage rate should be reduced, C is wrong.

Energy utilization efficiency should be improved and polluting gas emissions should be reduced, D is correct.

The picture below is the "vertical distribution map of the isosurface of a certain element of the tropospheric atmosphere." Answer questions 3-4 accordingly.

3. If a, b, c, d, and e are different temperature values, then the correct value of the air pressure value is

A.A>B>C>D

B.B>A>D>C

C.A>B>D>C

D.B>A>C>D

Analysis: If a, b, c, d, and e are different temperature values, according to the vertical distribution of temperature, it can be seen that the temperature is a>b>c>d>e. From this, it can be seen that the temperature in place B is high and the air pressure is low, and the temperature in place A is low. The air pressure is high. Combined with the principle of thermodynamic circulation, it can be seen that the air pressure values ​​​​in the four places are A>B>D>C.

4. If a, b, c, d, and e have different air pressure values, then the direction of airflow movement between places A, B, C, and D is

A.A→B→D→C→A

B. D → C → A → B → D

C. B→A→C→D

D. B→A→C→D→B

Analysis: If a, b, c, d, and e have different air pressure values, then place B has high pressure and place A has low pressure. According to the principle of thermodynamic circulation, the direction of air flow movement in the four places is B→A→C→D→B.

Keywords: Free download of PPT courseware for compulsory course 1 of high school geography in the Lujiao version, PPT download of the atmosphere and atmospheric movement, PPT download of the surface environment viewed from the earth's sphere, PPT download of thermodynamic circulation, .PPT format;

For more information about the PPT courseware "The Atmosphere and Atmospheric Movements: Looking at the Thermodynamic Circulation of the Surface Environment from the Earth's Sphere", please click the Atmosphere and Atmospheric Movement ppt: Looking at the Surface Environment from the Earth's Sphere ppt Thermodynamic Circulation ppt tag.

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