"Changes and Distribution of Temperature" Weather and Climate PPT Courseware 2

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"Changes and Distribution of Temperature" Weather and Climate PPT Courseware 2

1. The concept of temperature

Temperature: refers to the temperature of the atmosphere, generally expressed in ℃.

1. Observation of temperature

Tools: Thermometer

The temperature, which accurately reflects the weather conditions in a place, is measured by a thermometer placed in the shutter box of the meteorological observation instrument installed at the meteorological station.

The temperature is usually observed four times a day, usually at 8:00, 14:00, 20:00, and 2:00 Beijing time.

2. Average temperature P49

Daily average temperature: The average of temperature values ​​at different times of the day.

Monthly average temperature: Add the daily average temperatures for each day of the month and divide by the number of days in the month to get the average temperature for the month of the year.

The monthly average temperature that reflects the climate characteristics of a local area refers to the local meteorological observation records and the average temperature of the month over many years.

Annual average temperature: Add the average temperature values ​​for each month of the year and divide by 12 to get the average temperature for that year.

2. Changes in temperature

Discussion: Are there regular changes in temperature?

Earth's movement

rotation produces: phenomenon: produces the alternation of day and night

The revolution produces: phenomena: changes in the four seasons and the division into five zones

1. Diurnal changes and diurnal range of temperature P51

Diurnal temperature variation: Temperature variation over a one-day period.

Diurnal temperature range: the difference between the highest and lowest temperatures in a day.

Calculation formula:

Diurnal temperature range = maximum temperature - minimum temperature

2. Annual changes in temperature P51

Annual temperature changes: Temperature changes with a one-year cycle.

Annual temperature range: the difference between the highest monthly average temperature and the lowest monthly average temperature within a year.

Different characteristics of temperature changes in the four seasons in tropical, temperate and cold zones:

Tropical zone: Temperatures are high every month, and annual temperature ranges are small.

Temperate zone: The four seasons change significantly, and the annual temperature range is large.

Cold zone: The temperature is very low every month, but the degree of coldness varies from month to month.

3. Temperature distribution and influencing factors P52

1. Isotherm diagrams are usually used to represent the horizontal distribution of temperature.

Isotherm: A line connecting points with equal temperatures.

Isotherm map: A map with isotherms drawn on it.

2. Temperature distribution patterns and influencing factors

(1) How does the temperature change from the equator to the poles? What's the reason for the change?

(2) Point out the latitude range where the annual average temperature is higher than 20℃ and lower than -10℃ respectively.

Areas with average annual temperatures higher than 20°C: between the Tropic of Cancer and the South

Areas below -10℃: within the Arctic and Antarctic Circles

1. There is no snow on mountains located near the equator. Is this statement right?

2. "A mountain has four seasons, and the sky is different ten miles away." The influencing factors are:

A. Latitude factor B. Human factor C. Topographic factor

3. Many famous mountains in my country are summer resorts. The main reasons are:

A. The high terrain blocks the summer monsoon B. The forest is dense and the temperature changes little

C. The terrain is higher and the temperature is lower D. The scenery is beautiful

4． Many people in the Arab region like to sleep on rooftops. Why?

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Update Time: 2024-11-22

This template belongs to Geography courseware People's Education Edition Geography for Grade 7 Volume 1 industry PPT template

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