Advantages and disadvantages of measuring atmospheric temperature with louver box

Advantages: it can prevent sun and rain, and it can be ventilated; The sunlight in the shutter can't directly illuminate, and the thermometer reading is more in line with the actual temperature; The temperature fluctuation in the louver is smaller than that outside the louver; The deviation of the measured data is very small. The thermometer placed in the louver has a small deviation from the real value, while the thermometer placed outside has a higher temperature during the day and a lower temperature at night. Besides, the outside is easily affected by the weather. At noon, it may be direct sunlight, which makes the temperature higher, and geothermal energy also affects the change of thermometer, so the exact temperature should be based on the temperature of thermometer in the louver.

Disadvantages: Need to find a special venue. The louver box must be 1.5 meters above the ground, with a lawn below and no tall buildings or trees around.

Extended data:

The principle of blinds:

In order to make the measured temperature representative, a louver box is placed on the natural lawn, and the height of the thermometer placed in the louver box is 1.5m from the ground, which is the unified standard of the World Meteorological Organization. The data measured in this way represents the standard temperature in the natural state without any interference, that is, the temperature we see in the weather forecast.

The door of the louver opens to the north, because China is located in the northern hemisphere. Opening to the north can prevent the sun from shining directly on the instruments in the box during observation and recording, which will affect the observation results.

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