What does southerly weather mean?
Wind direction
Meteorologically, the direction in which the wind blows is determined as the direction of the wind. Therefore, wind coming from the north is called northerly wind, and wind coming from the south is called southerly wind. Meteorological Observatory When the station forecasts wind, when the wind direction swings left and right in a certain direction and it is uncertain, the word "bias" is used, such as northerly wind. When the wind force is very small, the word "wind direction is uncertain" is used.
The measurement unit of wind direction is expressed by azimuth. For example, on land, it is generally expressed by 16 azimuths, and at sea, it is mostly expressed by 36 azimuths. At high altitude, it is expressed by angle. To express wind direction by angle, the circumference is divided into 360 degrees. North wind (N) is 0 degrees (ie 360 degrees), east wind (E) is 90 degrees, south wind (S) is 180 degrees, west wind (W) is 270 degrees, and the rest of the wind directions can be calculated from this. As shown on the left As shown.
In order to express the frequency of wind in a certain direction, the quantity of wind direction frequency is usually used, which refers to the number of winds in a certain direction in a year (month) and the total number of winds in all directions. The percentage of times, that is:
Wind direction change = the number of occurrences of a certain wind direction/the total number of observations of the wind direction × 100%
From the calculated wind direction frequency, we can know which type of wind direction occurs in a certain area There are more wind directions, which wind direction is the least. According to observations, northerly winds (north wind, northeasterly wind, northwest wind) are more likely to blow in North my country, the Yangtze River Basin, South China and coastal areas in winter, while southerly winds (souther wind) are more likely to blow in summer. , southeast wind, southwest wind).
One of the instruments for measuring wind direction is the wind vane, which is generally 10-12 meters high from the ground. If there are obstacles nearby, its installation height must be at least 6 meters higher than the obstacles. meters or more, and the short stick pointing north should be facing north. Which direction the wind direction arrow points to indicates the direction of the wind blowing at that time. There is also a rectangular wind pressure plate on the wind detector (the heavy one weighs 800 grams, the light one weighs 800 grams. Weighing 200 grams), an arc-shaped frame is installed next to the wind pressure plate, with long and short teeth on the frame. The number of long and short teeth that the wind pressure plate raises indicates the strength of the wind. Nowadays, meteorological stations generally use the EIJ type designed and manufactured by my country. Electrically connect the wind direction and anemometer.
Moisture-proof measures in southerly weather:
1. Windows should be closed.
When the humid "Meiyu" comes, keep the windows in your home tightly closed. If you are worried about stale air, consider opening a window facing north or west for ventilation. This will help keep the indoor air and environment relatively dry.
2. Start the dehumidifier.
To prevent moisture in your home, you must not only pay attention to ventilation, but also rely on corresponding dehumidification equipment. As a high-efficiency, low-energy consumption environmentally friendly product, household dehumidifiers have a significant effect on reducing indoor air humidity. It can keep indoor air at a relatively stable humidity and improve people's quality of life.
3. Use desiccant.
Choose a special moisture-proof desiccant, which can dehumidify and dry. It is more suitable to be placed in "public places" in daily life such as living rooms, kitchens, and bathrooms. In addition, if it is used with a household dehumidifier, Used together, the effect of removing moisture will be more obvious.