February 19, the year of the dragon is the second solar term-the rain. The two days of in liuzhou, guangxi has not rain, appeared instead since the year of rare bright and beautiful weather. However, 20, liuzhou and start the evening a light mist, the experts say, it means "back to south day" again.

Back to south day have signs

  According to liuzhou meteorological station, the next three days, south by warm-moist air flow influence, and the temperature will have obvious picks up, is expected to reach the highest temperature will be 19 ℃. But warmer at the same time, water vapour in the air has not yet "retreat" meet the cold air and condensation, therefore also will appear with fog and rain.

  See the fog will alert "back to south day" appeared. Meteorological offices and officials said, in fact, "back to south day" is also a warning. Generally speaking, after a long time (more than three days) after the cold weather, if suddenly appear less than 1 km visibility of fog, and the weather forecast shows temperature will quickly picks up, this means that "back to south day" to come out.

Is prone to gas poisoning

  "Back to south day" is a kind of let a person feel uncomfortable weather, because the damp air makes the floor and furniture is wet, if to moistureproof securing doors and Windows, and easy to cause the gas poisoning. February 13, in liuzhou year for the first time since "back to south day", result the following evening to the next afternoon, amounting to nearly people gas poisoning. Close the window or not to close a window, in "back to south day" is a problem.

  Many people will feel very don't understand: is this all year round with gas, winter time use longer, why in the temperature rise to happen when gas poisoning? Weather experts explain, winter climate is dry, the air less water vapor, the north wind strong, good air flow, oxygen added in time, waste gas diffusion fast, so the gas poisoning is less; And "back to south day" low air pressure, humidity is big, weak south wind blow with a lot of water vapor move of the air, and burning gas consumed a certain range of oxygen, and the resulting carbon monoxide and waste gas and "hoarding" in this cannot leave, the human body can't breathe oxygen, but sucked into carbon monoxide, and easy to hypoxia poisoning.

Moistureproof ventilation have tips

  "Back to south day" how to both moistureproof and ensure the air? Experts say, play "time" and "location sent" two card can moistureproof, ventilation cake and eat it.

  The so-called "time", it is found in the morning fog diffuse and outside temperature is not low, to close doors and Windows, prevent moisture intrusion. At noon the temperature will reach the highest point of a day, then don't rush to open the window, because the temperature difference between indoor and outdoor also achieve maximum, open the window easier to lead "tide" home invasion. Afternoon at night the temperature fell to etc, then can will shut down a day of the Windows open. Now people in indoor activity is frequent, especially cooking, taking a bath, produce a lot of heat, indoor temperature and outdoor quite, can this time window is ventilated take a breath, also won't cause the object surface water vapor condense.

  "Poor orientation" is the edge of the south or southeast the Windows shut good, open the northwest edge of the north or the window. "Back to south day" in addition to outside south winds, the northern cold air at this time has not yet fully "withdrawal". Close window open south north window, can stop most of the water vapor, the north wind rise, and to take the dry residual moisture of the home.