Ocean Network News Guangzhou into autumn into a lonely? It's possible. Because of the recent rise in temperature, the autumn process has "reversed", and there are variables in whether the autumn date this year is october 17, which was originally judged.
China has strict standards for the division of seasons, that is, calculating the sliding average temperature of 5 days based on the temperature sequence of the current year constitutes a sliding average temperature series, and when the sliding average temperature sequence is lower than 22 °C for 5 consecutive days, the first date below 22 °C in the corresponding temperature series of the year is used as the autumn start date.
Based on the data from the Guangzhou Observatory, on October 17, guangzhou experienced a temperature below 22 °C. After the climate temperature fluctuations and the attack of a cold air, the temperature in Guangzhou continued to be depressed, and from October 21, there was a series of sliding average temperatures below 22 °C, which met the requirements of the seasonal division standard. Of these sequences, the first date below 22°C is October 17.
According to the climate season division standard, if the start date of the initial judgment is more than 15 days earlier than the usual date, a second judgment is required to finally determine the start date of the season. If the sliding sequence after the date of the initial judgment does not meet the seasonal indicator, the date of the indicator needs to be calculated again, and when the cumulative number of days to meet the seasonal indicator between the two consecutive processes is greater than or equal to the number of days that are not satisfied, the start date of the initial judgment is taken as the start date, otherwise it is determined by the starting date of the second judgment.
The autumn season in Guangzhou is November 9. Therefore, whether October 17 this year will enter the autumn, there must be a second judgment. After October 17, the sliding average temperature series did not meet the target. From October 29, the series of sliding average temperatures for three consecutive days was above 22 °C. Subsequently, although the temperature dropped slightly, the target requirements have not yet been met again. In recent days, the weather has been warm, and many small partners have changed back to short sleeves during the day, giving people the feeling of "entering autumn, but not fully entering", and whether the sliding average temperature sequence can be lower than 22 ° C for 5 consecutive days is still unknown. If the requirements are not met this time, I am afraid that we will have to wait until the new cold air arrives before calculating. According to the forecast, from November 7 to 9, Guangzhou will be affected by strong cold air, and the average daily temperature will drop by 8 °C to 10 °C.
Of course, from the current situation, from October 17 to today, the number of days with a daily average temperature below 22 ° C is more than that of 22 ° C, whether it is really "reversed" depends on the temperature development in the next few days.
Text/Guangzhou Daily New Flower City reporter YeKas
Photo: Su Yunhua, reporter of Guangzhou Daily And New Flower City
[ Editor: Ho Wen-yong ]