What is the wind direction in Liao Hua area of Liaoyang in each season?

The measured records of the frequency changes in four monsoon directions show that the average maximum wind direction appears counterclockwise from spring to winter every year, followed by SW→S→SE→N, and the static wind (C) has the highest frequency. In spring (March-May), the north wind gradually weakens and the southwest wind strengthens, which is an important factor of spring drought. According to statistics, the southerly wind in spring accounts for about 38% of all wind directions. In summer (June-August), southerly winds are dominant in midsummer, with an occurrence rate of about 23%. The weakening of southwest wind, replaced by southeast wind, brings a lot of warm and humid ocean air, which is the key factor of precipitation in Liaoyang area. In August, the southeast wind gradually decreased, and the north wind appeared. In autumn (September-165438+1October), the north wind is dominant, and the southeast wind is maintained at165438+1October and weakened. In winter (12- February of the following year), the north wind is dominant, and the southeast wind still appears more, and there are more windless days, accounting for about 30%. In February, the southeast wind retreated slightly and gradually turned to southwest wind. The average maximum wind direction frequency of each month in the whole year is:

65438+ 10 month: C = 24 month: SW = 17

September: c = 23 Southeast

N }= 1 1

February: C = 2 1 June: SSE =15se =11n =13.

10 month: c = 20 newtons

SE }= 10

March: c = 15n = 13.

July: C = 18 Shanghai Stock Exchange

S }= 13

1 1 month: C = 17N = 15.

April: SW = 14 August: C = 25 N

SE }=9

65438+ February: c = 24 n = 13

Rose chart of monthly average wind direction frequency (natural environment figure 9)

The annual monthly average wind speed is 2.9 meters per second, with the maximum wind speed of 4.3 meters per second in April and the minimum wind speed of 2.0 meters per second in August. Over the years, the maximum average wind speed appeared in 196 1 year, which was 3.5 meters per second, and the minimum average wind speed appeared in 1977, which was 2.4 meters per second. Over the years, the wind speed has been weakening, from 1960 to 1970, the average wind speed is 3.2m per second, from 197 1 to 1980, the average wind speed has dropped to 2.7m per second, and it is still weakening in recent years.

1956—— 1988 average wind speed (natural environment table 14)

For many years, the maximum wind speed of each wind direction is south by southwest (SWS), with wind speed of 20.0m/s, followed by west by southwest (WSW), wind speed of 19.0m/s, south by southeast (SES), wind speed of 18.0m/s, east by northeast (ENE) and wind speed of 7.0 m/s.

Liaoyang Wangqing