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高 原 气 象 44 卷
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Analysis on the Spatio-temporal Characteristics for Different
Types of Strong Winds over Yunnan

1， 2
1， 2
1， 2
MA Wenqian ， LI Huahong ， CHEN Xiaohua ， MIN Ying ， LI Yaosun ， HE Yu 1， 2
1， 2
1， 2
（1. Yunnan Meteorological Observatory， Kunming 650034， Yunnan， China；
2. Research Center for Disastrous Weather over Hengduan Mountains & Low-Latitude Plateau，
China Meteorological Administration， Kunming 650034， Yunnan， China）
Abstract： Based on multiple observations， 16778 strong winds with speed equal to or greater than 17 m·s from
-1
125 national meteorological stations over Yunnan from 2013 to 2021 are divided into 8 types： thermal low
winds， thunderstorm winds， local winds， cold-air winds， winds before southern trough， winds under 500 hPa
westerly jet， typhoon winds and winds after plateau trough. The characteristics of spatio-temporal distribution
and wind direction/speed of all types of winds except for the local winds are explored. The most frequent strong
winds over Yunnan are thermal low winds， followed by thunderstorm winds. The strong winds are mainly ob‐
served over the northwest， central， and eastern parts of Yunnan. Except for thunderstorm winds， the wind direc‐
tions of strong winds could be determined by the causes of their occurrence. The wind speeds mainly range from
level 7 to level 9， and the distribution of wind speeds which are equal to or greater than level 10 shows strong dis‐
continuity. Even though the frequencies of thunderstorm winds and winds before southern trough are less than that
of thermal low winds， the two types of winds have a higher ability to cause extremely strong winds. The annual
variation of occurring times shows that the winds mainly occur in winter and spring， with the most frequency in
March. The annual variation of occurring times of thunderstorm winds shows a bimodal structure with a main
peak in April and a sub peak in August. Meanwhile， the annual variation of occurring days of thunderstorm winds
also shows a bimodal structure， the occurring days of the sub peak in August are comparable to that of the main
peak in April， indicating that thunderstorm winds occurring in spring are relatively organized， while thunder‐
storm winds occurring in summer are relatively scattered. For the diurnal variation of occurring times， the thermal
low winds mainly occur in daytime， with the highest occurring frequency at 15:00 to 15:59 （Beijing time， the
same below）. The thunderstorm winds and winds before southern trough mainly occur in afternoon， with the high‐
est occurring frequency at 16:00 to 17:59. The cold-air winds mainly occur from the afternoon to the early morn‐
ing， with the highest occurring frequency at 18:00 to 19:59. The winds under 500 hPa westerly jet have two peri‐
ods with high frequencies， afternoon and early morning， and more winds occur in the afternoon. The typhoon
winds mainly occur in daytime， with the highest frequency occurring at 16:00 to 17:59. The winds after plateau
trough mainly occur in daytime and the beginning of the night， and more winds occur at 15:00 to 16:59.
Key words： strong winds； Yunnan； classification； spatio-temporal characteristics