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Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (27): 152-158.doi: 10.11924/j.issn.1000-6850.casb17090072

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Characteristics of the High Temperature Heat Wave in Beibei of Chongqing in 1951-2016 and Its Impact on the Growth of Flowers and Trees

  

  • Received:2017-09-13 Revised:2018-08-29 Accepted:2018-08-06 Online:2018-09-19 Published:2018-09-19

Abstract: To have a deep understanding of the characteristics of high temperature heat wave in Beibei district of Chongqing and the impact on the growth of flowers and trees, the ground meteorological observation data of daily average maximum temperature and extreme maximum temperature in 1951-2016 were studied. Linear regression and mathematical statistics were combined to analyze the changing characteristics of days, frequencies and intensity of the high temperature and heat wave. The results revealed that there were significant inter-annual changes in high temperature days, high temperature heat waves, and the total effective accumulated temperature due to the high temperature in Beibei, with an upward trend in the entire fluctuation. Furthermore, the annual average of 32.5 days of high temperature ≥35℃ and 3.8 times of the high temperature heat wave were observed, and the annual average duration of high temperature heat wave was 24.7 days. Summer drought caused by the high temperature heat wave frequently occurred, within a period of five days among which the 3-day extreme maximum temperature was >35.0℃, the summer drought would affect the normal growth of flowers and trees. If the 3-day extreme maximum temperature was >40.0℃, the summer drought would severely affect the growth of flowers and trees.