[Objective[ The aim was to analyze the characteristics of climate changes in Zhucheng City in Shandong Province from 1961 to 2010. [Method] The temperature and precipitation in Zhucheng City from 1961 to 2010 were cho...[Objective[ The aim was to analyze the characteristics of climate changes in Zhucheng City in Shandong Province from 1961 to 2010. [Method] The temperature and precipitation in Zhucheng City from 1961 to 2010 were chosen to analyze its annual and seasonal changes based on linear trend estimation method. [ Result]The average temperature in recent 50 years rose at a speed of 0.383 ℃/10 a. The mean temperature in each season increased. As the temperature increase span in winter 〉 autumn 〉 spring 〉 summer, the mean precipitation in recent 50 years de- creased at a speed of 18.7 mm/10 a, increased in spring and winter but decreased in summer and autumn. Temperature reduced most distinctly in summer at a speed of 20.9 mm/10 a. The abnormal temperature reduction happened only once in Zhucheng in recent 50 years. Abnormal high temperature happened in seven years, after 1990s. In recent 50 years, only six years had abnormal precipitation and the annual total precipitation decreased, which indicated that the spatial distribution of precipitation was uneven. [ Conclusionl The study provided reference for the increasing accuracy of temperature and of precipitation report.展开更多
Using the data on the maximum wind speed within ten minutes every month in the period 1971-2009 in Zhucheng City of Shandong Province, we conduct statistical analysis of the maximum wind speed in Zhucheng City. The re...Using the data on the maximum wind speed within ten minutes every month in the period 1971-2009 in Zhucheng City of Shandong Province, we conduct statistical analysis of the maximum wind speed in Zhucheng City. The results show that over thirty-nine years, the annual maximum wind speed in four seasons in Zhucheng City tends to decline. The annual maximum wind speed declines at the rate of 1.45 m/s every 10 years. It falls fastest in winter, with decline rate of 1.73 m/s every 10 years; it is close to the average annual maximum wind speed in spring and autumn, with decline rate of 1.44 m/s and 14.8 m/s every 10 years, respectively; it falls slowest in summer, and the extreme value of the maximum wind speed occurs mainly in spring. The curve of changes in the monthly maximum wind speed in Zhucheng City assumes diminishing shape of "two peaks and one trough". We conduct preliminary analysis of the windy weather situation, and put forth specific defensive measures against the hazards of strong winds in the different periods.展开更多
文摘[Objective[ The aim was to analyze the characteristics of climate changes in Zhucheng City in Shandong Province from 1961 to 2010. [Method] The temperature and precipitation in Zhucheng City from 1961 to 2010 were chosen to analyze its annual and seasonal changes based on linear trend estimation method. [ Result]The average temperature in recent 50 years rose at a speed of 0.383 ℃/10 a. The mean temperature in each season increased. As the temperature increase span in winter 〉 autumn 〉 spring 〉 summer, the mean precipitation in recent 50 years de- creased at a speed of 18.7 mm/10 a, increased in spring and winter but decreased in summer and autumn. Temperature reduced most distinctly in summer at a speed of 20.9 mm/10 a. The abnormal temperature reduction happened only once in Zhucheng in recent 50 years. Abnormal high temperature happened in seven years, after 1990s. In recent 50 years, only six years had abnormal precipitation and the annual total precipitation decreased, which indicated that the spatial distribution of precipitation was uneven. [ Conclusionl The study provided reference for the increasing accuracy of temperature and of precipitation report.
文摘Using the data on the maximum wind speed within ten minutes every month in the period 1971-2009 in Zhucheng City of Shandong Province, we conduct statistical analysis of the maximum wind speed in Zhucheng City. The results show that over thirty-nine years, the annual maximum wind speed in four seasons in Zhucheng City tends to decline. The annual maximum wind speed declines at the rate of 1.45 m/s every 10 years. It falls fastest in winter, with decline rate of 1.73 m/s every 10 years; it is close to the average annual maximum wind speed in spring and autumn, with decline rate of 1.44 m/s and 14.8 m/s every 10 years, respectively; it falls slowest in summer, and the extreme value of the maximum wind speed occurs mainly in spring. The curve of changes in the monthly maximum wind speed in Zhucheng City assumes diminishing shape of "two peaks and one trough". We conduct preliminary analysis of the windy weather situation, and put forth specific defensive measures against the hazards of strong winds in the different periods.
