[Objective] The research aimed to analyze the variation trend of rainfall in Xingtai area of Hebei Province in recent 48 years. [Method] According to the annual and seasonal rainfall data in Xingtai, Nangong, Shahe an...[Objective] The research aimed to analyze the variation trend of rainfall in Xingtai area of Hebei Province in recent 48 years. [Method] According to the annual and seasonal rainfall data in Xingtai, Nangong, Shahe and Neiqiu during 1963-2010, by using the interannual variation rainfall line chart, trend chart and climatic variability, the variation trend of rainfall in Xingtai area in recent 48 years was analyzed. [Result] The annual rainfall in Xingtai area during 1963-2010 presented yearly decrease trend, and the decrease velocity was 18.0 mm/10 a. The annual rainfall in Xingtai, Nangong, Shahe and Neiqiu roughly presented same trend (linear decrease). Except spring rainfall in Xingtai area in recent 48 years slightly increased, the rainfall in summer, autumn and winter all presented linear decrease trend. The decrease velocity of summer rainfall was the maximum. The decrease of summer rainfall played decisive role in rainfall decrease of the whole year. The decrease trend of winter rainfall wasn’t as significant as that of autumn rainfall. [Conclusion] The research provided theoretical basis for studying climatic variation characteristics in Xingtai area under the climatic warming background.展开更多
[Objective] The research aimed to analyze the variation trend of temperature in Xingtai area in recent 48 years.[Method] According to the yearly and monthly average temperature data during 1963-2010 in Xingtai,Nangong...[Objective] The research aimed to analyze the variation trend of temperature in Xingtai area in recent 48 years.[Method] According to the yearly and monthly average temperature data during 1963-2010 in Xingtai,Nangong,Shahe and Neiqiu,the change trend of temperature in Xingtai area in recent 48 years was analyzed by using the line chart and trend chart of interannual variation average temperature,climate variability.[Result] The variation trends of annual average temperature,annual average maximum temperature,annual average minimum temperature and average temperatures in spring,summer,autumn,winter in Xingtai area in recent 48 years all presented the roughly same characteristics,which yearly rose.It embodied the climatic characteristics of global warming.The rise of annual mean temperature was because that the minimum temperature and winter average temperature rose.The continuous warm winter played the decisive role for the rise of annual average temperature.[Conclusion] The research provided the theoretical basis for understanding the variation characteristics of climate in Xingtai area under the climate warming background.展开更多
[ Objective] The research aimed to study climatic change trend in Xingtai City in recent 57 years. [ Method ] Based on climate data （ rain- fall, temperature, sunshine, relative humidity and ground temperature, etc. ...[ Objective] The research aimed to study climatic change trend in Xingtai City in recent 57 years. [ Method ] Based on climate data （ rain- fall, temperature, sunshine, relative humidity and ground temperature, etc. ） in Xingtai City during 1954 -2010, the climatic change trend in Xingtai City in recent 57 years was analyzed by using line chart, trend chart and climate variability. Moreover, the concrete characteristics of climatic change trend were discussed. [ Result] The annual rainfall in Xingtai City in recent 57 years presented obvious decrease trend, and the decrease velocity was 20.952 mrn/10 a. The annual average temperature, annual average maximum temperature and annual average minimum temperature all presented rise trends. The rise speed of minimum temperature was the fastest, and was followed by average temperature. The rise speed of maximum temperature was the slowest. The annual relative humidity decreased at the velocity of 1.460 %/10 a. The ground temperature of 0 cm presented rise trend, but the shallow-layer ground temperatures of 5 -20 cm all presented decline trends. The deep-layer ground temperatures of 0. 8 and 1.6 m both presented weak decline trends. The ground temperature of 3.2 m presented obvious rise trend. The annual total cloud amount in- creased at the velocity of 1.673 into/10 a. The annual sunshine hours decreased at the velocity of 100.600 h/10 a. The annual average and annual minimum atmospheric pressures both presented decline trends. The decline trend of annual minimum atmospheric pressure was very obvious, while the annual maximum atmospheric pressure presented obvious rise trend. [ Conclusion] The research provided theoretical basis for development and utilization of agricultural production resources in Xingtai City.展开更多
文摘[Objective] The research aimed to analyze the variation trend of rainfall in Xingtai area of Hebei Province in recent 48 years. [Method] According to the annual and seasonal rainfall data in Xingtai, Nangong, Shahe and Neiqiu during 1963-2010, by using the interannual variation rainfall line chart, trend chart and climatic variability, the variation trend of rainfall in Xingtai area in recent 48 years was analyzed. [Result] The annual rainfall in Xingtai area during 1963-2010 presented yearly decrease trend, and the decrease velocity was 18.0 mm/10 a. The annual rainfall in Xingtai, Nangong, Shahe and Neiqiu roughly presented same trend (linear decrease). Except spring rainfall in Xingtai area in recent 48 years slightly increased, the rainfall in summer, autumn and winter all presented linear decrease trend. The decrease velocity of summer rainfall was the maximum. The decrease of summer rainfall played decisive role in rainfall decrease of the whole year. The decrease trend of winter rainfall wasn’t as significant as that of autumn rainfall. [Conclusion] The research provided theoretical basis for studying climatic variation characteristics in Xingtai area under the climatic warming background.
文摘[Objective] The research aimed to analyze the variation trend of temperature in Xingtai area in recent 48 years.[Method] According to the yearly and monthly average temperature data during 1963-2010 in Xingtai,Nangong,Shahe and Neiqiu,the change trend of temperature in Xingtai area in recent 48 years was analyzed by using the line chart and trend chart of interannual variation average temperature,climate variability.[Result] The variation trends of annual average temperature,annual average maximum temperature,annual average minimum temperature and average temperatures in spring,summer,autumn,winter in Xingtai area in recent 48 years all presented the roughly same characteristics,which yearly rose.It embodied the climatic characteristics of global warming.The rise of annual mean temperature was because that the minimum temperature and winter average temperature rose.The continuous warm winter played the decisive role for the rise of annual average temperature.[Conclusion] The research provided the theoretical basis for understanding the variation characteristics of climate in Xingtai area under the climate warming background.
文摘[ Objective] The research aimed to study climatic change trend in Xingtai City in recent 57 years. [ Method ] Based on climate data （ rain- fall, temperature, sunshine, relative humidity and ground temperature, etc. ） in Xingtai City during 1954 -2010, the climatic change trend in Xingtai City in recent 57 years was analyzed by using line chart, trend chart and climate variability. Moreover, the concrete characteristics of climatic change trend were discussed. [ Result] The annual rainfall in Xingtai City in recent 57 years presented obvious decrease trend, and the decrease velocity was 20.952 mrn/10 a. The annual average temperature, annual average maximum temperature and annual average minimum temperature all presented rise trends. The rise speed of minimum temperature was the fastest, and was followed by average temperature. The rise speed of maximum temperature was the slowest. The annual relative humidity decreased at the velocity of 1.460 %/10 a. The ground temperature of 0 cm presented rise trend, but the shallow-layer ground temperatures of 5 -20 cm all presented decline trends. The deep-layer ground temperatures of 0. 8 and 1.6 m both presented weak decline trends. The ground temperature of 3.2 m presented obvious rise trend. The annual total cloud amount in- creased at the velocity of 1.673 into/10 a. The annual sunshine hours decreased at the velocity of 100.600 h/10 a. The annual average and annual minimum atmospheric pressures both presented decline trends. The decline trend of annual minimum atmospheric pressure was very obvious, while the annual maximum atmospheric pressure presented obvious rise trend. [ Conclusion] The research provided theoretical basis for development and utilization of agricultural production resources in Xingtai City.
