This article uses NCEP 1° × 1° grid point reanalysis data, conventional meteorological observation data, FY2G satellite TBB data, radar combined reflectivity data, ground-encrypted automatic station obs...This article uses NCEP 1° × 1° grid point reanalysis data, conventional meteorological observation data, FY2G satellite TBB data, radar combined reflectivity data, ground-encrypted automatic station observation data, etc., through the synoptic diagnostic analysis method for a comprehensive analysis of a large-scale underreporting of a strong convective weather process under weak water vapor conditions on the 13th April 2017. The results show that the severe convective weather process is affected by the short-wave disturbance in the northwesterly airflow, triggered by the uplift of the westerly trough, the mid-low shear line and the mesoscale front of the boundary layer in the dry northwest. The jet stream is also an important system for the development of this strong convective weather. In the case of weak water vapor and energy conditions, if there is strong dynamic uplift, vertical wind shear and large temperature differences, strong convection can still occur;the convection occurrence area corresponds to the high potential vorticity abnormal area. The movement speed and direction of the cloud cluster are also consistent with the movement of the high potential vorticity anomaly area;the potential vorticity anomaly will cause the cyclonic circulation to increase, and the upward movement will also increase, which is conducive to the development of strong convective weather. According to the position of the dew point front in the β mesoscale, the ground cold pool corresponds to the small value area of the convective cloud cluster TBB. The front of the cold pool is accompanied by a mesoscale ground convergence line, and the uplift is strengthened, which is conducive to the development and forward movement of thunderstorms;the outflow of the cold pool is guided by 700 hPa. When the wind direction is the same, the movement speed will increase, and the stronger the outflow, the faster the movement speed.展开更多
[Objective] The research aimed to study relation between energy consumption and climate change in China. [Method] Climate change characteristics from 1951 to 2009 in China were summarized. Economic and social developm...[Objective] The research aimed to study relation between energy consumption and climate change in China. [Method] Climate change characteristics from 1951 to 2009 in China were summarized. Economic and social developments in China in recent 50 years were analyzed from production and consumption amounts of the energy, energy source composition and energy consumption of the GDP （ten-thousand yuan）. Influences of the energy consumption and economic development on climate change were discussed. [ Result] Annual average temperature of China in- creased obviously from 1951 to 2009, and regional difference was distinct. Increasing trend of the temperature in the north of 35° N was bigger than that in the south. Increasing trend of the temperature in northeast China and Inner Mongolia reached 0.04 ℃/a. The average temperature from 1981 to 2009 was higher than that from 1951 to 1980, and the biggest difference value was more than 2.0 ℃. Mutation of Chinese energy produc- tion and consumption happened in 1985, but average temperature of China had an obvious mutation in 1989, showing temperature mutation lagged behind energy production and consumption mutation. Energy consumption of the GDP （ten-thousand yuan） decreased evidently from 1978 to 1997. Beginning from 1998, the decreasing pace slowed down markedly, and there was a rebound in 2003. Chinese new energy amount was increasing year by year. Because the total energy consumption amount was also increasing, new energy proportion had been maintained about one quarter. The energy consumption increasing model with energy consumption coefficient and the model without energy consumption coefficient were set up in this paper. It was found that Chinese energy structure changed a little after considering energy consumption coefficient. Proportion of the coal de- creased, while proportions of the oil, natural gas and electric power increased. Temperature changing trend was consistent with that of the economic development and energy consumption. Change trend of the average temperature basically presented good positive correlation with effective energy consumption amount, and the maximum correlation coefficient was 80%. [ Conclusion] The research proved the importance of developing clean ＆ efficient energy and carrying out low-carbon economy to relieve climate change of China. It was urgent to carry out low-carbon economy and transform economic growth manner.展开更多
文摘This article uses NCEP 1° × 1° grid point reanalysis data, conventional meteorological observation data, FY2G satellite TBB data, radar combined reflectivity data, ground-encrypted automatic station observation data, etc., through the synoptic diagnostic analysis method for a comprehensive analysis of a large-scale underreporting of a strong convective weather process under weak water vapor conditions on the 13th April 2017. The results show that the severe convective weather process is affected by the short-wave disturbance in the northwesterly airflow, triggered by the uplift of the westerly trough, the mid-low shear line and the mesoscale front of the boundary layer in the dry northwest. The jet stream is also an important system for the development of this strong convective weather. In the case of weak water vapor and energy conditions, if there is strong dynamic uplift, vertical wind shear and large temperature differences, strong convection can still occur;the convection occurrence area corresponds to the high potential vorticity abnormal area. The movement speed and direction of the cloud cluster are also consistent with the movement of the high potential vorticity anomaly area;the potential vorticity anomaly will cause the cyclonic circulation to increase, and the upward movement will also increase, which is conducive to the development of strong convective weather. According to the position of the dew point front in the β mesoscale, the ground cold pool corresponds to the small value area of the convective cloud cluster TBB. The front of the cold pool is accompanied by a mesoscale ground convergence line, and the uplift is strengthened, which is conducive to the development and forward movement of thunderstorms;the outflow of the cold pool is guided by 700 hPa. When the wind direction is the same, the movement speed will increase, and the stronger the outflow, the faster the movement speed.
基金Supported by Meteorological Science Research Item in Shanxi Province,China (SXKYBQH20116227)
文摘[Objective] The research aimed to study relation between energy consumption and climate change in China. [Method] Climate change characteristics from 1951 to 2009 in China were summarized. Economic and social developments in China in recent 50 years were analyzed from production and consumption amounts of the energy, energy source composition and energy consumption of the GDP （ten-thousand yuan）. Influences of the energy consumption and economic development on climate change were discussed. [ Result] Annual average temperature of China in- creased obviously from 1951 to 2009, and regional difference was distinct. Increasing trend of the temperature in the north of 35° N was bigger than that in the south. Increasing trend of the temperature in northeast China and Inner Mongolia reached 0.04 ℃/a. The average temperature from 1981 to 2009 was higher than that from 1951 to 1980, and the biggest difference value was more than 2.0 ℃. Mutation of Chinese energy produc- tion and consumption happened in 1985, but average temperature of China had an obvious mutation in 1989, showing temperature mutation lagged behind energy production and consumption mutation. Energy consumption of the GDP （ten-thousand yuan） decreased evidently from 1978 to 1997. Beginning from 1998, the decreasing pace slowed down markedly, and there was a rebound in 2003. Chinese new energy amount was increasing year by year. Because the total energy consumption amount was also increasing, new energy proportion had been maintained about one quarter. The energy consumption increasing model with energy consumption coefficient and the model without energy consumption coefficient were set up in this paper. It was found that Chinese energy structure changed a little after considering energy consumption coefficient. Proportion of the coal de- creased, while proportions of the oil, natural gas and electric power increased. Temperature changing trend was consistent with that of the economic development and energy consumption. Change trend of the average temperature basically presented good positive correlation with effective energy consumption amount, and the maximum correlation coefficient was 80%. [ Conclusion] The research proved the importance of developing clean ＆ efficient energy and carrying out low-carbon economy to relieve climate change of China. It was urgent to carry out low-carbon economy and transform economic growth manner.
