Based on the daily observation data of 824 meteorological stations during 1951-2010 released by the National Meteorological Information Center, this paper evaluated the changes in the heat and moisture conditions of c...Based on the daily observation data of 824 meteorological stations during 1951-2010 released by the National Meteorological Information Center, this paper evaluated the changes in the heat and moisture conditions of crop growth. An average value of ten years was used to analyze the spatio-temporal variation in the agricultural hydrothermal conditions within a 1 km2 grid. Next, the inter-annual changing trend was simulated by regression analysis of the agricultural hydrothermal conditions. The results showed that the contour lines for temperature and accumulated temperatures(the daily mean temperature ≥0°C) increased significantly in most parts of China, and that the temperature contour lines had all moved northwards over the past 60 years. At the same time, the annual precipitation showed a decreasing trend, though more than half of the meteorological stations did not pass the significance test. However, the mean temperatures in the hottest month and the coldest month exhibited a decreasing trend from 1951 to 2010. In addition, the 0°C contour line gradually moved from the Qinling Mountains and Huaihe River Basin to the Yellow River Basin. All these changes would have a significant impact on the distribution of crops and farming systems. Although the mechanisms influencing the interactive temperature and precipitation changes on crops were complex and hard to distinguish, the fact remained that these changes would directly cause corresponding changes in crop characteristics.展开更多
2005年11月21～24日区域气象资料通信网（RMDCN）向IP／MPLSVPN迁移研讨会（Workshop on the RMDCN Migration to IP／MPLS VPN）和RMDCN运行委员会（RMDCN Operation Committee）第10次会议在日内瓦WMO总部召开。国家气象信息中心网络...2005年11月21～24日区域气象资料通信网（RMDCN）向IP／MPLSVPN迁移研讨会（Workshop on the RMDCN Migration to IP／MPLS VPN）和RMDCN运行委员会（RMDCN Operation Committee）第10次会议在日内瓦WMO总部召开。国家气象信息中心网络与存储系统室郎洪亮同志作为中国气象局代表参加了这两个会议。展开更多
基金National Basic Program of China(973 Program),No.2012CB955800National Natural Science Foundation of China,No.41171438,No.41401504
文摘Based on the daily observation data of 824 meteorological stations during 1951-2010 released by the National Meteorological Information Center, this paper evaluated the changes in the heat and moisture conditions of crop growth. An average value of ten years was used to analyze the spatio-temporal variation in the agricultural hydrothermal conditions within a 1 km2 grid. Next, the inter-annual changing trend was simulated by regression analysis of the agricultural hydrothermal conditions. The results showed that the contour lines for temperature and accumulated temperatures(the daily mean temperature ≥0°C) increased significantly in most parts of China, and that the temperature contour lines had all moved northwards over the past 60 years. At the same time, the annual precipitation showed a decreasing trend, though more than half of the meteorological stations did not pass the significance test. However, the mean temperatures in the hottest month and the coldest month exhibited a decreasing trend from 1951 to 2010. In addition, the 0°C contour line gradually moved from the Qinling Mountains and Huaihe River Basin to the Yellow River Basin. All these changes would have a significant impact on the distribution of crops and farming systems. Although the mechanisms influencing the interactive temperature and precipitation changes on crops were complex and hard to distinguish, the fact remained that these changes would directly cause corresponding changes in crop characteristics.
文摘2005年11月21～24日区域气象资料通信网（RMDCN）向IP／MPLSVPN迁移研讨会（Workshop on the RMDCN Migration to IP／MPLS VPN）和RMDCN运行委员会（RMDCN Operation Committee）第10次会议在日内瓦WMO总部召开。国家气象信息中心网络与存储系统室郎洪亮同志作为中国气象局代表参加了这两个会议。
