The present study investigates the interdecadal variability of seasonal mean surface solar radiation over Northwest China using station observations from 1961-2003. Spring and summer surface solar radiation over North...The present study investigates the interdecadal variability of seasonal mean surface solar radiation over Northwest China using station observations from 1961-2003. Spring and summer surface solar radiation over Northwest China was lower in the late 1970s through 1990s than in the 1960s through the mid-1970s, and fall and winter surface solar radiation displayed similar patterns. These results indicate that the decrease in spring and summer surface solar radiation may be associated with increased low-cloud cover over Northwest China. Rainfall anomalies were closely related to the low-cloud cover over Northwest China and with the Northern Hemisphere circumglobal teleconnection in spring, summer, and winter.展开更多
Over the five years between the 18 th and 19 th National Congress of the CPC, the new generation of Chinese leadership, with Xi Jinping at the core, has proposed a series of ideas, theories, concepts and initiatives, ...Over the five years between the 18 th and 19 th National Congress of the CPC, the new generation of Chinese leadership, with Xi Jinping at the core, has proposed a series of ideas, theories, concepts and initiatives, built a whole set of organizational structures and mechanisms,enriched and improved foreign strategic plans, overcome a host of territorial and sovereign difficulties through the construction and use of the Belt and Road Initiative, breathed new life into head of state diplomacy and other diplomatic forms, and formulated China's international strategic thought and structure for the new era. These developments have positioned China as a great power and led to three major historic achievements, laying an important foundation for China to move from regional big power to global strong power. However, the time-space particularity of China's rise has meant that some structural issues cannot be solved easily, while some new problems are mushrooming. The 19 th National Congress of CPC set higher task objectives for China's international strategy in the new era,and this calls for China's international strategic circle to continue its innovation in both theory and practice.展开更多
Based on a 10-year simulation of six Regional Climate Models(RCMs) in phase II of the Regional Climate Model Inter-Comparison Project(RMIP) for Asia,the multivariate statistical method of common principal components(C...Based on a 10-year simulation of six Regional Climate Models(RCMs) in phase II of the Regional Climate Model Inter-Comparison Project(RMIP) for Asia,the multivariate statistical method of common principal components(CPCs) is used to analyze and compare the spatiotemporal characteristics of temperature and precipitation simulated by multi-RCMs over China,including the mean climate states and their seasonal transition,the spatial distribution of interannual variability,and the interannual variation.CPC is an effective statistical tool for analyzing the results of different models.Compared with traditional statistical methods,CPC analyses provide a more complete statistical picture for observation and simulation results.The results of CPC analyses show that the climatological means and the characteristics of seasonal transition over China can be accurately simulated by RCMs.However,large biases exist in the interannual variation in certain years or for individual models.展开更多
基金supported by the Special Scientific Research Project for Public Interest(Grant No.GYHY201006021)the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KZCX2-EW-QN204)+1 种基金the National Basic Research Program of China(Grant No.2009CB421405)the National Natural Science Foundation of China(Grant Nos.40905027 and 40730952)
文摘The present study investigates the interdecadal variability of seasonal mean surface solar radiation over Northwest China using station observations from 1961-2003. Spring and summer surface solar radiation over Northwest China was lower in the late 1970s through 1990s than in the 1960s through the mid-1970s, and fall and winter surface solar radiation displayed similar patterns. These results indicate that the decrease in spring and summer surface solar radiation may be associated with increased low-cloud cover over Northwest China. Rainfall anomalies were closely related to the low-cloud cover over Northwest China and with the Northern Hemisphere circumglobal teleconnection in spring, summer, and winter.
文摘Over the five years between the 18 th and 19 th National Congress of the CPC, the new generation of Chinese leadership, with Xi Jinping at the core, has proposed a series of ideas, theories, concepts and initiatives, built a whole set of organizational structures and mechanisms,enriched and improved foreign strategic plans, overcome a host of territorial and sovereign difficulties through the construction and use of the Belt and Road Initiative, breathed new life into head of state diplomacy and other diplomatic forms, and formulated China's international strategic thought and structure for the new era. These developments have positioned China as a great power and led to three major historic achievements, laying an important foundation for China to move from regional big power to global strong power. However, the time-space particularity of China's rise has meant that some structural issues cannot be solved easily, while some new problems are mushrooming. The 19 th National Congress of CPC set higher task objectives for China's international strategy in the new era,and this calls for China's international strategic circle to continue its innovation in both theory and practice.
基金supported by the National Natural Science Foundation of China (General Program,Grant No.40975048)the Strategic Priority Research Program-Climate Change:Carbon Budget and Relevant Issues of the Chinese Academy of Sciences (Grant No. XDA05090207)the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No.KZCX2-EW-202)
文摘Based on a 10-year simulation of six Regional Climate Models(RCMs) in phase II of the Regional Climate Model Inter-Comparison Project(RMIP) for Asia,the multivariate statistical method of common principal components(CPCs) is used to analyze and compare the spatiotemporal characteristics of temperature and precipitation simulated by multi-RCMs over China,including the mean climate states and their seasonal transition,the spatial distribution of interannual variability,and the interannual variation.CPC is an effective statistical tool for analyzing the results of different models.Compared with traditional statistical methods,CPC analyses provide a more complete statistical picture for observation and simulation results.The results of CPC analyses show that the climatological means and the characteristics of seasonal transition over China can be accurately simulated by RCMs.However,large biases exist in the interannual variation in certain years or for individual models.
