The spring persistent rains（SPR）over southeastern China（SEC）are a unique synoptic and climatic phenomenon in East Asia.A former study has found that the southwesterly flow which lies on the southeastern flank of t...The spring persistent rains（SPR）over southeastern China（SEC）are a unique synoptic and climatic phenomenon in East Asia.A former study has found that the southwesterly flow which lies on the southeastern flank of the Tibetan Plateau（TP）is one of the deflected westerly flows of the TP,and it is suggested to be the direct climatic cause of SPR.This study found that the southwesterly flow is also highly correlated with the sensible heating of the southeastern TP in interannual variability,in addition to having a high correlation in seasonal variability.These facts suggest that the thermal forcing of the TP is another important climatic cause of SPR.Numerical sensitivity experiments further prove that the mechanical and thermal forcings of the TP are the climatic causes of the formation of the SPR.On the other hand,the Nanling Mountains and Wuyi Mountains（NWM）over southeastern China not only increase the SPR precipitation amount evidently,but also make the SPR rain belt move to the south by blocking the strong southwesterly flow.展开更多
The icing disaster data and field investigation data of conductor icing were analyzed,the results indicated that conductor icing is mostly mixed freezing of glaze and rime in Guangxi,it becomes more severe with the hi...The icing disaster data and field investigation data of conductor icing were analyzed,the results indicated that conductor icing is mostly mixed freezing of glaze and rime in Guangxi,it becomes more severe with the higher of latitude and the increasing of altitude;the thickness of windward side is larger than leeward side in the same elevation.The closer to reservoir and rivers,the more serious the icing degree is.When cold wave broke,southwest warm-moist airflow was transported like an endless stream to the upper air of South China and surface stationary front sustained in South China coast.The main reasons of coming into being conductor icing were a stable strong frontal zone sustained in the upper air in Guangxi and there was strong inversion layer in the middle and lower troposphere,at that time,it was easy to generate conductor icing.The terrain generated an important effect on conductor icing.展开更多
Climate change is the phrase used to describe long-term changes in temperatures and weather patterns. Changes in the atmosphere and their interactions with diverse geologic, chemical, biological, and geographic variab...Climate change is the phrase used to describe long-term changes in temperatures and weather patterns. Changes in the atmosphere and their interactions with diverse geologic, chemical, biological, and geographic variables are the main contributors to this cyclical adjustment of the Earth’s climate. Such changes may be induced purposefully, because of burning fossil fuels, clearing forests, and raising animals, or they may be natural, brought on by significant volcanic eruptions or variations in the sun’s activity. By significantly increasing the amount of greenhouse gases already in the atmosphere, this heightens the greenhouse effect and contributes to global warming. This work includes several additional theoretical and practical explanations of sustainable development. The theoretical work encompasses hundreds of researches that identify requirements for how development routes might satisfy sustainable development (SD) criteria using economic theory, complex systems approach, ecological science, and other techniques. The agreements made by the Parties in various nations across the world will consider a wide range of perspectives about what would be considered undesirable effects on the environment, the climate system, sustainability, economic growth, or food production.展开更多
基金support of the Chinese National 973 Program(Grant No.2006CB403600)the National Natural Science Foundation of China(NSFC)Project Nos.40875034,40810059005,40821092,and 40523001
文摘The spring persistent rains（SPR）over southeastern China（SEC）are a unique synoptic and climatic phenomenon in East Asia.A former study has found that the southwesterly flow which lies on the southeastern flank of the Tibetan Plateau（TP）is one of the deflected westerly flows of the TP,and it is suggested to be the direct climatic cause of SPR.This study found that the southwesterly flow is also highly correlated with the sensible heating of the southeastern TP in interannual variability,in addition to having a high correlation in seasonal variability.These facts suggest that the thermal forcing of the TP is another important climatic cause of SPR.Numerical sensitivity experiments further prove that the mechanical and thermal forcings of the TP are the climatic causes of the formation of the SPR.On the other hand,the Nanling Mountains and Wuyi Mountains（NWM）over southeastern China not only increase the SPR precipitation amount evidently,but also make the SPR rain belt move to the south by blocking the strong southwesterly flow.
文摘The icing disaster data and field investigation data of conductor icing were analyzed,the results indicated that conductor icing is mostly mixed freezing of glaze and rime in Guangxi,it becomes more severe with the higher of latitude and the increasing of altitude;the thickness of windward side is larger than leeward side in the same elevation.The closer to reservoir and rivers,the more serious the icing degree is.When cold wave broke,southwest warm-moist airflow was transported like an endless stream to the upper air of South China and surface stationary front sustained in South China coast.The main reasons of coming into being conductor icing were a stable strong frontal zone sustained in the upper air in Guangxi and there was strong inversion layer in the middle and lower troposphere,at that time,it was easy to generate conductor icing.The terrain generated an important effect on conductor icing.
文摘Climate change is the phrase used to describe long-term changes in temperatures and weather patterns. Changes in the atmosphere and their interactions with diverse geologic, chemical, biological, and geographic variables are the main contributors to this cyclical adjustment of the Earth’s climate. Such changes may be induced purposefully, because of burning fossil fuels, clearing forests, and raising animals, or they may be natural, brought on by significant volcanic eruptions or variations in the sun’s activity. By significantly increasing the amount of greenhouse gases already in the atmosphere, this heightens the greenhouse effect and contributes to global warming. This work includes several additional theoretical and practical explanations of sustainable development. The theoretical work encompasses hundreds of researches that identify requirements for how development routes might satisfy sustainable development (SD) criteria using economic theory, complex systems approach, ecological science, and other techniques. The agreements made by the Parties in various nations across the world will consider a wide range of perspectives about what would be considered undesirable effects on the environment, the climate system, sustainability, economic growth, or food production.
