Within the framework of forcing/dissipation KDV dynamics, the effect is numerically studied of successive east-travelling troughs on quasi-stationary high's ridges downstream. Results show that two types of low-fr...Within the framework of forcing/dissipation KDV dynamics, the effect is numerically studied of successive east-travelling troughs on quasi-stationary high's ridges downstream. Results show that two types of low-fre- quency transiency are available, depending on the intensities of down-drifting troughs. One is that transiency occurs in strength, i.e., the ridge undergoes transient change in intensity with unchanged position; the other is that transiency takes place in pattern, viz., the breakdown of the quasi-stationary character of the ridge's posi- tion, meaning that the ridge is replaced by a trough, followed by multiple transformation between ridge and trough.展开更多
Luonan Basin, formed during Neo\|tectonic movements, is one of the small block basins in East Qinling Mountain. Three faults, Tieluzi Fault, Dajing\|Guojiayuan Fault and Beisi Fault bound it. The west part of the basi...Luonan Basin, formed during Neo\|tectonic movements, is one of the small block basins in East Qinling Mountain. Three faults, Tieluzi Fault, Dajing\|Guojiayuan Fault and Beisi Fault bound it. The west part of the basin is higher than the east part. The elevation, usually more than 1100meters in the west, decreases gradually to less than 800meters in the east. The Cenozoic deposit in Luonan Basin is thin in the west part and becomes increasingly thick towards the east part. The total thickness of both the Eogene and the Neogene is only more than 100meters at Dajing. At Duishan, a place close to Luonan county town, it is about 400meters, and at Gucheng, it becomes nearly 1750meters. The strata crop out in the west part of the basin, usually the Eogene and the Neogene, are older than those in the east part which are usually the Quaternary deposits. The pattern of the Cenozoic deposits in Luonan Basin is similar to that in Shangzhou Basin (Li Kaoshe, personal communication), a basin locating just to the south of Luonan Basin.展开更多
The international relations and political ecology in the Middle East have undergone significant changes after the US-led Iraq War in 2003,which shattered the geo-political balance,the traditional religious patterns an...The international relations and political ecology in the Middle East have undergone significant changes after the US-led Iraq War in 2003,which shattered the geo-political balance,the traditional religious patterns and military existence in this region.Of particular note is the“Eastward Movement”of the geo-political center of the Middle East.In other words,the six countries in the Persian Gulf area2 are playing a more powerful and more influential role as a regional entity.The influence expansion of the Gulf is driven by the radical changes of the international environment on the one hand and its efforts for stability and development on the other.The rise of the Gulf has an immediate impact on the future development of the Middle East/Arab area.Besides,it will also influence the political stability and economic development of the whole world.展开更多
基金This work is supported in part by National Natural Science Foundation of Chinain part by the State Meteorological Adiministration Climate Research Funds.
文摘Within the framework of forcing/dissipation KDV dynamics, the effect is numerically studied of successive east-travelling troughs on quasi-stationary high's ridges downstream. Results show that two types of low-fre- quency transiency are available, depending on the intensities of down-drifting troughs. One is that transiency occurs in strength, i.e., the ridge undergoes transient change in intensity with unchanged position; the other is that transiency takes place in pattern, viz., the breakdown of the quasi-stationary character of the ridge's posi- tion, meaning that the ridge is replaced by a trough, followed by multiple transformation between ridge and trough.
文摘Luonan Basin, formed during Neo\|tectonic movements, is one of the small block basins in East Qinling Mountain. Three faults, Tieluzi Fault, Dajing\|Guojiayuan Fault and Beisi Fault bound it. The west part of the basin is higher than the east part. The elevation, usually more than 1100meters in the west, decreases gradually to less than 800meters in the east. The Cenozoic deposit in Luonan Basin is thin in the west part and becomes increasingly thick towards the east part. The total thickness of both the Eogene and the Neogene is only more than 100meters at Dajing. At Duishan, a place close to Luonan county town, it is about 400meters, and at Gucheng, it becomes nearly 1750meters. The strata crop out in the west part of the basin, usually the Eogene and the Neogene, are older than those in the east part which are usually the Quaternary deposits. The pattern of the Cenozoic deposits in Luonan Basin is similar to that in Shangzhou Basin (Li Kaoshe, personal communication), a basin locating just to the south of Luonan Basin.
文摘The international relations and political ecology in the Middle East have undergone significant changes after the US-led Iraq War in 2003,which shattered the geo-political balance,the traditional religious patterns and military existence in this region.Of particular note is the“Eastward Movement”of the geo-political center of the Middle East.In other words,the six countries in the Persian Gulf area2 are playing a more powerful and more influential role as a regional entity.The influence expansion of the Gulf is driven by the radical changes of the international environment on the one hand and its efforts for stability and development on the other.The rise of the Gulf has an immediate impact on the future development of the Middle East/Arab area.Besides,it will also influence the political stability and economic development of the whole world.
