It bas been considered that large\|scale basic igneous activities are related to results of the break\|up of paleo\|continent. Basic magmatism could record the dynamics information for orogenic process. Thus, studying...It bas been considered that large\|scale basic igneous activities are related to results of the break\|up of paleo\|continent. Basic magmatism could record the dynamics information for orogenic process. Thus, studying it can help us to reconstruct the forming and evolution process of continental orogenic zone.The basic igneous zone in the central part of Qiangtang, Tibet, starts at the Sino\|Indian border in the west and ends at Shuanghu region in the east, being over 800km long and several to more than 100km wide. Based on published data, there are coeval basic magmatic activities with similar features in Sanjiang region, Western Yunnan and Thai\|Malaysian Peninsula. the basic dykes from Boyamalong to Qomu in central Qiangtang occur in swarms with E\|W trending and are more than one thousand in number. Single or composite igneous body is 1 to 7 km long and 0.3 to 3 km wide, being of the area of 0.3 to 20km\+2 . The total exposed area of the dykes is more than 400km\+2 . The country rocks of the intrusives are the upper Carboniferous Mushirbuka group, which consists of rift\|type deposits containing glaciomarine petromictic conglomerates.No basic dyke has been found in the strata since late Permian (Mokou Period)展开更多
The Ministry of Science and Technology (MOST) re-cently announced China’stop ten news events in ba-sic research in 2000. 1. Research into thenanomaterial scored re-markable
Taking into account moisture in virtue of general potential temperature,the author derive a three-dimensional(3D) pseudomomentum wave-activity relation for the moist atmosphere from the primitive equations in Cartesia...Taking into account moisture in virtue of general potential temperature,the author derive a three-dimensional(3D) pseudomomentum wave-activity relation for the moist atmosphere from the primitive equations in Cartesian coordinates using the Momentum-Casimir method.Since the wave-activity relation is constructed in an ageostrophic and non-hydrostatic dynamical framework,it may be applicable to diagnosing the evolution and propagation of mesoscale systems leading to heavy rainfall.The theoretical analysis shows that,besides the local change of wave-activity flux divergence and source or sink,the wave-activity relation includes two additional forcing terms.The first is the zonal gradient of difference between general potential temperature and potential temperature perturbations,and the second is the covariance of the solenoid and gradient of water vapor,denoting the direct influence of moisture on wave-activity density.The wave-activity density was applied to a heavy precipitation event occurring in the Jianghuai region of China.The calculation showed that the wave-activity density was consistent with 6-h accumulated precipitation observations,in terms of both spatial distribution and temporal tendency.This suggested that the disturbance represented by wave-activity density was closely related to the heavy precipitation.Although the wave-activity flux divergence and the covariance of the solenoid and gradient of water vapor made the primary contribution to the local change of wave-activity density,the covariance was more remarkable.The zonal gradient of difference between general potential temperature and potential temperature perturbations made a weaker contribution to the waveactivity density.展开更多
文摘It bas been considered that large\|scale basic igneous activities are related to results of the break\|up of paleo\|continent. Basic magmatism could record the dynamics information for orogenic process. Thus, studying it can help us to reconstruct the forming and evolution process of continental orogenic zone.The basic igneous zone in the central part of Qiangtang, Tibet, starts at the Sino\|Indian border in the west and ends at Shuanghu region in the east, being over 800km long and several to more than 100km wide. Based on published data, there are coeval basic magmatic activities with similar features in Sanjiang region, Western Yunnan and Thai\|Malaysian Peninsula. the basic dykes from Boyamalong to Qomu in central Qiangtang occur in swarms with E\|W trending and are more than one thousand in number. Single or composite igneous body is 1 to 7 km long and 0.3 to 3 km wide, being of the area of 0.3 to 20km\+2 . The total exposed area of the dykes is more than 400km\+2 . The country rocks of the intrusives are the upper Carboniferous Mushirbuka group, which consists of rift\|type deposits containing glaciomarine petromictic conglomerates.No basic dyke has been found in the strata since late Permian (Mokou Period)
文摘The Ministry of Science and Technology (MOST) re-cently announced China’stop ten news events in ba-sic research in 2000. 1. Research into thenanomaterial scored re-markable
基金supported by the National Basic Research Program of China (Grant No.2009CB421505)the Key Program of the Chinese Academy of Sciences (Grant No.KZZD-EW-05)+2 种基金the project of Chinese Academy of Meteorological Sciences (Grant No.2011LASW-B15)the Spectial Scientific Research Fund of Meteorological Public Welfare of the Ministry of Sciences and Technology (Grant No.GYHY200906004)and the National Natural Science Foundation of China (Grant Nos.41175060,41075098,and 41005005)
文摘Taking into account moisture in virtue of general potential temperature,the author derive a three-dimensional(3D) pseudomomentum wave-activity relation for the moist atmosphere from the primitive equations in Cartesian coordinates using the Momentum-Casimir method.Since the wave-activity relation is constructed in an ageostrophic and non-hydrostatic dynamical framework,it may be applicable to diagnosing the evolution and propagation of mesoscale systems leading to heavy rainfall.The theoretical analysis shows that,besides the local change of wave-activity flux divergence and source or sink,the wave-activity relation includes two additional forcing terms.The first is the zonal gradient of difference between general potential temperature and potential temperature perturbations,and the second is the covariance of the solenoid and gradient of water vapor,denoting the direct influence of moisture on wave-activity density.The wave-activity density was applied to a heavy precipitation event occurring in the Jianghuai region of China.The calculation showed that the wave-activity density was consistent with 6-h accumulated precipitation observations,in terms of both spatial distribution and temporal tendency.This suggested that the disturbance represented by wave-activity density was closely related to the heavy precipitation.Although the wave-activity flux divergence and the covariance of the solenoid and gradient of water vapor made the primary contribution to the local change of wave-activity density,the covariance was more remarkable.The zonal gradient of difference between general potential temperature and potential temperature perturbations made a weaker contribution to the waveactivity density.
