The characteristics of seasonal precipitation over the Tibetan Plateau （TP） were investigated using TRMM （Tropical Rain- fall Measuring Mission） precipitation data （3B43）. Sensitive regions of summer precipitati...The characteristics of seasonal precipitation over the Tibetan Plateau （TP） were investigated using TRMM （Tropical Rain- fall Measuring Mission） precipitation data （3B43）. Sensitive regions of summer precipitation interannual variation anomalies were investigated using EOF （empirical orthogonal function） analysis. Furthermore, the profiles of cloud water content （CWC） and precipitable water in different regions and seasons were analyzed using TRMM-3A12 data observed by the TRMM Microwave Imager. Good agreement was found between hydrometeors and precipitation over the eastern and southeastern TP, where water vapor is adequate, while the water vapor amount is not significant over the western and northern TE Further analysis showed meridional and zonal anomalies of CWC centers in the ascending branch of the Hadley and Walker Circulation, especially over the south and east of the TE The interannual variation of hydrometeors over the past decade showed a decrease over the southeastern and northwestern TP, along with a corresponding increase over other regions.展开更多
By liquid precipitation, lanthanide element orthophosphate was prepared and heat-treated at a series of temperatures. By FT-IR and XRD, it is found that bands near 1000 and 540 cm-1 split above 800 ℃ for the rare ear...By liquid precipitation, lanthanide element orthophosphate was prepared and heat-treated at a series of temperatures. By FT-IR and XRD, it is found that bands near 1000 and 540 cm-1 split above 800 ℃ for the rare earth before Tb, since the system turned from hexagonal phase to monoclinic phase. For those after Tb, obvious tetragonal phase could be found above 800 ℃. In infrared spectra, with the increasing atomic number, bands turned to be blue shift. So rare earth orthophosphates′ absorption bands could be controlled by changing their heat-treating temperature or the proportion of different rare earth ions.展开更多
基金supported by the National Key Basic Research Program of China(2013CBA01808)National Natural Science Foundation of China(Grant Nos.91437217,41275061,and 41440035)
文摘The characteristics of seasonal precipitation over the Tibetan Plateau （TP） were investigated using TRMM （Tropical Rain- fall Measuring Mission） precipitation data （3B43）. Sensitive regions of summer precipitation interannual variation anomalies were investigated using EOF （empirical orthogonal function） analysis. Furthermore, the profiles of cloud water content （CWC） and precipitable water in different regions and seasons were analyzed using TRMM-3A12 data observed by the TRMM Microwave Imager. Good agreement was found between hydrometeors and precipitation over the eastern and southeastern TP, where water vapor is adequate, while the water vapor amount is not significant over the western and northern TE Further analysis showed meridional and zonal anomalies of CWC centers in the ascending branch of the Hadley and Walker Circulation, especially over the south and east of the TE The interannual variation of hydrometeors over the past decade showed a decrease over the southeastern and northwestern TP, along with a corresponding increase over other regions.
基金Trans-Century Training Programme Foundation for the Talents by the Ministry of EducationNatural Science Fund of Jiangsu Province (BK2004121)
文摘By liquid precipitation, lanthanide element orthophosphate was prepared and heat-treated at a series of temperatures. By FT-IR and XRD, it is found that bands near 1000 and 540 cm-1 split above 800 ℃ for the rare earth before Tb, since the system turned from hexagonal phase to monoclinic phase. For those after Tb, obvious tetragonal phase could be found above 800 ℃. In infrared spectra, with the increasing atomic number, bands turned to be blue shift. So rare earth orthophosphates′ absorption bands could be controlled by changing their heat-treating temperature or the proportion of different rare earth ions.
