PHYSICAL MECHANISM OF INFLUENCE OF HEAT SOURCE ANOMALY OVER LOW LATITUDES ON GENERAL CIRCULATION OVER NORTHERN HEMISPHERE IN WINTER

In this paper, the propagating laws of quasi-stationary planetary waves forced in low latitudes in a realistic current are discussed by using the refractive index squared of waves in a spherical coordinate system during the Nothern Hemisphere winter. It is pointed out that anomaly of heat source over low latitudes can cause the general circulation anomalies over high and middle latitudes during the Northern Hemisphere winter.In this paper, a quasi-geostrophic, 34-level spherical coordinto model with Rayleigh fraction, Newtouian cooling and horizontal eddy thermal diffusivity is used to investigato the propagations of the-anomaly of disturbance pattern due to an idealized heat source anomaly during the Northern Hemisphere winter. The computed results show that because of the heat source anomaly over the tropical Pacific, the PNA (the Pacific/North America) pattern anomalies in the winter circulation over the Northern Hemisphere will be caused.     

A DIAGNOSTIC STUDY OF FORMATION AND MAINTENANCE OF BLOCKING SITUATION ON THE NORTHERN HEMISPHERE USING E-P FLUX

In this paper, the variations of the mean flow, the E-P flux and its divergence of planetary waves in the process of the formation, maintenance and collapse of the blocking situation in the second half of February, 1979 are analysed with the transformed Eulerian mean-motion equations.Analysed results show that because the basic flow changes from the easterly into the westerly in the lower troposphere at high latitudes, the planetary wave for wavenumber 2 strongly propagates upwards, and because of the interaction between the upward propagating planetary wave and the basic flow, the westerty is weakened and approaches to the resonant flow of wavenumber 2 in the middle and upper troposphere (then, in the lower and middle Stratosphere). This may cause the anomalous amplification of planetary wave for wavenumber 2, and moreover make the mean flow change from the westerly into the easterly in the lower and middle stratosphere, following the upper troposphere. Therefore, the blocking situation can be formed a     

浊点萃取-火焰原子吸收光谱法测定矿渣中痕量金

研究了以双硫腙为络合剂,以非离子型表面活性剂Triton X-100为萃取剂的浊点萃取-火焰原子吸收光谱法(CPE-FAAS)测定痕量金(Ⅲ)的新方法。详细考察了溶液的pH值、络合剂和表面活性剂浓度、平衡温度和时间等条件对浊点萃取效果的影响。该方法的线性范围为0.05~0.8μg/mL,检出限为7.9 ng/mL,相对标准偏差为4.12%(n=11),回收率在98.0%~102.0%之间,用于矿渣中金的测定,结果满意。     

DYNAMIC INSTABILITY OF LARGE-SCALE SEA SURFACE TEMPERATURE (SST) DISTURBANCE AND THE FORMATION OF SEA SURFACE TEMPERATURE ANOMALY (SSTA)

This paper proposes that the formation of SSTA is a dynamic instability of large-scaleSST disturbance. Using a linear coupled air-sea model, in which the baroclinic atmosphere isdivided into two levels and the ocean is a mixture layer and a deep water layer, we obtainphysical conditions as well as spatial and temporal seales for the growing of SST disturbance.The major factors for the growing of SST disturbance include Sverdrup transportation, heatexchange between mixture layer and deep water, and modulation effect of clouds on solarradiations. The main horizontal scales of growing SST disturbance range from 3000 to 6000km and its temporal scales are several months. even soveral years. On the basis of thesetheoretical results, the causes for the formation of SSTA are also discussed.     

萃淋树脂微色谱柱分离富集-苯基荧光酮光度法测定中草药中痕量锗和钼

研究了在微色谱柱中以CL-TBP萃淋树脂为固定相,运用零空床体积洗脱技术,反相萃取分离痕量Ge、Mo。洗脱体积仅1.0~1.2 mL便可实现两元素的连续分离。洗脱液用苯基荧光酮-溴化十六烷基三甲基溴化铵(PF-CTMAB)光度法进行测定。该树脂对Ge、Mo的动态吸附容量分别为34.8 mg/g和67.4 mg/g,加标回收率分别为91.4%~98.6%和96.6%~101.3%,相对标准偏差(RSD)分别在2.53%~5.74%和1.91%~4.12%之间。方法用于中草药中痕量Ge、Mo的测定,结果满意。     

有机-无机介孔材料对痕量汞的吸附性能的研究

研究了一种有机-无机介孔材料在分离富集和测定痕量汞中的应用,探讨了溶液pH、温度、洗脱条件及干扰离子对汞分离富集的影响,结果发现该材料对Hg的吸附具有较高的选择性和较大的吸附容量。在pH 3.2、温度为20±1℃条件下,汞可被该材料定量吸附。其静态饱和吸附容量为119.15 mg/g。吸附的汞可用浓HCl洗脱,用原子荧光法测定洗脱下来的汞。该方法测定汞的检出限达1.89×10-9g/L(3σ),相对标准偏差为2.7%(n=11,ρ=0.5 ng/mL),线性范围为0.005~5 ng/mL,加标回收率95.3%~104.5%。此法已应用于环境水样中痕量汞的测定。     

ON OTHER WAVE GUIDE IN STATIONARY PLANETARY WAVE PROPAGATIONS IN WINTER NORTHERN HEMISPHERE

In this paper, the refractive index squared of stationary planetary waves in the isothermalatmosphere is computed theoretically. It has been discovered that there should be the otherwave guide pointing from the lower troposphere in middle and high latitudes toward the uppertroposphere in low latitudes in addition to the polar wave guide in the vertical and lateral pro-pagations of stationary planetary waves in winter. The vertical and lateral propagations of stationary planetary waves responding to an idealiz-ed forcing mechanism, for example, an idealized topography or stationary heat sources overthe Northern Hemisphere have been investigated by means of a quasigeostrophic, steady-state,34-level model with Rayleigh friction, Newtonian cooling effect and the horizontal kinematicthermal diffusivity included in a spherical coordinate system. The computed results have veri-fied that there actually is the other wave guide in the stationary planetary wave propagationsin winter. The vertical distributions of     

固载硫杂杯芳烃树脂分离富集-火焰原子吸收法测定痕量银

报道了色谱301固载硫杂杯芳烃树脂分离预富集-火焰原子吸收光谱法测定痕量银的新方法。探讨了固载硫杂杯芳烃树脂对银的吸附原理与最佳条件。将含Ag 试液在pH=10、温度为23±2℃的条件下恒温震荡10min,静置10min,Ag 可被树脂定量富集被吸附的Ag 可用5mL酸性硫脲(0.15mol/LHCl 0.15mol/L硫脲)完全洗脱,洗脱液中的银用火焰原子吸收光谱法测定。该法对银的检出限为0.17μg/L(3σ,n=11);线性范围为0.006~3mg/L。对0.18mg/L的Ag 标液进行7次测定,RSD=1.53%,回收率在99.9%~105.0%之间。用于“二次资源”锌矿渣和环境水样中痕量银的测定,结果满意。     

固载硫杂杯芳烃树脂分离富集-火焰原子吸收法测定痕置银

报道了色谱301固载硫杂杯芳烃树脂分离预富集-火焰原子吸收光谱法测定痕量银的新方法。探讨了固载硫杂杯芳烃树脂对银的吸附原理与最佳条件。将含Ag^＋试液在pH=10、温度为23±2℃的条件下恒温震荡10min，静置10min，Ag^＋可被树脂定量富集被吸附的Ag^＋可用5mL酸性硫脲（0．15mol／L HCl＋0．15mol／L硫脲）完全洗脱，洗脱液中的银用火焰原子吸收光谱法测定。该法对银的检出限为0．17μg／L（3σ，n=11）；线性范围为0．006—3mg／L。对0．18mg／L的Ag^＋标液进行7次测定，RSD=1．53％。回收率在99．9％-105．0％之间。用于“二次资源”锌矿渣和环境水样中痕量银的测定，结果满意。     

冬季低纬度热源异常对北半球大气环流影响的物理机制

本文应用球坐标系的波折射指数平方来讨论北半球的冬季低纬度强迫所产生的准定常行星波在实际基本气流中的传播规律,指出了冬季北半球低纬度热源异常将会引起北半球中高纬度大气环流的异常。本文还应用一个包括Rayleigh摩擦、Newton冷却及水平涡旋热力扩散准地转球坐标模式,来研究北半球冬季理想热源强迫所产生的扰动系统在北半球的传播情况。计算结果表明:在冬季由于热带太平洋上空热源异常,可以产生PNA型大气环流的异常。