塔里木河流域绿洲边缘土壤蒸发与积盐的初步分析   总被引：8，自引：1，他引：7  

李国振 《干旱区地理》1998,21(1):29-33

本文通过对塔里木河流域土壤分的分析测定,视频研究了盐分积累的特点及其与蒸发的关系;盐分含量高,累积速度快、表聚性强。  相似文献   

四川盆地三叠系蒸发岩的变质作用与富钾卤水的成因   总被引：5，自引：0，他引：5  

李亚文  蔡克勤 《现代地质》1998,12(2):222-228

在四川盆地三叠系蒸发岩建造中已发现钾盐镁矾、无水钾镁矾、软钾镁矾、杂卤石、钾石膏、多钙钾石膏、钙芒硝等矿物,并在多处发现富钾卤水。已有的资料表明,这些矿物组合是已沉积的固体钾盐层在成岩期水溶变质作用过程中形成的变质矿物组合。在此过程中大量的钾质转入水溶液,形成了富钾卤水。这种富钾卤水是可综合利用的ＫＣｌ、ＮａＣｌ和Ｌｉ、Ｓｒ、Ｃｓ、Ｒｂ、Ｂ、Ｂｒ、Ｉ的优质盐化工业原料卤水。  相似文献   

E-601B蒸发观测业务及蒸发量的分析判断   总被引：1，自引：1，他引：0  

李崇志 《气象》1998,24(2):54-55

Ｅ－６０１Ｂ蒸发观测业务及蒸发量的分析判断李崇志（江苏省气象局业务处,南京２１０００８）根据中国气象局的决定和安排,１９９６年Ｅ－６０１Ｂ蒸发器在全国国家基本（基准）站推广换型并正式投入业务使用,有部分台站还是首次接触该项业务。本文总结实施该项业务的...  相似文献   

我国两种蒸发现测资料的对比分析   总被引：1，自引：1，他引：0       下载免费PDF全文

刘小宁 《应用气象学报》1998,9(3):321-328

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一种以能量平衡为基础的干旱指数   总被引：5，自引：0，他引：5  

唐登银 《地理研究》1987,6(2):21-31

本文以能量平衡公式为基础,根据实际蒸发与潜在蒸发的关系依赖于土壤水分含量的事实,导出一种表达干湿状况的指标——土壤水分干旱指数。  相似文献   

Sensitivity of penman-monteith reference crop evapotranspiration in Tao’er River Basin of northeastern China   总被引：1，自引：0，他引：1  

Liqiao Liang  Lijuan Li  Li Zhang  Jiuyi Li  Bin Li 《中国地理科学(英文版)》2008,18(4):340-347

A non-dimensional relative sensitivity coefficient was employed to predict the responses of reference crop evapotranspiration （ET0） to perturbation of four climate variables in Tao＇er River Basin of the northeastern China. Mean monthly ET0 and yearly ET0 from 1961 to 2005 were estimated with the FAO-56 Penman-Monteith Equation. A 45-year historical dataset of average monthly maximum/minimum air temperature, mean air temperature, wind speed, sunshine hours and relative humidity from 15 meteorological stations was used in the analysis. Results show that： 1） Sensitivity coefficients of wind speed, air temperature and sunshine hours were positive except for those of air temperature of Arxan Meteorological Station, while those of relative humidity were all negative. Relative humidity was the most sensitive variable in general for the Tao＇er River Basin, followed by sunshine hours, wind speed and air temperature. 2） Similar to climate variable, monthly sensitivity coefficients exhibit large annual fluctuations. 3） Sensitivity coefficients for four climate variables all showed significant trends in seasonal/yearly series. Also, sensitivity coefficients of air temperature, sunshine hours and wind speed all showed significant trends in spring. 4） Among all sensitivity coefficients, the average yearly sensitivity coefficient of relative humidity was highest throughout the basin and showed largest spatial variability. Longitudinal distribution of sensitivity coefficients for air temperature, relative humidity and sunshine hours was also found, which was similar to the distribution of the three climate variables.  相似文献   

海气通量算法在海上蒸发波导诊断中的应用   总被引：1，自引：0，他引：1  

李云波  张永刚  唐海川  王华  焦林 《海洋技术学报》2008,27(1):106-110

利用TOGA COARE Bulk Air-Sea Flux Algorithm3.0,建立了基于通量算法的蒸发波导模型(Flux Evaporation duct Model),并进行了环境敏感性分析,而且与Paulus-Jeske模型对比,进行误差敏感性分析,并开展了雷达探测评估的海上试验,较全面的阐述了基于通量算法的蒸发波导模型的性能。  相似文献   

Comparisons of several evaporation/precipitation datasets for the Bohai Sea based on salinity simulation     

Xinyan Mao  Wensheng Jiang 《中国海洋大学学报(英文版)》2009,8(3):209-214

Evaporation (E) rate and precipitation (P) rate are two significant meteorological elements required in the ocean baroclinic modeling as external forcings. However, there are some uncertainties in the currently used E/P rates datasets, especially in terms of the data quality. In this study, we collected E/P rates data from ERA-40, NCEP/NCAR Reanalysis, HOAPS for the Bohai Sea and nine routine stations around Laizhou Bay, and made comparisons among them. It was found that the differences in E/P rates between land and sea are remarkable, which was due to the difference in underlying surfaces. Therefore, the traditional way of using E/P rates acquired on land directly at sea is not correct. Since no final conclusion has been reached concerning the net water transport between the Bohai Sea and the Yellow Sea, it is unfeasible to judge the adequacy of the four kinds of data by using the water budget equation. However, the E/P rates at ERA-40 sea points were considered to be the optimal in terms of temporal/spatial coverage and resolution for the hindcast of salinity variation in the Bohai Sea. Besides, using the 3-D hydrodynamic model HAMSOM (HAMburg Shelf Ocean Model), we performed numerical experiments with different E/P datasets and found that the E/P rates at sea points from ERA-40 dataset are better than those from NCEP/NCAR Reanalysis dataset. If NCEP/NCAR Reanalysis E/P rates are to be used, they need to be adjusted and tested prior to simulation so that more close-to-reality salinity values can be reproduced.  相似文献   

“Trends” and variations of global oceanic evaporation data sets from remote sensing   总被引：1，自引：0，他引：1  

CHIU Long S  CHOKNGAMWONG R  XING Yukun  YANG Ruixin  SHIE Chung-Lin 《海洋学报(英文版)》2008,27(3):124-135

The variability in global oceanic evaporation data sets was examined for the period 1988-2000. These data sets are satellite estimates based on bulk aerodynamic formulations and include the NASA/Goddard Space Flight Center Satellite-based Surface Turbulent Flux version 2 （ GSSTF2）, the Japanese-ocean flux using remote sensing observations （J-OFURO）, and the Hamburg Ocean-Atmosphere Parameters and Fluxes from Satellite version 2 （HOAPS2）. The National Center for Environmental Prediction （NCEP） reanalysis is also included for comparison. An increase in global average surface latent heat flux （SLHF） can be observed in all the data sets. Empirical mode decomposition （EMD） shows long-term increases that started around 1990 for all remote sensing data sets. The effect of Mt. Pinatubo eruption in 1991 is clearly evident in HOAPS2 but is independent of the longterm increase. Linear regression analyses show increases of 9.4%, 13.0%, 7. 3%, and 3.9% for GSSTF2, J-OFURO, HOAPS2 and NCEP, for the periods of the data sets. Empirical orthogonal function （EOF） analyses show that the pattern of the first EOF of all data sets is consistent with a decadal variation associated with the enhancement of the tropical Hadley circulation, which is supported by other satellite observations. The second EOF of all four data sets is an ENSO mode, and the correlations between their time series and an SO1 are 0.74, 0.71,0.59, and 0.61 for GSSTF2, J-OFURO, HOAPS2, and NCEP in that order. When the Hadley modes are removed from the remote sensing data, the residue global increases are reduced to 2.2% , 7. 3%, and 〈 1% for GSSTF2, J-OFURO and HOAPS, respectively. If the ENSO mode is used as a calibration standard for the data sets, the Hadley mode is at least comparable to, if not larger than, the ENSO mode during our study period.  相似文献   

大柴旦盐湖产钾后母液中硼的提取试验     

马得仁  曹海英  陈洪 《青海国土经略》2006,(2):44-47

对青海省大柴旦盐湖中晶间卤水提钾后老卤中硼、锂的提取进行了探索性试验,特别是在老卤中添加芒硝以富集硼的试验,具有开拓意义。  相似文献