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water vapor fluxes
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  水汽通量
     The results show that before the Plateau uplifting or when it is uplifted to the critical height, the net entering water vapor fluxes of the NW China area from the east, west, south and north boundaries are more than now.
     结果表明,青藏高原隆升前和隆升至临界高度时,干旱区边界内获得的净水汽通量均明显比现在偏多;
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     The main characteristics of the vertically integrated fields of mean zonal and mean meridional eddy fluxes are analyzed and corresponding contributions for the total water vapor fluxes are discussed
     分析了垂直积分涡旋通量场和它的纬、经向分量场的主要特征,以及纬、经向涡旋通量在水汽总输送中的贡献。
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     Water
     水
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     Water Vapor Permeation Testing
     透湿性测试及发展
     and water;
     水分:31。
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     Phenomenon of coagulation of the water vapor.
     水汽凝结现象。
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     Solid Fluxes for Aluminium and Its Alloys
     铝及其合金用固态熔剂
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  water vapor fluxes
Since water vapor fluxes are dependent on these shears, they are also higher for the asymmetric case.
      
(1993) discuss the use of a Raman lidar for measurements of water vapor fluxes and suggest that the method is superior to the use of standard micrometeorological, point sensor measurements.
      
Coments on "derivation of water vapor fluxes from lidar measurements" by W.
      
Derivation of water vapor fluxes from Lidar measurements
      
Measured values of carbon dioxide and water vapor fluxes show diurnal variations characterized by crop activity with respect to assimilation, respiration and evapotranspiration.
      
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The daily data of wind and moisture from 1000 to 300 hpa during June and July of 1979 are used to compute the eddy transport of water vapor over the eastern China. The main characteristics of the vertically integrated fields of mean zonal and mean meridional eddy fluxes are analyzed and corresponding contributions for the total water vapor fluxes are discussed

本文计算了1979年6、7月份我国东部地区大气中的水汽涡旋输送。分析了垂直积分涡旋通量场和它的纬、经向分量场的主要特征,以及纬、经向涡旋通量在水汽总输送中的贡献。

A low cost, real time turbulence data acquisition system has been developed and successfully operated in the pilot experiment of HEIFE held in a Gobi desert station, August to September of 1988. A compatible set of computing programs has also been prepared and used in the processing of the data of over 150 runs, each lasted 30 to 45 mins. A preliminary analysis of the means, variances, and various turbulent fluxes calculated from the fluctuations of wind components, temperature and humidity, are presented. Most...

A low cost, real time turbulence data acquisition system has been developed and successfully operated in the pilot experiment of HEIFE held in a Gobi desert station, August to September of 1988. A compatible set of computing programs has also been prepared and used in the processing of the data of over 150 runs, each lasted 30 to 45 mins. A preliminary analysis of the means, variances, and various turbulent fluxes calculated from the fluctuations of wind components, temperature and humidity, are presented. Most results are fairly good when compared with other resourses. The water vapor fluxes were apparently negative in daytime and positive at night. This feature is worth more careful investigation. Spectra characteristics of various parameters in near neutral stability are analysed. The vertical velocity spectral peak was found near f=0.4, which is higher than others; Its shape is also wider than normal reported.

利用微机技术建立了一个较为廉价的近地层大气湍流数据实时采集处理系统,在1988年黑河预实验中工作良好,取得了一套较为完整的数据。对戈壁沙滩点的风、温、湿湍流脉动数据进行统计分析和涡旋相关方法处理,结果表明近地层大气的湍强特征符合一般规律。通量分析指出,戈壁地区的水汽通量在白天的绝大多数小时都呈负值(向下),而夜间为正。文中对湍流谱的特征也进行了初步分析。

Based on the radiosonde data in the agroforest area in Huang Huai Hai plain, a simplified one dimensional model was established to study the momentum, heat and water vapor fluxes above the agroforest ecosystems with three different structures. It was found that because of the frictional effect, the wind velocity above the vegetation canopy increased with height rapidly, which caused an insistent downward momentum flux above the canopy. During the stable clear night, the momentum flux was significant...

Based on the radiosonde data in the agroforest area in Huang Huai Hai plain, a simplified one dimensional model was established to study the momentum, heat and water vapor fluxes above the agroforest ecosystems with three different structures. It was found that because of the frictional effect, the wind velocity above the vegetation canopy increased with height rapidly, which caused an insistent downward momentum flux above the canopy. During the stable clear night, the momentum flux was significant because of the strong wind shear. It becames weak around noon,as the strong turbulence made the vertical wind shear smaller. Both heat and water vapor flux went downward in the night, which caused respectively by the radiation cooling of the vegetation canopy and by the water vapor condensation in the very low level. The heat flux turned upward after sunrise because of the surface heating, which reached to the maximum at noon when the surface super adiabat formed. The water vapor flux turned upward as well, due to the high vapor content in the lowest level caused by the evaportranspiration of the vegetation canopy at day. The author also discussed the flaw of one dimensional model and revealed some important aspects of atmosphere biosphere interaction.

根据近年在黄淮海平原大面积农林复合区的观测资料,采用简单的一维模型,讨论了此类复合系统与低层大气之间的热量、动量和水汽通量,比较了不同的结构林网形成的通量差异.结果表明,由于林冠层的摩擦作用,农林复合生态系统上空风速随高度增大较快,动量输送总是向下的.在层结稳定的夜间,其数值较大,而在湍流比较活跃的正午前后,由于垂直风切变减弱,动量输送也相应减小.夜间农林作物冠层的辐射冷却加强,近地层逆温梯度增大,加之作物冠层内部因辐射冷却而造成水汽凝结,冠层上部水汽大于冠层内部,此时热通量和水汽通量均向下.这一现象在白天日出后开始逆转,日出后,地面升温加快,并逐渐形成超绝热梯度,致使热量通量向上.此时农林作物蒸腾加剧,冠层高度范围内水汽含量增大,造成水汽向上输送.文中还讨论了一维模式的缺点,指出了进一步研究生态系统与大气相互作用的重要性

 
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