水汽压

一种新的计算冰面饱和水汽压方法

A New Method for Calculating the Saturated Water Vapor Pressure over Ice

水汽压常规茶园昼间高于古茶园，而夜晚低于古茶园；

Water vapor pressure in conventional tea plantation was higher than that in ancient tea plantation in the daytime and lower than that in ancient tea plantation at night ;

GIS支持的起伏地形下重庆市水汽压的空间分布

Spatially Distribution of Water Vapor Press under Rugged Terrain on GIS in Chongqing

山区水汽压随着海拔高度的增加呈e指数减小；

The mountain water vapor press decreases as a e index with the increasing of sea level elevation ;

本文提出一个利用海面大气水汽压eD近似计算W的线性方程，同时还给出一个由W值计算τ（？）的方程；

A linear equation for approximate calculation of W from the atmosphere moisture pressure above sea surface ( e_D ) and a calculative equation for τ _a from W are presented .

北京山区落叶阔叶林优势种的水分利用效率（WUE）与其所在地的气候条件有很密切的关系，特别是大气相对湿度、太阳辐射强度、饱和水汽压亏缺（VPD）和温度。

The long term water use efficiency ( WUE ), of key species in deciduous broad-leaved forest in Beijing Mountain area , is strongly related to relative humidity , solar radiation , vapor pressure deficit and temperature .

据此建立了充分供水条件下冠气温差与饱和水汽压差的关系方程，作为基线方程，计算不同灌水处理的冬小麦旺盛生长期间水分胁迫指数（CWSI）。

A baseline equation of Tc - Ta with VPD was established to calculate the Tc - Ta under non-water-stressed condition for the purpose of calculation of crop water stress index ( CWSI ) .

饱和水汽压计算公式的比较研究

The Compare and Research of The Calculate Formula of The Saturation Water Steam Pressure

凉爽条件下体感温度模型的建立及风速、水汽压、辐射的影响

The apparent temperature model under cool condition and effects of wind , vapor-pressure and extra radiation

相对湿度和饱和水汽压的变化幅度大，并有明显的局部差异性。

Variations of relative humidity and saturated vapor pressure have great fluctuation and obvious local difference .

透湿气性能随着膜两侧的水汽压差增加而增加。

The water vapor permeability increases with the difference of humid vapor partial pressure between the SMP films surfaces .

空气相对湿度、叶片与大气间水汽压差是诱发气孔限制的重要因素。

Factors causing stomatal limitation were mainly the air relative humidity and the vapor pressure difference between leaf and air .

地理位置和海拔高度是水汽压空间分布的主要影响因子。

Geographical situation and sea level elevation are the main influencing factors to the spatial distribution of water vapor press .

南北坡气温、水汽压、相对湿度在昼间有一定差异；

There are differences of air temperature , water vapor pressure and relative humidity between S-facing and the N-facing slope in the daytime .

影响树干液流密度日变化的主导因子为光合有效辐射和水汽压亏缺，二者对主导因子敏感度相当。

Effective photosynthetic radiation and deficient vapor pressure were the dominant environmental variables affecting the diurnal variation of sap flow density on sunny days .

网室内外小气候要素（相对湿度、温度和饱和水汽压差）的差异随着风速的增加而减小；

The differences in relative humidity , temperature and vapor pressure deficit between inside and outside the screen-house decreased with the wind velocity increasing .

干季树干液流与水汽压亏缺之间的时滞效应与夜间水分补充量显著相关，湿季则相反。

The time lag between Js and VPD was significantly related to nighttime water recharge in dry season , but reversed in wet season .

碳同化速率与光合有效辐射、水汽压亏缺和气温均呈多项式相关，相关性显著。

Carbon assimilation rate have a polynomial related with photosynthetic effective radiation , deficient vapor pressure and temperature . It proves the relativity is obvious .

干热季林冠上湿度变化范围为26.5%~97.2%，饱和水汽压差数值大小介于0.3~30.5hPa之间；

In the dry hot season , relative humidity and water vapour deficit varied from 26.5 to 97.2 % and from 0.3 to 30.5 hPa , respectively ;

若云中所有凝结水分都是过冷却水，云中水汽压对水面饱和，云中相对湿度为100%；

When the droplets are all supercooled water , the vapor of air is saturated with respect to water , and the relative humidity is 100 % ;

结果表明，布里渊散射光频移受大气压、水汽压的影响很小，而受大气温度的影响很大。

The result shows that the frequency shift of Brillouin scattering light is scarcely influenced by air pressure and vapor pressure , and greatly affected by air temperature .

叶片蒸腾速率与细胞内外水汽压差存在着相关关系，与气孔阻力呈显著负相关。

For example , there was a close correlation between transpiration rate and difference of vapor pressure , and a close negative correlation between it and stoma resistance .

水汽压与郁闭度也呈多项式二次幂关系，郁闭度0.5～0.6的水汽压最低。

Water-vapour pressure also has a polynomial second power equation with canopy density and the lowest pressure value is obtained in the forest of 0.5 ~ 0.65 canopy density .

重庆市全年各月月平均和年平均水汽压都表现出：随着海拔高度的增加，水汽压逐渐减小；

The month average and the year average water vapor press in ChongQing both show that : the water vapor press decreases with the increasing of sea level elevation ;

水稻气孔阻力与相对湿度、土壤含水量、叶气温差和光强呈现负相关，与饱和水汽压差、温度呈现正相关。

The stomatal resistance is negatively correlated with relative humidity , soil moisture , leaf-air temperature difference and light intensity and positively correlated to vapor pressure deficit and temperature .

蒸腾速率受到许多田间小气候因子的影响，相关分析及多元逐步回归分析表明净辐射与空气饱和水汽压差是影响茶园蒸腾作用的2个主要气象因子。

Correlation analysis and multi-factor successive regressional analysis revealed that net radiation and water vapor saturated deficit were the two major meteorological factors affecting transpiration of the tea plants .

空气温度、叶面温度、饱和水汽压差和气孔导度是影响水稻的蒸腾速率的关键因素，并在水稻不同生育阶段表现不同的影响程度；

Air temperature , leaf temperature , vapor pressure deficit and stoma conductance were the key factors affecting transpiration , and the effects would be different in different growing stages .

根据年和季节霜冻日数和其它气候因子关系的分析，水汽压对霜口具有重要和一致的影响。

Analysis based on the annual and seasonal number of frost days relationship with other climate variables , water vapor pressure show high and consistent relationship with the number of frost days .

根据实际水汽压的日均值和气温常规资料可准确模拟相对湿度的日变化.如果区域参数已知或被正确估计，上述方法可得到较为理想的气象要素日变化的模拟结果。

Relative humidity is calculated from the dew point temperature and actual air temperature For getting better simulated meteorological data of diurnal patterns , the site-specific parameters should be fixed or estimated accurately .

冷云中，当云中所有凝结水分都是固态时，水汽压对冰面饱和，相对湿度是温度的函数；

In the cold cloud , when the droplets are all solid water , the vapor of air is saturated with respect to ice , and the relative humidity is a function of temperature ;