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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Dynamics of evaporation from saline water bodies
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Dynamics of evaporation from saline water bodies

机译：盐水水体蒸发的动力学

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摘要

The sensitivity of evaporation from saline solutions resulting from a variation in their salinity/activity coefficients (beta) is investigated The calculations are based on a theoretically derived parameter (gamma = partial derivativeT/partial derivative beta), which accounts for the temperature change following a departure in the salinity/activity coefficient. Results reveal that gamma is a function of saline temperature. the level of the activity coefficient, and the transfer coefficients for water vapor and sensible heat. For a transfer coefficient of 15 W m (-2) kPa(-1). gamma ranges from approximate to -6 K for a saline temperature of 5 degreesC and activity coefficient of 0.95 to approximate to -27 K for a saline temperature of 40 degreesC and activity coefficient of 0.4, The present formulation provides a robust method that can be used to identify lower and upper theoretical limits for the variations of saline temperatures, and also to derive the departures of the activity coefficient and evaporation rates for saline solutions from routine meteorological observations only. Calculations with the Penman equation reveal that the aerodynamic term is the most sensitive parameter influencing evaporation from saline solutions following a departure in their salinity/activity coefficients. with a contribution ranging from approximate to 50%-65% of total annual evaporation departure. Alterations to net radiation following a variation in beta accounts for a contribution of about 25% of total annual change in evaporation. [References: 33]
机译：研究了盐度/活度系数（β）的变化导致盐溶液蒸发的敏感性。计算基于理论推导的参数（γ=偏导数T /偏导数β），该参数解释了温度变化后的温度变化。盐度/活度系数的偏离。结果表明，γ是盐水温度的函数。活度系数的水平，以及水蒸气和显热的传递系数。对于15 W m（-2）的传输系数kPa（-1）。 γ的范围从5摄氏度的盐水温度和-6的活度系数到-6 K，到40摄氏度的海水温度和活度系数的0.4到约-27K。本发明提供了一种可靠的方法，可用于确定盐水温度变化的理论上限和下限，并且仅从常规气象观测中得出盐溶液的活度系数和蒸发速率的偏差。用Penman方程进行的计算表明，空气动力学项是影响盐溶液/盐度/活度系数变化后影响盐溶液蒸发的最敏感参数。其贡献约占年度蒸发总量的50％-65％。 β值变化后净辐射的变化约占蒸发总量每年变化的25％。 [参考：33]

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