摘要
湿空气中,因水汽的存在,使空气中的氮气、氧气等气体的密度发生变化。文中给出诸气体密度减小率的表达式为e/p;所产生的“降压效应”为△p=-ap;产生的“升温效应”为△T=a/1-a用本站气压p和水汽压e可计算出空气中氧密度的变化,进而间接得出水中氧含量的增减值。这对防止鱼的浮头乃至窒息死亡有一定的积极作用。
The density of nitrogen and oxygen in atmosphere changes because of the existing moisture.In this paper,the decreasing of various air density Will be expressed as the following equation:a_i=e/p;the pressure decreasing eff- ect caused can be expressed as △P=-ap;and the temperature in creasing effect can be expressed as △T=T(a/1-a);using the atmospheric pressure P observed in the station,and water vapour pressure e can calculate the chan- ges of oxygen density,the results can be indirectly used for getting oxygen content changes in water.The values got in this way could be used as an index for taking measures to prevent fish from floating its head caused by the deficiency of oxygen supply and suffocation.
出处
《中国农业气象》
CSCD
北大核心
1991年第1期5-9,共5页
Chinese Journal of Agrometeorology
