饱和混合比没有多少水汽的空气……但多少* *会,根据温度。因为* *绝热上升/下降* *意味着冷却或加热,* *饱和混合比例会改变* *。实际的混合比另一方面不会改变,除非你的包裹,它冷却到露点及以后,开始凝结。当你使用skew-T或这样,任何时候你看到“饱和”这个词,温度信号参考* * * *的部分概要(正确/红线)和* *不露点的* *部分(左/绿线)。当你看到这个词饱和,这是一个不同的实体。(除非T = T_d美元)*饱和*混合比是不同的混合比例,* *饱和蒸汽压力和蒸汽压不同,等等,每个都与温度/什么可以在这一点上存在的可能性,而不是露点/当前现有的水分。斜T,饱和混合比是一样的形状,向右,沿着/并行混合比的例子行通常(冲亮绿色在这张照片)。但他们不是相同的(除非T = T_d美元)行:[![在这里输入图像描述][1]][1]饱和混合比线从温度,常规的混合比源自露点。 > I think the mixing ratio (rv=ρv/ρd) is constant as long as no water > vapor is condensed out, but saturation mixing ratio always confuses me > a little. Indeed the (regular) mixing ratio is constant as long as there's no condensation and no outside change to the parcel... for the moisture you stay with the same mixing ratio in ascent (until saturation), such as when calculating the LCL. But you [follow the dry adiabat][2] (lines going up to the left on a skewt like this one) for the temperature for condensation-less ascent (so never use the saturation mixing ratio line, the one coming from just the temperature). [1]: https://i.stack.imgur.com/iDR8X.png [2]: https://en.wikipedia.org/wiki/Lifted_condensation_level