Temperature dependences of mechanisms responsible for the water-vapor continuum absorption. I. Far wings of allowed lines

摘要: It is well known that the water-vapor continuum plays an important role in radiative balance Earth’s atmosphere. This was first discovered by Elsasser almost 70years ago, and since time there has been a large body of work, both experimental theoretical, on this topic. experimentally shown for ambient atmospheric conditions, absorption scales quadratically with H2O number density strong, negative temperature dependence (T dependence). Over years, have three different theoretical mechanisms postulated: Far wings allowed transitions, water dimers, collision-induced absorption. Despite improvements data, at present no consensus which mechanism primarily responsible The proposed accumulation far-wing strong transitions. Later, dimers provides qualitative explana...