‘To heat a planetary surface’ for dummies; Part 2

For something – anything – to acquire a temperature above absolute zero (0 K), it somehow needs to be able to warm. The only real requirement for something to be able to warm is for it to possess a ‘thermal mass’, or simply ‘mass’. A thermal mass provides the thing in question with what is (a bit awkwardly) called a ‘heat capacity’, meaning a capacity to absorb and store energy from some energy source (external or internal).

We already know, from basic thermodynamic principles, how energy can be transferred to (or from) an object. It can be transferred in the form of ‘heat’ [Q] or in the form of ‘work’ [W]. Whenever energy is transferred to an object, the ‘internal energy’ [U] of that object increases as a result, which simply means that the object in question has absorbed (energy isn’t ‘transferred’ to a system until it’s actually become ‘absorbed’ by it) the energy to store it inside its mass, as microscopic kinetic and potential energy of its atoms and molecules.

We already know, from the first post in this series, how system ‘internal energy’ [U] relates to system ‘temperature’ [T]. We know that a system with a high ‘heat capacity’ will warm more slowly than a system with a low ‘heat capacity’, both systems absorbing equal energy inputs, the high-heat-capacity system simply storing a larger portion of the absorbed energy as internal/molecular PE rather than as internal/molecular KE (determining the temperature). Both systems, however, will warm, only at different rates. U and T invariably move in the same direction. Unless there is an ongoing phase transition. Then U will increase and T will not. There is no process, though, where U increases and T decreases. The two correspond.

OK. We know that to make an object warm, we must make it accumulate ‘internal energy’. If it doesn’t, it cannot warm. Continue reading

‘To heat a planetary surface’ for dummies; Part 1

Happy New Year to everyone! Hope you all had a pleasant celebration.

I will unabashedly start off in 2015 with … another attempt at exposing the chasm that lies between what real physics tells us about the processes of nature (plus what we actually observe in the real world) on the one hand, and what the ‘physics’-like concoctions of the radiative GHE/AGW-establishment proclaim on the other.

The general public understanding (or should we rather call it ‘perception’?) of how the presence of an atmosphere would make the solar-heated planetary surface underneath warmer than if the atmosphere weren’t there, is so riddled with misconceptions and flawed ideas about how the world works, on such a fundamental level, that something needs to be done.

People simply need to understand that the official (and, I’m afraid, ‘authoritative’) rGHE/AGW ‘explanation’ is based altogether on self-invented nonsense physics.

The best way to let people realise this is to explain how things really work and to have this juxtaposed with the standard rGHE postulates advertised by ‘Climate ScienceTM’. Continue reading

I don’t get ‘the gravito-thermal effect’

Lately there’s been a bit of back-and-forth discussion going on on the so-called ‘Gravito-Thermal Effect’ (GTE) at a few notable climate blogs, like The Hockey Schtick, Tallbloke’s Talkshop, Clive Best and even Judith Curry’s Climate Etc. (in fact, this is where the lengthiest discussion thread on the subject is to be found).

To me the whole thing appears to arise from a fundamental misunderstanding of the adiabatic process (see the end of the post).

Something called the ‘Loschmidt Effect’, after a proposal in the 1870s by the Austrian scientist Josef Loschmidt, seems to lie at the heart of the GTE argument. Tallbloke brought it out from relative obscurity in a post in early 2012. A quote from a textbook describes the proposed effect as follows: Continue reading