( There ( ( ( was not ) ( much ( moisture ( in ( the ( air mass ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (RB not) (ADJP (RB much) (JJ moisture) (PP (IN in) (NP (DT the) (NN air) (NN mass))))) (. .)))
There was not much moisture in the air mass.
(ROOT (S (NP (NP (CD One)) (PP (IN of) (NP (NP (DT the) (NNS properties)) (PP (IN of) (NP (DT an) (NN air) (NN mass)))))) (VP (VBZ is) (SBAR (IN that) (S (NP (DT an) (NN air) (NN mass)) (VP (VBZ has) (NP (NP (JJ similar) (NN temperature) (CC and) (NN moisture) (NNS properties)) (PP (IN throughout) (NP (PRP it)))))))) (. .)))
One of the properties of an air mass is that an air mass has similar temperature and moisture properties throughout it.