( ( of ( the water ) ) ( budget ( ( is ( present ( as ( ( ( a gas ) ( -LRB- ( ( water vapor ) -RRB- ) ) ) ( in ( the atmosphere ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN of) (NP (DT the) (NN water))) (NP (NN budget)) (VP (VBZ is) (ADJP (JJ present) (PP (IN as) (NP (NP (NP (DT a) (NN gas)) (PRN (-LRB- -LRB-) (NP (NN water) (NN vapor)) (-RRB- -RRB-))) (PP (IN in) (NP (DT the) (NN atmosphere))))))) (. .)))
of the water budget is present as a gas (water vapor) in the atmosphere.
(ROOT (S (NP (NNP Water) (NN vapor)) (VP (VBZ exists) (PP (IN in) (NP (NP (DT the) (NN atmosphere)) (PP (IN as) (NP (DT an) (JJ invisible) (NN gas))))))))
Water vapor exists in the atmosphere as an invisible gas