( ( ( ( Stratosphere ( ( the ( stable layer ) ) ( of atmosphere ) ) ) directly ) ( above ( the troposphere ) ) ) . )
(ROOT (S (VP (VB Stratosphere) (NP (NP (DT the) (JJ stable) (NN layer)) (PP (IN of) (NP (NN atmosphere)))) (ADVP (RB directly)) (PP (IN above) (NP (DT the) (NNP troposphere)))) (. .)))
Stratosphere the stable layer of atmosphere directly above the troposphere.
(ROOT (S (NP (DT The) (NN stratosphere)) (VP (VBZ is) (NP (NP (DT the) (NN layer)) (PP (IN above) (NP (DT the) (NNP troposphere))))) (. .)))