( ( ( Continued ( theoretical work ) ) ( concerning ( ( ( ( ( ( the photochemistry ) ( of ( minor constituents ) ) ) , ) ( ( the structure ) ( of ( ( mesopause environment ) ( at ( high latitudes ) ) ) ) ) ) and ) ( ( ( ( auroral and ) airglow ) spectroscopy ) ( including ( ( the ( chemical modeling ) ) ( of ( the ( polar ( ( mesosphere and ) stratosphere ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (JJ Continued) (JJ theoretical) (NN work)) (PP (VBG concerning) (NP (NP (NP (DT the) (NN photochemistry)) (PP (IN of) (NP (JJ minor) (NNS constituents)))) (, ,) (NP (NP (DT the) (NN structure)) (PP (IN of) (NP (NP (JJ mesopause) (NN environment)) (PP (IN at) (NP (JJ high) (NNS latitudes)))))) (CC and) (NP (NP (ADJP (JJ auroral) (CC and) (JJ airglow)) (NN spectroscopy)) (PP (VBG including) (NP (NP (DT the) (JJ chemical) (NN modeling)) (PP (IN of) (NP (DT the) (JJ polar) (NN mesosphere) (CC and) (NN stratosphere)))))))) (. .)))
Continued theoretical work concerning the photochemistry of minor constituents, the structure of mesopause environment at high latitudes and auroral and airglow spectroscopy including the chemical modeling of the polar mesosphere and stratosphere.
(ROOT (S (NP (DT The) (NN mesopause)) (VP (VBZ is) (PP (IN at) (NP (NP (DT the) (NN top)) (PP (IN of) (NP (DT the) (NN mesosphere)))))) (. .)))