( This ( ( ( causes ( the ( stronger effect ) ) ) ( in ( repsonsible ( for ( ( a stream ) ( of ( fast ( moving ( westerlie jet ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ causes) (NP (DT the) (JJR stronger) (NN effect)) (PP (IN in) (NP (NP (NN repsonsible)) (PP (IN for) (NP (NP (DT a) (NN stream)) (PP (IN of) (S (VP (ADVP (RB fast)) (VBG moving) (NP (JJ westerlie) (NN jet)))))))))) (. .)))
This causes the stronger effect in repsonsible for a stream of fast moving westerlie jet.
(ROOT (S (NP (NNP Jet) (NNP streams)) (VP (VBP are) (ADVP (RB fast)) (VP (VBG moving) (NP (NP (NNS rivers)) (PP (IN of) (NP (NN air))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBG going) (PP (IN in) (NP (NP (JJ opposite) (NNS directions)) (VP (VBN called))))))))))) (. .)))
Jet streams are fast moving rivers of air that are going in opposite directions called.