( ( ( Upwelling ( Movement ( of ( nutrient-rich ( bottom water ) ) ) ) ) ( to ( ( the ( ocean 's ) ) surface ) ) ) . )
(ROOT (S (VP (VBG Upwelling) (NP (NP (NNP Movement)) (PP (IN of) (NP (JJ nutrient-rich) (JJ bottom) (NN water)))) (PP (TO to) (NP (NP (DT the) (NN ocean) (POS 's)) (NN surface)))) (. .)))
Upwelling Movement of nutrient-rich bottom water to the ocean's surface.
(ROOT (S (NP (NNP Upwelling)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (SBAR (WHADVP (WRB when)) (S (NP (JJ deep) (NN ocean) (NN water)) (VP (VBZ rises) (PP (TO to) (NP (DT the) (NN surface))))))))) (. .)))
Upwelling is the term for when deep ocean water rises to the surface.