( Upwelling ( ( is ( ( a process ) ( ( in which ) ( ( deep ( , ( cold water ) ) ) ( rises ( toward ( the surface ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Upwelling)) (VP (VBZ is) (NP (NP (DT a) (NN process)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (JJ deep) (, ,) (JJ cold) (NN water)) (VP (VBZ rises) (PP (IN toward) (NP (DT the) (NN surface)))))))) (. .)))
Upwelling is a process in which deep, cold water rises toward the 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.