( ( Upwelling Upwelling ) ( ( is ( defined ( as ( ( the rising ) ( of ( ( nutrient-rich water ) ( toward ( ( the ( sea surface ) ) ( -LRB- ( ( ( ( ( Lalli and ) Parsons ) , ) 1993 ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Upwelling) (NNP Upwelling)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (VBG rising)) (PP (IN of) (NP (NP (JJ nutrient-rich) (NN water)) (PP (IN toward) (NP (NP (DT the) (NN sea) (NN surface)) (PRN (-LRB- -LRB-) (NP (NNP Lalli) (CC and) (NNP Parsons)) (, ,) (NP (CD 1993)) (-RRB- -RRB-)))))))))) (. .)))
Upwelling Upwelling is defined as the rising of nutrient-rich water toward the sea surface (Lalli and Parsons, 1993).
(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.