( ( ( ( ( Earth ( observation satellites ) ) , ) ( such ( as ( ( ESA 's ) ( ATSR satellites ) ) ) ) ) , ) ( ( ( ( ( ( make ( use ( of ( the infrared ) ) ) ) ( to ( monitor ( sea ( surface temperatures ) ) ) ) ) , ) and ) ( can ( track ( the ( ( build up ) ( of ( events ( such ( as ( El Nino ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Earth) (NN observation) (NNS satellites)) (, ,) (PP (JJ such) (IN as) (NP (NP (NNP ESA) (POS 's)) (JJ ATSR) (NNS satellites))) (, ,)) (VP (VP (VBP make) (NP (NP (NN use)) (PP (IN of) (NP (DT the) (NN infrared)))) (S (VP (TO to) (VP (VB monitor) (NP (NN sea) (NN surface) (NNS temperatures)))))) (, ,) (CC and) (VP (MD can) (VP (VB track) (S (NP (DT the)) (VP (VB build) (PRT (RP up)) (PP (IN of) (NP (NP (NNS events)) (PP (JJ such) (IN as) (NP (NNP El) (NNP Nino)))))))))) (. .)))
Earth observation satellites, such as ESA's ATSR satellites, make use of the infrared to monitor sea surface temperatures, and can track the build up of events such as El Nino.
(ROOT (S (NP (NNS Satellites)) (VP (VBP are) (NP (NP (JJ man-made) (NNS devices)) (PP (IN in) (NP (NN space))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN used) (S (VP (TO to) (VP (VB observe) (NP (NP (DT the) (NN earth) (POS 's)) (NN surface))))))))))) (. .)))