( ( Aerosol ( light absorption ) ) ( ( is ( ( due mostly ) ( to ( ( black ( carbon particles ) ) ( ( which , ) ( ( unlike ( the ( better-understood sulfate ) ) ) ( ( ( aerosols ( that ( scatter sunlight ) ) ) , ) ( actually ( ( ( ( ( ( ( absorb ( radiative energy ) ) and ) convert ) it ) ( to heat ) ) , ) ( ( warming ( the atmosphere ) ) ( around them ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Aerosol) (JJ light) (NN absorption)) (VP (VBZ is) (ADJP (JJ due) (RB mostly) (PP (TO to) (NP (NP (JJ black) (NN carbon) (NNS particles)) (SBAR (WHNP (WDT which)) (, ,) (S (PP (IN unlike) (NP (DT the) (JJ better-understood) (NN sulfate))) (VP (VBZ aerosols) (NP (DT that) (NN scatter) (NN sunlight)) (, ,) (S (VP (ADVP (RB actually)) (VB absorb) (NP (JJ radiative) (NN energy)) (CC and) (VB convert) (NP (PRP it)) (PP (TO to) (NP (NN heat))) (, ,) (S (VP (VBG warming) (NP (DT the) (NN atmosphere)) (PP (IN around) (NP (PRP them)))))))))))))) (. .)))
Aerosol light absorption is due mostly to black carbon particles which, unlike the better-understood sulfate aerosols that scatter sunlight, actually absorb radiative energy and convert it to heat, warming the atmosphere around them.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (VP (VBN placed) (PP (IN in) (NP (JJ direct) (NN sunlight)))))) (, ,) (NP (DT a) (JJ black) (NN sweater)) (VP (MD will) (VP (VB absorb) (NP (DT the) (ADJP (RBS most) (JJ visible)) (NN light) (NN energy)))) (. .)))