ˈɔːlsoʊ ɹᵻflˈɛkts lˈoʊkəl ɪvˌæpɚɹˈeɪʃən ænd fɹˈɛʃwɔːɾɚɹ ˈɪnpʊt, æz ɹˈeɪnwɔːɾɚɹ ɪz sˈɪkstiːn ˈoʊɛnɹˈɪtʃt—ɐ ɹɪzˈʌlt ʌvðə pɹˌɛfɚɹˈɛnʃəl ɪvˌæpɚɹˈeɪʃən ʌvðə lˈaɪɾɚ sˈɪkstiːn ˈoʊ fɹʌm sˈiːwɔːɾɚ.
also reflects local evaporation and freshwater input, as rainwater is 16O-enriched—a result of the preferential evaporation of the lighter 16O from seawater.