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Co‐existence of temperature and amount effects on precipitation δ 18 O in the Asian monsoon region
Author(s) -
Yang Xiaoxin,
Yao Tandong,
Yang Wulin,
Yu Wusheng,
Qu Dongmei
Publication year - 2011
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2011gl049353
Subject(s) - precipitation , monsoon , climatology , δ18o , environmental science , latitude , atmospheric sciences , isotopes of oxygen , stable isotope ratio , geology , meteorology , geography , physics , geodesy , geochemistry , quantum mechanics
Whether stable oxygen isotope ( δ 18 O) in precipitation obeys the temperature effect and/or amount effect in the monsoon region has long been controversial. An intensive, precipitation event‐based sampling project has been carried out at Guangzhou and Changsha stations in southeast China under the Asian monsoon influence. By dividing a year into summer and winter half years at respective station, we find prevalence of amount effect at both stations throughout the year. δ 18 O‐temperature presents complex correlations, with the positive correlation significant at Guangzhou during the summer half year and at Changsha during the winter half year, but vague at either station during the rest of the year; the former attributable to a third mode of convection, while the latter indicative of the weakening monsoon influence accompanied by intensified local recycling. Our high‐resolution data demonstrate a significant coexistence of temperature and amount effects of precipitation δ 18 O in the monsoon domain, conducive to climatic interpretation of δ 18 O in paleoclimate proxies in mid/low latitudes.