Climatic controls on the stable isotopic composition of precipitation in Northeast Asia

Climate Research

Andrew J. Grundstein¹  David B. Wenner¹  Kwang-Sik Lee¹  Dae-Ha Lee¹  Man-Sik Choi¹  Nam-Chil Woo¹ 

关键词: Oxygen;    Hydrogen;    Isotopic composition;    Precipitation;    Deuterium excess values;    Northeast Asia;    Jeju Island;    Korea;   

DOI  :  10.3354/cr023137

来源: Inter-Research Science Publishing

【 摘 要 】

ABSTRACT: An examination of oxygen and hydrogen isotopic compositions of precipitation in NE Asia from the IAEA/WMO data set reveals that many sites have a distinct winter-summer seasonal pattern in deuterium excess (d-) values that appears to reflectdifferent climatic conditions. To further understand this pattern, stable isotopic data were obtained for individual rainfall events over a 2 yr period at Jeju Island, Korea. The δ18O- andδD-values of precipitation at Jeju Island are not dependent upon temperature. However, the deuterium excess values, which range from 3.0 to 40.6‰, show a distinct seasonal variation with higher d-values in winter(>~15‰) and lower values in summer (~10‰). Such a seasonal variation is closely related to different air masses affecting the island during different seasons: a cold-dry continental polar air mass in winter and a hot-humid maritime tropicalair mass in summer.

【 授权许可】

Unknown