Isotopes in groundwater (2 H, 18 O, 14 C) revealed the climate and groundwater recharge in the Northern China

The Science of the Total Environment
Wanjun JiangHui Zhang

Abstract

We collected 3275 sets of δD and δ18O and 1451 14C data of groundwater in 14 basins or plains in the Northern China from the published sources in an attempt to investigate the isotopic characteristics of groundwater and their possible link with groundwater recharge and modern and past climate conditions in regional scales. The results showed that the deuterium excess of groundwater in the Monsoon regions were generally lower than that in the Westerly regions in the Northern China, reflecting the influences of different vapor sources and transmission modes. The δD and δ18O in groundwater lied closely to the Asian summer monsoon limit (ASML) were affected by both the Asian monsoon and Westerlies. The δD and δ18O of groundwater exhibited obvious latitude effect in the monsoon region, while it seemed to be dominated by the continental and elevation effects in the Westerly region both in the late Pleistocene and the Holocene. Based on the isotopic proxy records of climates, the depletion in 18O and D of the groundwater recharged in last glacial period in the late Pleistocene was observed which indicated that it was cooler especially in the Last Glacial Maximum (LGM), while the 18O and D were enriched in groundwater recharged in the ...Continue Reading

Citations

Aug 15, 2021·Environmental Science and Pollution Research International·Wanjun JiangSheming Chen

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