Meltwater Contribution to Lake Water Budget in Mid-Latitude Asia During the Deglaciation and Early Holocene

Jiawei Jiang, Hu Liu, Qingfeng Jiang, Yuan Pin Chang, Mu Song, Bowen Meng, Huanye Wang, Yunning Cao, Ji Shen, Sergey Krivonogov, Weiguo Liu, Zhonghui Liu

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Contrasting moisture evolutions between westerlies-dominated Central Asia and monsoonal Asia since the mid-Holocene have been widely recognized. Yet, inconsistent hydrological records over the early Holocene from both regions hamper our understanding of hydroclimatic changes and associated mechanisms. Here we present isotopic and biomarker (alkenone) records from three Chinese lakes located at both regions to address a possible meltwater role in lake water budget. Our results show the occurrence of particularly depleted isotopic values of lake water associated with lake freshening within the deglaciation and early Holocene. Together with anomalously old 14C dates, which were also documented in many other Asian lakes, our observations likely indicate substantial meltwater contribution to mid-latitude Asian lake water budget, along with the climatic warming. Hence, the potential meltwater effect should be considered when inferring Asian summer monsoon and westerlies behavior over this critical period, with important implications to Holocene hydrological reconstructions and future hydroclimatic projections.

Язык оригиналаанглийский
Номер статьиe2022GL100229
ЖурналGeophysical Research Letters
Том49
Номер выпуска22
DOI
СостояниеОпубликовано - 28 нояб. 2022

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