A new hydrological climatic proxy in arid lake sediments: Iodine‑uranium concentrations

Hydrological variation in the past ∼2 kyr is important for understanding the impact and driving forces of climate changes in the present and future, especially in arid areas. Sediment is one of the most useful archives in such a time period, and selection and validation of qualified hydrological pro...

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Bibliographic Details
Published in:Palaeogeography, palaeoclimatology, palaeoecology palaeoclimatology, palaeoecology, 2023-03, Vol.613, p.111409, Article 111409
Main Authors: Zhao, Xue, Hou, Xiaolin, Huang, Zhao, Zhang, Chengjun, Cheng, Peng
Format: Article
Language:English
Subjects:
Climate change
Iodine
Lake sediment
Qaidam Basin
Uranium
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Summary:Hydrological variation in the past ∼2 kyr is important for understanding the impact and driving forces of climate changes in the present and future, especially in arid areas. Sediment is one of the most useful archives in such a time period, and selection and validation of qualified hydrological proxies is the key point for reconstruction of hydrology in the past centuries. However, such research still faces a challenge due to limited knowledge of physiochemical implications of the traditional proxies in the specific lake, and difficulties to discriminate dry-wet from warm-cold signals. Here, a sediment core collected from Keluke Lake, Qaidam Basin, Northwest China was analyzed for iodine and uranium concentrations, to explore their potential as a new hydrological proxy in the arid regions for reconstructing the dry-wet changes during the past ∼2200 years. A significant correlation between iodine and uranium concentrations (r = 0.62, P 
ISSN:0031-0182
1872-616X
DOI:10.1016/j.palaeo.2023.111409