Temperature Variations and Possible Forcing Mechanisms over the Past 300 Years Recorded at Lake Chaonaqiu in the Western Loess Plateau

Keke Yu, Le Wang, Lipeng Liu, Enguo Sheng, Xingxing Liu and Jianghu Lan
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Keke Yu: College of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, China
Le Wang: College of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, China
Lipeng Liu: College of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, China
Enguo Sheng: Department of Resource and Environment, Zunyi Normal College, Zunyi 563002, China
Xingxing Liu: State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China
Jianghu Lan: State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China

Sustainability, 2021, vol. 13, issue 20, 1-15

Abstract: Understanding the synchronicity of and discrepancy among temperature variations on the western Loess Plateau (WLP), China, is critical for establishing the drivers of regional temperature variability. Here we present an authigenic carbonate-content timeseries spanning the last 300 years from sediments collected from Lake Chaonaqiu in the Liupan Mountains, WLP, as a decadal-scale record of temperature. Our results reveal six periods of relatively low temperature, during the intervals AD 1743–1750, 1770–1780, 1792–1803, 1834–1898, 1930–1946, and 1970–1995, and three periods of relatively high temperature during 1813–1822, 1910–1928, and since 2000. These findings are consistent with tree-ring datasets from the WLP and correlate well with extreme cold and warm events documented in historical literature. Our temperature reconstruction is also potentially representative of large-scale climate patterns over northern China and more broadly over the Northern Hemisphere. The Pacific Decadal Oscillation (PDO) might be the dominant factor affecting temperature variations over the WLP on decadal timescales.

Keywords: authigenic carbonate; temperature variations; Lake Chaonaqiu; western loess plateau (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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