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Organic acids: Differences in ice core records between Glacier 1, Tianshan, China and the polar areas

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Chinese Science Bulletin

Abstract

Formate (HCOO), acetate (CH3COO), oxalate (C2O 2−4 ) and pyruvate ((CO2O 2−4 ) are detected in a 14.08-m-long ice core recovered in Glacier 1 at the Urumqi riverhead, Tianshan, China, which is a mid-latitude alpine glacier (43°06′N, 86°49′E). the mean concentrations for the four organic acids in recent four decades are (102.8 ± 147.3), (392.3±390.8), (6.9 ± 14.8) and (4.2 ± 8.3) ng/g, respectively, with the ratio for HCOO2−/CH3COO” of 0.34 ± 0.43. They represent the major acid components, and originate mainly from anthropogenic emission in the nearby industrial cities. Compared with Greenland and Antarctica, Glacier 1 is much higher in carboxylic acids, which were not subjected to long distance transportation as well as complicated atmospheric reactions. The alpine glacier can be, therefore, useful to reconstructing human pollution scenario to the regional atmosphere.

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Li, X., Qin, D. & Zhou, H. Organic acids: Differences in ice core records between Glacier 1, Tianshan, China and the polar areas. Chin.Sci.Bull. 46, 80–83 (2001). https://doi.org/10.1007/BF03183216

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