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14C Measurements of Dissolved Inorganic and Organic Carbon in Qinghai Lake and Inflowing Rivers (NE Tibet, Qinghai Plateau), China

Published online by Cambridge University Press:  26 July 2016

A J T Jull ,
G S Burr ,
W Zhou ,
P Cheng ,
S H Song ,
A G Leonard ,
L Cheng  and
Z S An
A J T Jull*
Affiliation:
NSF-Arizona AMS Laboratory, University of Arizona, Tucson, Arizona 85721, USA Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA Department of Physics, University of Arizona, Tucson, Arizona 85721, USA Institute for Nuclear Research, Hungarian Academy of Sciences, 4026 Debrecen, Hungary
G S Burr
Affiliation:
NSF-Arizona AMS Laboratory, University of Arizona, Tucson, Arizona 85721, USA Department of Physics, University of Arizona, Tucson, Arizona 85721, USA Department of Geosciences, National Taiwan University, Taipei, Taiwan
W Zhou
Affiliation:
Xi'an AMS Laboratory, Institute of Earth and Environmental Sciences, Chinese Academy of Sciences, Xi'an 710075, China
P Cheng
Affiliation:
Xi'an AMS Laboratory, Institute of Earth and Environmental Sciences, Chinese Academy of Sciences, Xi'an 710075, China
S H Song
Affiliation:
Xi'an AMS Laboratory, Institute of Earth and Environmental Sciences, Chinese Academy of Sciences, Xi'an 710075, China
A G Leonard
Affiliation:
NSF-Arizona AMS Laboratory, University of Arizona, Tucson, Arizona 85721, USA Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA
L Cheng
Affiliation:
NSF-Arizona AMS Laboratory, University of Arizona, Tucson, Arizona 85721, USA
Z S An
Affiliation:
Xi'an AMS Laboratory, Institute of Earth and Environmental Sciences, Chinese Academy of Sciences, Xi'an 710075, China
*
5. Corresponding author. Email: jull@email.arizona.edu.
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Abstract

There have been a number of studies that have attempted to estimate the past radiocarbon reservoir effects in Qinghai Lake, China. This article reports on measurements on modern samples collected at the lake in October 2003 and October 2009, which allow us to better understand the systematics of the lake and shed new insights on the processes occurring in the lake. The results indicate that atmospheric exchange of 14C is the main process affecting surface dissolved inorganic carbon (DIC) in the lake, but dissolved organic carbon (DOC) can be explained as a combination of sources. We also conclude that sediment carbon can be explained by a model where input from the surrounding rivers and groundwater are important, in agreement with the model of Yu et al. (2007).

Type
Articles
Information
Radiocarbon , Volume 56 , Issue 3 , 2014 , pp. 1115 - 1127
Copyright
Copyright © 2014 by the Arizona Board of Regents on behalf of the University of Arizona 

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