[Water-Air Interface CO2 Exchange Flux of Typical Lakes in a Mountainous Area of the Western Chongqing and Their Influencing Factors]

Jia-Chen Luo; Mao-Fei Ni; Si-Yue Li

doi:10.13227/j.hjkx.201805065

[Water-Air Interface CO₂ Exchange Flux of Typical Lakes in a Mountainous Area of the Western Chongqing and Their Influencing Factors]

Huan Jing Ke Xue. 2019 Jan 8;40(1):192-199. doi: 10.13227/j.hjkx.201805065.

[Article in Chinese]

Authors

Jia-Chen Luo^{1

2}, Mao-Fei Ni^{1

2}, Si-Yue Li¹

Affiliations

¹ Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.
² University of Chinese Academy of Sciences, Beijing 100049, China.

PMID: 30628275
DOI: 10.13227/j.hjkx.201805065

Abstract

To examine the mountainous lake CO₂ evasion in Southwest China, partial pressures of carbon dioxide[p(CO₂)] and the CO₂ exchange flux[F(CO₂)] via the water-air interface of nine mountainous lakes in Chongqing, China, have been studied in summer using the thin boundary layer model (TBL) and floating chambers. Key water quality parameters were concomitantly measured. The results indicate that the pCO₂ in the mountainous lakes in western Chongqing ranges from 2.1 to 45.0 Pa, with a mean value of (18.1±12.1) Pa. The mean CO₂ fluxes calculated by the TBL model and chamber method are (-8.0±2.9), (-3.4±3.6), and (-7.1±22.3) mmol·(m²·d)^-1, respectively. The p(CO₂) and F(CO₂) have positive correlations with the wind speed and ORP but negative correlations with the pH. Our study indicates that mountainous lakes are atmospheric sinks of CO₂ and the TBL model should be cautiously adopted.

Keywords: CO2 absorption; environmental factor; mountainous lake; static chamber method; thin boundary layer method.

Publication types

English Abstract