Determining diurnal fossil fuel CO2 and biological CO2 by Δ14CO2 observation on certain summer and winter days at Chinese background sites

被引：7

作者：

Niu, Zhenchuan ^{[1
,2
,3
,4
,5
]}

Zhou, Weijian ^{[1
,2
,3
,4
,5
]}

Feng, Xue ^{[1
,6
,9
]}

Hou, Yaoyao ^{[1
,4
,5
]}

Chen, Ning ^{[1
,4
,5
]}

Du, Hua ^{[1
,4
,5
]}

Wu, Shugang ^{[1
,4
,5
]}

Fu, Yunchong ^{[1
,4
,5
]}

Lu, Xuefeng ^{[1
,4
,5
]}

Cheng, Peng ^{[1
,4
,5
]}

Xiong, Xiaohu ^{[1
,4
,5
]}

Wang, Peng ^{[1
,4
,5
]}

Wang, Jianqiong ^{[7
]}

Yao, Jie ^{[8
]}

Zhou, Jie ^{[1
,4
,5
]}

Li, Ming ^{[1
,4
,5
]}

机构：

[1] Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian, Peoples R China

[2] CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China

[3] Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm, Qingdao, Peoples R China

[4] Joint Xian AMS Ctr IEECAS, Shaanxi Prov Key Lab Accelerator Mass Spectrometr, Xian, Peoples R China

[5] Xi An Jiao Tong Univ, Xian, Peoples R China

[6] Northwest Univ, Shaanxi Key Lab Earth Surface Syst & Environm Car, Coll Urban & Environm Sci, Xian, Peoples R China

[7] Waliguan Global Background Stn, Qinghai, Peoples R China

[8] Linan Reg Background Stn, Linan, Zhejiang, Peoples R China

[9] Xian Inst Innovat Earth Environm Res, Xian, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2020年 / 718卷 / 718期

基金：

中国国家自然科学基金;

关键词：

Diurnal atmospheric CO2; Fossil fuel sources; Biological sources; Long-range transport; Radiocarbon; Background sites; ATMOSPHERIC CARBON-DIOXIDE; SEASONAL AMPLITUDE; CENTRAL-EUROPE; DELTA-C-14; (CO2)-C-14; CITY; CALIBRATION; EMISSIONS; TRANSPORT; MEGACITY;

D O I：

10.1016/j.scitotenv.2020.136864

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Diurnal atmospheric Delta(CO2)-C-14 was measured on two consecutive days in summer and winter, 2016 at Shangdianzi, Lin'an and Luhuitou regional background sites, and at Waliguan global background site in China. The objectives of this study were to determine diurnal fossil fuel CO2 (CO2ff) and biological CO2 (CO2bio) concentrations and to ascertain the factors influencing them. Evident CO2ff inputs (0-33.0 +/- 1.4 ppm) were found, with some small morning and afternoon rush hour signals. Particularly, the long-range transport of air masses influenced the seasonal differences and rapid diurnal variations in CO2ff. Diurnal CO2bio showed violent variations (-20.9-113.3 ppm), with high values at night and low or negative values during the daytime. Diurnal CO2bio variations resulted from the tradeoffs between photosynthetic CO2 uptake and biological respiration CO2 emission as well as atmospheric boundary layer heights variations. These results might help to understand the roles of fossil fuel sources and biological sources on atmospheric CO2 diurnal variations at Chinese background sites. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：10

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