Tree-ring Δ14C time series from 1948 to 2018 at a regional background site, China: Influences of atmospheric nuclear weapons tests and fossil fuel emissions

被引：8

作者：

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

Feng, Xue ^{[1
,6
,7
]}

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

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

Liu, Yu ^{[1
,2
,3
]}

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

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

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

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

Mei, Ruochen ^{[8
]}

Li, Qiang ^{[1
,2
]}

Cai, Qiufang ^{[1
,2
]}

机构：

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

[2] CAS Ctr Excellence Quaternary Sci & Global Change, Beijing, 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, Coll Urban & Environm Sci, Shaanxi Key Lab Earth Surface Syst & Environm Car, Xian, Peoples R China

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

[8] Xian Polytech Univ, Sch Environm & Chem Engn, Xian, Peoples R China

来源：

ATMOSPHERIC ENVIRONMENT | 2021年 / 246卷 / 246期

基金：

中国国家自然科学基金;

关键词：

Radiocarbon; Tree ring; Reform and opening-up; Fossil carbon emissions; Half-life; Beijing-tianjin-hebei region; RADIOCARBON CONCENTRATION; TROPOSPHERIC (CO2)-C-14; BOMB RADIOCARBON; CARBON-DIOXIDE; CO2; C-14; DELTA(CO2)-C-14; EXCHANGE; SAMPLES; EUROPE;

D O I：

10.1016/j.atmosenv.2020.118156

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Delta C-14 values were measured from tree-rings (1948-2018) of Pinus tabuliformis Carr. that grew at the Shangdianzi (SDZ) regional background site in China. The objectives of this study are to establish a record of atmospheric Delta C-14, and to evaluate the influences of Chinese atmospheric nuclear tests and fossil carbon emissions on atmospheric Delta C-14 variations. The SDZ tree-ring Delta C-14 values are negative before 1956, and increase dramatically in response to global atmospheric nuclear tests, with a peak value of 844.0 +/- 4.2 parts per thousand in 1964. After the Partial Test Ban Treaty in 1963, the Delta C-14 values at SDZ decrease exponentially during 1964-2018. The half-life of the Delta C-14 decrease was protracted by approximately 2.7 yr during 1964-1984, due to Chinese atmospheric nuclear tests as well as Chinese forests as a carbon source during that period. Massive fossil carbon emissions in China lead to the SDZ decrease rate that is about 1.8 parts per thousand yr(-1) faster than that for the Northern Hemisphere background region during 2000-2010. SDZ Delta C-14 since 2000 show strong negative correlations with fossil carbon emissions from the Beijing-Tianjin-Hebei (BTH) region (r(2) = 0.954) and China (r(2) = 0.950), and a 1%o decrease in SDZ Delta C-14 indicates an increase of 2.3 +/- 0.2 Mt C and 23.3 +/- 1.7 Mt C fossil carbon emissions from the BTH region and China, respectively.

引用

页数：8