State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of AMS Technology and Application, National Center for AMS in Xi'an, Xi'an, 710061, China.
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of AMS Technology and Application, National Center for AMS in Xi'an, Xi'an, 710061, China; Xi'an Jiaotong University, Xi'an, 710049, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China; Xi'an Institute for Innovative Earth Environment Research, Xi'an, 710061, China.
Chemosphere. 2021 Jun;272:129921. doi: 10.1016/j.chemosphere.2021.129921. Epub 2021 Feb 10.
Radiocarbon (C) is a unique and important tool for understanding carbon cycle in the nature, and its use can be significantly enhanced where reliable historical atmospheric ΔCO records can be established. In China, continuous atmospheric ΔCO records since the 1950s are scarce, a period when dramatic variations of ΔCO occurred caused by intensive human activities. In this research, ΔC of Qinghai spruce tree rings collected from Huangzhong (HZ) (36.27°N, 101.67°E, 2982 m amsl) were measured by Accelerator Mass Spectrometry, and a ΔCO time series from 1957 to 2015 was reconstructed. The results show that HZ ΔC was generally higher than the contemporaneous average level in the mid-high latitudes of the Northern Hemisphere. The peak value of HZ ΔC occurred in 1964 (as bomb peak) was higher than that of other tree ring records in East Asia at a similar latitude, likely due to the impact of the atmosphere nuclear tests at Semipalatinsk (Kazakhstan). The record shows no obvious disturbance of Lop Nor nuclear weapons tests (in Northwest China) during 1964-1980, except for 1971. A local Suess effect began to appear since 2001, and the estimated atmospheric fossil fuel-derived CO (CO) concentration increased from 3.5 ppm to 8.8 ppm from 2006 to 2015. This is associated with the implementation of the "Western Development" strategy in China. HZ ΔC records document background ΔC data, useful for regional carbon cycle research and atmospheric CO quantification in the region. These data also provide baseline values for assessment environmental safety connected with nuclear power plants in China.
放射性碳 (C) 是理解自然界碳循环的独特而重要的工具，在能够建立可靠的历史大气 ΔCO 记录的情况下，其用途可以得到显著增强。在中国，自 20 世纪 50 年代以来连续的大气 ΔCO 记录稀缺，这一时期由于人类活动的强烈影响，ΔCO 发生了巨大变化。在这项研究中，通过加速器质谱仪测量了来自湟中 (HZ) (36.27°N, 101.67°E, 2982 m amsl) 的青海云杉树轮中的 ΔC，并重建了 1957 年至 2015 年的 ΔCO 时间序列。结果表明，HZ ΔC 普遍高于同期北半球中高纬度的平均水平。HZ ΔC 的峰值出现在 1964 年（作为原子弹峰），高于东亚同纬度其他树木年轮记录的峰值，这可能是由于哈萨克斯坦塞米巴拉金斯克的大气核试验的影响。该记录显示，1964-1980 年期间，除 1971 年外，洛浦核武器试验（中国西北部）没有明显干扰。自 2001 年以来，局部苏斯效应开始出现，估计大气中源自化石燃料的 CO（CO）浓度从 2006 年到 2015 年从 3.5 ppm 增加到 8.8 ppm。这与中国实施的“西部大开发”战略有关。HZ ΔC 记录提供了背景 ΔC 数据，可用于区域碳循环研究和该地区大气 CO 的定量分析。这些数据还为评估中国核电站的环境安全提供了基准值。
