Fig. 2: Concentration levels and emission estimates of CCl4.
From: CCl4 emissions in eastern China during 2021–2022 and exploration of potential new sources
a Time series of CCl4 concentrations at ZJU (cyan line) and SHH (lilac dot) sites during 2021–2022. b Comparison of CCl4 emission estimates in this study (red diamond with the error bars representing ±1 standard deviation) with those from previous studies7,8,9,10,11,12,21. ZJU Zhejiang University, SHH Shanghuang, UNEP United Nations Environment Program.
