Gypsum formation from calcite in the atmosphere recorded in aerosol particles transported and trapped in Greenland ice core sample is a signature of secular change of SO2 emission in East Asia
Gypsum formation from calcite in the atmosphere recorded in aerosol particles transported and trapped in Greenland ice core sample is a signature of secular change of SO2 emission in East Asia
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格陵兰冰芯样本中运输和捕获的气溶胶颗粒中记录的大气中方解石形成的石膏是东亚 SO2 排放长期变化的标志
DOI：
10.1016/j.atmosenv.2022.119061
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发表时间：
2022
影响因子：
5
通讯作者：
Takahashi Yoshio
中科院分区：
文献类型：
--
作者：
Miyamoto Chihiro;Iizuka Yoshinori;Matoba Sumito;Hattori Shohei;Takahashi Yoshio
利用X射线吸收近边结构谱（XANES）研究了春季格陵兰东南部冰芯气溶胶（尘埃）颗粒中的钙（Ca）物种。冰芯记录了1957年至2014年的气溶胶，并选择了1971年，1978年，1987年，1995年和2004年的样本进行分析。结果表明，冰芯中石膏含量占总钙的比例在最近的冰芯层（1995年和2004年）中大于老冰芯层（1971年、1978年和1987年），而方解石含量则呈现相反的趋势。石膏含量的增加与中国SO2年排放量的增加相一致。考虑到含钙尘埃颗粒最初是以来自东亚的方解石形式提供的，这项研究表明，被困在冰芯中的尘埃中的钙物种可以很好地指示该地区SO2排放的长期变化。
Calcium (Ca) species in aerosol (dust) particles trapped during spring in an ice core at Southeast Greenland (SE-Dome) were examined using X-ray absorption near-edge structure spectroscopy (XANES). The ice core has a record of aerosols from 1957 to 2014, and the samples corresponding to 1971, 1978, 1987, 1995, and 2004 were selected for analysis. Results showed that gypsum fraction to total Ca in the ice core was larger in the recent layers (1995 and 2004) than in the old layers (1971, 1978, and 1987), whereas calcite fraction exhibited the opposite trend. The increased gypsum content was consistent with the increase of SO2annual emission in China. Given that Ca-bearing dust particles were originally supplied as calcite derived from East Asia, this study suggests that the Ca species in the dust trapped in the ice core can be a good indicator of the secular variation of SO2emission in this region.