The atmospheric iron variations during 1950–2016 recorded in snow at Dome Argus, East Antarctica
The atmospheric iron variations during 1950–2016 recorded in snow at Dome Argus, East Antarctica
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南极洲东部阿格斯圆顶雪记录的1950-2016年大气铁变化
DOI：
10.1016/j.atmosres.2020.105263
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发表时间：
2021-01
影响因子：
5.5
通讯作者：
Jiajia Wang
中科院分区：
文献类型：
--
作者：
Ke Liu;Shugui Hou;Shuangye Wu;Hongxi Pang;Wangbin Zhang;Jing Song;Jinhai Yu;Xiang Zou;Jiajia Wang
2015-2016年南极洲南部夏季，从南极东部圆顶阿古斯(Dome A)一个4.5米长的雪坑中采集了174个雪样。它们涵盖了1950至2016年间的一段时间。用电感耦合等离子体质谱(ICPMS)测定样品中的铁含量。测定了总可溶态铁(TDFe)和溶解态铁(DFE)，以评估铁的溶解度分数(FFS)，这是决定生物活性铁有效性的重要变量。结果表明，−2a−1平均通量为0.019 mg/m，DFE通量为2.254×10−3 mg/m−2a−1，平均通量为7.27%，与前人对南极冰盖的研究结果一致。根据目前和以前研究的TDFe通量的平均值，估计南极现代雪的大气TDFe通量为19-140Tg×10−3 mg/m−2a−1，可能支持10.5-76.5Tg C a−1的初级生产力。这约占南大洋季节性海冰带年初级生产量的1.21-8.80%，表明大气DFE是Fe供应的一个次要组成部分。
174 snow samples were collected from a 4.5 m snow pit at Dome Argus (Dome A), East Antarctica, during the 2015–2016 austral summer. They covered a period between 1950 and 2016. These samples were measured for iron (Fe) concentrations by the inductively coupled plasma mass spectrometry (ICP-MS). Both the total dissolvable Fe (TDFe) and dissolved Fe (DFe) were measured in order to evaluate the fractional Fe solubility (FFS), an important variable to determine the Fe availability for biological activities. The results show an average TDFe flux of 0.019 mg m−2a−1and DFe flux of 2.254 × 10−3mg m−2a−1at Dome A. The mean FFS of 7.27% is consistent with previous studies on the Antarctic ice sheet. Based on the mean value of the TDFe fluxes from both the current and previous studies, the atmospheric TDFe flux in Antarctic modern snow was estimated at 19–140 × 10−3mg m−2a−1, potentially supporting 10.5–76.5 Tg C a−1of primary production. This accounts about 1.21–8.80% of the annual primary production in the seasonal sea ice zone of Southern Ocean (SO), suggesting that atmospheric DFe is a minor component of Fe supply.
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DOI：
10.1002/2016jd024957
发表时间：
2016-09
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
Minako Kurisu;Y. Takahashi;T. Iizuka;M. Uematsu
通讯作者：
Minako Kurisu;Y. Takahashi;T. Iizuka;M. Uematsu
影响因子：
--
作者：
Grotti, M.;Soggia, F.;Magi, E.
通讯作者：
Magi, E.
DOI：
10.1007/s41976-019-00012-y
发表时间：
2019-03
期刊：
Remote Sensing in Earth Systems Sciences
影响因子：
--
作者：
S. C. Tripathy;Babula Jena
通讯作者：
S. C. Tripathy;Babula Jena
影响因子：
2.9
作者：
Xiao Cunde;Yuansheng Li;I. Allison;Shugui Hou;G. Dreyfus;J. Barnola;J. Ren;Lingen Bian;
通讯作者：
Xiao Cunde;Yuansheng Li;I. Allison;Shugui Hou;G. Dreyfus;J. Barnola;J. Ren;Lingen Bian;
影响因子：
5.2
作者：
G. Zhuang;Zhen Yi;R. Duce;P. Brown
通讯作者：
G. Zhuang;Zhen Yi;R. Duce;P. Brown