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| Title |
A Global Assessment of Copper, Zinc, and Lead Isotopes in Mineral Dust Sources and Aerosols
|
|---|---|
| Published in |
Frontiers in Earth Science, June 2020
|
| DOI | 10.3389/feart.2020.00167 |
| Authors |
Nina J. Schleicher, Shuofei Dong, Hollie Packman, Susan H. Little, Raquel Ochoa Gonzalez, Jens Najorka, Youbin Sun, Dominik J. Weiss |
| Abstract |
<p>The stable isotope compositions of Cu and Zn in major geochemical reservoirs are increasingly studied with the aim to develop these isotope systems as tools to investigate the global biogeochemical cycles of these trace metals. The objectives of the present study were (i) to expand the range of Cu, Zn, and Pb isotope compositions of mineral dust by analyzing samples from major mineral dust sources in Asia and Africa (Chinese Loess Plateau, Chinese deserts, Thar desert, Sahel region) and (ii) to assess the potential impact of human activities on the isotope composition of aerosols by synthesizing published Cu and Zn isotope compositions in aerosols and natural and anthropogenic sources. For the newly analyzed mineral dust areas in Asia and Africa, δ<sup>65</sup>Cu<sub>NIST−976</sub> values range from −0.54 to +0.52‰, δ<sup>66</sup>Zn<sub>JMC−Lyon</sub> values from −0.07 to +0.57‰, and <sup>206</sup>Pb/<sup>204</sup>Pb values from 18.522 to 19.696. We find a significant geographic control with samples from the Thar Desert having the heaviest isotopic compositions (δ<sup>65</sup>Cu<sub>NIST−976</sub> = +0.48 ± 0.06‰, δ<sup>66</sup>Zn<sub>JMC−Lyon</sub> = +0.49 ± 0.11‰) and samples from the Sahel and the Badain Jaran desert having the lightest Zn isotope composition (δ<sup>66</sup>Zn<sub>JMC−Lyon</sub> = +0.19 ± 0.15‰ and +0.07 ± 0.07‰, respectively). We find important variations in the isotope signatures between particle size fractions with heavier isotopic compositions in the smallest and largest particle size fractions and lighter isotopic compositions in the mid particle size fractions. Associations with the mineralogical composition are less clear. Newly analyzed aerosol samples for Beijing and Xi'an show δ<sup>65</sup>Cu<sub>NIST−976</sub> values of +0.29 ± 0.19‰ and +0.16 ± 0.04‰, δ<sup>66</sup>Zn<sub>JMC−Lyon</sub> values of −0.36 ± 0.04‰ and +0.02 ± 0.06‰, and <sup>206</sup>Pb/<sup>204</sup>Pb values of 18.129 ± 0.003 and 18.031 ± 0.003, respectively. Based on a synthesis of published and novel data, we suggest improved ranges and mean values for the isotopic composition of mineral dust from selected locations in Asia and Africa and of anthropogenic sources such as non-exhaust traffic emissions, combustion, electroplating and galvanization. This should serve as a valuable reference for future studies using these isotope systems. This paper demonstrates univocally that human activity introduces a wide range of Zn isotope compositions into the atmospheric environment and, thus, impacts the biogeochemical cycle of Zn.</p> |
X Demographics
The data shown below were collected from the profiles of 5 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Switzerland | 1 | 20% |
| Unknown | 4 | 80% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 3 | 60% |
| Scientists | 2 | 40% |
Mendeley readers
The data shown below were compiled from readership statistics for 44 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 44 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 8 | 18% |
| Student > Ph. D. Student | 7 | 16% |
| Student > Bachelor | 5 | 11% |
| Student > Doctoral Student | 3 | 7% |
| Student > Master | 3 | 7% |
| Other | 4 | 9% |
| Unknown | 14 | 32% |
| Readers by discipline | Count | As % |
|---|---|---|
| Earth and Planetary Sciences | 14 | 32% |
| Environmental Science | 4 | 9% |
| Arts and Humanities | 1 | 2% |
| Physics and Astronomy | 1 | 2% |
| Business, Management and Accounting | 1 | 2% |
| Other | 2 | 5% |
| Unknown | 21 | 48% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 17 June 2020.
All research outputs
#14,485,464
of 23,213,531 outputs
Outputs from Frontiers in Earth Science
#1,451
of 4,805 outputs
Outputs of similar age
#222,400
of 399,175 outputs
Outputs of similar age from Frontiers in Earth Science
#89
of 183 outputs
Altmetric has tracked 23,213,531 research outputs across all sources so far. This one is in the 35th percentile – i.e., 35% of other outputs scored the same or lower than it.
So far Altmetric has tracked 4,805 research outputs from this source. They receive a mean Attention Score of 4.8. This one has gotten more attention than average, scoring higher than 67% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 399,175 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 41st percentile – i.e., 41% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 183 others from the same source and published within six weeks on either side of this one. This one is in the 48th percentile – i.e., 48% of its contemporaries scored the same or lower than it.