Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer
Size-segregated particulate air samples were collected during the austral summer of 2016–2017 at Palmer Station on Anvers Island, western Antarctic Peninsula, to characterize trace elements in aerosols. Trace elements in aerosol samples – including Al, P, Ca, Ti, V, Mn, Ni, Cu, Zn, Ce, and Pb – were...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-21-2105-2021 https://acp.copernicus.org/articles/21/2105/2021/ |
id |
ftcopernicus:oai:publications.copernicus.org:acp86692 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:acp86692 2023-05-15T13:31:40+02:00 Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer Fan, Songyun Gao, Yuan Sherrell, Robert M. Yu, Shun Bu, Kaixuan 2021-02-12 application/pdf https://doi.org/10.5194/acp-21-2105-2021 https://acp.copernicus.org/articles/21/2105/2021/ eng eng doi:10.5194/acp-21-2105-2021 https://acp.copernicus.org/articles/21/2105/2021/ eISSN: 1680-7324 Text 2021 ftcopernicus https://doi.org/10.5194/acp-21-2105-2021 2021-02-15T17:22:13Z Size-segregated particulate air samples were collected during the austral summer of 2016–2017 at Palmer Station on Anvers Island, western Antarctic Peninsula, to characterize trace elements in aerosols. Trace elements in aerosol samples – including Al, P, Ca, Ti, V, Mn, Ni, Cu, Zn, Ce, and Pb – were determined by total digestion and a sector field inductively coupled plasma mass spectrometer (SF-ICP-MS). The crustal enrichment factors (EF crust ) and k -means clustering results of particle-size distributions show that these elements are derived primarily from three sources: (1) regional crustal emissions, including possible resuspension of soils containing biogenic P, (2) long-range transport, and (3) sea salt. Elements derived from crustal sources (Al, P, Ti, V, Mn, Ce) with EF crust <10 were dominated by the coarse-mode particles ( >1.8 µm ) and peaked around 4.4 µm in diameter, reflecting the regional contributions. Non-crustal elements (Ca, Ni, Cu, Zn, Pb) showed EF crust >10 . Aerosol Pb was primarily dominated by fine-mode particles, peaking at 0.14–0.25 µm , and likely was impacted by air masses from southern South America based on air mass back trajectories. However, Ni, Cu, and Zn were not detectable in most size fractions and did not present clear size patterns. Sea-salt elements (Ca, Na + , K + ) showed a single-mode distribution and peaked at 2.5–4.4 µm . The estimated dry deposition fluxes of mineral dust for the austral summer, based on the particle-size distributions of Al measured at Palmer Station, ranged from 0.65 to 28 mg m −2 yr −1 with a mean of 5.5±5.0 mg m −2 yr −1 . The estimated dry deposition fluxes of the target trace elements in this study were lower than most fluxes reported previously for coastal Antarctica and suggest that atmospheric input of trace elements through dry deposition processes may play a minor role in determining trace element concentrations in surface seawater over the continental shelf of the western Antarctic Peninsula. Text Antarc* Antarctic Antarctic Peninsula Antarctica Anvers Island Copernicus Publications: E-Journals Antarctic Antarctic Peninsula Anvers ENVELOPE(-63.500,-63.500,-64.600,-64.600) Anvers Island ENVELOPE(-63.500,-63.500,-64.600,-64.600) Austral Palmer Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Palmer-Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) The Antarctic Atmospheric Chemistry and Physics 21 3 2105 2124 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Size-segregated particulate air samples were collected during the austral summer of 2016–2017 at Palmer Station on Anvers Island, western Antarctic Peninsula, to characterize trace elements in aerosols. Trace elements in aerosol samples – including Al, P, Ca, Ti, V, Mn, Ni, Cu, Zn, Ce, and Pb – were determined by total digestion and a sector field inductively coupled plasma mass spectrometer (SF-ICP-MS). The crustal enrichment factors (EF crust ) and k -means clustering results of particle-size distributions show that these elements are derived primarily from three sources: (1) regional crustal emissions, including possible resuspension of soils containing biogenic P, (2) long-range transport, and (3) sea salt. Elements derived from crustal sources (Al, P, Ti, V, Mn, Ce) with EF crust <10 were dominated by the coarse-mode particles ( >1.8 µm ) and peaked around 4.4 µm in diameter, reflecting the regional contributions. Non-crustal elements (Ca, Ni, Cu, Zn, Pb) showed EF crust >10 . Aerosol Pb was primarily dominated by fine-mode particles, peaking at 0.14–0.25 µm , and likely was impacted by air masses from southern South America based on air mass back trajectories. However, Ni, Cu, and Zn were not detectable in most size fractions and did not present clear size patterns. Sea-salt elements (Ca, Na + , K + ) showed a single-mode distribution and peaked at 2.5–4.4 µm . The estimated dry deposition fluxes of mineral dust for the austral summer, based on the particle-size distributions of Al measured at Palmer Station, ranged from 0.65 to 28 mg m −2 yr −1 with a mean of 5.5±5.0 mg m −2 yr −1 . The estimated dry deposition fluxes of the target trace elements in this study were lower than most fluxes reported previously for coastal Antarctica and suggest that atmospheric input of trace elements through dry deposition processes may play a minor role in determining trace element concentrations in surface seawater over the continental shelf of the western Antarctic Peninsula. |
format |
Text |
author |
Fan, Songyun Gao, Yuan Sherrell, Robert M. Yu, Shun Bu, Kaixuan |
spellingShingle |
Fan, Songyun Gao, Yuan Sherrell, Robert M. Yu, Shun Bu, Kaixuan Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer |
author_facet |
Fan, Songyun Gao, Yuan Sherrell, Robert M. Yu, Shun Bu, Kaixuan |
author_sort |
Fan, Songyun |
title |
Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer |
title_short |
Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer |
title_full |
Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer |
title_fullStr |
Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer |
title_full_unstemmed |
Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer |
title_sort |
concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the antarctic peninsula in austral summer |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-2105-2021 https://acp.copernicus.org/articles/21/2105/2021/ |
long_lat |
ENVELOPE(-63.500,-63.500,-64.600,-64.600) ENVELOPE(-63.500,-63.500,-64.600,-64.600) ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.050,-64.050,-64.770,-64.770) |
geographic |
Antarctic Antarctic Peninsula Anvers Anvers Island Austral Palmer Station Palmer-Station The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Anvers Anvers Island Austral Palmer Station Palmer-Station The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Anvers Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Anvers Island |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-21-2105-2021 https://acp.copernicus.org/articles/21/2105/2021/ |
op_doi |
https://doi.org/10.5194/acp-21-2105-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
3 |
container_start_page |
2105 |
op_container_end_page |
2124 |
_version_ |
1766020000579059712 |