Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica
Abstract The sulfur stable isotopic values (δ34S) of sulfate aerosols can be used to assess oxidation pathways and contributions from various sources, such as marine biogenic sulfur, volcanoes, and sea salt. However, because of a lack of observations, the spatial distribution of δ34S values in Antar...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2016-06-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/2016GL069482 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849725631460278272 |
|---|---|
| author | Ryu Uemura Kosuke Masaka Kotaro Fukui Yoshinori Iizuka Motohiro Hirabayashi Hideaki Motoyama |
| author_facet | Ryu Uemura Kosuke Masaka Kotaro Fukui Yoshinori Iizuka Motohiro Hirabayashi Hideaki Motoyama |
| author_sort | Ryu Uemura |
| collection | DOAJ |
| description | Abstract The sulfur stable isotopic values (δ34S) of sulfate aerosols can be used to assess oxidation pathways and contributions from various sources, such as marine biogenic sulfur, volcanoes, and sea salt. However, because of a lack of observations, the spatial distribution of δ34S values in Antarctic sulfate aerosols remains unclear. Here we present the first sulfur isotopic values from surface snow samples along a latitudinal transect in eastern Dronning Maud Land, East Antarctica. The δ34S values of sulfate showed remarkably uniform values, in the range of 14.8–16.9‰, and no significant decrease toward the inland part of the transect was noted. These results suggest that net isotopic fractionation during long‐range transport is insignificant. Thus, the δ34S values can be used to infer source contributions. The δ34S values suggest that marine biogenic sulfur is the dominant source of sulfate aerosols, with a fractional contribution of 84 ± 16%. |
| format | Article |
| id | doaj-art-6bfff0d07d33461ab265bdb84c0431bb |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-6bfff0d07d33461ab265bdb84c0431bb2025-08-20T03:10:25ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143115878588510.1002/2016GL069482Sulfur isotopic composition of surface snow along a latitudinal transect in East AntarcticaRyu Uemura0Kosuke Masaka1Kotaro Fukui2Yoshinori Iizuka3Motohiro Hirabayashi4Hideaki Motoyama5Department of Chemistry, Biology and Marine Science, Faculty of Science University of the Ryukyus Okinawa JapanDepartment of Chemistry, Biology and Marine Science, Faculty of Science University of the Ryukyus Okinawa JapanTateyama Caldera Sabo Museum Toyama JapanInstitute of Low Temperature Science Hokkaido University Sapporo JapanNational Institute of Polar Research Tokyo JapanNational Institute of Polar Research Tokyo JapanAbstract The sulfur stable isotopic values (δ34S) of sulfate aerosols can be used to assess oxidation pathways and contributions from various sources, such as marine biogenic sulfur, volcanoes, and sea salt. However, because of a lack of observations, the spatial distribution of δ34S values in Antarctic sulfate aerosols remains unclear. Here we present the first sulfur isotopic values from surface snow samples along a latitudinal transect in eastern Dronning Maud Land, East Antarctica. The δ34S values of sulfate showed remarkably uniform values, in the range of 14.8–16.9‰, and no significant decrease toward the inland part of the transect was noted. These results suggest that net isotopic fractionation during long‐range transport is insignificant. Thus, the δ34S values can be used to infer source contributions. The δ34S values suggest that marine biogenic sulfur is the dominant source of sulfate aerosols, with a fractional contribution of 84 ± 16%.https://doi.org/10.1002/2016GL069482sulfur isotopessulfate aerosolsDMSAntarcticaclimateice core |
| spellingShingle | Ryu Uemura Kosuke Masaka Kotaro Fukui Yoshinori Iizuka Motohiro Hirabayashi Hideaki Motoyama Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica Geophysical Research Letters sulfur isotopes sulfate aerosols DMS Antarctica climate ice core |
| title | Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica |
| title_full | Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica |
| title_fullStr | Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica |
| title_full_unstemmed | Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica |
| title_short | Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica |
| title_sort | sulfur isotopic composition of surface snow along a latitudinal transect in east antarctica |
| topic | sulfur isotopes sulfate aerosols DMS Antarctica climate ice core |
| url | https://doi.org/10.1002/2016GL069482 |
| work_keys_str_mv | AT ryuuemura sulfurisotopiccompositionofsurfacesnowalongalatitudinaltransectineastantarctica AT kosukemasaka sulfurisotopiccompositionofsurfacesnowalongalatitudinaltransectineastantarctica AT kotarofukui sulfurisotopiccompositionofsurfacesnowalongalatitudinaltransectineastantarctica AT yoshinoriiizuka sulfurisotopiccompositionofsurfacesnowalongalatitudinaltransectineastantarctica AT motohirohirabayashi sulfurisotopiccompositionofsurfacesnowalongalatitudinaltransectineastantarctica AT hideakimotoyama sulfurisotopiccompositionofsurfacesnowalongalatitudinaltransectineastantarctica |