Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect
We present here the first mercury speciation study in the water column of the Southern Ocean, using a high-resolution south-to-north section (27 stations from 65.50°S to 44.00°S) with up to 15 depths (0-4440 m) between Antarctica and Tasmania (Australia) along the 140°E meridian. In addition, in ord...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.808385 2024-09-15T17:42:02+00:00 Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect Cossa, Daniel Heimbürger, Lars-Eric Lannuzel, Delphine Rintoul, Stephen R Butler, Edward C V Bowie, Andrew R Averty, Bernard Watson, Roslyn J Remenyi, Tomas MEDIAN LATITUDE: -62.445973 * MEDIAN LONGITUDE: 121.434000 * SOUTH-BOUND LATITUDE: -66.218500 * WEST-BOUND LONGITUDE: 110.650500 * NORTH-BOUND LATITUDE: -43.998670 * EAST-BOUND LONGITUDE: 146.321830 * DATE/TIME START: 2008-03-28T00:00:00 * DATE/TIME END: 2009-11-20T00:00:00 2011 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.808385 https://doi.org/10.1594/PANGAEA.808385 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.808385 https://doi.org/10.1594/PANGAEA.808385 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Cossa, Daniel; Heimbürger, Lars-Eric; Lannuzel, Delphine; Rintoul, Stephen R; Butler, Edward C V; Bowie, Andrew R; Averty, Bernard; Watson, Roslyn J; Remenyi, Tomas (2011): Mercury in the Southern Ocean. Geochimica et Cosmochimica Acta, 75(14), 4037-4052, https://doi.org/10.1016/j.gca.2011.05.001 GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes International Polar Year (2007-2008) IPY dataset publication series 2011 ftpangaea https://doi.org/10.1594/PANGAEA.80838510.1016/j.gca.2011.05.001 2024-07-24T02:31:21Z We present here the first mercury speciation study in the water column of the Southern Ocean, using a high-resolution south-to-north section (27 stations from 65.50°S to 44.00°S) with up to 15 depths (0-4440 m) between Antarctica and Tasmania (Australia) along the 140°E meridian. In addition, in order to explore the role of sea ice in Hg cycling, a study of mercury speciation in the 'snow-sea ice-seawater' continuum was conducted at a coastal site, near the Australian Casey station (66.40°S; 101.14°E). In the open ocean waters, total Hg (Hg(T)) concentrations varied from 0.63 to 2.76 pmol/L with 'transient-type' vertical profiles and a latitudinal distribution suggesting an atmospheric mercury source south of the Southern Polar Front (SPF) and a surface removal north of the Subantartic Front (SAF). Slightly higher mean Hg(T) concentrations (1.35 ± 0.39 pmol/L) were measured in Antarctic Bottom Water (AABW) compared to Antarctic Intermediate water (AAIW) (1.15 ± 0.22 pmol/L). Labile Hg (Hg(R)) concentrations varied from 0.01 to 2.28 pmol/L, with a distribution showing that the Hg(T) enrichment south of the SPF consisted mainly of Hg(R) (67 ± 23%), whereas, in contrast, the percentage was half that in surface waters north of PFZ (33 ± 23%). Methylated mercury species (MeHg(T)) concentrations ranged from 0.02 to 0.86 pmol/L. All vertical MeHg(T) profiles exhibited roughly the same pattern, with low concentrations observed in the surface layer and increasing concentrations with depth up to an intermediate depth maximum. As for Hg(T), low mean MeHg(T) concentrations were associated with AAIW, and higher ones with AABW. The maximum of MeHg(T) concentration at each station was systematically observed within the oxygen minimum zone, with a statistically significant MeHg(T) vs Apparent Oxygen Utilization (AOU) relationship (p <0.001). The proportion of Hg(T) as methylated species was lower than 5% in the surface waters, around 50% in deep waters below 1000 m, reaching a maximum of 78% south of the SPF. At Casey ... Other/Unknown Material Antarc* Antarctic Antarctica International Polar Year IPY Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(110.650500,146.321830,-43.998670,-66.218500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes International Polar Year (2007-2008) IPY |
spellingShingle |
GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes International Polar Year (2007-2008) IPY Cossa, Daniel Heimbürger, Lars-Eric Lannuzel, Delphine Rintoul, Stephen R Butler, Edward C V Bowie, Andrew R Averty, Bernard Watson, Roslyn J Remenyi, Tomas Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect |
topic_facet |
GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes International Polar Year (2007-2008) IPY |
description |
We present here the first mercury speciation study in the water column of the Southern Ocean, using a high-resolution south-to-north section (27 stations from 65.50°S to 44.00°S) with up to 15 depths (0-4440 m) between Antarctica and Tasmania (Australia) along the 140°E meridian. In addition, in order to explore the role of sea ice in Hg cycling, a study of mercury speciation in the 'snow-sea ice-seawater' continuum was conducted at a coastal site, near the Australian Casey station (66.40°S; 101.14°E). In the open ocean waters, total Hg (Hg(T)) concentrations varied from 0.63 to 2.76 pmol/L with 'transient-type' vertical profiles and a latitudinal distribution suggesting an atmospheric mercury source south of the Southern Polar Front (SPF) and a surface removal north of the Subantartic Front (SAF). Slightly higher mean Hg(T) concentrations (1.35 ± 0.39 pmol/L) were measured in Antarctic Bottom Water (AABW) compared to Antarctic Intermediate water (AAIW) (1.15 ± 0.22 pmol/L). Labile Hg (Hg(R)) concentrations varied from 0.01 to 2.28 pmol/L, with a distribution showing that the Hg(T) enrichment south of the SPF consisted mainly of Hg(R) (67 ± 23%), whereas, in contrast, the percentage was half that in surface waters north of PFZ (33 ± 23%). Methylated mercury species (MeHg(T)) concentrations ranged from 0.02 to 0.86 pmol/L. All vertical MeHg(T) profiles exhibited roughly the same pattern, with low concentrations observed in the surface layer and increasing concentrations with depth up to an intermediate depth maximum. As for Hg(T), low mean MeHg(T) concentrations were associated with AAIW, and higher ones with AABW. The maximum of MeHg(T) concentration at each station was systematically observed within the oxygen minimum zone, with a statistically significant MeHg(T) vs Apparent Oxygen Utilization (AOU) relationship (p <0.001). The proportion of Hg(T) as methylated species was lower than 5% in the surface waters, around 50% in deep waters below 1000 m, reaching a maximum of 78% south of the SPF. At Casey ... |
format |
Other/Unknown Material |
author |
Cossa, Daniel Heimbürger, Lars-Eric Lannuzel, Delphine Rintoul, Stephen R Butler, Edward C V Bowie, Andrew R Averty, Bernard Watson, Roslyn J Remenyi, Tomas |
author_facet |
Cossa, Daniel Heimbürger, Lars-Eric Lannuzel, Delphine Rintoul, Stephen R Butler, Edward C V Bowie, Andrew R Averty, Bernard Watson, Roslyn J Remenyi, Tomas |
author_sort |
Cossa, Daniel |
title |
Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect |
title_short |
Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect |
title_full |
Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect |
title_fullStr |
Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect |
title_full_unstemmed |
Mercury species concentrations near Casey station, Antarctica and along the SR3 CASO-GEOTRACES transect |
title_sort |
mercury species concentrations near casey station, antarctica and along the sr3 caso-geotraces transect |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.808385 https://doi.org/10.1594/PANGAEA.808385 |
op_coverage |
MEDIAN LATITUDE: -62.445973 * MEDIAN LONGITUDE: 121.434000 * SOUTH-BOUND LATITUDE: -66.218500 * WEST-BOUND LONGITUDE: 110.650500 * NORTH-BOUND LATITUDE: -43.998670 * EAST-BOUND LONGITUDE: 146.321830 * DATE/TIME START: 2008-03-28T00:00:00 * DATE/TIME END: 2009-11-20T00:00:00 |
long_lat |
ENVELOPE(110.650500,146.321830,-43.998670,-66.218500) |
genre |
Antarc* Antarctic Antarctica International Polar Year IPY Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica International Polar Year IPY Sea ice Southern Ocean |
op_source |
Supplement to: Cossa, Daniel; Heimbürger, Lars-Eric; Lannuzel, Delphine; Rintoul, Stephen R; Butler, Edward C V; Bowie, Andrew R; Averty, Bernard; Watson, Roslyn J; Remenyi, Tomas (2011): Mercury in the Southern Ocean. Geochimica et Cosmochimica Acta, 75(14), 4037-4052, https://doi.org/10.1016/j.gca.2011.05.001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.808385 https://doi.org/10.1594/PANGAEA.808385 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.80838510.1016/j.gca.2011.05.001 |
_version_ |
1810488374846291968 |