Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer
Observations of atmospheric mercury over the Southern Ocean and Antarctica are still limited. We performed a ship cruise from Cape Point, South Africa, to the Indian Bharati station, Prydz Bay, Antarctica (42.72°S 24.52°E to 69.41°S 76.19°E, 2015.01.18–27) and subsequently stationed the ship near th...
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ftlithuaniansrc:oai:elaba:108523949 2023-05-15T13:37:47+02:00 Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer Unagar, Ajaykumar Hashmi, Azharuddin Tiwari, Anoop K. Jawak, Shridhar D. Desai, Brijesh Urba, Andriejus Qureshi, Asif 2021 http://ftmc.lvb.lt/FTMC:ELABAPDB108523949&prefLang=en_US lit eng lit eng info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apr.2021.101226 http://ftmc.lvb.lt/FTMC:ELABAPDB108523949&prefLang=en_US Atmospheric pollution research, Izmir, Turkey : Turkish National Committee for Air Pollution Research and Control, 2021, vol. 12, iss. 12, art. no. 101226, p. 1-14 ISSN 1309-1042 Antarctica Southern ocean gaseous elemental mercury CVAAS info:eu-repo/semantics/article 2021 ftlithuaniansrc https://doi.org/10.1016/j.apr.2021.101226 2021-12-02T01:36:42Z Observations of atmospheric mercury over the Southern Ocean and Antarctica are still limited. We performed a ship cruise from Cape Point, South Africa, to the Indian Bharati station, Prydz Bay, Antarctica (42.72°S 24.52°E to 69.41°S 76.19°E, 2015.01.18–27) and subsequently stationed the ship near the Bharati till 2015.02.19. We report relatively constant values of gaseous elemental mercury (GEM) concentration during the cruise (1.08 ± 0.08 ng/m3, n = 541) and highly variable values at the coast (0.96 ± 0.36 ng/m3, n = 1050). Meteorological parameters: relative humidity, temperature and solar radiation had almost negligible effect on GEM concentration (adjusted R2 = 0.09 in multiple linear regression model) during the ship cruise and a limited effect on GEM (adjusted R2 = 0.34) during the ship stay at Bharati. Analysis of NOAA-HYSPLIT 24-h back trajectories showed that all trajectories were extremely shallow during the ship cruise and therefore results likely were affected by the marine boundary layer rather than long-range transport. On the other hand, highly variable values of GEM near Bharati station were explained as a result of interplay of shallow and descending air masses coming from the Antarctic coast and from the terrain. These factors together with temperature dependency indicated that the coast of Antarctica acted as a temperature-driven source of GEM during the austral summer. Measurements were performed with a portable atomic absorption (CVAAS) mercury analyzer model Gardis-5. In our knowledge, this was the first time the CVAAS method was successfully applied for the background Antarctic observations. Article in Journal/Newspaper Antarc* Antarctic Antarctica Prydz Bay Southern Ocean LSRC VL (Lithuanian Social Research Centre Virtual Library) Antarctic Austral Indian Prydz Bay Southern Ocean The Antarctic Atmospheric Pollution Research 12 12 101226 |
institution |
Open Polar |
collection |
LSRC VL (Lithuanian Social Research Centre Virtual Library) |
op_collection_id |
ftlithuaniansrc |
language |
Lithuanian English |
topic |
Antarctica Southern ocean gaseous elemental mercury CVAAS |
spellingShingle |
Antarctica Southern ocean gaseous elemental mercury CVAAS Unagar, Ajaykumar Hashmi, Azharuddin Tiwari, Anoop K. Jawak, Shridhar D. Desai, Brijesh Urba, Andriejus Qureshi, Asif Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer |
topic_facet |
Antarctica Southern ocean gaseous elemental mercury CVAAS |
description |
Observations of atmospheric mercury over the Southern Ocean and Antarctica are still limited. We performed a ship cruise from Cape Point, South Africa, to the Indian Bharati station, Prydz Bay, Antarctica (42.72°S 24.52°E to 69.41°S 76.19°E, 2015.01.18–27) and subsequently stationed the ship near the Bharati till 2015.02.19. We report relatively constant values of gaseous elemental mercury (GEM) concentration during the cruise (1.08 ± 0.08 ng/m3, n = 541) and highly variable values at the coast (0.96 ± 0.36 ng/m3, n = 1050). Meteorological parameters: relative humidity, temperature and solar radiation had almost negligible effect on GEM concentration (adjusted R2 = 0.09 in multiple linear regression model) during the ship cruise and a limited effect on GEM (adjusted R2 = 0.34) during the ship stay at Bharati. Analysis of NOAA-HYSPLIT 24-h back trajectories showed that all trajectories were extremely shallow during the ship cruise and therefore results likely were affected by the marine boundary layer rather than long-range transport. On the other hand, highly variable values of GEM near Bharati station were explained as a result of interplay of shallow and descending air masses coming from the Antarctic coast and from the terrain. These factors together with temperature dependency indicated that the coast of Antarctica acted as a temperature-driven source of GEM during the austral summer. Measurements were performed with a portable atomic absorption (CVAAS) mercury analyzer model Gardis-5. In our knowledge, this was the first time the CVAAS method was successfully applied for the background Antarctic observations. |
format |
Article in Journal/Newspaper |
author |
Unagar, Ajaykumar Hashmi, Azharuddin Tiwari, Anoop K. Jawak, Shridhar D. Desai, Brijesh Urba, Andriejus Qureshi, Asif |
author_facet |
Unagar, Ajaykumar Hashmi, Azharuddin Tiwari, Anoop K. Jawak, Shridhar D. Desai, Brijesh Urba, Andriejus Qureshi, Asif |
author_sort |
Unagar, Ajaykumar |
title |
Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer |
title_short |
Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer |
title_full |
Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer |
title_fullStr |
Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer |
title_full_unstemmed |
Coast of Eastern Antarctica as the source of atmospheric mercury during austral summer |
title_sort |
coast of eastern antarctica as the source of atmospheric mercury during austral summer |
publishDate |
2021 |
url |
http://ftmc.lvb.lt/FTMC:ELABAPDB108523949&prefLang=en_US |
geographic |
Antarctic Austral Indian Prydz Bay Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Indian Prydz Bay Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Prydz Bay Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Prydz Bay Southern Ocean |
op_source |
Atmospheric pollution research, Izmir, Turkey : Turkish National Committee for Air Pollution Research and Control, 2021, vol. 12, iss. 12, art. no. 101226, p. 1-14 ISSN 1309-1042 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apr.2021.101226 http://ftmc.lvb.lt/FTMC:ELABAPDB108523949&prefLang=en_US |
op_doi |
https://doi.org/10.1016/j.apr.2021.101226 |
container_title |
Atmospheric Pollution Research |
container_volume |
12 |
container_issue |
12 |
container_start_page |
101226 |
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1766097697799929856 |