Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica
Antarctic ice core nitrate (NO3−) can provide a unique record of the atmospheric reactive nitrogen cycle. However, the factors influencing the deposition and preservation of NO3− at the ice sheet surface must first be understood. Therefore, an intensive program of snow and atmospheric sampling was m...
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Copernicus Publications
2018
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Online Access: | https://doi.org/10.5194/tc-12-1177-2018 https://www.the-cryosphere.net/12/1177/2018/tc-12-1177-2018.pdf https://doaj.org/article/fe9cdd2216e3438295f8d5e8993bc813 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:fe9cdd2216e3438295f8d5e8993bc813 2023-05-15T13:47:31+02:00 Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica G. Shi M. G. Hastings J. Yu T. Ma Z. Hu C. An C. Li H. Ma S. Jiang Y. Li 2018-04-01 https://doi.org/10.5194/tc-12-1177-2018 https://www.the-cryosphere.net/12/1177/2018/tc-12-1177-2018.pdf https://doaj.org/article/fe9cdd2216e3438295f8d5e8993bc813 en eng Copernicus Publications doi:10.5194/tc-12-1177-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/1177/2018/tc-12-1177-2018.pdf https://doaj.org/article/fe9cdd2216e3438295f8d5e8993bc813 undefined The Cryosphere, Vol 12, Pp 1177-1194 (2018) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/tc-12-1177-2018 2023-01-22T18:58:19Z Antarctic ice core nitrate (NO3−) can provide a unique record of the atmospheric reactive nitrogen cycle. However, the factors influencing the deposition and preservation of NO3− at the ice sheet surface must first be understood. Therefore, an intensive program of snow and atmospheric sampling was made on a traverse from the coast to the ice sheet summit, Dome A, East Antarctica. Snow samples in this observation include 120 surface snow samples (top ∼ 3 cm), 20 snow pits with depths of 150 to 300 cm, and 6 crystal ice samples (the topmost needle-like layer on Dome A plateau). The main purpose of this investigation is to characterize the distribution pattern and preservation of NO3− concentrations in the snow in different environments. Results show that an increasing trend of NO3− concentrations with distance inland is present in surface snow, and NO3− is extremely enriched in the topmost crystal ice (with a maximum of 16.1 µeq L−1). NO3− concentration profiles for snow pits vary between coastal and inland sites. On the coast, the deposited NO3− was largely preserved, and the archived NO3− fluxes are dominated by snow accumulation. The relationship between the archived NO3− and snow accumulation rate can be depicted well by a linear model, suggesting a homogeneity of atmospheric NO3− levels. It is estimated that dry deposition contributes 27–44 % of the archived NO3− fluxes, and the dry deposition velocity and scavenging ratio for NO3− were relatively constant near the coast. Compared to the coast, the inland snow shows a relatively weak correlation between archived NO3− and snow accumulation, and the archived NO3− fluxes were more dependent on concentration. The relationship between NO3− and coexisting ions (nssSO42−, Na+ and Cl−) was also investigated, and the results show a correlation between nssSO42− (fine aerosol particles) and NO3− in surface snow, while the correlation between NO3− and Na+ (mainly associated with coarse aerosol particles) is not significant. In inland snow, there were no significant ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet The Cryosphere Unknown Antarctic East Antarctica The Cryosphere 12 4 1177 1194 |
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op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir G. Shi M. G. Hastings J. Yu T. Ma Z. Hu C. An C. Li H. Ma S. Jiang Y. Li Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica |
topic_facet |
geo envir |
description |
Antarctic ice core nitrate (NO3−) can provide a unique record of the atmospheric reactive nitrogen cycle. However, the factors influencing the deposition and preservation of NO3− at the ice sheet surface must first be understood. Therefore, an intensive program of snow and atmospheric sampling was made on a traverse from the coast to the ice sheet summit, Dome A, East Antarctica. Snow samples in this observation include 120 surface snow samples (top ∼ 3 cm), 20 snow pits with depths of 150 to 300 cm, and 6 crystal ice samples (the topmost needle-like layer on Dome A plateau). The main purpose of this investigation is to characterize the distribution pattern and preservation of NO3− concentrations in the snow in different environments. Results show that an increasing trend of NO3− concentrations with distance inland is present in surface snow, and NO3− is extremely enriched in the topmost crystal ice (with a maximum of 16.1 µeq L−1). NO3− concentration profiles for snow pits vary between coastal and inland sites. On the coast, the deposited NO3− was largely preserved, and the archived NO3− fluxes are dominated by snow accumulation. The relationship between the archived NO3− and snow accumulation rate can be depicted well by a linear model, suggesting a homogeneity of atmospheric NO3− levels. It is estimated that dry deposition contributes 27–44 % of the archived NO3− fluxes, and the dry deposition velocity and scavenging ratio for NO3− were relatively constant near the coast. Compared to the coast, the inland snow shows a relatively weak correlation between archived NO3− and snow accumulation, and the archived NO3− fluxes were more dependent on concentration. The relationship between NO3− and coexisting ions (nssSO42−, Na+ and Cl−) was also investigated, and the results show a correlation between nssSO42− (fine aerosol particles) and NO3− in surface snow, while the correlation between NO3− and Na+ (mainly associated with coarse aerosol particles) is not significant. In inland snow, there were no significant ... |
format |
Article in Journal/Newspaper |
author |
G. Shi M. G. Hastings J. Yu T. Ma Z. Hu C. An C. Li H. Ma S. Jiang Y. Li |
author_facet |
G. Shi M. G. Hastings J. Yu T. Ma Z. Hu C. An C. Li H. Ma S. Jiang Y. Li |
author_sort |
G. Shi |
title |
Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica |
title_short |
Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica |
title_full |
Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica |
title_fullStr |
Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica |
title_full_unstemmed |
Nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (Dome A) in East Antarctica |
title_sort |
nitrate deposition and preservation in the snowpack along a traverse from coast to the ice sheet summit (dome a) in east antarctica |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-1177-2018 https://www.the-cryosphere.net/12/1177/2018/tc-12-1177-2018.pdf https://doaj.org/article/fe9cdd2216e3438295f8d5e8993bc813 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 1177-1194 (2018) |
op_relation |
doi:10.5194/tc-12-1177-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/1177/2018/tc-12-1177-2018.pdf https://doaj.org/article/fe9cdd2216e3438295f8d5e8993bc813 |
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undefined |
op_doi |
https://doi.org/10.5194/tc-12-1177-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
4 |
container_start_page |
1177 |
op_container_end_page |
1194 |
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1766247256986484736 |