H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands
Temporal and spatial variations of the hydrogen peroxide accumulation were measured in off-shore waters and in intertidal rockpools near Jubany Station, King George Island, South Shetland Islands. As H 2 O 2 photoformation is mainly driven by the short wavelength radiation in the UV-B and the UV-A r...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/s095410209900019x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410209900019X |
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crcambridgeupr:10.1017/s095410209900019x 2024-03-03T08:37:43+00:00 H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands Abele, Doris Ferreyra, Gustavo A. Schloss, Irene 1999 http://dx.doi.org/10.1017/s095410209900019x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410209900019X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 11, issue 2, page 131-139 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1999 crcambridgeupr https://doi.org/10.1017/s095410209900019x 2024-02-08T08:32:26Z Temporal and spatial variations of the hydrogen peroxide accumulation were measured in off-shore waters and in intertidal rockpools near Jubany Station, King George Island, South Shetland Islands. As H 2 O 2 photoformation is mainly driven by the short wavelength radiation in the UV-B and the UV-A range of the solar spectrum, the study was conducted between the beginning of October and the end of December 1995, the period of Antarctic spring ozone depletion. Wet deposition of H 2 O 2 containing snow was identified as a major source of hydrogen peroxide in the surface waters of Potter Cove. As the concentrations of dissolved organic carbon (DOC) in Potter Cove surface waters were low (121 ± 59 μmol Cl −1 ), when compared to the highly eutrophicated waters on the German Wadden coast (6000–7000 μmol Cl −1 ), direct UV-induced DOC photo-oxidation was of only limited significance in the Antarctic sampling site. Nonetheless, under experimental conditions, H 2 O 2 photoformation in Potter Cove surface waters amounted to 90 ± 40 nmol H 2 O 2 h −1 l −1 under a UV-transparent quartz plate. When high energy UV-B photons were cut-off by a WG320 filter formation continued at a rate of 66 ± 29 nmol H 2 O 2 h −1 l −1 due to UV-A and visible light photons. Samples from freshly deposited snow contained between 10 000 and 13 600 nmol H 2 O 2 l −1 , and a snowfall event in mid November resulted in a maximum concentration of 1450 nmol H 2 O 2 l −1 in the upper 10 cm layer of Potter Cove surface waters. Maximal H 2 O 2 concentrations in intertidal rockpools were even higher and reached up to 2000 nmol H 2 O 2 l −1 after the snowfall event. During a grid survey on December 17 1995, H 2 O 2 concentrations and salinity displayed a north to south gradient, with higher concentrations and PSU at the south coast of the cove. The reasons for this spatial inhomogenety are as yet unknown, but may relate to a minor local input of photo-reactive organic matter from creeks entering the cove in the south-east, as well as to waste water discharge ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Science King George Island South Shetland Islands Cambridge University Press Antarctic The Antarctic King George Island South Shetland Islands Potter Cove Antarctic Science 11 2 131 139 |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Abele, Doris Ferreyra, Gustavo A. Schloss, Irene H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Temporal and spatial variations of the hydrogen peroxide accumulation were measured in off-shore waters and in intertidal rockpools near Jubany Station, King George Island, South Shetland Islands. As H 2 O 2 photoformation is mainly driven by the short wavelength radiation in the UV-B and the UV-A range of the solar spectrum, the study was conducted between the beginning of October and the end of December 1995, the period of Antarctic spring ozone depletion. Wet deposition of H 2 O 2 containing snow was identified as a major source of hydrogen peroxide in the surface waters of Potter Cove. As the concentrations of dissolved organic carbon (DOC) in Potter Cove surface waters were low (121 ± 59 μmol Cl −1 ), when compared to the highly eutrophicated waters on the German Wadden coast (6000–7000 μmol Cl −1 ), direct UV-induced DOC photo-oxidation was of only limited significance in the Antarctic sampling site. Nonetheless, under experimental conditions, H 2 O 2 photoformation in Potter Cove surface waters amounted to 90 ± 40 nmol H 2 O 2 h −1 l −1 under a UV-transparent quartz plate. When high energy UV-B photons were cut-off by a WG320 filter formation continued at a rate of 66 ± 29 nmol H 2 O 2 h −1 l −1 due to UV-A and visible light photons. Samples from freshly deposited snow contained between 10 000 and 13 600 nmol H 2 O 2 l −1 , and a snowfall event in mid November resulted in a maximum concentration of 1450 nmol H 2 O 2 l −1 in the upper 10 cm layer of Potter Cove surface waters. Maximal H 2 O 2 concentrations in intertidal rockpools were even higher and reached up to 2000 nmol H 2 O 2 l −1 after the snowfall event. During a grid survey on December 17 1995, H 2 O 2 concentrations and salinity displayed a north to south gradient, with higher concentrations and PSU at the south coast of the cove. The reasons for this spatial inhomogenety are as yet unknown, but may relate to a minor local input of photo-reactive organic matter from creeks entering the cove in the south-east, as well as to waste water discharge ... |
format |
Article in Journal/Newspaper |
author |
Abele, Doris Ferreyra, Gustavo A. Schloss, Irene |
author_facet |
Abele, Doris Ferreyra, Gustavo A. Schloss, Irene |
author_sort |
Abele, Doris |
title |
H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands |
title_short |
H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands |
title_full |
H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands |
title_fullStr |
H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands |
title_full_unstemmed |
H 2 O 2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands |
title_sort |
h 2 o 2 accumulation from photochemical production and atmospheric wet deposition in antarctic coastal and off-shore waters of potter cove, king george island, south shetland islands |
publisher |
Cambridge University Press (CUP) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1017/s095410209900019x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410209900019X |
geographic |
Antarctic The Antarctic King George Island South Shetland Islands Potter Cove |
geographic_facet |
Antarctic The Antarctic King George Island South Shetland Islands Potter Cove |
genre |
Antarc* Antarctic Antarctic Science King George Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Science King George Island South Shetland Islands |
op_source |
Antarctic Science volume 11, issue 2, page 131-139 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s095410209900019x |
container_title |
Antarctic Science |
container_volume |
11 |
container_issue |
2 |
container_start_page |
131 |
op_container_end_page |
139 |
_version_ |
1792501009397841920 |