Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer
An in situ measurement system was developed for continuous observations of the mole fractions of atmospheric oxygen (defined as δ(O2/N2)) and carbon dioxide (CO2) and the continuous observation was conducted onboard the research vessel SHIRASE 5003 during its voyage between Australia and Syowa Stati...
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ftnipr:oai:nipr.repo.nii.ac.jp:00016830 2023-05-15T13:49:00+02:00 Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer 2021-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16830 http://id.nii.ac.jp/1291/00016700/ en eng https://doi.org/10.1016/j.polar.2021.100691 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16830 http://id.nii.ac.jp/1291/00016700/ Polar Science, 29, 100691(2021-09) 18739652 Atmospheric oxygen O2/N2 Southern ocean JARE Journal Article 2021 ftnipr https://doi.org/10.1016/j.polar.2021.100691 2022-12-03T19:43:21Z An in situ measurement system was developed for continuous observations of the mole fractions of atmospheric oxygen (defined as δ(O2/N2)) and carbon dioxide (CO2) and the continuous observation was conducted onboard the research vessel SHIRASE 5003 during its voyage between Australia and Syowa Station, Antarctica, in 2017–2018. The CO2 variation was low with respect to that of δ(O2/N2) in the Southern Ocean, suggesting that the land biospheric and fossil-fuel derived CO2 and O2 emissions negligibly influenced the observations. Therefore, the observed significant variations in the atmospheric O2/N2 can be attributed to the atmosphere-ocean gas exchange. During the southbound voyage in December 2017, we observed large spatial variations in δ(O2/N2) due to marine biological production on the western side of the cruise track. Oceanic O2 fluxes based on a simple model and atmospheric δ(O2/N2) variability were consistent with past oceanic observations. No clear longitudinal gradient in δ(O2/N2) was observed at latitudes toward south of 60° S in December 2017 and February–March 2018. However, local δ(O2/N2) maxima were observed in regions with active marine biological production in December 2017. These observations indicate that local O2 fluxes can also modify the spatial distribution of atmospheric δ(O2/N2) in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctica Polar Science Polar Science Southern Ocean National Institute of Polar Research Repository, Japan Southern Ocean Austral Syowa Station Polar Science 29 100691 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Atmospheric oxygen O2/N2 Southern ocean JARE |
spellingShingle |
Atmospheric oxygen O2/N2 Southern ocean JARE Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer |
topic_facet |
Atmospheric oxygen O2/N2 Southern ocean JARE |
description |
An in situ measurement system was developed for continuous observations of the mole fractions of atmospheric oxygen (defined as δ(O2/N2)) and carbon dioxide (CO2) and the continuous observation was conducted onboard the research vessel SHIRASE 5003 during its voyage between Australia and Syowa Station, Antarctica, in 2017–2018. The CO2 variation was low with respect to that of δ(O2/N2) in the Southern Ocean, suggesting that the land biospheric and fossil-fuel derived CO2 and O2 emissions negligibly influenced the observations. Therefore, the observed significant variations in the atmospheric O2/N2 can be attributed to the atmosphere-ocean gas exchange. During the southbound voyage in December 2017, we observed large spatial variations in δ(O2/N2) due to marine biological production on the western side of the cruise track. Oceanic O2 fluxes based on a simple model and atmospheric δ(O2/N2) variability were consistent with past oceanic observations. No clear longitudinal gradient in δ(O2/N2) was observed at latitudes toward south of 60° S in December 2017 and February–March 2018. However, local δ(O2/N2) maxima were observed in regions with active marine biological production in December 2017. These observations indicate that local O2 fluxes can also modify the spatial distribution of atmospheric δ(O2/N2) in the Southern Ocean. |
format |
Article in Journal/Newspaper |
title |
Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer |
title_short |
Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer |
title_full |
Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer |
title_fullStr |
Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer |
title_full_unstemmed |
Shipboard observations of atmospheric oxygen in the Southern Ocean during the 2017–2018 austral summer |
title_sort |
shipboard observations of atmospheric oxygen in the southern ocean during the 2017–2018 austral summer |
publishDate |
2021 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16830 http://id.nii.ac.jp/1291/00016700/ |
geographic |
Southern Ocean Austral Syowa Station |
geographic_facet |
Southern Ocean Austral Syowa Station |
genre |
Antarc* Antarctica Polar Science Polar Science Southern Ocean |
genre_facet |
Antarc* Antarctica Polar Science Polar Science Southern Ocean |
op_relation |
https://doi.org/10.1016/j.polar.2021.100691 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16830 http://id.nii.ac.jp/1291/00016700/ Polar Science, 29, 100691(2021-09) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2021.100691 |
container_title |
Polar Science |
container_volume |
29 |
container_start_page |
100691 |
_version_ |
1766250395942780928 |