Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean
Oceans account for more than 25% of anthropogenic CO2 removal from the atmosphere. Changes in our global climate have affected the Arctic Ocean in particular, resulting in increasing rates of warming and record-low sea ice extent, which for example, in the summer of 2012, was only half of the averag...
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ftwellesleycoll:oai:repository.wellesley.edu:ir_852 2023-05-15T14:50:08+02:00 Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean Ji, Brenda Y (author) Biological Sciences (department) 2018 https://repository.wellesley.edu/islandora/object/ir%3A852/datastream/TN/view/Towards%20understanding%20the%20variability%20between%20rates%20of%20biological%20productivity%20in%20the%20Beaufort%20Gyre%20of%20the%20Arctic%20Ocean.jpg unknown ir:852 local: WCTC_2018_JiBrendaY_Towardsunderstanding thesiscollection:584 https://repository.wellesley.edu/islandora/object/ir%3A852/datastream/TN/view/Towards%20understanding%20the%20variability%20between%20rates%20of%20biological%20productivity%20in%20the%20Beaufort%20Gyre%20of%20the%20Arctic%20Ocean.jpg Academic theses 2018 ftwellesleycoll 2022-05-23T14:21:10Z Oceans account for more than 25% of anthropogenic CO2 removal from the atmosphere. Changes in our global climate have affected the Arctic Ocean in particular, resulting in increasing rates of warming and record-low sea ice extent, which for example, in the summer of 2012, was only half of the average over the previous three decades. It is unclear how these changes in the Arctic Ocean may affect biological productivity, which is one of the main drivers of the oceanic carbon cycle as CO2is consumed through photosynthesis and released through respiration. In order to investigate how these changes may influence the efficacy of the Arctic Ocean as a carbon sink, we calculated the gross oxygen production (GOP), which is the rate of total photosynthesis, and the net community production (NCP), which is the rate of photosynthesis minus community respiration and thus represents the strength of the carbon sink. The chemical gas tracers, triple oxygen isotopes and O2/Ar ratios, as measured in samples from the surface waters of the Beaufort Gyre region of the Canada Basin, were used to quantify gross oxygen production and net community production, respectively, in late summer and early fall over six years (2011-2016). We examined the effects of location, ice cover, chlorophyll-a, season, and more to better understand the collective impact of these physical conditions on biological productivity rates. Over these six years, mean GOP rates ranged from 9.1 ± 1 mmol O2 m⁻² d⁻¹ to 40 ± 4 mmol O2 m⁻²d⁻¹ and mean NCP rates ranged from 1.1 ± 0.2 mmol O2 m⁻² d⁻¹ to 2.5 ± 0.2 mmol O2 m⁻² d⁻¹. Analyzing inter-annual variations in these rates can enlighten our understanding of how dramatic changes in the global climate may impact the ability of this region in the Arctic Ocean to remove carbon dioxide from the atmosphere. Other/Unknown Material Arctic Arctic Ocean canada basin Sea ice Wellesley College Digital Scholarship and Archive Arctic Arctic Ocean Canada |
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Open Polar |
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Wellesley College Digital Scholarship and Archive |
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description |
Oceans account for more than 25% of anthropogenic CO2 removal from the atmosphere. Changes in our global climate have affected the Arctic Ocean in particular, resulting in increasing rates of warming and record-low sea ice extent, which for example, in the summer of 2012, was only half of the average over the previous three decades. It is unclear how these changes in the Arctic Ocean may affect biological productivity, which is one of the main drivers of the oceanic carbon cycle as CO2is consumed through photosynthesis and released through respiration. In order to investigate how these changes may influence the efficacy of the Arctic Ocean as a carbon sink, we calculated the gross oxygen production (GOP), which is the rate of total photosynthesis, and the net community production (NCP), which is the rate of photosynthesis minus community respiration and thus represents the strength of the carbon sink. The chemical gas tracers, triple oxygen isotopes and O2/Ar ratios, as measured in samples from the surface waters of the Beaufort Gyre region of the Canada Basin, were used to quantify gross oxygen production and net community production, respectively, in late summer and early fall over six years (2011-2016). We examined the effects of location, ice cover, chlorophyll-a, season, and more to better understand the collective impact of these physical conditions on biological productivity rates. Over these six years, mean GOP rates ranged from 9.1 ± 1 mmol O2 m⁻² d⁻¹ to 40 ± 4 mmol O2 m⁻²d⁻¹ and mean NCP rates ranged from 1.1 ± 0.2 mmol O2 m⁻² d⁻¹ to 2.5 ± 0.2 mmol O2 m⁻² d⁻¹. Analyzing inter-annual variations in these rates can enlighten our understanding of how dramatic changes in the global climate may impact the ability of this region in the Arctic Ocean to remove carbon dioxide from the atmosphere. |
author2 |
Ji, Brenda Y (author) Biological Sciences (department) |
format |
Other/Unknown Material |
title |
Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean |
spellingShingle |
Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean |
title_short |
Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean |
title_full |
Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean |
title_fullStr |
Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean |
title_full_unstemmed |
Towards understanding the variability between rates of biological productivity in the Beaufort Gyre of the Arctic Ocean |
title_sort |
towards understanding the variability between rates of biological productivity in the beaufort gyre of the arctic ocean |
publishDate |
2018 |
url |
https://repository.wellesley.edu/islandora/object/ir%3A852/datastream/TN/view/Towards%20understanding%20the%20variability%20between%20rates%20of%20biological%20productivity%20in%20the%20Beaufort%20Gyre%20of%20the%20Arctic%20Ocean.jpg |
geographic |
Arctic Arctic Ocean Canada |
geographic_facet |
Arctic Arctic Ocean Canada |
genre |
Arctic Arctic Ocean canada basin Sea ice |
genre_facet |
Arctic Arctic Ocean canada basin Sea ice |
op_relation |
ir:852 local: WCTC_2018_JiBrendaY_Towardsunderstanding thesiscollection:584 https://repository.wellesley.edu/islandora/object/ir%3A852/datastream/TN/view/Towards%20understanding%20the%20variability%20between%20rates%20of%20biological%20productivity%20in%20the%20Beaufort%20Gyre%20of%20the%20Arctic%20Ocean.jpg |
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