Ocean deoxygenation, a paleo-proxy perspective ...
The oceans are losing oxygen because of global warming and the consequences of this ocean deoxygenation are far reaching, particularly for aerobic marine organisms that depend on dissolved oxygen to live. Furthermore, in oxygen-deficient waters, ocean deoxygenation promotes global warming through th...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23239379 https://figshare.utas.edu.au/articles/thesis/Ocean_deoxygenation_a_paleo-proxy_perspective/23239379 |
| Summary: | The oceans are losing oxygen because of global warming and the consequences of this ocean deoxygenation are far reaching, particularly for aerobic marine organisms that depend on dissolved oxygen to live. Furthermore, in oxygen-deficient waters, ocean deoxygenation promotes global warming through the microbial production of nitrous oxide, a powerful greenhouse gas. The study of the Southern Ocean deoxygenation is particularly essential because through global circulation, it supplies dissolved oxygen to all ocean basins. Moreover, this region is particularly affected by deoxygenation and accounts for one quarter of the total oxygen losses observed since 1970. However, future oxygenation trends remain unclear. To help forecast future Southern Ocean deoxygenation accurately, a precise knowledge of historical oxygen trends and their drivers is essential. One way to do this is to use sediments which record and preserve changes in the water column above them and offer a window on past conditions in the oceans. In ... |
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