Examining links between dust deposition and phytoplankton response using ice cores
Dust is a major source of nutrients to remote ocean environments, influencing primary productivity (PP). Enhanced oceanic PP causes drawdown of atmospheric CO2 and is considered likely to be a driver of climate variability on glacial-interglacial timeframes. However, the scale of this relationship a...
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ftunivwollongong:oai:ro.uow.edu.au:smhpapers1-1390 2023-05-15T18:21:29+02:00 Examining links between dust deposition and phytoplankton response using ice cores Hooper, James Mayewski, Paul A Marx, Samuel K Henson, Stephanie Potocki, Mariusz Sneed, Sharon Handley, Mike Gasso, Santiago Fischer, Matthew Saunders, Krystyna M 2019-01-01T08:00:00Z https://ro.uow.edu.au/smhpapers1/383 unknown Research Online https://ro.uow.edu.au/smhpapers1/383 Faculty of Science, Medicine and Health - Papers: Part B article 2019 ftunivwollongong 2021-08-23T22:24:51Z Dust is a major source of nutrients to remote ocean environments, influencing primary productivity (PP). Enhanced oceanic PP causes drawdown of atmospheric CO2 and is considered likely to be a driver of climate variability on glacial-interglacial timeframes. However, the scale of this relationship and its operation over shorter timescales remains uncertain, while it is unclear whether dust fertilisation, or other mechanisms, e.g. nutrient upwelling, are the primary driver of PP in high-nutrient low-chlorophyll (HNLC) ocean regions. In this study, we demonstrate, using dust derived Fe and Methanesulfonic acid (a measure of ocean PP) deposition in ice cores from the South Atlantic (South Georgia Island) and North Pacific (Yukon), that PP is significantly correlated with Dust-Fe on both an event and annual scale. However, measuring the relationship between (dust) Fe fertilization and PP in high resolution ice cores is subject to a number of highly complex factors, which are discussed and together used to recommend future research directions. In conclusion, our research suggests that changes in aeolian Fe flux, due to climate change and human activity in dust source regions, could have significant implications for HNLC ocean PP and, therefore potentially, carbon sequestration. Article in Journal/Newspaper South Georgia Island Yukon University of Wollongong, Australia: Research Online Pacific South Georgia Island ENVELOPE(-36.750,-36.750,-54.250,-54.250) Yukon |
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Open Polar |
collection |
University of Wollongong, Australia: Research Online |
op_collection_id |
ftunivwollongong |
language |
unknown |
description |
Dust is a major source of nutrients to remote ocean environments, influencing primary productivity (PP). Enhanced oceanic PP causes drawdown of atmospheric CO2 and is considered likely to be a driver of climate variability on glacial-interglacial timeframes. However, the scale of this relationship and its operation over shorter timescales remains uncertain, while it is unclear whether dust fertilisation, or other mechanisms, e.g. nutrient upwelling, are the primary driver of PP in high-nutrient low-chlorophyll (HNLC) ocean regions. In this study, we demonstrate, using dust derived Fe and Methanesulfonic acid (a measure of ocean PP) deposition in ice cores from the South Atlantic (South Georgia Island) and North Pacific (Yukon), that PP is significantly correlated with Dust-Fe on both an event and annual scale. However, measuring the relationship between (dust) Fe fertilization and PP in high resolution ice cores is subject to a number of highly complex factors, which are discussed and together used to recommend future research directions. In conclusion, our research suggests that changes in aeolian Fe flux, due to climate change and human activity in dust source regions, could have significant implications for HNLC ocean PP and, therefore potentially, carbon sequestration. |
format |
Article in Journal/Newspaper |
author |
Hooper, James Mayewski, Paul A Marx, Samuel K Henson, Stephanie Potocki, Mariusz Sneed, Sharon Handley, Mike Gasso, Santiago Fischer, Matthew Saunders, Krystyna M |
spellingShingle |
Hooper, James Mayewski, Paul A Marx, Samuel K Henson, Stephanie Potocki, Mariusz Sneed, Sharon Handley, Mike Gasso, Santiago Fischer, Matthew Saunders, Krystyna M Examining links between dust deposition and phytoplankton response using ice cores |
author_facet |
Hooper, James Mayewski, Paul A Marx, Samuel K Henson, Stephanie Potocki, Mariusz Sneed, Sharon Handley, Mike Gasso, Santiago Fischer, Matthew Saunders, Krystyna M |
author_sort |
Hooper, James |
title |
Examining links between dust deposition and phytoplankton response using ice cores |
title_short |
Examining links between dust deposition and phytoplankton response using ice cores |
title_full |
Examining links between dust deposition and phytoplankton response using ice cores |
title_fullStr |
Examining links between dust deposition and phytoplankton response using ice cores |
title_full_unstemmed |
Examining links between dust deposition and phytoplankton response using ice cores |
title_sort |
examining links between dust deposition and phytoplankton response using ice cores |
publisher |
Research Online |
publishDate |
2019 |
url |
https://ro.uow.edu.au/smhpapers1/383 |
long_lat |
ENVELOPE(-36.750,-36.750,-54.250,-54.250) |
geographic |
Pacific South Georgia Island Yukon |
geographic_facet |
Pacific South Georgia Island Yukon |
genre |
South Georgia Island Yukon |
genre_facet |
South Georgia Island Yukon |
op_source |
Faculty of Science, Medicine and Health - Papers: Part B |
op_relation |
https://ro.uow.edu.au/smhpapers1/383 |
_version_ |
1766200786020204544 |