The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent
We develop a tool to assist in identifying a link between naturally occurring aeolian dust deposition and phytoplankton response in the ocean. Rather than examining a single, or small number of dust deposition events, we take a climatological approach to estimate the likelihood of observing a defini...
Published in: | Journal of Marine Systems |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2013
|
Subjects: | |
Online Access: | https://espace.library.uq.edu.au/view/UQ:302433 |
id |
ftunivqespace:oai:espace.library.uq.edu.au:UQ:302433 |
---|---|
record_format |
openpolar |
spelling |
ftunivqespace:oai:espace.library.uq.edu.au:UQ:302433 2023-05-15T18:24:52+02:00 The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent Cropp, R. A. Gabric, A. J. Levasseur, M. McTainsh, G. H. Bowie, A. Hassler, C. S. Law, C. S. McGowan, H. Tindale, N. Rossel, R. Viscarra 2013-05-01 https://espace.library.uq.edu.au/view/UQ:302433 eng eng Elsevier doi:10.1016/j.jmarsys.2013.02.013 issn:0924-7963 orcid:0000-0002-2844-2084 Not set Dust-phytoplankton link Aeolian dust Iron limitation Southern Ocean Tasman Sea Great Barrier Reef 1104 Aquatic Science 1105 Ecology Evolution Behavior and Systematics 1910 Oceanography Journal Article 2013 ftunivqespace https://doi.org/10.1016/j.jmarsys.2013.02.013 2020-12-15T00:04:37Z We develop a tool to assist in identifying a link between naturally occurring aeolian dust deposition and phytoplankton response in the ocean. Rather than examining a single, or small number of dust deposition events, we take a climatological approach to estimate the likelihood of observing a definitive link between dust deposition and a phytoplankton bloom for the oceans proximal to the Australian continent. We use a dust storm index (DSI) to determine dust entrainment in the Lake Eyre Basin (LEB) and an ensemble of modelled atmospheric trajectories of dust transport from the basin, the major dust source in Australia. Deposition into the ocean is computed as a function of distance from the LEB source and the local over-ocean precipitation. The upper ocean's receptivity to nutrients, including dust-borne iron, is defined in terms of time-dependent, monthly climatological fields for light, mixed layer depth and chlorophyll concentration relative to the climatological monthly maximum. The resultant likelihood of a dust-phytoplankton link being observed is then mapped as a function of space and time. Our results suggest that the Southern Ocean (north of 45°S), the North West Shelf, and Great Barrier Reef are ocean regions where a rapid biological response to dust inputs is most likely to be observed. Conversely, due to asynchrony between deposition and ocean receptivity, direct causal links appear unlikely to be observed in the Tasman Sea and Southern Ocean south of 45°S. Article in Journal/Newspaper Southern Ocean The University of Queensland: UQ eSpace Southern Ocean Journal of Marine Systems 117-118 43 52 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Dust-phytoplankton link Aeolian dust Iron limitation Southern Ocean Tasman Sea Great Barrier Reef 1104 Aquatic Science 1105 Ecology Evolution Behavior and Systematics 1910 Oceanography |
spellingShingle |
Dust-phytoplankton link Aeolian dust Iron limitation Southern Ocean Tasman Sea Great Barrier Reef 1104 Aquatic Science 1105 Ecology Evolution Behavior and Systematics 1910 Oceanography Cropp, R. A. Gabric, A. J. Levasseur, M. McTainsh, G. H. Bowie, A. Hassler, C. S. Law, C. S. McGowan, H. Tindale, N. Rossel, R. Viscarra The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent |
topic_facet |
Dust-phytoplankton link Aeolian dust Iron limitation Southern Ocean Tasman Sea Great Barrier Reef 1104 Aquatic Science 1105 Ecology Evolution Behavior and Systematics 1910 Oceanography |
description |
We develop a tool to assist in identifying a link between naturally occurring aeolian dust deposition and phytoplankton response in the ocean. Rather than examining a single, or small number of dust deposition events, we take a climatological approach to estimate the likelihood of observing a definitive link between dust deposition and a phytoplankton bloom for the oceans proximal to the Australian continent. We use a dust storm index (DSI) to determine dust entrainment in the Lake Eyre Basin (LEB) and an ensemble of modelled atmospheric trajectories of dust transport from the basin, the major dust source in Australia. Deposition into the ocean is computed as a function of distance from the LEB source and the local over-ocean precipitation. The upper ocean's receptivity to nutrients, including dust-borne iron, is defined in terms of time-dependent, monthly climatological fields for light, mixed layer depth and chlorophyll concentration relative to the climatological monthly maximum. The resultant likelihood of a dust-phytoplankton link being observed is then mapped as a function of space and time. Our results suggest that the Southern Ocean (north of 45°S), the North West Shelf, and Great Barrier Reef are ocean regions where a rapid biological response to dust inputs is most likely to be observed. Conversely, due to asynchrony between deposition and ocean receptivity, direct causal links appear unlikely to be observed in the Tasman Sea and Southern Ocean south of 45°S. |
format |
Article in Journal/Newspaper |
author |
Cropp, R. A. Gabric, A. J. Levasseur, M. McTainsh, G. H. Bowie, A. Hassler, C. S. Law, C. S. McGowan, H. Tindale, N. Rossel, R. Viscarra |
author_facet |
Cropp, R. A. Gabric, A. J. Levasseur, M. McTainsh, G. H. Bowie, A. Hassler, C. S. Law, C. S. McGowan, H. Tindale, N. Rossel, R. Viscarra |
author_sort |
Cropp, R. A. |
title |
The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent |
title_short |
The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent |
title_full |
The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent |
title_fullStr |
The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent |
title_full_unstemmed |
The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent |
title_sort |
likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the australian continent |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://espace.library.uq.edu.au/view/UQ:302433 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
doi:10.1016/j.jmarsys.2013.02.013 issn:0924-7963 orcid:0000-0002-2844-2084 Not set |
op_doi |
https://doi.org/10.1016/j.jmarsys.2013.02.013 |
container_title |
Journal of Marine Systems |
container_volume |
117-118 |
container_start_page |
43 |
op_container_end_page |
52 |
_version_ |
1766205851020820480 |