The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX)
To better understand the role of iron in driving marine ecosystems, the Southern Ocean Iron Experiment (SOFeX) fertilized two surface water patches with iron north and south of the Antarctic Polar Front Zone (APFZ). Using 1-D coupled biological-physical simulations, we examine the biogeochemical dyn...
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Language: | English |
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ftcdlib:qt9zb0c589 2023-05-15T13:58:54+02:00 The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX) Krishnamurthy, A Moore, JK Doney, SC 112 - 130 2008-05-01 application/pdf http://www.escholarship.org/uc/item/9zb0c589 english eng eScholarship, University of California qt9zb0c589 http://www.escholarship.org/uc/item/9zb0c589 Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Krishnamurthy, A; Moore, JK; & Doney, SC. (2008). The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX). Journal of Marine Systems, 71(1-2), 112 - 130. doi:10.1016/j.jmarsys.2007.07.002. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/9zb0c589 article 2008 ftcdlib https://doi.org/10.1016/j.jmarsys.2007.07.002 2017-10-13T22:51:29Z To better understand the role of iron in driving marine ecosystems, the Southern Ocean Iron Experiment (SOFeX) fertilized two surface water patches with iron north and south of the Antarctic Polar Front Zone (APFZ). Using 1-D coupled biological-physical simulations, we examine the biogeochemical dynamics that occurred both inside and outside of the fertilized patches during and shortly after the SOFeX field campaign. We focus, in particular, on three main issues governing the biological response to deliberate iron fertilization: the interaction among phytoplankton, light, macronutrient and iron limitation; dilution and lateral mixing between the fertilized patch and external, unfertilized waters; and the effect of varying mixed layer depth on the light field. At the patch south of the APFZ, sensitivity simulations with no dilution results in the maximum bloom magnitude, whereas dilution with external water extends the development of the north patch bloom by relieving silicon limitation. In model sensitivity studies for both sites, maximum chlorophyll concentration and dissolved inorganic carbon depletion inside the fertilized patches are inversely related to mixed layer depth, similar to the patterns observed across a number of iron fertilization field experiments. Our results suggest that Southern Ocean phytoplankton blooms resulting from natural or deliberate iron fertilization will tend to become iron-light co-limited unless the mixed layer depth is quite shallow. © 2007 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of California: eScholarship Antarctic Southern Ocean The Antarctic Journal of Marine Systems 71 1-2 112 130 |
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University of California: eScholarship |
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ftcdlib |
language |
English |
description |
To better understand the role of iron in driving marine ecosystems, the Southern Ocean Iron Experiment (SOFeX) fertilized two surface water patches with iron north and south of the Antarctic Polar Front Zone (APFZ). Using 1-D coupled biological-physical simulations, we examine the biogeochemical dynamics that occurred both inside and outside of the fertilized patches during and shortly after the SOFeX field campaign. We focus, in particular, on three main issues governing the biological response to deliberate iron fertilization: the interaction among phytoplankton, light, macronutrient and iron limitation; dilution and lateral mixing between the fertilized patch and external, unfertilized waters; and the effect of varying mixed layer depth on the light field. At the patch south of the APFZ, sensitivity simulations with no dilution results in the maximum bloom magnitude, whereas dilution with external water extends the development of the north patch bloom by relieving silicon limitation. In model sensitivity studies for both sites, maximum chlorophyll concentration and dissolved inorganic carbon depletion inside the fertilized patches are inversely related to mixed layer depth, similar to the patterns observed across a number of iron fertilization field experiments. Our results suggest that Southern Ocean phytoplankton blooms resulting from natural or deliberate iron fertilization will tend to become iron-light co-limited unless the mixed layer depth is quite shallow. © 2007 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Krishnamurthy, A Moore, JK Doney, SC |
spellingShingle |
Krishnamurthy, A Moore, JK Doney, SC The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX) |
author_facet |
Krishnamurthy, A Moore, JK Doney, SC |
author_sort |
Krishnamurthy, A |
title |
The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX) |
title_short |
The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX) |
title_full |
The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX) |
title_fullStr |
The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX) |
title_full_unstemmed |
The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX) |
title_sort |
effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-d simulations of the southern ocean iron experiment (sofex) |
publisher |
eScholarship, University of California |
publishDate |
2008 |
url |
http://www.escholarship.org/uc/item/9zb0c589 |
op_coverage |
112 - 130 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Krishnamurthy, A; Moore, JK; & Doney, SC. (2008). The effects of dilution and mixed layer depth on deliberate ocean iron fertilization: 1-D simulations of the southern ocean iron experiment (SOFeX). Journal of Marine Systems, 71(1-2), 112 - 130. doi:10.1016/j.jmarsys.2007.07.002. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/9zb0c589 |
op_relation |
qt9zb0c589 http://www.escholarship.org/uc/item/9zb0c589 |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.jmarsys.2007.07.002 |
container_title |
Journal of Marine Systems |
container_volume |
71 |
container_issue |
1-2 |
container_start_page |
112 |
op_container_end_page |
130 |
_version_ |
1766267259776401408 |