Southern Ocean Iron Experiment (SOFex)
The Southern Ocean Iron Experiment (SOFeX) was an experiment decades in the planning. It's implementation was among the most complex ship operations that SIO has been involved in. The SOFeX field expedition was successful in creating and tracking two experimentally enriched areas of the Souther...
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ftosti:oai:osti.gov:841814 2023-07-30T04:06:57+02:00 Southern Ocean Iron Experiment (SOFex) Coale, Kenneth H. 2008-02-05 application/pdf http://www.osti.gov/servlets/purl/841814 https://www.osti.gov/biblio/841814 unknown http://www.osti.gov/servlets/purl/841814 https://www.osti.gov/biblio/841814 01 COAL LIGNITE AND PEAT 42 ENGINEERING 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 60 APPLIED LIFE SCIENCES AVAILABILITY CARBON CARBON DIOXIDE EXPORTS IMPLEMENTATION IRON NITRATES NITROGEN PHYTOPLANKTON PLANNING PRODUCTIVITY SILICIC ACID SIMULATION TRANSPORT 2008 ftosti 2023-07-11T08:40:43Z The Southern Ocean Iron Experiment (SOFeX) was an experiment decades in the planning. It's implementation was among the most complex ship operations that SIO has been involved in. The SOFeX field expedition was successful in creating and tracking two experimentally enriched areas of the Southern Ocean, one characterized by low silicic acid, one characterized by high silicic acid. Both experimental sites were replete with abundant nitrate. About 100 scientists were involved overall. The major findings of this study were significant in several ways: (1) The productivity of the southern ocean is limited by iron availability. (2) Carbon uptake and flux is therefore controlled by iron availability (3) In spite of low silicic acid, iron promotes non-silicious phytoplankton growth and the uptake of carbon dioxide. (4) The transport of fixed carbon from the surface layers proceeds with a C:N ratio that would indicate differential remineralization of nitrogen at shallow depths. (5) These finding have major implications for modeling of carbon export based on nitrate utilization. (6) The general results of the experiment indicate that, beyond other southern ocean enrichment experiments, iron inputs have a much wider impact of productivity and carbon cycling than previously demonstrated. Scientific presentations: Coale, K., Johnson, K, Buesseler, K., 2002. The SOFeX Group. Eos. Trans. AGU 83(47) OS11A-0199. Coale, K., Johnson, K. Buesseler, K., 2002. SOFeX: Southern Ocean Iron Experiments. Overview and Experimental Design. Eos. Trans. AGU 83 (47) OS22D-01. Buesseler, K.,et al. 2002. Does Iron Fertilization Enhance Carbon Sequestration? Particle flux results from the Southern Ocean Iron Experiment. Eos. Trans. AGU 83 (47), OS22D-09. Johnson, K. et al. 2002. Open Ocean Iron Fertilization Experiments From IronEx-I through SOFeX: What We Know and What We Still Need to Understand. Eos. Trans. AGU 83 (47), OS22D-12. Coale, K. H., 2003. Carbon and Nutrient Cycling During the Southern Ocean Iron Enrichment Experiments. Seattle, WA. ... Other/Unknown Material Southern Ocean SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Southern Ocean |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
01 COAL LIGNITE AND PEAT 42 ENGINEERING 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 60 APPLIED LIFE SCIENCES AVAILABILITY CARBON CARBON DIOXIDE EXPORTS IMPLEMENTATION IRON NITRATES NITROGEN PHYTOPLANKTON PLANNING PRODUCTIVITY SILICIC ACID SIMULATION TRANSPORT |
spellingShingle |
01 COAL LIGNITE AND PEAT 42 ENGINEERING 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 60 APPLIED LIFE SCIENCES AVAILABILITY CARBON CARBON DIOXIDE EXPORTS IMPLEMENTATION IRON NITRATES NITROGEN PHYTOPLANKTON PLANNING PRODUCTIVITY SILICIC ACID SIMULATION TRANSPORT Coale, Kenneth H. Southern Ocean Iron Experiment (SOFex) |
topic_facet |
01 COAL LIGNITE AND PEAT 42 ENGINEERING 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 60 APPLIED LIFE SCIENCES AVAILABILITY CARBON CARBON DIOXIDE EXPORTS IMPLEMENTATION IRON NITRATES NITROGEN PHYTOPLANKTON PLANNING PRODUCTIVITY SILICIC ACID SIMULATION TRANSPORT |
description |
The Southern Ocean Iron Experiment (SOFeX) was an experiment decades in the planning. It's implementation was among the most complex ship operations that SIO has been involved in. The SOFeX field expedition was successful in creating and tracking two experimentally enriched areas of the Southern Ocean, one characterized by low silicic acid, one characterized by high silicic acid. Both experimental sites were replete with abundant nitrate. About 100 scientists were involved overall. The major findings of this study were significant in several ways: (1) The productivity of the southern ocean is limited by iron availability. (2) Carbon uptake and flux is therefore controlled by iron availability (3) In spite of low silicic acid, iron promotes non-silicious phytoplankton growth and the uptake of carbon dioxide. (4) The transport of fixed carbon from the surface layers proceeds with a C:N ratio that would indicate differential remineralization of nitrogen at shallow depths. (5) These finding have major implications for modeling of carbon export based on nitrate utilization. (6) The general results of the experiment indicate that, beyond other southern ocean enrichment experiments, iron inputs have a much wider impact of productivity and carbon cycling than previously demonstrated. Scientific presentations: Coale, K., Johnson, K, Buesseler, K., 2002. The SOFeX Group. Eos. Trans. AGU 83(47) OS11A-0199. Coale, K., Johnson, K. Buesseler, K., 2002. SOFeX: Southern Ocean Iron Experiments. Overview and Experimental Design. Eos. Trans. AGU 83 (47) OS22D-01. Buesseler, K.,et al. 2002. Does Iron Fertilization Enhance Carbon Sequestration? Particle flux results from the Southern Ocean Iron Experiment. Eos. Trans. AGU 83 (47), OS22D-09. Johnson, K. et al. 2002. Open Ocean Iron Fertilization Experiments From IronEx-I through SOFeX: What We Know and What We Still Need to Understand. Eos. Trans. AGU 83 (47), OS22D-12. Coale, K. H., 2003. Carbon and Nutrient Cycling During the Southern Ocean Iron Enrichment Experiments. Seattle, WA. ... |
author |
Coale, Kenneth H. |
author_facet |
Coale, Kenneth H. |
author_sort |
Coale, Kenneth H. |
title |
Southern Ocean Iron Experiment (SOFex) |
title_short |
Southern Ocean Iron Experiment (SOFex) |
title_full |
Southern Ocean Iron Experiment (SOFex) |
title_fullStr |
Southern Ocean Iron Experiment (SOFex) |
title_full_unstemmed |
Southern Ocean Iron Experiment (SOFex) |
title_sort |
southern ocean iron experiment (sofex) |
publishDate |
2008 |
url |
http://www.osti.gov/servlets/purl/841814 https://www.osti.gov/biblio/841814 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://www.osti.gov/servlets/purl/841814 https://www.osti.gov/biblio/841814 |
_version_ |
1772819961879724032 |