Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods
In-situ net community production (NCP) was measured on nine cruises along Line P in the subarctic Northeast Pacific during 2007-2009 and incubation based new, regenerated and carbon production on four cruises starting in August 2008. In-situ NCP, determined using the O2/Ar gas ratio in the mixed lay...
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ftuvicpubl:oai:dspace.library.uvic.ca:1828/5014 2023-05-15T18:28:12+02:00 Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods Giesbrecht, Karina Hamme, Roberta Claire 2010 application/pdf http://hdl.handle.net/1828/5014 English en eng http://hdl.handle.net/1828/5014 Available to the World Wide Web NCP subarctic euphotic zone Thesis 2010 ftuvicpubl 2022-05-19T06:13:33Z In-situ net community production (NCP) was measured on nine cruises along Line P in the subarctic Northeast Pacific during 2007-2009 and incubation based new, regenerated and carbon production on four cruises starting in August 2008. In-situ NCP, determined using the O2/Ar gas ratio in the mixed layer, averaged 18.4±5.1 mmol O2 m-2 d-1 for stations west of 130°W in June and August. In-situ NCP was nearly equivalent to 24-h 15NO3 - based euphotic zone integrated new production (New-P) with an average NCP: New-P ratio of 1.3±0.4 that was consistent over a range of environmental conditions. The relationship between NCP and 24-h 13C integrated production (C-PP) was variable, but with a consistent mean NCP:C-PP ratio of 0.42±0.27 even when historical measurements were included in the comparison. Two offshore high productivity events were observed in the HNLC region of Line P, one centered between 134°W and 139°W and the other west of 130°W. Only one high productivity event shows conclusive evidence of being caused by iron deposition. Graduate 0416 Thesis Subarctic University of Victoria (Canada): UVicDSpace Pacific |
institution |
Open Polar |
collection |
University of Victoria (Canada): UVicDSpace |
op_collection_id |
ftuvicpubl |
language |
English |
topic |
NCP subarctic euphotic zone |
spellingShingle |
NCP subarctic euphotic zone Giesbrecht, Karina Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods |
topic_facet |
NCP subarctic euphotic zone |
description |
In-situ net community production (NCP) was measured on nine cruises along Line P in the subarctic Northeast Pacific during 2007-2009 and incubation based new, regenerated and carbon production on four cruises starting in August 2008. In-situ NCP, determined using the O2/Ar gas ratio in the mixed layer, averaged 18.4±5.1 mmol O2 m-2 d-1 for stations west of 130°W in June and August. In-situ NCP was nearly equivalent to 24-h 15NO3 - based euphotic zone integrated new production (New-P) with an average NCP: New-P ratio of 1.3±0.4 that was consistent over a range of environmental conditions. The relationship between NCP and 24-h 13C integrated production (C-PP) was variable, but with a consistent mean NCP:C-PP ratio of 0.42±0.27 even when historical measurements were included in the comparison. Two offshore high productivity events were observed in the HNLC region of Line P, one centered between 134°W and 139°W and the other west of 130°W. Only one high productivity event shows conclusive evidence of being caused by iron deposition. Graduate 0416 |
author2 |
Hamme, Roberta Claire |
format |
Thesis |
author |
Giesbrecht, Karina |
author_facet |
Giesbrecht, Karina |
author_sort |
Giesbrecht, Karina |
title |
Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods |
title_short |
Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods |
title_full |
Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods |
title_fullStr |
Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods |
title_full_unstemmed |
Biological Productivity in the Northeast Pacific: Comparing an in-situ method with incubation based methods |
title_sort |
biological productivity in the northeast pacific: comparing an in-situ method with incubation based methods |
publishDate |
2010 |
url |
http://hdl.handle.net/1828/5014 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
http://hdl.handle.net/1828/5014 |
op_rights |
Available to the World Wide Web |
_version_ |
1766210573764132864 |