The TP* Conveyor
Given the elevated energetic costs of biological N2 fixation, marine diazotrophs may out-compete non-fixing phytoplankton only in N poor regions. This paradigm is apparently in contrast with the observation of high N2 fixation rates in the subtropical North Atlantic where vertical nutrient fluxes to...
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ftoceanrep:oai:oceanrep.geomar.de:13976 2023-05-15T17:28:58+02:00 The TP* Conveyor Landolfi, Angela Koeve, Wolfgang Dietze, Heiner Oschlies, Andreas 2012 https://oceanrep.geomar.de/id/eprint/13976/ unknown Landolfi, A. , Koeve, W. , Dietze, H. and Oschlies, A. (2012) The TP* Conveyor. [Poster] In: Ocean Sciences Meeting 2012 . , 20.-24.02.2012, Salt Lake City, USA . Conference or Workshop Item NonPeerReviewed 2012 ftoceanrep 2023-04-07T15:03:20Z Given the elevated energetic costs of biological N2 fixation, marine diazotrophs may out-compete non-fixing phytoplankton only in N poor regions. This paradigm is apparently in contrast with the observation of high N2 fixation rates in the subtropical North Atlantic where vertical nutrient fluxes to the euphotic zone are high in nitrate relative to phosphate, exceeding the needs of non-fixing phytoplankton. A mechanism potentially resolving this apparent paradox is the transport of accumulated excess inorganic (PO4) and organic (DOP) phosphorus, TP*, from distant regions of its formation to the North Atlantic subtropical gyre. In this contribution we explore the sensitivity of TP* accumulation to environmental factors and the potential TP* transport pathways using a state - of - the - art global coupled biogeochemical ocean model. Understanding the controls on marine N2 fixation is of fundamental importance to interpret past and predict future changes of the marine N inventory. Conference Object North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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Given the elevated energetic costs of biological N2 fixation, marine diazotrophs may out-compete non-fixing phytoplankton only in N poor regions. This paradigm is apparently in contrast with the observation of high N2 fixation rates in the subtropical North Atlantic where vertical nutrient fluxes to the euphotic zone are high in nitrate relative to phosphate, exceeding the needs of non-fixing phytoplankton. A mechanism potentially resolving this apparent paradox is the transport of accumulated excess inorganic (PO4) and organic (DOP) phosphorus, TP*, from distant regions of its formation to the North Atlantic subtropical gyre. In this contribution we explore the sensitivity of TP* accumulation to environmental factors and the potential TP* transport pathways using a state - of - the - art global coupled biogeochemical ocean model. Understanding the controls on marine N2 fixation is of fundamental importance to interpret past and predict future changes of the marine N inventory. |
format |
Conference Object |
author |
Landolfi, Angela Koeve, Wolfgang Dietze, Heiner Oschlies, Andreas |
spellingShingle |
Landolfi, Angela Koeve, Wolfgang Dietze, Heiner Oschlies, Andreas The TP* Conveyor |
author_facet |
Landolfi, Angela Koeve, Wolfgang Dietze, Heiner Oschlies, Andreas |
author_sort |
Landolfi, Angela |
title |
The TP* Conveyor |
title_short |
The TP* Conveyor |
title_full |
The TP* Conveyor |
title_fullStr |
The TP* Conveyor |
title_full_unstemmed |
The TP* Conveyor |
title_sort |
tp* conveyor |
publishDate |
2012 |
url |
https://oceanrep.geomar.de/id/eprint/13976/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Landolfi, A. , Koeve, W. , Dietze, H. and Oschlies, A. (2012) The TP* Conveyor. [Poster] In: Ocean Sciences Meeting 2012 . , 20.-24.02.2012, Salt Lake City, USA . |
_version_ |
1766122268604235776 |