Campaña: D361

The cruise D361 forms part of a study entitled 'Physical and chemical forcing of diazotrophy in the (sub)-tropical Atlantic Ocean'. The study is investigating the potential influence of iron and phosphorus availability on nitrogen fixation in regions of the tropical Atlantic Ocean. The cruise also undertakes deep trace metal clean CTD casts as part of the International GEOTRACES programme. The purpose of the cruise therefore is to undertake measurements of dissolved and particulate iron and phosporpus availability, their spatial and temporal variations, and their impact on diazotrophy in the surface ocean.

Aim: To quantify the supply and determine the biogeochemical cycling of Fe and other nutrients, and relate this to N2 fixation, diazotroph species distribution and N* fields.

1. Quantify the distribution of nutrients and trace metals: Quantify surface water and water column distributions of dissolved inorganic/organic N, P, Fe, and DAl, DMn and particulate P, N, Fe, Al, Mn.

2. Quantify the rate of Fe, Al, Mn, P and N supply to surface waters: Assess the source fluxes of the key elements for diazotrophs and source tracers to the surface ocean from atmospheric deposition and internal transport via diapycnal mixing and lateral advection.

3. Identify the source of subsurface Fe enrichment: Identify whether Fe-rich subsurface waters of the tropical North Atlantic thermocline originate from the atmosphere or the shelf using Fe distributions and Al, Mn, and O2 source tracers.

4. Quantify the diazotrophic response to Fe, phosphate, DOP supply: Relate the spatial distributions of inorganic Fe and organically complexed Fe, and phosphate and DOP to diazotrophy. The specific uptake of Fe, phosphate and DOP by the whole microbial community and Trichodesmium will be assessed by shipboard incubations, radiotracer techniques and enzyme bioassays. In addition, we will identify the connection between N2 fixation rates and diazotroph community structure, by comparing size fractionated 15N2-derived rates of N2 fixation (Fig. 1) with abundance and diversity of diazotrophs using nifH phylogeny.

Objective 5: Investigate how the large scale transport pathways of Fe and P influence the N* distribution: Use fine-scale isopycnic model to reveal the large-scale transport pathways of Fe and P in the (S)-T Atlantic, and their effect on the N* distribution.

 

. Campaña: D361. http://datos.ieo.es/geonetwork/srv/api/records/urn:SDN:CSR:LOCAL:SI29201102070
 

INSPIRE

Identificación

Identificador del fichero
urn:SDN:CSR:LOCAL:SI29201102070   XML
Jerarquía
Campaña/Survey Campañas
Recurso en línea
resource_protocol
WWW:LINK-1.0-http--related
resource_protocol
WWW:LINK-1.0-http--related
Identificador del recurso
code
urn:SDN:CSR:LOCAL:10570
Idioma del metadato
Spanish; Castilian
Codificacióin
Formato
XML
Versión
1
Proyección
code
World Geodetic System 84
 

Classification of data and services

Categoría temática
  • Océanos
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Palabras clave

GEMET - INSPIRE themes, version 1.0 ( Tema )
  • Oceanographic geographical features
Ten-degree Marsden Squares ( marsden_square )
  • 38
  • 39
  • 181
  • 182
  • 110
  • 111
  • 3
  • 301
  • 4
  • 302
  • 40
  • 75
  • 76
SeaDataNet Ports Gazetteer ( departure_place )
  • Santa Cruz de Tenerife
SeaDataNet Ports Gazetteer ( arrival_place )
  • Santa Cruz de Tenerife
International Standards Organisation countries ( departure_country )
  • Spain
International Standards Organisation countries ( arrival_country )
  • Spain
ICES Platform Codes ( platform )
  • Discovery
SeaVoX Platform Categories ( platform_class )
  • research vessel
SeaVoX salt and fresh water body gazetteer ( Lugar )
  • South Atlantic Ocean
SeaVoX salt and fresh water body gazetteer ( Lugar )
  • Northeast Atlantic Ocean (40W)
Other keywords
 
 

Cobertura geográfica

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N
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N
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E
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N
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E
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Temporal reference

Extensión tempora
Inicio
2011-02-07T00:00:00Z
Fin
2011-03-19T00:00:00Z
Extensión tempora
Fecha ( Creación )
2011-03-19
 

Quality and validity

Linaje
El Centro de datos aplica controles de calidad estandarizados a todos los datos de los que es responsable. Contacta con el Centro de datos para más información.
 

Conformidad

Conformidad
Conformidad
 

Conformidad

Conformidad
Conformidad
Explicación
See the referenced specification
Explicación
See the referenced specification
 

Restrictions on access and use

Limitación de uso
Not applicable
Restricciones de Acceso
Restricciones de Acceso
 

Restrictions on access and use

 

Responsible organization (s)

Contacto para el recurso
Nombre de la organización
University of Southampton School of Ocean and Earth Science
Email
soes@noc.soton.ac.uk
 

Responsible organization (s)

Contacto para el recurso
Nombre de la organización
University of Southampton School of Ocean and Earth Science
Email
soes@noc.soton.ac.uk
 

Metadata information

Contacto para el metadato
Nombre de la organización
Instituto Español de Oceanografía
Email
N/A
Fecha
2021-11-29
Idioma del metadato
Spanish; Castilian
Codificación
utf8 UTF8
 
 

SDS

Conformance class 1: invocable

Access Point URL
Endpoint URL
Technical specification
 

Conformance class 2: interoperable

Coordinate reference system
 
Quality of Service
 
Restricciones de Acceso
Limitation
 
Use constraints
Limitation
 
Responsible custodian
Contacto para el recurso
 
 

Conformance class 3: harmonized

 
 

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