Campaña: D319

Objectives: To quantify marine halocarbon emission variability and latitudinal variation, characterise in situ open ocean atmospheric reactive iodine latitudinal variability and characterise oxidative chemistry perturbation due to oceanic emission of halogens from the Mauritanian upwelling region.

Rationale: Transecting from the UK through Biscay, south past the west coast of Africa, through the Mauritanian upwelling, to pass Cape Verde simultaneous to the intensive deployment at the UK SOLAS Observatory on Sao Vicente, the measurements made on Discovery cruise D319 are intended to provide a detailed latitudinal characterisation of marine atmospheric halogen chemistry. This will feed validation and constraint data to regional and global models in projects linked to RHaMBLe. In addition the cruise will address a number of key scientific questions required to determine the global importance of iodine chemistry and to further our understanding of the controls of halogen chemistry in the remote ocean:

i) How heterogeneous are the direct halogen sources and on what scale is the heterogeneity - does the upwelling region produce more or less halogens than the 'background' region?

ii) What are the relative contributions of I atoms to the remote MBL from I2 and organic iodine?

iii) Is sufficient iodine released to the remote MBL to sustain aerosol nucleation or to significantly affect the ozone budget and free radical populations?

Measurement Description: Measured species included a variety of halocarbons in both water column and atmosphere and atmospheric boundary layer measurements of I2, OIO and IO by Broadband Cavity Enhanced Absorption Spectroscopy (BBCEAS). A compact version of the FAGE system, developed for the FAAM BAe-146, was deployed to provide measurements of IO or OH / HO2, permitting direct assessment of RHS-induced changes in the oxidising environment through the upwelling region. A range of trace gas monitors was simultaneously deployed to measure O3 and NOx. Aerosol number and size distribution measurements from 3 nm to 20 micron diameter were also made by a range of mobility (SMPS) and optical instrumentation, (OPC and FSSP). Additional aerosol measurements were provided as part of the NERC-funded ACMME project (PI Allan). Measurements of pigments in the surface waters were made by HPLC.

Prevailing meteorological conditions were used to direct the cruise in terms of geographical positioning and measurement interpretation, e.g.

i) exploitation of any broad flow connection between Cape Verde and the ship to interpret measurements as process studies and

ii) identification of in- and out-of-plume conditions to contrast chemistry influenced and uninfluenced by emissions from the upwelling region.

 

. Campaña: D319. http://datos.ieo.es/geonetwork/srv/api/records/urn:SDN:CSR:LOCAL:SI29200705190
 

INSPIRE

Identificación

Identificador del fichero
urn:SDN:CSR:LOCAL:SI29200705190   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:8259
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 )
  • 110
  • 145
  • 146
  • 38
  • 39
  • 74
  • 75
SeaDataNet Ports Gazetteer ( departure_place )
  • Lisbon
SeaDataNet Ports Gazetteer ( arrival_place )
  • Falmouth
International Standards Organisation countries ( departure_country )
  • Portugal
International Standards Organisation countries ( arrival_country )
  • United Kingdom
ICES Platform Codes ( platform )
  • Discovery
SeaVoX Platform Categories ( platform_class )
  • research vessel
SeaVoX salt and fresh water body gazetteer ( Lugar )
  • Northeast Atlantic Ocean (40W)
Other keywords
 
 

Cobertura geográfica

N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


N
S
E
W


 

Temporal reference

Extensión tempora
Inicio
2007-05-19T00:00:00Z
Fin
2007-06-11T00:00:00Z
Extensión tempora
Fecha ( Creación )
2007-06-11
 

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 Manchester School of Earth, Atmospheric and Environmental Sciences
Email
earth.support@manchester.ac.uk
 

Responsible organization (s)

Contacto para el recurso
Nombre de la organización
University of Manchester School of Earth, Atmospheric and Environmental Sciences
Email
earth.support@manchester.ac.uk
 

Metadata information

Contacto para el metadato
Nombre de la organización
Instituto Español de Oceanografía
Email
N/A
Fecha
2021-11-28
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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