Mean vertical sections of zonal currents in the Tropical Pacific

Mean subthermocline and intermediate zonal currents meridional sections are produced at several longitudes across the Tropical Pacific, from 18°S to 18°N and 0 to 2000m depth. They are based on a compilation of shipboard ADCP measurements, and absolute geostrophic velocities constructed from a high-resolution 0–2000-m Argo climatology referenced to a 1000-m velocity field derived from Argo float drifts.

Description

1) SADCP data obtained from ships transiting in the low-latitude tropical Pacific, during 1999–2015 (see Cravatte et al., 2017, 190 cruises) are compiled. Most of the data (128 cruises) were provided by the Joint Archive for Shipboard ADCP (JASADCP) at the University of Hawaii, with a large fraction from the NOAA ship Ka’imimoana, servicing the TAO array of moored buoys.

All data retrieved from the JASADCP center were from their ‘‘standard subset’’ containing hourly averages interpolated to a 10-m vertical grid. For the other datasets, SADCP data were provided as 5- to 15-min temporal averages with 5- to 24-m vertical resolution. They were then averaged and interpolated to the 1-h, 10-m vertical grid. The complete dataset was mapped on a 0.25° latitude by 1° longitude grid using a simple Gaussian weighting function with 0.25° latitude and 3° longitude decorrelation scales, independent of the timing of the measurements, with windows of 0.5° of latitude and 6° of longitude.

2) The mean Argo temperature and salinity gridded climatology with a 1/6° resolution (Roemmich and Gilson 2009 was used to compute dynamic height anomalies. Derived zonal geostrophic shear both on and off the equator were computed following the method presented by Picaut and Tournier (1991) using a 1000-m reference level. The 1000-m Argo float drift then provided the constant of integration for vertically integrating the geostrophic shear to obtain a field of mean absolute geostrophic velocity.

 
Citation proposal
Sophie Cravatte (LEGOS, Université de Toulouse, FranceIRD, France) - Elodie Kestenare () (2018) . Mean vertical sections of zonal currents in the Tropical Pacific. https://services.mspdata.eu:/geonetwork/srv/api/records/ee0df940-a26b-4e74-360b-3e7da111a151

Simple

Date ( Publication )
2018-01-01
Identifier
http://dx.doi.org/ / 10.6096/12
Credit
LEGOS, Project LEFE/INSU ZEBRE
Status
Completed Completed

  Author

  Distributor

  Author

  contributor

  contributor

  contributor

GEMET - INSPIRE themes, version 1.0 ( Theme )
  • Oceanographic geographical features
Centre de données ODATIS ( Theme )
  • CDS-IS-OMP
Thèmatiques ODATIS ( Theme )
  • Scientific cruises
Variables ODATIS ( Theme )
  • /Physical Oceanography/Currents
Type de jeux de donnée ODATIS ( Theme )
  • /In-situ observations/Networks , In-situ observations/Sea cruises
Use limitation
Publications using these data should acknowledge the use of the data by citing the DOI and refering the publication Cravatte et al. (2017) : Cravatte, S., E. Kestenare, F. Marin, P. Dutrieux and E. Firing, Subthermocline and Intermediate Zonal Currents in the Tropical Pacific Ocean: paths and vertical structure, J. Phys. Oceanogr. (2017) 47 (9): 2305–2324., https://doi.org/10.1175/JPO-D-17-0043.1
Other constraints
No access conditions apply
Metadata language
English
Topic category
  • Oceans
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S
E
W


N
S
E
W


Reference system identifier
EPSG:4326
Distribution format
  • ASCII ()

  • NetCDF (3 )

OnLine resource
Archive.zip  

Archive.zip

OnLine resource
http://dx.doi.org/10.6096/12  
Hierarchy level
Dataset Dataset

Conformance result

Date ( Publication )
2018-01-01
Explanation
NA
Pass
true
Statement
Data produced with Project LEFE/INSU ZEBRE

Metadata

File identifier
ee0df940-a26b-4e74-360b-3e7da111a151   XML
Metadata language
English
Character set
UTF-8 UTF8
Hierarchy level
Dataset Dataset
Date stamp
2021-12-01T12:00:04.122+01:00
 
 

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