BGC-Argo synthetic profiles distributed on GDAC

BGC-Argo synthetic profiles are now distributed on Argo GDAC ftp server.

This is an update on ADMT action #19.

ADMT19 action 16 S-prof files will replace M-prof files and will be compressed into NetCDF4.  GDACs to decide whether to both produce S-prof files or to mirror them.  Inform users through ADMT website, emails.

 

BGC-Argo synthetic profiles (S-prof)

To facilitate the use of BGC-Argo profiles, synthetic cycle profiles are now distributed on Coriolis GDAC from the existing core and BGC Argo profiles.

For each cycle, the existing Argo NetCDF V3.1 profile file contains one or more core-Argo profile (pressure, temperature, salinity) and one or more additional BGC profile (oxygen, chlorophyll, etc…).

Data are stored into two or more arrays (N_PROF >= 2).

 

To improve co-location of different BGC samples, a merged cycle profile is generated into one single array (N_PROF = 1). The core-Argo and BGC observations are vertically aligned on pressure levels.

The detailed specification is published in:

  • Bittig Henry, Wong Annie, Plant Josh, Coriolis Argo Data Management Team (2019). BGC-Argo synthetic profile file processing and format on Coriolis GDAC. https://doi.org/10.13155/55637

 

The index of BGC-Argo synthetic profile files is available on:

 

Examples of S-prof

The synthetic BGC profile of float 6901585 cycle 1 with its 13 BGC parameters
down_irradiance380 down_irradiance412 down_irradiance490 downwelling_par chla chla_adjusted bbp700 cdom doxy cp660

The synthetic BGC profiles of float 6901585 aggregated in one file

 

GDAC synchronization of S-prof

The US-GDAC is working on a synchronization of synthetic profiles from Coriolis GDAC.

 

S-prof samples distribution

The S-prof samples distribution on ftp://ftp.ifremer.fr/ifremer/argo/etc/argo-synthetic-profile will be stopped on September 27th. The valid distribution of S-prof is now directly performed in the “dac” directory  (one directory per BGC-Argo float).

 

M-prof distribution

The existing M-prof (merged BGC profiles) is to be replaced by S-prof.

The distribution of M-prof profiles will stop in December 2019.