coriolis data center

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Reference Database for Argo DMQC
C. COATANOAN
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Reference Database for Argo Delayed Mode Quality
Control
Data Source WOD2005 from NODC Data collected
from OCEAN CLIMATE LABORATORY
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Reference Database for Argo Delayed Mode Quality
Control

• Quality Control and storage
• Quality indicator FLAG from NODC, Coriolis QC
  (automatic tests objective analysis)
• Others Criteria
• - Casts deeper than 900 dbar (to exclude coastal
  stations and stations shallower than the T-min
  layers)
• - Full-depth profiles kept for station

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Reference Database for Argo Delayed Mode Quality
Control
Boxes Data into separated 10x10 WMO boxes and
stored under filename ctd_ltnwmogt.mat Temperature
Conversion for in-situ temperature (ITS-90
converted in ITS-68) Salinity weed out all
data points outside these ranges 24ltSlt41
All profiles stored in original un-interpolated
vertical resolution
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Reference Database for Argo Delayed Mode Quality
Control

• Quality Control and storage
• Details on variables
• dates (1xn, yyymmddhhmmss)
• lat (1xn, north is , south is -)
• long (1xn, 0 to 360, e.g. 60W300)
• pres (mxn, in dbar)
• sal (mxn, salinity)
• temp (mxn, in-situ temperature in ITS-68)
• ptmp (mxn, potential temperature relative to 0
  dbar)
• source (1xn, unique character strings stored in a
  cell array station_id)

ctd_3405.mat source 1x47 cell dates 1x47
double long 1x47 double lat 1x47
double ptmp 2000x47 double pres 2000x47
double sal 2000x47 double temp 2000x47
double
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Reference Database for Argo Delayed Mode Quality
Control
After quality control and others criteria to
provide the CTD dataset
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Reference Database for Argo Delayed Mode Quality
Control
WOD2005 (red) What we have more than the
WOD2001 (blue) ?
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Reference Database for Argo Delayed Mode Quality
Control
WOD2001 (blue) missing data in WOD2005 and/or
after quality control ? Old data lt 1990 (no
objective analysis for years older than 1990)
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Reference Database for Argo Delayed Mode Quality
Control
Distribution of stations for each year and
database
3500
6000
3500
1990
1990
2000
2000
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Reference Database for Argo Delayed Mode Quality
Control
For each box
-7000
-5000
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Reference Database for Argo Delayed Mode Quality
Control
-6000
-6000
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Reference Database for Argo Delayed Mode Quality
Control
Source station_id in the Coriolis database
Unique ID in the Coriolis database gtgt
load('ctd_3502.mat') Name Size
Bytes Class JULD 1x13
104 double array LAT
1x13 104 double array LON
1x13 104 double
array PRES 5944x13
618176 double array PSAL 5944x13
618176 double array PTMP 5944x13
618176 double array SOURCE
1x13 962 cell array
TEMP 5944x13 618176
double array SOURCE Columns 1 through 9
'2637746' '2637791' '2637836' '2898854'
'2898866' '2898882' '2898890'
'2898899' '2898913 Columns 10 through
13 '2898927' '2898936' '2900392'
'2900408'
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Reference Database for Argo Delayed Mode Quality
Control

• Where find data ?
• On the ftp site
• ftp.ifremer.fr
• cd coriolis/data/DMQC-ARGO
• Ask for the login and password (codac_at_ifremer.fr)
• to do a list of users Information about updates
• ARGO2008V01.tar.gz
• argo_clim.tar.gz
• doc_about_argo_clim

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Reference Database for Argo Delayed Mode Quality
Control
Not yet done - wmo boxes with more than 10000
profiles, only select profiles that are post-1995

• Future
• Complete with old data (before 1990)
• Add recent CTD
• Update reference dataset on a regularly base