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CONTEXT :
This Google Sheet aims to centralize the work done by the DMQC operators concerning the fast salinity draft issue concerning SeaBird CTDs.
The format of this document, the title of columns and thresholds were initially chosen when continuing a document started by Birgit Klein
when she gathered all the European DMQC operators inputs on this issue.

Update 12/12/2022: In order to simplify the DM operator work and because, the additionnal data are now extracted from GDAC directly,
it has been accepted during the ADMT-23 that the number of columns be simplified to 5.
The old file remains accessible through this link (read-only): https://docs.google.com/spreadsheets/d/1tn60wN8FNcGnVismPPbtFGu7bju7dzWhQkDG68KjhE4/edit?pli=1#gid=0
The complete analysis made end of November 2022 (in preparation for ADMT-23) is accessible through this link (read-only):
https://docs.google.com/spreadsheets/d/1-ncALzdIrEY6OIwxA64hKp_TnZytIG-O/edit#gid=0
This will be updated before AST and ADMT each year.


!! After Adding a (list of) new entry (ies) to the table, please go to "file>version history" and click "name the actual version" with your name, date and the modifications you just made !!

ASD DEFINITION :
ASD (Abrupt Salinity Drift) or former FSD (Fast Salinity Drift) refers to salinity data from SBS (SBE41-CP with serial numbers > 6000, and all SBE61) that developed salty drifts earlier than expected (before cycle 80),
and progressed to a failed/uncorrectable state. These salty drifters show the following general characteristics:
a) the sensor drift rate accelerates rapidly and abruptly
b) the sensor drift trend is erratic, often with jumps between consecutive profiles, and can reverse in direction;
c) the onset of (a) and/or (b) can sometimes be seen as an inflection point or a jump in the float salinity time series.


FIELDS DEFINITION :
- C1 => Cycle where a moderate (i.e. adjustable) salinity drift begins (usually before cycle 80). If, when the failure begins, it is directly uncorrectable, please let the C1 column blank.
- C2 => Cycle where a severe (i.e. unadjustable) salinity drift begins. If the sensor does not reach unadjustable state, please let the C2 column blank.
- Make sure C1 < C2
- the description for evaluating what's "adjustable" or "unadjustable" in delayed-mode can be found in the Argo QC Manual, Section 3.6. https://archimer.ifremer.fr/doc/00228/33951/

Please consider to put your active ASD floats in the grey list if relevant.


For any question please do not hesitate to contact: contact@euro-argo.eu


Update 30/05/2022: The statistics tab were removed from the Google Spreadsheet (the spreadsheet was becoming too heavy)
Update 12/12/2022: Reduction to 5 columns + analysis in a separate and read-only spreadsheet.
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