DMQC cookbook for core Argo parameters

This cookbook is to document the end-to-end processing chain of Delayed Mode Quality Control (DMQC) of Core Argo parameters. It provides guidelines on existing manuals, and explains best practices through case studies. This document was initiated after the 1st EU DMQC workshop held in Brest in April 2018, under the MOCCA project. Lately, this work has been undertaken under EuroArgo RISE project. The document is organized as follows. The first part gives some general information (e.g.: How to check quality indicators in delayed mode? What are the reference databases? How to correct pressure? How to use the OWC software to correct salinity? What are the common failures? etc.). The second part gives more specific information for the regional analysis (specific difficulties encountered, reference data available in regional seas, configuration parameters usually used, etc...). The regions covered so far are: the sub-polar Atlantic zone, the Nordic Seas, the Mediterranean and Black Seas, and the Southern Ocean. The third part of the cookbook presents detailed examples of delayed-mode processing for float data in these regions

Surface Pressure of PROVOR/ARVOR floats based on Coriolis GDAC at 19/09/2012

In this report, we check the surface pressure of the Argo PROVOR-ARVOR fleet to detect drift and problems of the pressure sensors. For each DAC and for each float model, we count how many floats have surface pressure (SP) that exeeds 5dB (absolute value). Negative drift are associated with microleak of the Druck pressure sensor. Surface pressure problems at the end of the life of the float might be related to the ”snowflakes” problem. Other surface pressure problems occur and part of them might be related to decoding problems (jump,shift,..)

Surface Data of PROVOR/ARVOR floats based on Coriolis GDAC at 08/03/2013

flThis report describes how the PROVOR and ARVOR oats work close to the sea surface and gives some recommendations on the real time QC tests that should be applied to the near surface salinity and temperature data. The CTD collects discrete (P,T,S) triplets every 10 s but the data is bin-averaged before being transmitted by satellite. Within a slice, instantaneous measurements are rst decimated, keeping triplets that are distant by more than 0.5 dbar and then averaged. Means are calculated using the data at the full resolution available (1 cbar for pressure) and rounded to the transmitted resolution (generally 1 dbar for pressure for ARGOS satellite system, 1 cbar for IRIDIUM). PROVOR and ARVOR floats acquire temperature and salinity data all the way up to the sea surface. However, when the oat reaches the surface (generally 5 dbar), the CTD pump is switched o to prevent the sensor from being damaged. Unpumped salinity data -or partially pumped for some bin-averaged- are of dubious quality. The test that allows to separate the unpumped or partially pumped data from the pumped ones is given in this report. Temperature data obtained when the CTD pump is turned o is not problematic, but those acquired in the rst bin closest to the sea surface at pressure smaller or equal to 1 dbar may contain some mixed air/water measurements. The data quality of these mixed air/water measurements cannot be determined in real-time

Delayed mode quality control and Oxygen correction of Ovide Argo data. Float WMO 1901208

This report presents the delayed mode analysis of an Argo float. Real time quality control are checked and interesting profiles are plotted. The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any. In this report, are also explained and plotted Oxygen corrections with LOCODOX software

Delayed mode quality control of Ovide Argo Data. Float WMO 6900395

This report presents the delayed mode analysis of an Argo float. Real time quality control flags are checked and interesting profiles are plotted. The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any

Delayed mode quality control and Oxygen correction of Ovide Argo data. Float WMO 5902303

This report presents the delayed mode analysis of an Argo float. Real time quality control are checked and interesting profiles are plotted. The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any. In this report, are also explained and plotted Oxygen corrections with LOCODOX software

Delayed mode quality control of Ovide Argo Data. Float WMO 6900640

This report presents the delayed mode analysis of an Argo float. Real time quality control flags are checked and interesting profiles are plotted. The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any

Delayed mode quality control and Oxygen correction of Ovide Argo data. Float WMO 1901209

This report presents the delayed mode analysis of an Argo float. Real time quality control are checked and interesting profiles are plotted. The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any. In this report, are also explained and plotted Oxygen corrections with LOCODOX software. Cruise reference : METEOR 85/2. 2011. PI :  Johannes Karstensen

Delayed mode quality control and Oxygen correction of Ovide Argo data. Float WMO 5902298

This report presents the delayed mode analysis of an Argo float. Real time quality control flags are checked and interesting profiles are plotted. The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any. In this report, are also explained and plotted Oxygen corrections with LOCODOX software

Delayed mode analysis of DEEP ARVOR floats

Delayed Mode analysis was performed for deep Arvor floats. First, salinity and temperature profiles were compared to nearby historical CTD profiles. Real time QC flags were verified and modified if necessary. The OW method was  run to estimate a salinity offset or/and a salinity drift using historical CTD profiles as a reference database. Finally, if necessary, the corrections were applied and corrected files were sent to the Coriolis DAC