@@ -196,9 +196,9 @@ The main tests performed on the data are:
\begin{description}
\item[range:] depending on the variable considered, low and high threshold are assigned. First there is a global range: if the measured values falls outside, then the flag is set to 4 (bad data). Then a regional range test is applied: the measurements outside this range are assigned the flag 2 (probably good).
\item[spike:] the test consists in checking the difference between sequential measurements (i.e. not measured at the same time). For the $\jmath$-th measurement:
When the spike value is above the threshold (depending on the variable), the flag is set to 6.
\item[gradient:] it is computed for the variables along different coordinates (horizontal, depth, time).
\item[stationarity:] it aims to checks if measurements exhibit some variability over a period of time, by computing the difference between the extremal values over that period.
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@@ -262,7 +262,7 @@ On May 25 at 19:24 (UTC), the deep glider payload suffered an issue with the dat
\caption{Deployment positions and trajectories of the gliders. Different time instances separated by one day are indicated on the tracks to provide a temporal dimension.\label{fig6:glidertracks}}
\end{figure}
The mean vertical separation between 2 consecutive measurements is around 16~cm. Figure~\ref{fig6:glidersections} displays the temperature and salinity sections obtained with the 2 vehicles. The high density of measurements makes it possible to distinguish small-scale features on both sides of the front, such as strong lateral gradients, subduction or filament structures.
The mean vertical separation between 2 consecutive measurements is around 16~cm. Figure~\ref{fig6:glidersections} displays the temperature and salinity sections obtained with the 2 vehicles. The high density of measurements makes it possible to distinguish small-scale features on both sides of the front, such as strong lateral gradients, subduction or filament structures.
\begin{figure*}[t]
\includegraphics[width=\textwidth]{fig07.png}
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@@ -302,6 +302,8 @@ Before the deployment, glider compass was calibrated following \cite{MERCKELBACH
The checks not yet applied but planned for the next release of the Glider toolbox include: the removal of $NaN$ values, the detection of impossible dates or locations, valid ranges (depending on depth) for the variables, spikes, gradients and constant value over a large range of depths in the profiles. The tests performed that the constant value check proved useful for conductivity (and hence density and salinity). A new version of the present dataset will be released once these new checks are made operational.
Finally, oxygen data (not shown here) seem to exhibit
\subsection{Surface drifters}
On May 25, 25 Surface Velocity Program \citep[SVP,][]{LUMPKIN2007} drifters were deployed in the frontal area in a tight square pattern with a mean distance between neighbor drifters around 3~km. In the Mediterranean Sea, they have been shown to provide information on the surface dynamics, ranging from basin scales to mesoscale features or coastal currents \citep{POULAIN13}. Almost all the drifters were equipped with a thermistor on the lower part of the buoy to measure sea water temperature.
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@@ -329,7 +331,8 @@ The drifters deployed during the experiment are the mini-World Ocean Circulation
\subsubsection{Quality control}
Tests are applied on the position, velocity and temperature records (valid ranges and spikes). Checking the platform speed is particularly relevant, as abnormally high values are intermittently encountered. See \citet{SOCIBQC2018} for the threshold values used in the checks.
Tests are applied on the position (i.e. on land), velocity and temperature records (valid ranges and spikes). Checking the platform speed is particularly relevant, as abnormally high values are intermittently encountered. See \citet{SOCIBQC2018} for the threshold values used in the checks.
In addition, the method developed by \citet{RIO12} is used to improve the accuracy of the drogue presence from wind slippage \citet{MENNA18}.
