FN Archimer Export Format
PT J
TI Accuracy and long-term stability assessment of inductive conductivity cell measurements on Argo floats
BT 
AF Nezlin, Nikolay P.
   Dever, Mathieu
   Halverson, Mark
   Leconte, Jean-Michel
   Maze, Guillaume
   Richards, Clark
   Shkvorets, Igor
   Zhang, Rui
   Johnson, Greg
AS 1:1;2:1,2;3:1;4:1;5:3;6:4;7:1;8:1;9:1;
FF 1:;2:;3:;4:;5:PDG-ODE-LOPS-OH;6:;7:;8:;9:;
C1 RBR Ltd., Ottawa, ON, Canada
   Woods Hole Oceanographic Institution
   IFREMER, Brest, France
   Bedford Institute of Oceanography, Dartmouth, NS, Canada
C2 RBR LTD, CANADA
   WHOI, USA
   IFREMER, FRANCE
   BEDFORD INST OCEANOG, CANADA
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   copubli-int-hors-europe
IF 2.075
TC 2
UR https://archimer.ifremer.fr/doc/00654/76568/77698.pdf
LA English
DT Article
DE ;Pacific Ocean;Salinity;Instrumentation/sensors;Profilers;oceanic;Quality assurance/control
AB This study demonstrates the long-term stability of salinity measurements from Argo floats equipped with inductive conductivity cells, which have extended float lifetimes as compared to electrode-type cells. New Argo float sensor payloads must meet the demands of the Argo governance committees before they are implemented globally. Currently, the use of CTDs with inductive cells designed and manufactured by RBR Ltd., has been approved as a Global Argo Pilot. One requirement for new sensors is to demonstrate stable measurements over the lifetime of a float. To demonstrate this, data from four Argo floats in the western Pacific Ocean equipped with the RBRargo CTD sensor package are analyzed using the same Owens-Wong-Cabanes (OWC) method and reference datasets as the Argo Delayed Mode Quality Control (DMQC) operators. When ran with default settings against the standard DMQC Argo and CTD databases, the OWC analysis reveals no drift in any of the four RBRargo datasets and in one case an offset exceeding the Argo target salinity limits. Being a statistical tool, the OWC method cannot strictly determine whether deviations in salinity measurements with respect to a reference hydrographic product (e.g., climatologies) are caused by oceanographic variability or sensor problems. So, this study furthermore investigates anomalous salinity measurements observed when compared to a reference product and demonstrates that anomalous values tend to occur in regions with a high degree of variability and can be better explained by imperfect reference data rather than sensor drift. This study concludes that the RBR inductive cell is a viable option for salinity measurements as part of the Argo Program. 
PY 2020
PD DEC
SO Journal Of Atmospheric And Oceanic Technology
SN 0739-0572
PU American Meteorological Society
VL 37
IS 12
UT 000637562900005
BP 2209
EP 2223
DI 10.1175/JTECH-D-20-0058.1
ID 76568
ER

EF