Measurement Biases in Ocean Temperature Profiles from Marine Mammal Dataloggers
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| Názov: | Measurement Biases in Ocean Temperature Profiles from Marine Mammal Dataloggers |
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| Autori: | Gouretski, Viktor, Roquet, Fabien, 1982, Cheng, Lijing |
| Zdroj: | JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY. 41(7):629-645 |
| Predmety: | Meteorology and Atmospheric Sciences, Meteorologi och atmosfärsvetenskap, Instrumentation/sensors, Bias, Quality assurance/control, Statistical techniques, Uncertainty |
| Popis: | The study focuses on biases in ocean temperature profiles fi les obtained by means of Satellite Relay Data Loggers (SRDL recorders) and time-depth recorder (TDR) attached to marine mammals. Quasi-collocated profiles fi les from Argo fl oats and from ship-based conductivity-temperature-depth (CTD) profilers fi lers are used as reference. SRDL temperature biases depend on the sensor type and vary with depth. For the most numerous group of Valeport 3 (VP3) and conductivity- temperature-fluorescence fl uorescence (CTF) sensors, the bias is negative except for the layer 100-200 m. The vertical bias structure suggests a link to the upper-ocean thermal structure within the upper 200-m layer. Accounting for a time lag which might remain in the postprocessed data reduces the bias variability throughout the water column. Below 200-m depth, the bias remains negative with the overall mean of 2 0.027 degrees 6 0.07 degrees C. degrees C. The suggested depth and thermal corrections for biases in SRDL data are within the uncertainty limits declared by the manufacturer. TDR recorders exhibit a different bias pattern, showing the predominantly positive bias of 0.08 degrees-0.14 degrees C degrees- 0.14 degrees C below 100 m primarily due to the systematic error in pressure. |
| Prístupová URL adresa: | https://gup.ub.gu.se/publication/339997 |
| Databáza: | SwePub |
Nájsť tento článok vo Web of Science | Abstrakt: | The study focuses on biases in ocean temperature profiles fi les obtained by means of Satellite Relay Data Loggers (SRDL recorders) and time-depth recorder (TDR) attached to marine mammals. Quasi-collocated profiles fi les from Argo fl oats and from ship-based conductivity-temperature-depth (CTD) profilers fi lers are used as reference. SRDL temperature biases depend on the sensor type and vary with depth. For the most numerous group of Valeport 3 (VP3) and conductivity- temperature-fluorescence fl uorescence (CTF) sensors, the bias is negative except for the layer 100-200 m. The vertical bias structure suggests a link to the upper-ocean thermal structure within the upper 200-m layer. Accounting for a time lag which might remain in the postprocessed data reduces the bias variability throughout the water column. Below 200-m depth, the bias remains negative with the overall mean of 2 0.027 degrees 6 0.07 degrees C. degrees C. The suggested depth and thermal corrections for biases in SRDL data are within the uncertainty limits declared by the manufacturer. TDR recorders exhibit a different bias pattern, showing the predominantly positive bias of 0.08 degrees-0.14 degrees C degrees- 0.14 degrees C below 100 m primarily due to the systematic error in pressure. |
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| ISSN: | 07390572 15200426 |
| DOI: | 10.1175/JTECH-D-23-0081.1 |