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  Measurement biases in temperature profiles from marine mammal data loggers: A global analysis

Gouretski, V., Cheng, L., Roquet, F. (2023): Measurement biases in temperature profiles from marine mammal data loggers: A global analysis, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2992

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018917 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018917_2
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 Urheber:
Gouretski, Viktor1, Autor
Cheng, Lijing1, Autor
Roquet, Fabien1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Zusammenfassung: The data loggers attached to marine mammals represent an instrumentation type which provided a significant amount of temperature profiles for the moderate and polar regions since the 2000s. In the World Ocean Database WOD18 marine mammal data contribute ~60% of temperature profiles south of 50oS for 2005 – 2018 and ~40% of profiles north of 40oN being a significant data source for the estimation of the global ocean warming along with the data from ship-based CTDs and Argo floats. Use of the marine mammal data for the ocean heat content estimation requires the assessment of possible instrumental biases. For the first time we assess temperature biases in marine mammal data by comparing these data with temporarily and spatially collocated reference temperature profiles from Argo floats and ship-based CTDs. For the SRDL recorders implemented mostly in the Southern Ocean our estimates indicate a prevailing time- and sensor type dependent thermal negative temperature bias within the range -0.01 to -0.04oC. The less accurate TRD recorders implemented earlier on mammals in the North Pacific are characterized by a different bias pattern, showing the predominantly positive bias of about 0.08 to 0.10oC below 100 m. The derived total TRD bias can be decomposed into a small positive thermal bias (~0.02oC) and the bias due to the systematic error in pressure (depth). Based on the results of the study we provide corrections for instrumental temperature biases both in SRDL and TRD recorders.

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Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.57757/IUGG23-2992
 Art des Abschluß: -

Veranstaltung

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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