Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibration
This paper extensively investigates the performance of the representative SBE 3 deep-sea thermometer (Sea-Bird Scientific) under various stepwise pressure conditions. A high-precision pressure-temperature vessel was employed to simulate deep sea environments, conducting systematic pressure experimen...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2024.1528496/full |
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| author | Muzi Zhang Muzi Zhang Qingquan Sun Qingquan Sun Xiaoxue Bai Xiaoxue Bai Chi Wu Chi Wu Chi Wu |
| author_facet | Muzi Zhang Muzi Zhang Qingquan Sun Qingquan Sun Xiaoxue Bai Xiaoxue Bai Chi Wu Chi Wu Chi Wu |
| author_sort | Muzi Zhang |
| collection | DOAJ |
| description | This paper extensively investigates the performance of the representative SBE 3 deep-sea thermometer (Sea-Bird Scientific) under various stepwise pressure conditions. A high-precision pressure-temperature vessel was employed to simulate deep sea environments, conducting systematic pressure experiments with precise temperature control (0.5 mK) across a temperature range of -2 to 35°C and from atmospheric pressure to full ocean depth (0–12700 m). A Standard platinum resistance thermometer (SPRT), isolated from the pressure environment and placed adjacent to the SBE 3, served as a calibration reference throughout the experiments. The drift of the SBE 3, reaching up to 10 mK in this study, was meticulously quantified at varying pressures and temperatures. Subsequently, a linear calibration method was developed, ensuring that the thermometer maintained an accuracy of ±0.0005°C (± 0.5 mK) across all tested high-pressure conditions, including a maximum pressure of 1050 bar. Crucially, this study discusses the negative impact of pressure-induced temperature errors on the estimation of ocean heat content in the Pacific, emphasizing the importance of conducting high-pressure calibration tests before and after oceanographic deployments. These measures are vital for ensuring the accuracy of deep-sea temperature measurements, which are critical for understanding global climate dynamics and improving the calibration of deep-sea sensors. |
| format | Article |
| id | doaj-art-9474f0207786423e9e2c330f9ca833c0 |
| institution | Kabale University |
| issn | 2296-7745 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj-art-9474f0207786423e9e2c330f9ca833c02025-01-23T05:10:25ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452025-01-011110.3389/fmars.2024.15284961528496Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibrationMuzi Zhang0Muzi Zhang1Qingquan Sun2Qingquan Sun3Xiaoxue Bai4Xiaoxue Bai5Chi Wu6Chi Wu7Chi Wu8Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaShandong Provincial Center for in-situ Marine Sensors, Institute of Marine Science and Technology, Shandong University, Qingdao, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaShandong Provincial Center for in-situ Marine Sensors, Institute of Marine Science and Technology, Shandong University, Qingdao, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaShandong Provincial Center for in-situ Marine Sensors, Institute of Marine Science and Technology, Shandong University, Qingdao, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaShandong Provincial Center for in-situ Marine Sensors, Institute of Marine Science and Technology, Shandong University, Qingdao, ChinaShandong Provincial Center for in-situ Marine Sensors, Aixsensor Co. Ltd., Dezhou, Shandong, ChinaThis paper extensively investigates the performance of the representative SBE 3 deep-sea thermometer (Sea-Bird Scientific) under various stepwise pressure conditions. A high-precision pressure-temperature vessel was employed to simulate deep sea environments, conducting systematic pressure experiments with precise temperature control (0.5 mK) across a temperature range of -2 to 35°C and from atmospheric pressure to full ocean depth (0–12700 m). A Standard platinum resistance thermometer (SPRT), isolated from the pressure environment and placed adjacent to the SBE 3, served as a calibration reference throughout the experiments. The drift of the SBE 3, reaching up to 10 mK in this study, was meticulously quantified at varying pressures and temperatures. Subsequently, a linear calibration method was developed, ensuring that the thermometer maintained an accuracy of ±0.0005°C (± 0.5 mK) across all tested high-pressure conditions, including a maximum pressure of 1050 bar. Crucially, this study discusses the negative impact of pressure-induced temperature errors on the estimation of ocean heat content in the Pacific, emphasizing the importance of conducting high-pressure calibration tests before and after oceanographic deployments. These measures are vital for ensuring the accuracy of deep-sea temperature measurements, which are critical for understanding global climate dynamics and improving the calibration of deep-sea sensors.https://www.frontiersin.org/articles/10.3389/fmars.2024.1528496/fulldeep-sea thermometricdeep-sea environmental simulationhigh-pressure calibrationpressure-dependent driftocean heat content |
| spellingShingle | Muzi Zhang Muzi Zhang Qingquan Sun Qingquan Sun Xiaoxue Bai Xiaoxue Bai Chi Wu Chi Wu Chi Wu Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibration Frontiers in Marine Science deep-sea thermometric deep-sea environmental simulation high-pressure calibration pressure-dependent drift ocean heat content |
| title | Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibration |
| title_full | Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibration |
| title_fullStr | Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibration |
| title_full_unstemmed | Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibration |
| title_short | Elucidating deep-sea thermometric deviations and their consequences for oceanic heat content assessment via high-pressure calibration |
| title_sort | elucidating deep sea thermometric deviations and their consequences for oceanic heat content assessment via high pressure calibration |
| topic | deep-sea thermometric deep-sea environmental simulation high-pressure calibration pressure-dependent drift ocean heat content |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2024.1528496/full |
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