A calibration method of Argo floats based on multiple regression analysis

Ji Fengying; Wang Fan

doi:10.1007/BF02842809

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A calibration method of Argo floats based on multiple regression analysis

OriginalPaper | Updated：2023-05-16

- A calibration method of Argo floats based on multiple regression analysis
- A calibration method of Argo floats based on multiple regression analysis
- 海洋湖沼学报（英文） 2006年24卷第2期页码：118-124
- Affiliations：
  
  1. National Marine Data and Information Service of China
  2. Ocean University of China
  3. Institute of Oceanology Chinese Academy of Sciences
- Author bio：
- Funds：
  
  This project is supported by NSFC (No. 40376010), and also supported by SOA, China.
- DOI：10.1007/BF02842809
  中图分类号：
- 网络首发：2013-01-31，
  
  纸质出版：2006
- Accepted：
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A calibration method of Argo floats based on multiple regression analysis[J]. 海洋湖沼学报（英文）, 2006,24(2):118-124.

Fengying, J., Fan, W. A calibration method of Argo floats based on multiple regression analysis., Chin. J. Ocean. Limnol. 24, 118–124 (2006). https://doi.org/10.1007/BF02842809
A calibration method of Argo floats based on multiple regression analysis[J]. 海洋湖沼学报（英文）, 2006,24(2):118-124. DOI： 10.1007/BF02842809.

Fengying, J., Fan, W. A calibration method of Argo floats based on multiple regression analysis., Chin. J. Ocean. Limnol. 24, 118–124 (2006). https://doi.org/10.1007/BF02842809 DOI：

摘要

Abstract

Argo floats are free-moving floats that report vertical profiles of salinity

temperature and pressure at regular time intervals. These floats give good measurements of temperature and pressure

but salinity measurements may show significant sensor drifting with time. It is found that sensor drifting with time is not purely linear as presupposed by Wong (2003). A new method is developed to calibrate conductivity data measured by Argo floats. In this method

Wong’s objective analysis method was adopted to estimate the background climatological salinity field on potential temperature surfaces from nearby historical data in WOD01. Furthermore

temperature and time factors are taken into account

and stepwise regression was used for a time-varying or temperature-varying slope in potential conductivity space to correct the drifting in these profiling float salinity data. The result shows salinity errors using this method are smaller than that of Wong’s method

the quantitative and qualitative analysis of the conductivity sensor can be carried out with our method.

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Keywords

references

Bacon, S., L. Centurioni and W. Gould, 2001. The evaluation of salinity measurements from PALACE floats.J. Atmos. Oceanic Technol. 18: 1258–1266.

Bretherton, F., R. Davis and C. Fandry, 1976. A technique for objective analysis and design of oceanographic experiments applied to MODE-73.Deep-Sea Res. 23: 559–582.

Dickson, R., J. Lazier, J. Meincke, P. Rhines and J. Swift, 1996. Long-term coordinated changes in the convective activity of the North Atlantic.Progress in Oceanogr.38: 241–295.

Dickson, R., J. Hurrell, N. Bindoff, A. Wong, B. Arbic, B. Owens, S. Imawaki, I. Yashayaev, 2001. The World during WOCE.In: Siedler, G., J. Church, G. J. Gould eds, Ocean Circulation and Climate-Observing and Modelling the Global Ocean, edited by, 715 pp, Academic Press, London.

Wong, A. P. S., G. C. Johnson and W. B. Owens, 2003. Delayed-mode calibration of autonomous CTD profiling float salinity data by θ-S climatology.J. Atmos. Oceanic Technol. 20:308–318.

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