| A calibration method of Argo floats based on multiple regression analysis |
| |
| 作者姓名： | 纪风颖 王凡 |
| |
| 作者单位： | National Marine Data and Information Service of China Tianjun 300171 China，Ocean University of China Qingdao 266003 China，Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China |
| |
| 基金项目： | This project is supported by NSFC (No. 40376010), and also supported by SOA, China. |
| |
| 摘 要： | 1 INTRODUCTION Argo floats are instruments that move freely with the ocean current at fixed parking depths and cycle from a profiling depth to the sea surface at regular time intervals. While rising to the surface, these autonomous floats take profiles of…
|
| 关 键 词： | 海退 浮物 海洋环境 污染物 |
| 收稿时间： | 2004-09-10 |
| 修稿时间： | 2005-02-26 |
A calibration method of Argo floats based on multiple regression analysis |
| |
| Ji Fengying,Wang Fan.A calibration method of Argo floats based on multiple regression analysis[J].Chinese Journal of Oceanology and Limnology,2006,24(2):118-124. |
| |
| Authors: | Ji Fengying Wang Fan |
| |
| Institution: | (1) National Marine Data and Information Service of China, 300171 Tianjun, China;(2) Ocean University of China, 266003 Qingdao, China;(3) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, China |
| |
| 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.
This project is supported by NSFC (No. 40376010), and also supported by SOA, China. |
| |
| Keywords: | Argo calibration multiple-regression analysis |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
