The improvement of CTD data through post processing SCOPUS KCI

Title
The improvement of CTD data through post processing
Author(s)
Choi, A.-R.; Park, Y.-G.; Min, H.S.; Kim, K.-H.
KIOST Author(s)
Park, Young Gyu(박영규)Kim, Kyeong Hong(김경홍)
Publication Year
2009
Abstract
It is possible to obtain accurate temperature and salinity profiles of the oceans using a SBE 911plus CTD and accompanying data conversion packages. To obtain highly accurate results, CTD data needs to be carefully processed in addition to proper and regular maintenance of the CTD itself. Since the manufacturer of the CTD provides tools that are necessary for post processing, it is possible to conduct proper processing without too much effort. Some users, however, are not familiar with all of the processes and inadvertently ignore some of these processes at the expense of data quality. To draw attention to these and other similar issues, we show how it is possible to improve data quality by utilizing a few extra processes to the standard or default data process procedures with CTD data obtained from the equatorial Eastern Pacific between 2001 and 2005, and 2007. One easy step that is often ignored in the standard data process procedure is wild edit, which removes abnormal values from the raw data. If those abnormal values are not removed, the abnormality could spread vertically during subsequent processes and produce abnormal salinity in a range much wider than that of the raw data. To remove spikes in salinity profiles the align CTD procedure must be carried out not with the default values included in the data processing software but with a proper time constant. Only when cell thermal mass correction is conducted with optimal parameters, we can reduce the difference between upcast and downcast, and obtain results that can satisfy the nominal accuracy of the CTD.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4374
DOI
10.4217/OPR.2009.31.4.339
Bibliographic Citation
Ocean and Polar Research, v.31, no.4, pp.339 - 347, 2009
Keywords
Ctd data post processing; Data quality control
Type
Article
Language
Korean
Document Type
Note
Related Researcher
Research Interests

Seawater Chemistry,Geochemistry,해수화학,지화학

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