Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Quality Control Methods for CTD Data Collected by Using Instrumented Marine Mammals: A Review and Case Study

해양포유류 부착 CTD 관측 자료의 품질 관리 방법에 관한 고찰 및 사례 연구

  • Yoon, Seung-Tae (School of Earth System Sciences, College of Natural Sciences, Kyungpook National University) ;
  • Lee, Won Young (Division of Life Sciences, Korea Polar Research Institute, Korea Institute of Ocean Science & Technology)
  • 윤승태 (경북대학교 자연과학대학 지구시스템과학부) ;
  • 이원영 (한국해양과학기술원부설 극지연구소 생명과학연구부)
  • Received : 2021.09.08
  • Accepted : 2021.10.25
  • Published : 2021.12.30
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Abstract

'Marine mammals-based observations' refers to data acquisition activities from marine mammals by instrumenting CTD (Conductivity-Temperature-Depth) sensors on them for recording vertical profiles of ocean variables such as temperature and salinity during animal diving. It is a novel data collecting platform that significantly improves our abilities in observing extreme environments such as the Southern Ocean with low cost compared to the other conventional methods. Furthermore, the system continues to create valuable information until sensors are detached, expanding data coverage in both space and time. Owing to these practical advantages, the marine mammals-based observations become popular to investigate ocean circulation changes in the Southern Ocean. Although these merits may bring us more opportunities to understand ocean changes, the data should be carefully qualified before we interpret it incorporating shipboard/autonomous vehicles/moored CTD data. In particular, we need to pay more attention to salinity correction due to the usage of an unpumped-CTD sensor tagged on marine mammals. In this article, we introduce quality control methods for the marine mammals-based CTD profiles that have been developed in recent studies. In addition, we discuss strategies of quality control specifically for the seal-tagging CTD profiles, successfully having been obtained near Terra Nova Bay, Ross Sea, Antarctica since February 2021. It is the Korea Polar Research Institute's research initiative of animal-borne instruments monitoring in the region. We anticipate that this initiative would facilitate collaborative efforts among Polar physical oceanographers and even marine mammal behavior researchers to understand better rapid changes in marine environments in the warming world.

Keywords

Acknowledgement

이 논문 작성에 유익한 조언을 주신 극지연구소 빙하환경연구본부 이원상 박사님께 감사드립니다. 그리고 현장조사를 수행한 장보고기지 월동대 박지강 생물대원에게 감사를 표합니다. 이 논문은 서남극 스웨이트 빙하 돌발붕괴의 기작규명 및 해수면 상승 영향 연구(KIMST20190361), 극지연구소 기관고유사업(PE21140)의 지원을 받아 작성되었습니다. 이 논문 작성에는 두 저자가 동일한 기여를 하였습니다.

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