Changes in Temperature, Chlorophyll Concentration, and Secchi Disk Depth in the Okhotsk Sea from 1998 to 2016

  • Chen-Tung Arthur ChenEmail author
  • Shujie Yu
  • Ting-Hsuan Huang
  • Yan Bai
  • Xianqiang He
Part of the Atmosphere, Earth, Ocean & Space book series (AEONS)


The Okhotsk Sea is located in a subarctic zone with characteristics such as ice cover in winter. Like other high-latitude seas, the Okhotsk Sea is undergoing rapid changes. Notably, its sea surface temperature (SST) increased by about 4.5 °C/century between 1998 and 2016, exceeding the reported rate of increase of 1.3 °C/century between 1982 and 2006. During the same period (1998–2016), the chlorophyll concentration increased by 0.01 μg/L (0.99%) annually. The Secchi disk depth (SDD) slightly increased at 0.018 m/yr. These changes in the SST, chlorophyll concentration and Secchi disk depth lead to reduced oxygen content, and may affect other physical and biological processes as well as carbon sequestration in the Okhotsk Sea.


Okhotsk Sea Sea surface temperature Chlorophyll concentration Secchi disk depth Temporal changes 



The authors would like to thank the Ministry of Science and Technology of the Republic of China, Taiwan, for financially supporting this research under contract MOST 107-2611-M-110-006, 107-2611-M-110-021 and 107-2611-M-110-012 and the Ministry of Education (Higher Education Sprout Program) of Republic of China. Two anonymous reviewers provided constructive comments which strengthened the manuscript.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Chen-Tung Arthur Chen
    • 1
    Email author
  • Shujie Yu
    • 2
  • Ting-Hsuan Huang
    • 1
  • Yan Bai
    • 2
  • Xianqiang He
    • 2
  1. 1.Department of OceanographyNational Sun Yat-Sen UniversityKaohsiungTaiwan
  2. 2.State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of Oceanography, Ministry of Natural ResourcesHangzhouChina

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