Factors affecting the subsurface aragonite undersaturation layer in the Pacific Arctic region

Ahra Mo, Dongseon Kim, Eun Jin Yang, Jinyoung Jung, Young Ho Ko, Sung Ho Kang, Kyoung Ho Cho, Keyhong Park, Tae Wook Kim

Research output: Contribution to journalArticlepeer-review

Abstract

This study evaluated interannual variation in the subsurface aragonite undersaturation zone (ΩAr<1 layer) in the Pacific Arctic Ocean, using data from the 2016–2019 period. The upper boundary (DEPΩ<1UB) of the ΩAr<1 layer generally formed at a depth where the contribution of corrosive Pacific water was approximately 98 %. The intensity of the Beaufort Gyre associated with freshwater accumulation mainly determined interannual variation in DEPΩ<1UB, but the direction of its effect was opposite west and east of ~166°W. The lower boundary (DEPΩ<1LB) of the ΩAr<1 layer was generally found at a depth range where equal contributions of Pacific and Atlantic water were expected. An Atlantic-origin cold saline water intrusion event in 2017 caused by an anomalous atmospheric circulation pattern significantly lifted the DEPΩ<1LB, thus the thickness of the ΩAr<1 layer decreased.

Original languageEnglish
Article number114060
JournalMarine Pollution Bulletin
Volume183
DOIs
Publication statusPublished - 2022 Oct

Bibliographical note

Funding Information:
This work was supported by the Polar Academic Program (PE179000) funded by the Korea Polar Research Institute , the project “‘Korea-Arctic Ocean Warming and Response of Ecosystem (K-AWARE)’, KOPRI, 20210605” funded by the Ministry of Oceans and Fisheries , South Korea, and the Basic Science Research Program ( 2019R1A2C2089994 ) funded by the National Research Foundation of Korea . All data used in this study are available through the Korea Arctic Ocean-data System ( https://kaos.kopri.re.kr/ ).

Funding Information:
This work was supported by the Polar Academic Program (PE179000) funded by the Korea Polar Research Institute, the project “‘Korea-Arctic Ocean Warming and Response of Ecosystem (K-AWARE)’, KOPRI, 20210605” funded by the Ministry of Oceans and Fisheries, South Korea, and the Basic Science Research Program (2019R1A2C2089994) funded by the National Research Foundation of Korea. All data used in this study are available through the Korea Arctic Ocean-data System (https://kaos.kopri.re.kr/).

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Aragonite saturation
  • Arctic Ocean
  • Atmospheric circulation
  • Beaufort gyre
  • Ocean acidification
  • Pacific-Arctic regions

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Pollution

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