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Atlantic­Origin Cold Saline Water Intrusion and Shoaling of the Nutricline in the Pacific Arctic

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Title
Atlantic­Origin Cold Saline Water Intrusion and Shoaling of the Nutricline in the Pacific Arctic
Other Titles
태평양 북극해에서의 대서양 기원 저온고염수의 침입과 영양염 약층의 상승
Authors
Jung, Jinyoung
Cho, Kyoung-Ho
Park, Taewook
Yoshizawa, Eri
Lee, Youngju
Yang, Eun Jin
Gal, Jong-Ku
Ha, Sun-Yong
Kim, Soobin
Kang, Sung-Ho
Grebmeier, Jacqueline M.
Subject
Geology
Keywords
Atlantic-origin cold saline water; Pacific Arctic; Shoaling of the nutricline
Issue Date
2021-03
Citation
Jung, Jinyoung, et al. 2021. "Atlantic­Origin Cold Saline Water Intrusion and Shoaling of the Nutricline in the Pacific Arctic". GEOPHYSICAL RESEARCH LETTERS, 48(6): 1-10.
Abstract
Atlantic-origin cold saline water has previously not been considered an important contributor to the nutrient supply in the Pacific Arctic due to the effective insulation by the overlying Pacific-origin waters that separate the surface mixed layer from the deeper Atlantic Water. Based on hydrographic observations in the northwestern Chukchi Sea from 2015 to 2017, we demonstrate that the intrusion of Atlantic-origin cold saline water into the halocline boundary between Pacific and Atlantic-origin waters in 2017 lifted Pacific-origin nutrients up to the surface layer. We find that the cyclonic atmospheric circulation in 2017 was considerably strengthened, leading to lateral intrusions of two bodies of cold halocline water from the Eurasian marginal seas into the northwestern Chukchi Sea. Our results reveal that the intrusions of cold halocline waters caused unprecedented shoaling of the nutricline and anomalously high surface phytoplankton blooms in typically highly oligotrophic surface waters in the region during summer.
URI
https://repository.kopri.re.kr/handle/201206/11776
DOI
http://dx.doi.org/10.1029/2020GL090907
Appears in Collections  
2020-2020, Korea-Arctic Ocean Observing System(K-AOOS) (20-20) / Kang, Sung-Ho (PM20040)
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