Understanding the mechanisms of the interannual variability of phytoplankton in the Ulleung Basin, East Sea: A modeling study

Title
Understanding the mechanisms of the interannual variability of phytoplankton in the Ulleung Basin, East Sea: A modeling study
Author(s)
이순미; 유신재; 장찬주; Momme Butenschon
KIOST Author(s)
Jang, Chan Joo(장찬주)
Publication Year
2014-10-24
Abstract
We investigated the seasonal dynamics of phytoplankton responding to the changes in the mixed layer depth andatmospheric deposition in the Ulleung Basin for the years 2001-2012. To address the effect of vertical mixing andatmospheric deposition on interannual variability of phytoplankton communities, we used a zero-dimensionalEuropean Regional Seas Ecosystem Model (ERSEM). We compared the years of deep winter mixing with theyears of shallow winter mixing during the period. The model results showed that the deep winter mixing increasedthe nutrient supply to the upper layer. It led to a better growth of diatoms. On the other hands, the shallowwinter mixing advanced the initiation of spring blooms of diatoms because of enhanced light availability butreduced the production in spring by poor nutrient supply. Also the model indicated that the nutrient supply byatmospheric deposition controls the phytoplankton community in warm season. but it had little effect on regulatingthe phytoplankton blooms. These results suggest that in the Ulleung Basin, the balance between the verticalmixing and the atmospheric deposition process can induce a shift in phytoplankton communities. We discuss theimplication of this results in light of climate change and anthropogenic N production.position on interannual variability of phytoplankton communities, we used a zero-dimensionalEuropean Regional Seas Ecosystem Model (ERSEM). We compared the years of deep winter mixing with theyears of shallow winter mixing during the period. The model results showed that the deep winter mixing increasedthe nutrient supply to the upper layer. It led to a better growth of diatoms. On the other hands, the shallowwinter mixing advanced the initiation of spring blooms of diatoms because of enhanced light availability butreduced the production in spring by poor nutrient supply. Also the model indicated that the nutrient supply byatmospheric deposition controls the phytoplankton community in warm season. but it had little effect on regulatingthe phytoplankton blooms. These results suggest that in the Ulleung Basin, the balance between the verticalmixing and the atmospheric deposition process can induce a shift in phytoplankton communities. We discuss theimplication of this results in light of climate change and anthropogenic N production.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25910
Bibliographic Citation
PICES annual meeting, pp.44, 2014
Publisher
PICES
Type
Conference
Language
English
Publisher
PICES
Related Researcher
Research Interests

upper ocean dynamics,regional climate modeling,ocean climate change,해양상층역학,지역기후모델링,해양기후변화

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