研究者詳細 - 相木　秀則

©2018. American Geophysical Union. All Rights Reserved. A lower trophic ecosystem model coupled with a one-dimensional physical turbulence closure model was applied to study phytoplankton dynamics and spring bloom initiation in mesoscale anticyclonic eddies (AEs) and cyclonic eddies (CEs). The model simulated ecosystem dynamics between nutrient-phytoplankton-zooplankton-detritus in AEs and CEs, while the physical model provided the seasonal cycle of convective turbulent mixing. The study was motivated by earlier work based on satellite and ship observations, which showed earlier initiation of the spring blooms in CEs with shallow mixed-layer depths than in AEs with deeper mixed-layer depths. The model results supported the hypothesis that mixed-layer depths in eddies play an important role in the dynamics of the spring bloom initiation. Model results revealed that in AEs convective mixing causes light limitation for phytoplankton growth due to deep winter mixing, and the bloom initiation is delayed until relaxation of turbulent convective mixing. Conversely, in the shallow mixed-layer CEs, blooms initiate before the end of convective mixing due to early improvement in light conditions following the increase in solar radiation. Furthermore, the model showed that the relaxation in zooplankton grazing for the deep mixing contributed to weak winter phytoplankton accumulation in AE, while winter phytoplankton accumulation was faster in the shallow mixed-layer CE. Overall, the initiation mechanism and the dynamics of the spring phytoplankton blooms are different for AEs and CEs. Therefore, we suggest that, in many parts of the global ocean, eddies play an important role regulating the dynamics of phytoplankton blooms.

DOI： 10.1029/2018JC014089

Web of Science

Scopus

Impact of cyclonic eddies and typhoons on biogeochemistry in the oligotrophic ocean based on biogeochemical/physical/meteorological time-series at station KEO 査読有り

Honda, MC; Sasai, Y; Siswanto, E; Kuwano-Yoshida, A; Aiki, H; Cronin, MF

PROGRESS IN EARTH AND PLANETARY SCIENCE 5 巻 2018年8月

Impacts of SST Patterns on Rapid Intensification of Typhoon Megi (2010) 査読有り

Kanada, S; Tsujino, S; Aiki, H; Yoshioka, MK; Miyazawa, Y; Tsuboki, K; Takayabu, I

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122 巻 ( 24 ) 頁： 13245 - 13262 2017年12月

Mesoscale Eddies Control the Timing of Spring Phytoplankton Blooms: A Case Study in the Japan Sea 査読有り

Maúre, ER; Ishizaka, J; Sukigara, C; Mino, Y; Aiki, H; Matsuno, T; Tomita, H; Goes, JI; Gomes, HR

GEOPHYSICAL RESEARCH LETTERS 44 巻 ( 21 ) 頁： 11115 - 11124 2017年11月

Comments on "A Combined Derivation of the Integrated and Vertically Resolved, Coupled Wave-Current Equations" 査読有り

Ardhuin, F; Suzuki, N; McWilliams, JC; Aiki, H

JOURNAL OF PHYSICAL OCEANOGRAPHY 47 巻 ( 9 ) 頁： 2377 - 2385 2017年9月

Future Enhancement of Heavy Rainfall Events Associated with a Typhoon in the Midlatitude Regions 査読有り

Kanada, S; Tsuboki, K; Aiki, H; Tsujino, S; Takayabu, I

SOLA 13 巻頁： 246 - 251 2017年

A Divergence-Form Wave-Induced Pressure Inherent in the Extension of the Eliassen-Palm Theory to a Three-Dimensional Framework for All Waves at All Latitudes 査読有り

Aiki Hidenori, Takaya Koutarou, Greatbatch Richard J.

JOURNAL OF THE ATMOSPHERIC SCIENCES 72 巻 ( 7 ) 頁： 2822-2849 2015年7月

A New Expression for the Form Stress Term in the Vertically Lagrangian Mean Framework for the Effect of Surface Waves on the Upper- Ocean Circulation 査読有り

Aiki Hidenori, Greatbatch Richard J.

JOURNAL OF PHYSICAL OCEANOGRAPHY 44 巻 ( 1 ) 頁： 3-23 2014年1月

Editorial-the 4th International Workshop on Modeling the Ocean (IWMO 2012) 査読有り

Oey Lie-Yauw, Miyazawa Yasumasa, Aiki Hidenori, Masumoto Yukio, Ezer Tal, Waseda Takuji

OCEAN DYNAMICS 63 巻 ( 11-12 ) 頁： 1345-1347 2013年12月

Layering and turbulence surrounding an anticyclonic oceanic vortex: in situ observations and quasi-geostrophic numerical simulations 査読有り

Hua Bach Lien, Menesguen Claire, Le Gentil Sylvie, Schopp Richard, Marsset Bruno, Aiki Hidenori

JOURNAL OF FLUID MECHANICS 731 巻 2013年9月

The Vertical Structure of the Surface Wave Radiation Stress for Circulation over a Sloping Bottom as Given by Thickness-Weighted-Mean Theory 査読有り

Aiki Hidenori, Greatbatch Richard J.

JOURNAL OF PHYSICAL OCEANOGRAPHY 43 巻 ( 1 ) 頁： 149-164 2013年1月

Thickness-Weighted Mean Theory for the Effect of Surface Gravity Waves on Mean Flows in the Upper Ocean 査読有り

Aiki Hidenori, Greatbatch Richard J.

JOURNAL OF PHYSICAL OCEANOGRAPHY 42 巻 ( 5 ) 頁： 725-747 2012年5月

　前のページ - 次のページ　

<相木 秀則>

論文 - 相木 秀則

<相木　秀則>

論文 - 相木　秀則