Influence of mixed layer depth on chlorophyll-a concentration in the Southern Ocean

作     者：Yuxin Shi Hailong Liu Quanan Zheng 

作者机构：School of OceanographyShanghai Jiao Tong UniversityShanghai 200240China Yunnan Key Laboratory of Meteorological Disasters and Climate Resources in the Greater Mekong SubregionYunnan UniversityKunming 600650China Department of Atmospheric and Oceanic ScienceUniversity of Maryland at College ParkCollege Park 20742USA 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2024年第43卷第10期

页      面：16-32页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 0713[理学-生态学] 

基　　金：The fund from Ministry of Science and Technology of the People’s Republic of China under contract No.2023YFF0805204 the Natural Science Foundation of Yunnan Province under contract No.202302AN360006 the National Natural Science Foundation of China under contract No.41776019 

主　　题：mixed layer depth entrainment chlorophyll-a concentration Southern Ocean 

摘      要：The element iron limitation is one of the crucial factors contributing to high nutrient low chlorophyll in the Southern Ocean(SO).Mixed layer dynamics regulate the availability of iron to *** this paper,we investigate the influence of surface iron supplementation triggered by the mixed layer depth(MLD)variation on chlorophyll-a(Chl-a)concentration in the SO on seasonal and interannual *** analysis is based on the Biogeochemical Southern Ocean State Estimate for the period from 2013 to *** provide a comprehensive and systematic mapping of the regions within the SO,where Chl-a is affected by iron input related to MLD *** relationship between the MLD and the Chl-a varies with the latitude on the seasonal time *** the MLD and sea ice melting affect the distribution of *** the interannual scale,iron supply due to MLD deepening occurs primarily north of 60°*** advection-induced entrainment enhances the surface iron input during the austral summer,which favors Chl-a *** addition to the MLD,the melting of sea ice and cooling of the sea surface can also alter iron input and subsequently affect Chl-a distribution in the austral *** the austral winter,entrainment can boost iron stocks,stimulating a subsequent spring increase of Chl-a in the ***,sea surface temperature declines during the austral winter,promoting an increased iron supply and creating favorable conditions for the subsequent spring Chl-a increase in the SO.