气候变化领域集成服务门户(CCPortal): Seasonal Stages of Chlorophyll-a Vertical Distribution and Its Relation to the Light Conditions in the Black Sea From Bio-Argo Measurements

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DOI	10.1029/2020JC016790
	Seasonal Stages of Chlorophyll-a Vertical Distribution and Its Relation to the Light Conditions in the Black Sea From Bio-Argo Measurements
	Kubryakov A.A.; Mikaelyan A.S.; Stanichny S.V.; Kubryakova E.A.
发表日期	2020
ISSN	21699275
卷号	125 期号:12
英文摘要	The year-to-year seasonal variability of the vertical distribution of concentration of chlorophyll-a (Chla) in the Black Sea, its relation to light (photosynthetically available irradiance [PAR]), and mixing conditions were studied based on the 6-year (2014–2019) measurements of Bio-Argo floats. Variations in PAR caused by changes in incoming solar radiation and light attenuation determine the position of the deep chlorophyll maximum (DCM). During all seasons, the DCM was located between isolume of daily integrated PAR of 0.080 and 10.0 mole photons m−2 d−1. Analysis of Bio-Argo data allowed to distinguish seven different stages of Chla seasonal variability. In February, the minimum of Chla in the entire water column was often observed in areas with a deep mixed layer (Stage 1), followed by the March early spring peak, occupying both the mixed layer and the seasonal thermocline (Stage 2). In April–May, Chla decreased throughout the 0–40 m layer, which was accompanied by the maximum in light penetration and an increase in Chla in the deepest layers (Stage 3). In summer, two deep peaks of Chla were distinguished: the first, a thin and shallow peak in June, and the second, a large and deeper peak in August (Stage 4 and 5). The August peak was followed by the deepest seasonal minimum of Chla in September–October, coincided with the autumn rise of the zooplankton biomass (Stage 6). Autumn–winter convection in November–January led to the third seasonal peak of Chla (Stage 7). The study discusses the role of various abiotic and biotic factors in the formation of each of these stages. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Bio-Argo; Black Sea; chlorophyll; irradiance; light attenuation; seasonal variability
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186574
作者单位	Marine Hydrophysical Institute, Russian Academy of Sciences, Sevastopol, Russian Federation; Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russian Federation
推荐引用方式 GB/T 7714	Kubryakov A.A.,Mikaelyan A.S.,Stanichny S.V.,et al. Seasonal Stages of Chlorophyll-a Vertical Distribution and Its Relation to the Light Conditions in the Black Sea From Bio-Argo Measurements[J],2020,125(12).
APA	Kubryakov A.A.,Mikaelyan A.S.,Stanichny S.V.,&Kubryakova E.A..(2020).Seasonal Stages of Chlorophyll-a Vertical Distribution and Its Relation to the Light Conditions in the Black Sea From Bio-Argo Measurements.Journal of Geophysical Research: Oceans,125(12).
MLA	Kubryakov A.A.,et al."Seasonal Stages of Chlorophyll-a Vertical Distribution and Its Relation to the Light Conditions in the Black Sea From Bio-Argo Measurements".Journal of Geophysical Research: Oceans 125.12(2020).