Parameterization of Light Absorption of Phytoplankton, Non-Algal Particles and Coloured Dissolved Organic Matter in the Atlantic Region of the Southern Ocean (Austral Summer of 2020)

被引：6

作者：

Churilova, Tatiana ^{[1
]}

Moiseeva, Natalia ^{[1
]}

Skorokhod, Elena ^{[1
]}

Efimova, Tatiana ^{[1
]}

Buchelnikov, Anatoly ^{[1
,2
]}

Artemiev, Vladimir ^{[3
]}

Salyuk, Pavel ^{[4
]}

机构：

[1] Russian Acad Sci, AO Kovalevsky Inst Biol Southern Seas, Sevastopol 299011, Russia

[2] Sevastopol State Univ, Lab Mol & Cellular Biophys, Sevastopol 299053, Russia

[3] Russian Acad Sci, Shirshov Inst Oceanol, Moscow 117997, Russia

[4] Russian Acad Sci, VI Ilichev Pacific Oceanol Inst, Far Eastern Branch, Vladivostok 690041, Russia

来源：

REMOTE SENSING | 2023年 / 15卷 / 03期

基金：

俄罗斯科学基金会;

关键词：

chlorophyll a; light absorption; phytoplankton; non-algal particles; coloured dissolved organic matter; remote sensing; Southern Ocean; NORTHERN ANTARCTIC PENINSULA; CHLOROPHYLL-A CONCENTRATION; BRANSFIELD STRAIT; WATERS; ALGORITHMS; PIGMENTS; COEFFICIENTS; VARIABILITY; PHOTOSYNTHESIS; FLUORESCENCE;

D O I：

10.3390/rs15030634

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Climate affects the characteristics of the Southern Ocean ecosystem, including bio-optical properties. Remote sensing is a suitable approach for monitoring a rapidly changing ecosystem. Correct remote assessment can be implemented based on a regional satellite algorithm, which requires parameterization of light absorption by all optically active components. The aim of this study is to analyse variability in total chlorophyll a concentration (TChl-a), light absorption by phytoplankton, non-algal particles (NAP), coloured dissolved organic matter (CDOM), and coloured detrital matter (CDM = CDOM+NAP), to parameterize absorption by all components. Bio-optical properties were measured in the austral summer of 2020 according to NASA Protocols (2018). High variability (1-2 orders of magnitude) in TChl-a, absorption of phytoplankton, NAP, CDOM, and CDM was revealed. High variability in both CDOM absorption (uncorrelated with TChl-a) and CDOM share in total non-water absorption, resulting in a shift from phytoplankton to CDOM dominance, caused approximately twofold chlorophyll underestimation by global bio-optical algorithms. The light absorption of phytoplankton (for the visible domain in 1 nm steps), NAP, CDOM, and CDM were parametrized. Relationships between the spectral slope coefficient (S-CDOM/S-CDM) and CDOM (CDM) absorption were revealed. These results can be useful for the development of regional algorithms for Chl-a, CDM, and CDOM monitoring in the Southern Ocean.

引用

页数：24

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