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Fluorescence-based approach to estimate the chlorophyll-a concentration of a phytoplankton bloom in Ardley Cove (Antarctica)

Citation

Zeng, C and Zeng, T and Fischer, AM and Xu, H, Fluorescence-based approach to estimate the chlorophyll-a concentration of a phytoplankton bloom in Ardley Cove (Antarctica), Remote Sensing, 9, (3) Article 210. ISSN 2072-4292 (2017) [Refereed Article]


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Copyright Statement

Copyright 2017 The Author(s) Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/rs9030210

Abstract

A phytoplankton bloom occurred in Ardley Cove, King George Island in January 2016, during which maximum chlorophyll-a reached 9.87 mg/m3. Records show that blooms have previously not occurred in this area prior to 2010 and the average chlorophyll-a concentration between 1991 and 2009 was less than 2 mg/m3. Given the lack of in situ measurements and the poor performance of satellite algorithms in the Southern Ocean and Antarctic waters, we validate and assess several chlorophyll-a algorithms and apply an improved baseline fluorescence approach to examine this bloom event. In situ water properties including in vivo fluorescence, water leaving radiance, and solar irradiance were collected to evaluate satellite algorithms and characterize chlorophyll-a concentration, as well as dominant phytoplankton groups. The results validated the nFLH fluorescence baseline approach, resulting in a good agreement at this high latitude, high chlorophyll-a region with correlation at 59.46%. The dominant phytoplankton group within the bloom was micro-phytoplankton, occupying 79.58% of the total phytoplankton community. Increasing sea ice coverage and sea ice concentration are likely responsible for increasing phytoplankton blooms in the recent decade. Given the profound influence of climate change on sea-ice and phytoplankton dynamics in the region, it is imperative to develop accurate methods of estimating the spatial distribution and concentrations of the increasing occurrence of bloom events.

Item Details

Item Type:Refereed Article
Keywords:chlorophyll-a estimation, fluorescence approach, King George Island, phytoplankton bloom
Research Division:Engineering
Research Group:Geomatic Engineering
Research Field:Photogrammetry and Remote Sensing
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Coastal and Estuarine Flora, Fauna and Biodiversity
Author:Fischer, AM (Dr Andy Fischer)
ID Code:114818
Year Published:2017
Deposited By:Centre for Ecology and Biodiversity
Deposited On:2017-02-28
Last Modified:2017-11-15
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