An investigation into the phytoplankton package effect on the chlorophyll-a specific absorption coefficient in Barra Bonita reservoir, Brazil
An investigation into the phytoplankton package effect on the chlorophyll-a specific absorption coefficient in Barra Bonita reservoir, Brazil
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DOI：
10.1080/2150704x.2016.1185189
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发表时间：
2016-05
影响因子：
2.3
通讯作者：
E. Alcântara;F. Watanabe;T. Rodrigues;N. Bernardo
中科院分区：
文献类型：
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作者：
E. Alcântara;F. Watanabe;T. Rodrigues;N. Bernardo
本文研究了浮游植物包装对叶绿素a比吸收系数（a*phy）的影响。2014年5月和10月，在Barra Bonita（BB）水库进行了两次现场工作。在实地工作期间，取得了放射性样品和水样。根据辐射测量数据，计算了水体的遥感反射率（Rrs），并从水样中获得了叶绿素a（chl-a）浓度、浮游植物吸收系数（aphy）和a*phy系数。结果表明，对于第一次实地考察（5月），包装效果比在第二次实地考察（10月）感知。在5月，包装效应对于最高chl-a浓度（>200 mg m−3）更为明显，而在10月，所有263.20至797.80 mg m−3的样品都受到了影响。由于这种影响，当chl-a浓度高于300 mg m-3时，为了估计诸如BB水库的富营养环境中的chl-a浓度而开发的生物光学模型将面临更大的误差。
ABSTRACT In this article, a possible phytoplankton package effect on the chlorophyll-a specific absorption coefficient (a*phy) is investigated. Two fieldworks were conducted in May and October 2014 in Barra Bonita (BB) reservoir. During the fieldworks, radiometric and water samples were obtained. From the radiometric data, the remote sensing reflectance (Rrs) were calculated and from the water samples the chlorophyll-a (chl-a) concentration, the phytoplankton absorption coefficient (aphy) and a*phy coefficient were obtained. The results show that for the first fieldwork (in May), the package effect was less perceived than in the second fieldwork (in October). In May, the package effect was more pronounced for the highest chl-a concentration (>200 mg m−3) and for October all samples ranging from 263.20 to 797.80 mg m−3 were effected. Due to this effect, the bio-optical model development in order to estimate the chl-a concentration in a eutrophic environment such as the BB reservoir will face higher errors when the chl-a concentration were higher than 300 mg m−3.