A new approach to discriminate dinoflagellate from diatom blooms from space in the East China Sea
A new approach to discriminate dinoflagellate from diatom blooms from space in the East China Sea
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从东海太空区分甲藻和硅藻华的新方法
DOI：
10.1002/2014jc009876
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发表时间：
2014-07
影响因子：
3.6
通讯作者：
Shang, Shaoping
中科院分区：
文献类型：
--
作者：
Shang, Shaoling;Wu, Jingyu;Huang, Bangqin;Lin, Gong;Lee, Zhongping;Liu, James;Shang, Shaoping
东海区甲藻和硅藻的水华在春、夏季经常发生。一些甲藻水华是有毒的，导致广泛的经济损失。为了减轻水华的负面影响，遥感方法，可以有效地和准确地区分水华类型的早期预警和持续监测的大尺度水华事件的需求。从硅藻和甲藻水华沃茨采集的原位生物光学数据表明，这两种类型的水华在遥感反射率（Rrs）的形状和大小上表现出明显的差异。在两个光谱范围（443-488和531-555 nm，波段可与中等分辨率成像光谱仪（MODIS）传感器），简称为BI（代表水华指数），在现场测量Rrs光谱斜率的比率，发现有效区分甲藻硅藻。反射率模型模拟，这是进行使用原位和藻类培养数据作为输入，提供了一致的结果。在ECS中，当荧光线高度（FLH）比背景高一倍且443 nm处的总吸收系数≥ 0.5 m−1时，如果0.0 < BI ≤ 0.3，则表明甲藻水华;如果0.3 < BI ≤ 1.0，则表明硅藻水华。最后，该方法被应用到MODIS测量的ECS，并成功地确定了一系列的硅藻和甲藻水华事件在2005年和2011年4月至6月，表明该方法是普遍有效的ECS。
Dinoflagellate and diatom blooms often occur in the East China Sea (ECS) during spring and summer. Some of the dinoflagellate blooms are toxic, resulting in widespread economic damage. In order to mitigate the negative impacts, remote-sensing methods that can effectively and accurately discriminate between bloom types are demanded for early warning and continuous monitoring of bloom events at large scales. An in situ bio-optical data set collected from diatom and dinoflagellate blooming waters indicates that the two types of blooms exhibited distinctive differences in the shapes and magnitudes of remote-sensing reflectance (Rrs). The ratio of in situ measured Rrs spectral slopes at two spectral ranges (443–488 and 531–555 nm, bands available with the moderate resolution imaging spectrometer (MODIS) sensor), abbreviated as BI (representing bloom index), was found effective in differentiating dinoflagellates from diatoms. Reflectance model simulations, which were carried out using in situ and algal culture data as input, provided consistent results. A classification approach for separating dinoflagellate from diatom blooms in the ECS was then developed: When fluorescence line height (FLH) is doubled over the background level and total absorption coefficient at 443 nm ≥ 0.5 m−1, if 0.0 < BI ≤ 0.3, it suggests a dinoflagellate bloom; if 0.3 < BI ≤ 1.0, it suggests a diatom bloom. Finally, the approach was applied to MODIS measurements over the ECS, and a series of diatom and dinoflagellate bloom events during April–June 2005 and 2011 were successfully identified, suggesting that the proposed approach is generally valid for the ECS.
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影响因子：
3.4
作者：
Dongzhi Zhao;X. Xing;Yuguang Liu;Jianhong Yang;Lin Wang
通讯作者：
Dongzhi Zhao;X. Xing;Yuguang Liu;Jianhong Yang;Lin Wang
影响因子：
4.5
作者：
CARDER, KL;STEWARD, RG
通讯作者：
STEWARD, RG
MODIS 观测台湾海峡浮游植物动态：基于吸收的分析
影响因子：
4.9
作者：
Shang, S.;Dong, Q.;Lee, Z.;Li, Y.;Xie, Y.;Behrenfeld, M.
通讯作者：
Behrenfeld, M.
影响因子：
3.6
作者：
Morel, A;Maritorena, S
通讯作者：
Maritorena, S
影响因子：
3.6
作者：
MOREL, A
通讯作者：
MOREL, A