An Enhanced Three-Band Index for Estimating Chlorophyll-a in Turbid Case-II Waters: Case Studies of Lake Kasumigaura, Japan, and Lake Dianchi, China
An Enhanced Three-Band Index for Estimating Chlorophyll-a in Turbid Case-II Waters: Case Studies of Lake Kasumigaura, Japan, and Lake Dianchi, China
复制标题
用于估算浑浊情况 II 水域中叶绿素 a 的增强型三波段指数：日本霞浦湖和中国滇池的案例研究
DOI：
10.1109/lgrs.2010.2044364
复制
发表时间：
2010-04
影响因子：
4.8
通讯作者：
Yang, Wei
中科院分区：
文献类型：
--
作者：
Chen, Jin;Ma, Ronghua;Fukushima, Takehiko;Matsushita, Bunkei;Yang, Wei
三波段指数被提出并成功地用于估算二类水体的叶绿素a浓度(Chl-a)。然而，这一指数在高度混浊的情况下显示出不确定性。为了解决这一问题，本研究提出了一种改进的三带索引。由于新的索引使用了与原始三波段索引相同的波段，因此它可以应用于中分辨率成像光谱仪(MERIS)数据。使用从两个浑浊的亚洲湖泊收集的数据来评估该指数的表现：日本的柏浦湖和中国的滇池。结果表明，增强三波段指数预测的Chl-a与实测值(R2>；0.83)高度相关，两湖的均方根误差(RMSE)和归一化均方根误差(NRMS)都有所降低(鹿儿湖的RMSE从13.97降至8.68 mg·m-3，NRMS从19.01%降至12.30%；滇池的RMSE从41.29降至15.28 mg·m-3，NRMS从35.83%降至21.34%)。这些发现意味着，如果有准确的大气校正的MERIS数据，即使在高度浑浊的第二类水域，增强的三波段指数也可以用于绘制Chl-a。
A three-band index was previously proposed and successfully utilized to estimate the chlorophyll-a concentration (Chl-a) in case-II waters. However, this index shows uncertainties in highly turbid situations. In this study, an enhanced three-band index is proposed to solve this problem. Since the new index employs bands that are identical to those of the original threeband index, it can be applied to Medium Resolution Imaging Spectrometer (MERIS) data. The performance of the index was evaluated using the data collected from two turbid Asian lakes: Lake Kasumigaura, Japan, and Lake Dianchi, China. The results showed that the Chl-a predicted by the enhanced threeband index was strongly correlated with the measured Chl-a (R2 > 0.83), and the root-mean-square error (rmse) and the normalized root-mean-square error (NRMS) were both reduced for the two lakes (for Lake Kasumigaura, rmse from 13.97 to 8.68 mg · m-3 and NRMS from 19.01% to 12.30%; for Lake Dianchi, rmse from 41.29 to 15.28 mg · m-3 and NRMS from 35.83% to 21.34%). These findings imply that, if accurately atmospheric-corrected MERIS data are available, the enhanced three-band index could be used for mapping Chl-a even in highly turbid case-II waters.
登录
查看更多内容
影响因子：
3.2
作者：
B. Matsushita;T. Fukushima
通讯作者：
B. Matsushita;T. Fukushima
影响因子：
13.5
作者：
Gitelson, Anatoly A.;Dall'Olmo, Giorgio;Holz, John
通讯作者：
Holz, John
影响因子：
1.9
作者：
Mobley, CD
通讯作者：
Mobley, CD
影响因子：
--
作者：
B. Matsushita;Wei Yang;Jin Chen;T. Fukushima
通讯作者：
B. Matsushita;Wei Yang;Jin Chen;T. Fukushima
影响因子：
13.5
作者：
Dall'Olmo, G;Gitelson, AA;Holz, JC
通讯作者：
Holz, JC