| 利用MODIS影像提取太湖蓝藻水华的尺度差异性分析 |
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| 引用本文： | 尚琳琳,马荣华,段洪涛,姜广甲,周琳.利用MODIS影像提取太湖蓝藻水华的尺度差异性分析[J].湖泊科学,2011,23(6):847-854. |
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| 作者姓名： | 尚琳琳 马荣华 段洪涛 姜广甲 周琳 |
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| 作者单位： | 1. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京210008;中国科学院研究生院,北京100049
2. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程重要方向性项目，国家自然科学基金，国家水体污染控制与治理科技重大专项项目 |
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| 摘 要： | 有效地提取蓝藻水华信息对分析蓝藻动态分布有重要意义,然而低空间分辨率数据提取的蓝藻水华会产生尺度误差.本文以太湖为研究区,利用2005年10月17日和2010年12月3日两景MODIS(250和500m)数据,采用浮游藻类指数(FAI)法提取太湖蓝藻水华面积;通过将FAI50均值化为FAImean(500 m),然后与...
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| 关 键 词： | 蓝藻水华 FAI 太湖 遥感 MODIS 尺度 |
| 收稿时间： | 2010/12/20 0:00:00 |
| 修稿时间： | 2011/5/15 0:00:00 |
Scale analysis of cyanobacteria bloom in Lake Taihu from MODIS observations |
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| SHANG Linlin,MA Ronghu,DUAN Hongtao,JIANG Guangjia and ZHOU Lin.Scale analysis of cyanobacteria bloom in Lake Taihu from MODIS observations[J].Journal of Lake Science,2011,23(6):847-854. |
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| Authors: | SHANG Linlin MA Ronghu DUAN Hongtao JIANG Guangjia and ZHOU Lin |
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| Institution: | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R.China,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China and Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R.China |
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| Abstract: | In order to study the spatio-temporal patterns of cyanobacteria blooms, it is important to detect and monitor them effec-tively by satellite observations.However, such detection and monitoring by low resolution data induces a scaling bias.Based on MODIS(250 m and 500 m) data at Oct.17, 2005 and Dec.3, 2010, the area of cyanobacteria bloom in Lake Taihu was derived by a approach named Floating Algae Index (FAI).The low resolution FAI was then achieved in two ways:FAI500, was directly calcu-lated from MODIS(500 m);and the FAImean was the mean of FAI250 which was directly calculated from MODIS(250 m).Results reveal a serious overestimation of FAI500 and the area of cyanobacteria bloom due to the scale error all over Lake Taihu.The causes for scaling error are discussed and it is found that the spatial heterogeneous is the key factor which may lead to the error in the de-tection and monitoring on cyanobacteria bloom. |
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| Keywords: | Cyanobacteria bloom FAI Lake Taihu remote sensing MODIS scale |
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