| 引用本文: | 朱晶晶,陈晋,王胜强,杨伟,松下文经.基于MERIS数据的滇池叶绿素浓度时空变化(2003-2009年)及趋势.湖泊科学,2011,23(4):581-590. DOI:10.18307/2011.0414 |
| ZHU Jingjing,CHEN Jin,WANG Shengqiang,YANG Wei,MATSUSHITA Bunkei.Spatial-temporal variation of chlorophyll-a concentration in Lake Dianchi from 2003 to 2009 and trend analysis based on MERIS data. J. Lake Sci.2011,23(4):581-590. DOI:10.18307/2011.0414 |
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| 摘要: |
| 基于多时相MERIS数据, 本文对滇池叶绿素a浓度的时空变化趋势进行了研究.以野外实测数据为基础, 对应用较好的三种叶绿素a浓度反演模型进行了验证比较, 通过精度评价和误差分析选择最优的三波段模型;将其应用到经过几何纠正和大气纠正等预处理后的MERIS数据系列, 得到2003-2009年时间序列下的57幅滇池叶绿素a浓度分布图.分析结果表明, 在2003-2009年间, 滇池叶绿素a浓度总体呈周期性波动缓慢上升趋势, 每年2-3月浓度最低, 4-11月较快上升达到峰值, 12-1月开始回落;空间分布上, 叶绿素a浓度高值区多出现在滇池北部、岸边带等靠近城镇的人口聚集区域, 且浓度越高的季节, 空间分布差异越显著。 |
| 关键词: 叶绿素a 时空变化 滇池 MERIS数据 三波段模型 |
| DOI：10.18307/2011.0414 |
| 分类号: |
| 基金项目:国家自然科学基金项目(40871162)资助 |
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| Spatial-temporal variation of chlorophyll-a concentration in Lake Dianchi from 2003 to 2009 and trend analysis based on MERIS data |
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ZHU Jingjing1, CHEN Jin1, WANG Shengqiang1, YANG Wei1,2, MATSUSHITA Bunkei2
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1.State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, P.R.China;2.Department of Geography, Tsukuba University, Tsukuba 305-8572, Japan
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| Abstract: |
| Spatial-temporal variation trends of Chlorophyll-a concentration in Lake Dianchi were analyzed based on MERIS data.First,three popular retrieval algorithms of Chlorophyll-a concentration were calibrated by field measurements.It was found that three-band model was the best one with higher estimation accuracy.Then, the optimized three-band model was applied to 57 MER-IS images from 2003 to 2009 which were pre-processed through geometric correction,atmospheric correction,etc.At last,a series of maps about Chlorophyll-a concentration distribution of Lake Dianchi were produced.The result showed that Chlorophyll-a con-centration was rising slowly with a periodic fluctuation in Lake Dianchi.During a year,Chlorophyll-a concentration showed a de-creasing-increasing-decreasing pattern,where the minimum appeared in February and March,and the maximum occurred within September and November.Regarding to spatial distribution,Chlorophyll-a concentration was higher at the edge and the north of Lake Dianchi,which are close to the Kunming city and small towns.In addition,the higher Chlorophyll-a concentration was,the more obvious the spatial variation was. |
| Key words: Chlorophyll-a spatial-temporal variation Lake Dianchi MERIS data three-band model |
