摘要
为了研究如何有效应用MODIS荧光高度(fluorescence line height,FLH)产品于近岸水华监测,基于福建近岸浮游植物水华期获得的35组实测遥感反射率和叶绿素a数据,提出MODIS FLH差值法,即当日FLH与前14 d平均FLH差值≥0.06 mW/(cm2.μm.sr)时,判别为水华发生.取2005年6月和2003年5月两个赤潮案例,处理获得MO-DIS卫星FLH时间差值产品,依据FLH差值≥0.06 mW/(cm2.μm.sr)的判据,判别水华影响区域与实际报道吻合,说明这一方法对于本研究水体行之有效.适用其他水体的情况尚未知,且具体的判据可能随水域而变化,进一步的研究与实例检验将是必要的.
In order to overcome the shortcomings of using empirically derived chlorophyll a （Chl a） and MODIS fluorescence lineheight （FLH） in bloom detection, we propose a method to use FLH difference between a single image and the 14 days mean FLH prior to this image to detect blooms. When the FLH variation at a pixel is ≥0.06 mW/（cm^2 ·μm· st） ,this pixel is judged as a blooming pixel. The criteria is determined based on an in situ dataset of 35 groups of remote sensing reflectance and Chl a collected in the Fujian coastal water where harmful algal blooms occurred. When applying this approach to MODIS FLH from space, the areas judged as blooming water in May 2003 and June 2005 are consistent with in situ observations,demonstrating the effectiveness of this approach in Fujian coastal water. Further studies of the method and more test cases are nevertheless required.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第5期903-908,共6页
Journal of Xiamen University：Natural Science
基金
国家高技术研究发展计划(863)项目(2006AA09A302
2008AA09Z108)
关键词
赤潮
遥感
荧光高度
MODIS
phytoplankton bloom
remote sensing
fluorescence
MODIS
