摘要
海表叶绿素的反演及其时空变化分析,在海洋-大气系统的碳循环、赤潮灾害监测等方面具有重要意义。本文选择海南岛西南海域作为研究区,采用MODIS 250 m分辨率数据,基于研究区内最优算法模型,反演研究区内叶绿素浓度。基于该模型反演结果,采用相同点位变化曲线以及差值图像等方法对叶绿素浓度进行年间和季节的时空变化分析。分析结果显示,空间上,由近岸到深海,由高纬度到低纬度,叶绿素浓度均呈现逐渐下降的趋势;时间上,整体呈现出逐年下降的趋势。结果表明,海洋叶绿素浓度受人类活动影响较大,同时也受到洋流、温度、陆地生物以及河流的较大影响。
The retrieval of marine surface chlorophyll and its spatial-temporal changes have important significance in the carbon cycle of ocean-atmosphere system and the monitoring of the red tide. This paper selects the ocean southwest of Hainan island as the study area. The MODIS 250 m resolution data is used to study the spatial-temporal variations of chlorophyll concentration based on the optimal algorithm model. Based on the model results, the spatial-temporal variations of chlorophyll concentration, in annual and quarterly time scales, were analyzed using the curves of same points and difference image method. The chlorophyll concentration presents the trend of gradual decline from near shore to open sea, from the high latitude to the low latitude. The overall chlorophyll concentration presents a downward trend year by year. The results show that the ocean chlorophyll concentration is greatly influenced by human activities, but also greatly affected by ocean currents, temperature, terrestrial biota and rivers.
作者
范宪创
郑新
李李漫丝
周超
陆天启
FAN Xianchuang;ZHENG Xin;LI Limansi;ZHOU Chao;LU Tianqi(College of Information Engineering,North China University of Science and Technology,Hebei,Tangshan 063210,China;College of GeoExploration Science and Technology,Jilin University,Jilin,Changchun 130026,China;National Marine Environmental Mon让oring Center,Liaoning,Dalian 116023,China)
出处
《海洋湖沼通报》
CSCD
北大核心
2019年第5期156-163,共8页
Transactions of Oceanology and Limnology
基金
华北理工大学青年重点基金项目(Z201718)资助
关键词
定量反演
MODIS数据
叶绿素
时空变化
remote sensing quantitative retrieval
MODIS data
chlorophyll
spatial-temporal variation
