【摘要】 综合利用环境卫星(HJ-1A/1B)数据与MODIS数据,采用NDVI(归一化植被指数)和人工辅助判读方法,针对2015年黄海浒苔爆发过程进行遥感监测,并分析台风"灿鸿"过境对浒苔生长过程及漂移路径的影响。结果表明:(1)5月10日浒苔最早在江苏盐城东部海域监测到,面积仅有0.831km~2,然后,在东南季风的作用下由南向北逐渐漂移至山东青岛海域,影响面积逐渐扩大;6月下旬覆盖面积达到最大1 752.756km~2;7、8月份浒苔逐渐消退,并在朝鲜南部海湾发现面积达38.791km~2的浒苔分布。黄海海域浒苔经历了"出现—发展—爆发—衰退—消亡"过程;(2)台风"灿鸿"一定程度上改变了浒苔继续北上的路径,整体向西南漂移,致使浒苔中心南移至连云港东部海域,并推测有部分浒苔漂移至朝鲜南部海湾;(3)从监测数据看,MODIS和环境卫星(HJ-1A/1B)两个数据源空间分辨率差异明显,分辨率分别为250 m和30 m,其监测浒苔面积相差约2.26倍,通过建立二者的函数关系,弥补了环境数据短缺现象。更多还原

【Abstract】 A recurrent floating green algae bloom was detected in the Yellow Sea since 2007.The Ulva.prolifera is non-toxic,but the massive accumulations can result in significant environmental damage and cause economic loss to marine industries.In this study,the spatial and temporal patterns of Ulva.prolifera green tides were investigated in the Yellow Sea during 2015 using HJ-1 A/1 Band MODIS satellite images by means of NDVI(normalized difference vegetation index)and artificial interpretation.The results showed:(1)A little Ulva.prolifera was discovered firstly in adjacent sea of Yancheng,Jiangsu province in early May with distribution area 0.831 km~2.Under the action of the southeast monsoon,Ulva.prolifera was gradually drifted to Shandong peninsula waters from south to north.The influential area and range reached a peak value with 1 752.756 km~2 in late June,and gradually subsided from July to August.And Ulva.prolifera about 38.791 km~2 was monitored in the South Bay of North Korea.In conclusion,Ulva.prolifera in the Yellow Sea in 2015 has experienced five major processes including "Occur-Development-Outbreak-Recession-Disappeared".(2)Typhoon "CHAN-HOM" certainly influenced the northward pathway of Ulva.prolifera and shifted towards the southwest,resulting in most of Ulva.prolifera moved to the east coast of Lianyungang,and speculated that minority Ulva.prolifera drifted to the South Bay of North Korea.(3)From the monitoring data,the spatial resolution between MODIS and ENVISAT(HJ-1 A/1 B)is difference significantly,250 mand 30 mrespectively.A functional relation of the two data with monitoring area difference about 2.26 times was established to make up for the shortage of the environmental satellite(HJ-1 A/1 B)images.更多还原