CAJ | 학술논문

基于MODIS 1B数据,根据归一化植被指数(NDVI)及假彩色合成图,设置动态阈值提取黄海海域浒苔信息,并对其时空分布特征进行了研究,结果显示：2013年黄海海域浒苔5月底开始出现,一直持续到8月上中旬。其中6月上旬是浒苔的发展期,浒苔面积、影响范围较大,相对聚集密度有所增加,此时浒苔主要分布在外海；6月中旬是浒苔的爆发期,浒苔面积和影响范围均达到最大值,6月下旬浒苔开始进入衰退期,浒苔面积、影响范围均缩小,相对聚集密度的峰值出现在该时期；8月初仅有少量浒苔漂浮在近海地带,8月21日浒苔全部消失。
기우MODIS 1B수거,근거귀일화식피지수(NDVI)급가채색합성도,설치동태역치제취황해해역호태신식,병대기시공분포특정진행료연구,결과현시：2013년황해해역호태5월저개시출현,일직지속도8월상중순。기중6월상순시호태적발전기,호태면적、영향범위교대,상대취집밀도유소증가,차시호태주요분포재외해；6월중순시호태적폭발기,호태면적화영향범위균체도최대치,6월하순호태개시진입쇠퇴기,호태면적、영향범위균축소,상대취집밀도적봉치출현재해시기；8월초부유소량호태표부재근해지대,8월21일호태전부소실。
Based on the MODIS 1B data,a dynamic threshold to extract information of enteromorpha in Shan-dong Peninsula was set according to normalized differential vegetation index( NDVI) ,and the spatial and tem-poral distribution characteristic was carried out. The results showed that the enteromorpha began at the end of May and lasted until the middle August in the shandong peninsula waters in 2013 . In early June as the devel-opment period of enteromorpha,the area and range of influence was larger and the relative packing density also increased,and at this time enteromorpha mainly distributed in the offshore. In middle June as the outbreak pe-riod of enteromorpha,the area and range of influence of enteromorpha reached the maximum. Enteromorpha en-tered recession period in late June. At this time,the area and range of influence of enteromorpha reduced and reached the maximum of the relative packing density. And in early August,only a little enteromorpha floated on the shore,then disappeared on August 21.