基于遥感资料的2008年黄海绿潮浒苔水文气象条件分析  

Analysis on the Hydro-Moteorological Conditions from Remote Sensing Data for the 2008 Algal Blooming in the Yellow Sea

作　　者：张苏平[1] 刘应辰[1] 张广泉[2] 管磊[3] 

机构地区：[1]中国海洋大学海洋-大气相互作用与气候实验室,山东青岛266100 [2]国家海洋局南海工程勘察中心,广东广州510300 [3]中国海洋大学信息科学与工程学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2009年第5期870-876,共7页Periodical of Ocean University of China

基　　金：科技部浒苔专项(2008BAC49B02)资助

摘　　要：利用EOS卫星的多通道资料,采用通道合成的方法,给出了2008年5～7月间黄海海面浒苔的分布情况。利用卫星遥感的海上风场、降水、云中液态水含量、海表面温度(SST)等资料,分析了绿潮浒苔期间的水文气象条件、以及浒苔聚集和定向移动的原因。结果表明:2008年4～5月中旬苏北～山东半岛、黄海西部降水异常偏多导致近海营养盐偏多,5月下旬黄海上空日照比较充足,光和作用加强,有利于海上浒苔迅速繁殖。5～6月黄海大风日数异常偏少,可导致悬浮泥沙少,有利于可见光在水中的透射,利于浒苔的生长。浒苔的密集区位置与风场辐合区位置比较一致,浒苔密集区的移动与盛行风向基本一致,向下风方向漂移。6月偏东风异常是浒苔在青岛附近沿岸大量聚集的主要原因。From May to July 2008, Enteromorpha prolifera blooms in the mid-western Yellow Sea producing green tide. By using EOS/MODIS remote sensing data, the densely distributed algal areas are detected. The environmental hydro-meteorological conditions, such as wind speed and direction, precipitation, cloud liquid water content（CLW） and sea surface temperature（SST） are analyzed for the period of the green tide. The concentrations of algal coverage and their drift paths are also discussed. The results show that from April to mid- May 2008, extremely more precipitation occurs around north Jiangsu to Shandong Peninsula and the western Yellow Sea coast, while the precipitation and CLW are less than usual over the western Yellow Sea in the late May. More rainfall can bring plenty of nutritions to the sea water and the following less CLW can permit more solar energy to come into the sea water producing strong photosynthesis, both of which could benefit to the algal blooming. On the other side, the frenquency of gale day is less.than usual from May to June. The weaker wind can reduce the amount of suspendid sand and the exchange and mixing of sea water, both of which are also favorable to the algal reproduction. SSTA does not show the pronounced anomaly which compared with the conditions in 2006 and 2007. The position of densely distributed alga area is consistent with the wind convergence and the drift of the area is to the downwind direction.

关 键 词：浒苔 黄海 水文气象条件 卫星遥感 

分 类 号：X55[环境科学与工程—环境工程]