论文部分内容阅读
海洋叶绿素a(Chla.)含量是了解世界海洋中地球生物化学循环的基础和估算海洋生产力的基本指标,是判断水域的肥瘠程度和评价水域渔业潜在生产力的基本依据。富集浮游植物的海域是海洋食植动物的大密度存在和水产资源丰富存在的基础,许多鱼类如金枪鱼等中上层鱼群集在锋面两侧或涡旋,这些特征与营养盐供给或混合层深度变化相关。北太平洋渔场已成为我国远洋渔业的重要组成部分,卫星遥感技术可以实现大面积同步的观测和一年四季连续的观测,是测定北太平洋渔场海洋叶绿素a的最有效方法。1 材料和方法1.1 数据来源卫星资料采用美国海洋水色卫星的宽视场海洋水色扫描仪(SeaWiFS)资料,全球海上测量资料利用国际海洋水色协调工作组(IOCCG)在世界大洋范围测量的1175个站位光谱数据和对应的叶绿素a浓度,南海测量数据由国家海洋技术中心在南海测量的48个站位光谱数据和叶绿
The content of marine chlorophyll a is the basic index for understanding the biogeochemical cycle of the earth in the world oceans and estimating the marine productivity. It is the basic basis for judging the fertility of waters and evaluating the potential productivity of fisheries in water areas. Phytoplankton-rich waters provide the basis for the large density of marine plant-animals and the abundance of aquatic resources. Many fish, such as the mid-pelagic turtle, cluster on either side of the fronts or vortexes. These characteristics are associated with nutrient supply or mixing Related to depth changes. North Pacific fishery has become an important part of ocean-going fishery in China. Satellite remote sensing technology can realize large-area synchronous observation and continuous observation all year round. It is the most effective method to determine marine chlorophyll-a in North Pacific fishery. 1 Materials and methods 1.1 Data sources Satellite data The wide-field SeaWiFS data from the United States Marine Aqua-Satellite, global maritime survey data were obtained from 1175 stations measured by the International Ocean Color Coordination Working Group (IOCCG) over the world oceanic range Bit spectral data and the corresponding chlorophyll a concentration, the South China Sea measured data from the National Oceanographic Technology Center in the South China Sea measured 48 stations spectral data and leaf green