Mapset: Incident Light for the Wet and Dry Seasons in the Northern Marine Region

Maps showing the mean incident light for the both the wet season and dry season in the Northern Marine Region. This data is the surface solar irradiance data obtained for NASA/GISS to allow the production of photosynthetically active solar irradiance fields to allow the calculation of primary production using satellite ocean colour products. The information comes from the Internation Satellite Cloud Climatology Project (ISCCP) using C1 data from multiple geostationary and polar orbiting meteorological satellites to provide a global view of the occurrence and properties of clouds. Atmospheric, cloud and surface data from ICSSP are used as input along with a scheme for computing clear-sky irradiance from the solar zenith angle, air properties, and surface reflectance. The scheme then uses simple cloud properties (cloud fraction, cloud optical thickness, and diffuse albedo) to produce total and photosynthetically active solar irradiance fields (Bishop and Rossow 1991; ISCCP Documentation of Cloud Data; Frouin et al. 1989). Input and output data fields are given in a 2.5° latitude and longitude grid. These maps have been produced by CSIRO for the National Oceans Office, as part of an ongoing commitment to natural resource planning and management through the 'National Marine Bioregionalisation' project.

本数据集包含北海洋区湿季与干季的平均入射光分布图。该数据为美国国家航空航天局/戈达德太空研究所（NASA/GISS）获取的地表太阳辐照度（surface solar irradiance）数据，用于生成光合有效太阳辐照度（photosynthetically active solar irradiance）场，以便借助卫星海洋颜色产品计算海洋初级生产力。数据源自国际卫星云气候学项目（International Satellite Cloud Climatology Project, ISCCP），该项目利用多颗地球静止轨道与极地轨道气象卫星获取的C1级数据，实现全球云系发生情况与云物理特性的全域观测覆盖。研究采用ISCCP的大气、云系与地表数据作为输入，结合基于太阳天顶角、大气参数及地表反照率计算晴空辐照度的算法。该算法进一步通过核心云参数（云量、云光学厚度及漫反照率）生成总太阳辐照度场与光合有效太阳辐照度场（Bishop和Rossow, 1991；《国际卫星云气候学项目云数据文档》；Frouin等, 1989）。输入与输出数据场均采用2.5°经纬网格进行组织与存储。本图集由澳大利亚联邦科学与工业研究组织（CSIRO）为澳大利亚国家海洋办公室制作，系"国家海洋生物区划"项目的成果之一，该项目长期致力于推进自然资源规划与管理工作。