Modeling Primary Production of the Southern Ocean for ROAVERRS (Research on Ocean-Atmosphere Variability and Ecosystem Response in the Ross Sea)

9529569 Lizotte本提案描述了1996-97年和1997-98年10月至3月期间在罗斯海西南部进行的NSF资助的实地项目的水柱和海冰初级生产力的模拟研究。 初步模拟研究的重点将是得出南大洋初级生产力的初步估计数。 这些初步估计数将基于： 1)目前对南大洋浮游植物和海冰藻类的生理学、生物化学和生态学的理解; 2）海冰覆盖、云量、海面温度和藻类色素的气候学; 3）现有的海冰和水柱深度相关（1-D）初级生产力建模方法。 其中一个主要目标是使用一个一致的，现代的估计方法（生物光学建模）的水柱和海冰中的初级生产的相对量的第一次确定这两个系统。 然后将进行敏感性分析，以指导ROAVERRS项目的规划;这些分析将直接适用于与估计南大洋初级生产量问题有关的联合全球海洋渔业系统和全球海洋环境方案活动的规划。 具体而言，他们将研究模型对ROAVERRS研究区域中采样尺度（时间和空间）的敏感性，以及对ROAVERRS期间拟议测量的变量变化的敏感性（例如，藻类生物光学、光合作用参数、光的光谱质量、营养物浓度、海冰厚度、积雪、水柱混合率、温度）。 在完成这项建模研究之后，ROAVERRS项目将根据扩展的数据库（例如，调整模型，以适应不同类型的海冰生境或浮游植物大量繁殖），并对照实地观测对这些模型进行测试。

9529569 Lizotte This proposal describes modeling studies of primary production in the water column and sea ice for an NSF-funded field program to take place in the southwest Ross Sea between October and March of 1996-97 and 1997-98. The focus of the initial modeling studies will be to derive initial estimates of primary productivity for the Southern Ocean. These initial estimates will be based on: 1) current understanding of the physiology, biochemistry and ecology of Southern Ocean phytoplankton and sea ice algae; 2) climatologies for sea ice cover, cloud cover, sea surface temperature and algal pigments; and 3) existing modeling approaches for depth-dependent (1-D) primary production in sea ice and water column. One of the primary goals is to make the first determination of the relative amounts of primary production in the water column and in the sea ice using a consistent, modern estimation method (bio-optical modeling) for both systems. Sensitivity analyses will then be performed to guide planning of the ROAVERRS Project; these analyses will be directly applicable to planning for JGOFS and GLOBEC activities related to the question of estimating primary production in the Southern Ocean. Specifically, they will study model sensitivity to sampling scales (temporal and spatial) in the ROAVERRS study region and to variation in the variables proposed for measurement during ROAVERRS (e.g., algal bio-optics, photosynthetic parameters, spectral quality of light, nutrient concentration, sea ice thickness, snow cover, water column mixing rates, temperature). Following completion of this modeling study, the ROAVERRS Project will make improvements to the models based on an expanded data base (e.g., tuning the model for different types of sea ice habitat or phytoplankton blooms) and carry out testing of these models against field observations.