Synthesis of Existing High Resolution LTER/Icecolors Databases to Advance Physical Bio-Optical Modeling of Antarctic Primary Production

9618383霍夫曼和普雷泽林虽然南大洋的初级生产量对全球海洋碳通量很重要，但对南极水域生产量的大规模估计极不确定，对其在一系列时间和空间尺度上的变化量的了解也很少。因此，需要高分辨率的数据库来开发区域和季节性初级生产模式。这项研究将把现有的两个高分辨率物理、光学和初级生产数据集的组成部分混合在一个嵌套的生物光学和物理生物模型的总模型中，目的是预测南极沿海水域初级生产的模式和控制。广泛的LTER/Icecolors初级生产和物理动力学数据库涵盖了南极4年来在沿海水域时间序列站的研究以及在帕尔默半岛以西陆架/斜坡水域中尺度网格内确定的地点进行的几次工艺巡航。这将能够测试关于南极沿海水域初级生产的物理强迫的预测假说，并将推进生物光学模型，将光谱光场、变化的紫外线气候学、浮游植物群落动态和广泛的时间和空间尺度上的光合作用活动联系起来。总的目标是：a)利用1990-1994年期间收集的南极沿海不同季节的LTER中尺度数据库，开发和测试基于PAR的南极沿海水域初级生产的生物光学模式。B)混合LTER物理场Hofmann数据集和初级生产数据集Prezelin，以确定和量化混合层动态对Palmer半岛以西陆架/斜坡水域初级生产和浮游植物群落动态的影响。C)利用LTER初级生产力数据，检验全球初级生产力生物光学模拟的一般假设对南大洋大尺度初级生产力模拟的适用性。D)利用测量的紫外线气候学数据(Booth，NSF UV监测计划，Palmer Station)和模拟的依赖臭氧的紫外线气候学(Madronich博士的UV代码，3.2版，NCAR)，结合原位生物加权函数(BWF)和从冰色期间获得的不同浮游植物群落研究得出的UV剂量-反应曲线，事后预测太阳UV辐射对原位LTER初级生产力的影响，尽管GLOBEC/USJGOFS计划将主要侧重于南大洋的海洋水域，对现有数据库的迅速综合将提供有助于规划和执行其他多学科方案的物理-生物-光学模型方面的见解和进展。此外，随着这些项目的完成，将为方案之间的比较和整合提供重要的依据。方案的交叉比较是可能的，因为核心测量与JGOFS使用的测量相同，而且确定南大洋不同区域初级生产的短期可变性和长期趋势之间的差异的目标也是相同的。

9618383 Hofmann and Prezelin While primary production of the Southern Ocean is significant to global ocean carbon flux, large scale estimates of production for Antarctic waters are extremely uncertain and knowledge of the magnitude of its variability over a range of time and space scales is sparse. Thus, there is a need for high resolution databases for the development of regional and seasonal primary production models. This research will blend components of two existing high-resolution physical, optical and primary production datasets in a total model of nested bio-optical and physical biological models with the aim of predicting patterns and control of primary production in Antarctic coastal waters. The extensive LTER/Icecolors primary production and physical dynamics database covers 4 years of Antarctic research at time-series stations in coastal waters and during several process cruises at defined sites within a mesoscale grid of the shelf/slope waters west of the Palmer Peninsula. This will allow testing of predictive hypotheses regarding physical forcing of primary production in Antarctic coastal waters and will advance bio-optical models linking spectral light fields, changing UV climatology, phytoplankton community dynamics and photosynthetic activity over a wide range of time and space scales. General objectives are to: a) Develop and test bio-optical models of PAR-based primary production for Antarctic coastal waters, utilizing the LTER mesoscale data bases collected for different seasons between 1990-1994. b) Blend the LTER Physical Field Hofmann and Primary Production datasets Prezelin to define and quantify the effect of mixed-layer dynamics on primary production and phytoplankton community dynamics in the shelf/slope waters west of the Palmer Peninsula. c) Utilize LTER primary production data to test the applicability of a general hypothesis of bio-optical modeling of global primary production to modeling large scale primary prod uction in the Southern Ocean. d) Hindcast the impact of solar UV radiation on in situ LTER primary production, utilizing measured UV climatology data (Booth, NSF UV Monitoring Program, Palmer Station) and modeled ozone-dependent UV climatology (Dr. Madronich's UV CODE, version 3.2, NCAR) in combination with in situ biological weighting functions (BWFs) and UV dose-response curves derived from studies of diverse phytoplankton communities acquired during Icecolors `90 r `93 Although GLOBEC/USJGOFS programs will largely focus on oceanic waters of the Southern Ocean, a prompt synthesis of the existing databases will provide insights and advances in physical-bio-optical models useful to the planning and execution of the other multidisciplinary programs. Furthermore, important bases will be provided for comparison and integration between programs as those projects are completed. Cross-comparison of programs is possible since core measurements are the same as those used in JGOFS, and the goals of ascertaining the differences between short-term variability and long-term trends in primary production in diverse regions of the Southern Ocean are shared.