Acquisition of a Flow Injection System and a Carbonate Carbon Analyzer for the Large Lakes Observatory

这项资助为德卢斯明尼苏达大学大湖天文台（LLO）购买碳酸盐碳电量仪和自动分析仪（流动注射系统）的成本提供部分支持，用于分析营养物质（即亚硝酸盐，硝酸盐，磷酸盐，溶解二氧化硅，氨）。这两种仪器都是海洋学和湖沼学实验室分析天然水和沉积物样本的标准设备。LLO正在扩充教师队伍（总共有7名新教师），最近还设立了一个新的水资源博士项目。由于德卢斯远离明尼阿波利斯主校区现有的分析设施，是研究五大湖（尤其是苏必利尔湖）的天然场所，为水柱和湖泊沉积物中的有机碳和营养动态研究提供这些基本分析能力，将极大地促进古湖泊学、古气候学和沉积成岩生物地球化学领域的内部研究和教育。了解营养物质有效性、初级生产与底栖生物再生和/或有机碳埋藏之间的关系，对于了解全球碳循环、古气气学以及帮助预测大气中人为二氧化碳增加的影响至关重要。美国和加拿大的五大湖由于其巨大的面积，显然是全球重要的碳和淡水储存库。因此，从科学和经济的角度来看，了解这些系统的生物地球化学是很重要的。LLO的教师和学生并不局限于研究美国五大湖，而是一直并将继续参与东非裂谷湖和中亚大型湖泊的研究

9902853McManusThis grant provides partial support of the costs of acquiring both a carbonate carbon coulometer and an autoanalyzer (flow injection system) for the analysis of nutrients (i.e. nitrite, nitrate, phosphate, dissolved silica, ammonia) for the University of Minnesota Large Lakes Observatory (LLO) in Duluth. Both instruments are standard in oceanographic and limnological laboratories for the analysis of natural waters and sediment samples. The LLO is undergoing an expansion in faculty (a total of seven new faculty) and has recently instituted a new Ph.D. program in Water Resources. As Duluth is remote from existing analytical facilities at the Minneapolis main campus and is a natural venue for the study of the Great Lakes (especially Lake Superior), provision of these basic analytical capabilities for studies of organic carbon and nutrient dynamics in the water column and within lake sediments will greatly facilitate in-house research and education in the fields of paleolimnology, paleoclimatology and the biogeochemistry of sediment diagenesis. Understanding the relationships between nutrient availability, primary production and benthic regeneration and/or burial of organic carbon is critical for understanding the global carbon cycle, paleoclimatology and to aid in prediction of the effects of increasing anthropogenic CO2 in the atmosphere. The U.S. and Canadian Great Lakes are an obvious and globally important reservoir for carbon and fresh water due to their sheer size. Understanding the biogeochemistry of these systems is therefore important for scientific and economic reasons. Faculty and students at the LLO do not limit themselves to study of the U.S. Great Lakes but have been and continue to be involved in study of the East African Rift Lakes and large lakes in central Asia.***