Collaborative Research: AON: The Arctic Great Rivers Observatory (Arctic-GRO)

正如血液化学的变化可以用来诊断一个人的健康？S一样，河流水化学的变化也可以用来评估一条河流的状况？S流域。在北冰洋，六条巨大的河流从流入北冰洋的陆地面积的三分之二中获取淡水径流。这种径流的化学成分反映了分水岭的特征(例如土壤成分)，并为海洋环境带来了必要的营养。北极大河观测站的首要科学目标是对这六条大河的化学成分进行持续观测，这对于评估陆上变化对北冰洋的物理、化学和生物特性产生影响至关重要。该项目涉及与育空河部落间分水岭委员会、领航站传统委员会、可再生资源委员会的Gwichya Gwich？以及阿拉斯加大学库斯科温社区学院的合作伙伴关系，该社区学院主要服务于育空-库斯科维姆三角洲的Yup？IK居民。。北极大河观测站包括的六条河流是北美的育空河和麦肯齐河，以及欧亚大陆的鄂比河、叶尼西河、莱纳河和科利马河。这些河流将在河口附近进行采样，为期三年，每两个月一次，使用相同的样本收集和保存方案。将对所有样品测量大约40个参数，包括溶解和颗粒有机碳浓度和同位素组成、溶解营养物质、主要离子和微量元素的浓度，以及溶解有机物的光学性质，包括紫外线吸收和荧光激发-发射矩阵。出于质量保证/质量控制的目的，所有分析都将在一个实验室进行。由此产生的数据以及关于河流流量的补充数据将不受限制地在北极-GRO网站(arcticGreatrivers.org)上提供，并通过NSF北极数据中心提供。北极--GRO数据以2003年以来的观测记录为基础，为海洋学研究界以及陆地景观变化分析提供了宝贵的终端成员。

Just like changes in blood chemistry can be used to diagnose an individual?s health, so too can changes in river water chemistry be used to evaluate the condition of a river?s watershed. In the Arctic, six massive rivers capture freshwater runoff from two-thirds of the land area that drains to the Arctic Ocean. The chemistry of this runoff reflects watershed characteristics (e.g. soil composition), and carries essential nutrients to the marine environment. The overarching scientific objective of the Arctic Great Rivers Observatory (Arctic-GRO) is to make sustained observations of the chemistry of these six large rivers, which is vital for assessing changes on land that subsequently impact physical, chemical, and biological properties of the Arctic Ocean. The project involves partnerships with the Yukon River Intertribal Watershed Council, The Pilot Station Traditional Council, the Gwichya Gwich?in Renewable Resource Council, and with the University of Alaska at Kuskowkwin community college that serves the largely Yup?ik residents of the Yukon-Kuskowkwim Delta. . The six rivers included in the Arctic Great Rivers Observatory are the Yukon and Mackenzie in North American and the Ob?, Yenisey, Lena, and Kolyma in Eurasia. The rivers will be sampled near their mouths, every two months for three years, using identical sample collection and preservation protocols. Approximately 40 parameters will be measured on all samples including dissolved and particulate organic carbon concentrations and isotopic compositions, concentrations of dissolved nutrients, major ions, and trace elements, and optical properties of dissolved organic matter, including UV absorbance and fluorescence excitation-emission matrices. For QA/QC purposes, every analysis will be conducted at a single laboratory. The resulting data, along with complementary data on river discharge, will be made available without restriction at the Arctic-GRO website (arcticgreatrivers.org) and through the NSF Arctic Data Center. Arctic-GRO data, which build on observatory records that extend back to 2003, provide valuable end-members for the oceanographic research community as well as for analyses of terrestrial landscape change.