MRI: Acquisition of a total organic carbon analyzer for undergraduate training and research quantifying how climate-glacier interactions impact land-to-ocean fluxes of carbon

MRI：购买总有机碳分析仪，用于本科生培训和研究，量化气候-冰川相互作用如何影响陆地到海洋的碳通量

• 批准号: 1726177
• 负责人: Jason Fellman
• 金额: $ 5.03万
• 依托单位: University of Alaska Southeast Juneau Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1726177&HistoricalAwards=false
• 关键词: MRI; Acquisition; total; organic; carbon

EAR-1726177FellmanThis grant supports acquisition of a dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) analyzer that will be located in a lab shared by the USFS Pacific Northwest Research Station and the University of Alaska Southeast. Acquisition of this instrument will provide the infrastructure necessary to quantify DOC fluxes from watersheds of varying glacial coverage, thus creating a space-for-time substitution to determine how climate-glacier interactions are driving ecological change in the region. The DOC/TDN analyzer will replace an aging, non-functional instrument that is located off campus and is owned by the USFS. Acquisition of this instrument will allow the investigators to reinvigorate stream biogeochemistry research efforts aimed at understanding the biophysical impacts of glacial change on coastal watersheds in southeast Alaska, facilitate access to the instrument by outside users, and enhance undergraduate training. In particular, the instrument will strengthen the research training opportunities for undergraduates in Environmental Science as well as provide the opportunity to recruit and train members of two groups (rural and Alaska Native students) that are traditionally highly under-represented in the Environmental Sciences.The DOC/TDN analyzer allows for rapid and precise measurement of concentrations of DOC and TDN. Research applications include: 1) determining how climatically-driven changes in snow/rainfall regimes that influence the timing and magnitude of glacial runoff are driving stream water DOC and nutrient fluxes in the region, 2) quantifying the relationship between disinfection byproduct formation, DOC concentrations and precipitation event size in watersheds that currently or may provide drinking water in rural watersheds, 3) testing the use of DOC as a proxy for methylmercury concentrations in forested and wetland-dominated watersheds, and 4) determining how seasonal changes in the movement of water from soils to streams controls the production, speciation and timing of lateral carbon export from forested ecosystems.

EAR-1726177FELLMANTHIS赠款支持收购溶解的有机碳（DOC）和总溶解的氮（TDN）分析仪，该分析仪将位于USFS Pacific Northwest Research Station和Alaska Southeast分享的实验室中。获取该工具将提供必要的基础设施，以量化不同冰川覆盖范围的流域的DOC通量，从而创建一个时间替代，以确定气候 - 冰川相互作用如何推动该地区的生态变化。 DOC/TDN分析仪将取代位于校园外且由USF拥有的老化，非功能仪器。获取该工具将使研究人员能够振兴溪流生物地球化学研究工作，旨在了解冰川变化对阿拉斯加东南部沿海流域的生物物理影响，从而促进外部用户进入该乐器的机会，并增强大学培训。尤其是，该工具将加强环境科学上的大学生的研究培训机会，并为传统上在环境科学中代表性高度不足的两个群体（农村和阿拉斯加土著学生）的招募和培训成员提供机会。DOC/TDN分析仪可快速，精确地测量文档和TDN浓度的浓度。研究应用程序包括：1）确定影响冰川径流的时间和大小的降雪/降雨状况的变化是如何驱动该地区的溪流水和养分通量的量化，2）量化消毒副产品形成，文档浓度，浓度和降水量事件目前在Watershed中的浓度和降水量大小的关系，这些杂志当前的探测量可能会提供量牌，以便提供水的饮用水状况。森林和湿地为主导的流域中的甲基汞浓度，以及4）确定水从土壤到溪流的季节性变化如何控制森林生态系统的侧向碳出口的生产，物种形成和时间。