Acquisition of Essential Monitoring and Control Equipment for a Long-term, Multi-institutional Free-Air Carbon Dioxide and Ozone Enrichment Facility

为长期、多机构无空气二氧化碳和臭氧浓缩设施采购必要的监测和控制设备

• 批准号: 9601942
• 负责人: David Karnosky
• 金额: $ 25.1万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9601942&HistoricalAwards=false
• 关键词: Acquisition; Essential; Monitoring; Control; Equipment

We are in the process of developing a state-of-the art free-air carbon dioxide enrichment(FACE) facility in northern Wisconsin to examine the interacting effects of elevated CO2 and O3 on a Populus tremuloides forest ecosystem. The FACE system will allow study of community level forest responses to elevated CO2 and O3 under natural, nonchambered conditions. We have assembled a multidisciplinary team of scientists to examine responses from the molecular to the ecosystem levels. Our long-term goal is to examine the interacting effects of elevated CO2 and O3, alone and in combination, on the productivity, competitive interactions, and carbon and nitrogen fluxes in a regenerating aspen ecosystem. Three replicate FACE rings will be established in each of four treatments (CO2, O3, CO2 + O3 control) in a randomized complete block design. Rooted cuttings from nine P. tremuloides clones previously characterized for their O3 and/or CO2 sensitivities will be planted at 0.5 m x 0.5 m spacing across each FACE ring. The close spacing will simulate a naturally regenerating aspen forest. Fumigation with elevated CO2 (550 ppm) and O3 (50 ppb above background during photosynthetically active daylight hours to a target of 80 ppm-hr seasonal exposure) will be conducted over the approximately 100-day growing season. Growth measurements (height, diameter, biomass, leaf area, root production and root mortality), physiological measurements (photosynthesis, respiration, stomatal conductance, chlorophyll content), plant nutrient status (nitrogen), foliar biochemistry (carbohydrates, phenolic glycosides, and antioxidants), litter decomposition rates, and soil respiration will be made throughout each growing season. The establishment and operation of this FACE system is an expensive, capital-intensive research project. Therefore, we will encourage multiple use of the research site by researchers and their students. We currently have some 14 in vestigators and their graduate students involved. Thus far, we have three years' support from the U.S. Department of Energy, the U.S. Forest Service Northern Station's Global Change Program, the National Council for Air and Stream Improvement of the Pulp and Paper Industry, and Michigan Technological University. In addition, we have significant in-kind contributions by the U.S. Forest Service and Brookhaven National Laboratory. However, we are still short of capital for critical air and meteorological monitoring equipment, the related data acquisition systems, and ozone generation. This proposal seeks support for high resolution, rapid-response instrumentation for the ozone, CO2, and meteorological monitoring, and for the ozone generation needed for the facility. We seek $251,671 from the National Science Foundation Academic Research Infrastructure (ARI) Program; we have matching contributions of $59,955 from the National Council for Air and Stream Improvement of the Pulp and Paper Industry (NCASI) and $44,896 from the host institution, Michigan Technological University.

我们正在威斯康辛州北部开发一个最先进的自由空气二氧化碳富集（FACE）设施，以研究二氧化碳和臭氧浓度升高对白杨森林生态系统的相互作用。FACE系统将允许在自然、非室内条件下研究社区一级森林对二氧化碳和臭氧浓度升高的反应。我们已经组建了一个多学科的科学家团队来研究从分子到生态系统水平的反应。我们的长期目标是研究CO2和O3单独或联合升高对再生白杨生态系统中生产力、竞争相互作用以及碳氮通量的相互作用。采用完全随机区组设计，在4个处理（CO2、O3、CO2 + O3对照）中各建立3个重复FACE环。在每个FACE环上以0.5 m x 0.5 m的间距种植9个先前被鉴定为对O3和/或CO2敏感的tremuloides无性系的生根插枝。紧凑的间距将模拟一个自然再生的白杨林。在大约100天的生长季节中，将使用升高的二氧化碳（550 ppm）和臭氧（在光合活跃的白天比背景高50 ppb，达到80 ppm-hr的季节性暴露目标）进行熏蒸。生长测量（高度、直径、生物量、叶面积、根系产量和根系死亡率）、生理测量（光合作用、呼吸作用、气孔导度、叶绿素含量）、植物营养状况（氮）、叶面生物化学（碳水化合物、酚类苷和抗氧化剂）、凋落物分解率和土壤呼吸将在每个生长季节进行。该人脸识别系统的建立和运行是一项昂贵的、资金密集型的研究项目。因此，我们将鼓励研究人员和他们的学生多次使用研究网站。我们目前有大约14名调查人员和他们的研究生参与其中。到目前为止，我们得到了来自美国能源部、美国森林服务局北站全球变化项目、全国纸浆和造纸工业空气和气流改善委员会以及密歇根理工大学的三年支持。此外，我们还得到了美国林务局和布鲁克海文国家实验室的大量实物捐助。然而，我们仍然缺乏用于关键空气和气象监测设备、相关数据采集系统和臭氧生成的资金。该提案寻求支持用于臭氧、二氧化碳和气象监测的高分辨率、快速反应仪器，以及该设施所需的臭氧生成。我们从国家科学基金会学术研究基础设施（ARI）计划申请251,671美元；我们从全国纸浆和造纸工业空气和气流改善委员会（NCASI）获得了59,955美元的捐款，从主办机构密歇根理工大学获得了44,896美元的捐款。