REU: Long-Path FTIR Analysis of Ecosystem Processes Over Varying Landscape and Spatial Scales

长光程傅里叶变换红外光谱（FTIR） 是一种非常有价值的技术， 近地表大气中的浓度。 戈斯博士 Dahm和Risser对CO2，H2O， CH 4、CO和N2 O在光程长度范围远至1 公里和时间频率小至1.5秒 的间隔 迄今为止，他们的研究已经广泛测试了 FTIR仪器在现场条件下进行了实验， 仪器设置的各种组合，以最大限度地检测 不同的路径长度和气体的灵敏度。 的 仪器能够重复高分辨率 分析大气中的关键痕量气体， 受陆地和水生营养物质的强烈影响， 能量循环过程。 这一延续建议强调了戈斯博士，达姆， 和里塞尔将接口在该领域的新发展， 微气象学与长路径FTIR移动生态学到新的 先进的技术水平， 气体通量的关键过程和速率的检验. 现实的时空尺度。 主要 这项建议的目标是： 1.与生态系统过程有关的试验尺度理论。 2.发展路径平均气象通量测量 来量化长路径通量 3.用路径平均气体测度生态系统功能 剂. 这项研究工作涉及跨学科间- 与理论和实验微气象学家的合作 (U.S.陆军，NOAA，NCAR），以及理论和实验 生态系统科学家 可以研究的尺度范围 同时使用FTIR和新的微气象 仪器化弥合了传统生态学与现代科学之间的差距， 技术和新兴的大型飞机和卫星- 基于技术。 该提案的一个主要目标是 进一步发展生态和气象之间的联系 在适当尺度上进行衡量，以用于解决 区域和全球环境变化。 Gosz，Dahm和Risser博士富有成效和创新精神 科学家 他们的研究项目已经引入了重要的 生态系统研究的新技术。 体制 对这项研究的支持是极好的。

Long-path Fourier Transform InfraRed spectroscopy (FTIR) is a very valuable technique for quantifying trace gas concentrations in the near-surface atmosphere. Drs. Gosz, Dahm, and Risser performed path-averaged analyses for CO2, H20, CH4, CO, and N2O over optical path-lengths ranging as far as 1 km and at temporal frequencies as small as 1.5 second intervals. Their research to date has extensively tested the FTIR instrument under field conditions and experimented with various combinations of instrument setups to maximize detection sensitivity for different path-lengths and gases. The instrument is capable of making repeated high resolution analyses of key trace gases in the atmosphere which are strongly influenced by terrestrial and aquatic nutrient and energy cycling processes. This continuation proposal emphasizes how Drs. Gosz, Dahm, and Risser will interface new developments in the field of micrometeorology with long-path FTIR to move ecology to a new level of technological sophistication that permits the examination of key processes and rates of gas fluxes at realistic spatial and temporal scales in the field. The major objectives of this proposal are: 1. Test Scale Theory Relating to Ecosystem Processes. 2. Develop Path-Averaged Meteorological Flux Measurements to Quantify Long-Path Fluxes. 3. Measure Ecosystem Function with Path-Averaged Gaseous Fluxes. This research effort involves interdisciplinary inter- actions with theoretical and experimental micrometeorologists (U.S. Army, NOAA, NCAR), and theoretical and experimental ecosystem scientists. The range of scales that can be studied with the concurrent use of the FTIR and new micrometeorological instrumentation bridges the gap between traditional ecological techniques and emerging macroscale air-craft and satellite- based technologies. A major goal of this proposal is to further develop links between ecological and meteorological measurements at appropriate scales for use in addressing issues of regional and global environmental change. Drs. Gosz, Dahm, and Risser are productive and innovative scientists. Their research program has introduced important new technology to ecosystem research. The institutional support for this research is excellent.