Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, Colorado 80523-1375, USA.
National Park Service, Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, Colorado 80523-1375, USA.
J Air Waste Manag Assoc. 2013 Nov;63(11):1245-63. doi: 10.1080/10962247.2013.804466.
Changes in ecosystem function at Rocky Mountain National Park (RMNP) are occurring because of emissions of nitrogen and sulfate species along the Front Range of the Colorado Rocky Mountains, as well as sources farther east and west. The nitrogen compounds include both oxidized and reduced nitrogen. A year-long monitoring program of various oxidized and reduced nitrogen species was initiated to better understand their origins as well as the complex chemistry occurring during transport from source to receptor. Specifically the goals of the study were to characterize the atmospheric concentrations of nitrogen species in gaseous, particulate, and aqueous phases (precipitation and clouds) along the east and west sides of the Continental Divide; identify the relative contributions to atmospheric nitrogen species in RMNP from within and outside of the state of Colorado; identify the relative contributions to atmospheric nitrogen species in RMNP from emission sources along the Colorado Front Range versus other areas within Colorado; and identify the relative contributions to atmospheric nitrogen species from mobile sources, agricultural activities, and large and small point sources within the state of Colorado. Measured ammonia concentrations are combined with modeled releases of conservative tracers from ammonia source regions around the United States to apportion ammonia to its respective sources, using receptor modeling tools.
由于科罗拉多落矶山脉前岭沿线以及更东边和西边的排放源，氮和硫酸盐物种的排放正在改变落矶山国家公园（RMNP）的生态系统功能。氮化合物包括氧化态和还原态氮。启动了一项为期一年的各种氧化态和还原态氮物种的监测计划，以更好地了解它们的来源以及从源到受体传输过程中发生的复杂化学过程。具体而言，这项研究的目的是描述沿大陆分水岭东西两侧的气相、颗粒相和水相（降水和云）中氮物种的大气浓度；确定来自科罗拉多州内外的大气氮物种对 RMNP 的相对贡献；确定科罗拉多落矶山脉沿线排放源对 RMNP 大气氮物种的相对贡献与科罗拉多州内其他地区的相对贡献；并确定来自科罗拉多州内移动源、农业活动以及大型和小型点源的大气氮物种的相对贡献。将测量的氨浓度与来自美国氨源地区的保守示踪剂的模型释放相结合，使用受体建模工具将氨分配到其各自的来源。
