DOI: 10.1016/j.atmosenv.2014.11.027
Scopus记录号: 2-s2.0-84922905993
论文题名: Spatial patterns of atmospheric deposition of nitrogen and sulfur using ion-exchange resin collectors in Rocky Mountain National Park, USA
作者: Clow D ; W ; , Roop H ; A ; , Nanus L ; , Fenn M ; E ; , Sexstone G ; A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 101 起始页码: 149
结束页码: 157
语种: 英语
英文关键词: Deposition
; Ion-exchange
; Isotopes
; Nitrogen
; Park
; Sulfur
Scopus关键词: Air pollution
; Atmospheric chemistry
; Coal combustion
; Decision making
; Ion exchange
; Ion exchange resins
; Ions
; Isotopes
; Meteorological problems
; Nitrogen
; Parking
; Pollution
; Sulfur
; Urban transportation
; Agricultural areas
; Atmospheric depositions
; Atmospheric nitrates
; Geographic coverage
; Rocky Mountain National Park
; Spatial variability
; Transport of pollutants
; Western United States
; Deposition
; coal
; ion exchange resin
; nitrate
; nitrogen
; sulfur
; atmospheric deposition
; environmental monitoring
; ion exchange
; nitrate
; nitrogen
; policy making
; pollutant transport
; pollution control
; pollution exposure
; risk factor
; seasonal variation
; spatial analysis
; sulfur
; air pollutant
; Article
; atmospheric deposition
; combustion
; controlled study
; dry deposition
; ecosystem
; environmental monitoring
; health care policy
; national park
; nonhuman
; precipitation
; priority journal
; rural area
; sampling
; summer
; United States
; wet deposition
; wilderness
; winter
; Colorado
; Rocky Mountain National Park
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Lakes and streams in Class 1 wilderness areas in the western United States (U.S.) are at risk from atmospheric deposition of nitrogen (N) and sulfur (S), and protection of these resources is mandated under the Federal Clean Air Act and amendments. Assessment of critical loads, which are the maximum exposure to pollution an area can receive without adverse effects on sensitive ecosystems, requires accurate deposition estimates. However, deposition is difficult and expensive to measure in high-elevation wilderness, and spatial patterns in N and S deposition in these areas remain poorly quantified. In this study, ion-exchange resin (IER) collectors were used to measure dissolved inorganic N (DIN) and S deposition during June 2006-September 2007 at approximately 20 alpine/subalpine sites spanning the Continental Divide in Rocky Mountain National Park. Results indicated good agreement between deposition estimated from IER collectors and commonly used wet+dry methods during summer, but poor agreement during winter. Snowpack sampling was found to be a more accurate way of quantifying DIN and S deposition during winter. Summer DIN deposition was significantly greater on the east side of the park than on the west side (25-50%; p≤0.03), consistent with transport of pollutants to the park from urban and agricultural areas to the east. Sources of atmospheric nitrate (NO3 -) were examined using N isotopes. The average δ15N of NO3 - from IER collectors was 3.5‰ higher during winter than during summer (p<0.001), indicating a seasonal shift in the relative importance of regional NOx sources, such as coal combustion and vehicular sources of atmospheric NO3 -. There were no significant differences in δ15N of NO3 - between east and west sides of the park during summer or winter (p=0.83), indicating that the two areas may have similar sources of atmospheric NO3 -. Results from this study indicate that a combination of IER collectors and snowpack sampling can be used to characterize spatial variability in DIN and S deposition in high-elevation wilderness areas. These data can improve our ability to model critical loads by filling gaps in geographic coverage of deposition monitoring/modeling programs and thus may enable policy makers to better protect sensitive natural resources in Class 1 Wilderness areas. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82099
Appears in Collections: 气候变化事实与影响
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作者单位: United States Geological Survey, Denver Federal Center, MS 415, Denver, CO, United States; GNS Science, 1 Fairway Drive, Avalon, Lower Hutt, New Zealand; Department of Geography and Environment, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA, United States; US Forest Service, Pacific Southwest Research Station, 4955 Canyon Crest Drive, Riverside, CA, United States
Recommended Citation:
Clow D,W,, Roop H,et al. Spatial patterns of atmospheric deposition of nitrogen and sulfur using ion-exchange resin collectors in Rocky Mountain National Park, USA[J]. Atmospheric Environment,2015-01-01,101