Article

 

Water soluble organic aerosols in the Colorado Rocky Mountains, USA: composition, sources and optical properties. 公开 Deposited

https://scholar.colorado.edu/concern/articles/f7623d38r
Abstract
  • Atmospheric aerosols have been shown to be an important input of organic carbon and nutrients to alpine watersheds and influence biogeochemical processes in these remote settings. For many remote, high elevation watersheds, direct evidence of the sources of water soluble organic aerosols and their chemical and optical characteristics is lacking. Here, we show that the concentration of water soluble organic carbon (WSOC) in the total suspended particulate (TSP) load at a high elevation site in the Colorado Rocky Mountains was strongly correlated with UV absorbance at 254 nm (Abs254, r = 0.88 p < 0.01) and organic carbon (OC, r = 0.95 p < 0.01), accounting for >90% of OC on average. According to source apportionment analysis, biomass burning had the highest contribution (50.3%) to average WSOC concentration; SOA formation and motor vehicle emissions dominated the contribution to WSOC in the summer. The source apportionment and backward trajectory analysis results supported the notion that both wildfire and Colorado Front Range pollution sources contribute to the summertime OC peaks observed in wet deposition at high elevation sites in the Colorado Rocky Mountains. These findings have important implications for water quality in remote, high-elevation, mountain catchments considered to be our pristine reference sites.
Creator
Date Issued
  • 2016-12-19
Academic Affiliation
Journal Title
Journal Volume
  • 6
File Extent
  • 39339-39339
最新修改
  • 2019-12-06
Identifier
  • PubMed ID: 27991554
Resource Type
权利声明
DOI
ISSN
  • 2045-2322
Language

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