Journal Article

FZJ-2017-07262

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Comprehensive characterization of atmospheric organic carbon at a forested site

Hunter, J. F. ; Day, D. A. ; Palm, B. B. ; Yatavelli, R. L. N. ; Chan, A. W. H. ; Kaser, L. ; Cappellin, L. ; Hayes, P. L. ; Cross, E. S. ; Carrasquillo, A. J. ; Campuzano-Jost, P. ; Stark, H. ; Zhao, Y. ; Hohaus, T.FZJ* ; Smith, J. ; Hansel, A. ; Karl, T. ; Goldstein, A. H. ; Guenther, A. ; Worsnop, D. ; Thornton, J. A. ; Heald, C. L. ; Jimenez, J. L. ; Kroll, J. H. (Corresponding author)

2017
Nature Publ. Group London

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Please use a persistent id in citations: doi:10.1038/ngeo3018

Abstract: Atmospheric organic compounds are central to key chemical processes that influence air quality, ecological health, and climate. However, longstanding difficulties in predicting important quantities such as organic aerosol formation and oxidant lifetimes indicate that our understanding of atmospheric organic chemistry is fundamentally incomplete, probably due in part to the presence of organic species that are unmeasured using standard analytical techniques. Here we present measurements of a wide range of atmospheric organic compounds—including previously unmeasured species—taken concurrently at a single site (a ponderosa pine forest during summertime) by five state-of-the-art mass spectrometric instruments. The combined data set provides a comprehensive characterization of atmospheric organic carbon, covering a wide range in chemical properties (volatility, oxidation state, and molecular size), and exhibiting no obvious measurement gaps. This enables the first construction of a measurement-based local organic budget, highlighting the high emission, deposition, and oxidation fluxes in this environment. Moreover, previously unmeasured species, including semivolatile and intermediate-volatility organic species (S/IVOCs), account for one-third of the total organic carbon, and (within error) provide closure on both OH reactivity and potential secondary organic aerosol formation.

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Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. 243 - Tropospheric trace substances and their transformation processes (POF3-243) (POF3-243)

Appears in the scientific report 2017

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 10 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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