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.

Hunter, J.F.; Day, D.A.; Palm, B.B.; Yatavelli, R.L.N.; Chan, A.H.; Kaser, L.; Cappellin, L.; Hayes, P.L.; Cross, E.S.; Carrasquillo, A.J.; Campuzano-Jost, P.; Stark, H.; Zhao, Y.L.; Hohaus, T.; Smith, J.N.; Hansel, A.; Karl, T.; Goldstein, A.H.; Guenther, A.; Worsnop, D.R.; Thornton, J.A.; Heald, C.L.; Jimenez, J.L.; Kroll, J.H. (2017). Comprehensive characterization of atmospheric organic carbon at a forested site. NATURE GEOSCIENCE, 10: 748-753. doi: 10.1038/ngeo3018 handle: http://hdl.handle.net/10449/46939

Comprehensive characterization of atmospheric organic carbon at a forested site

Cappellin, L.;
2017-01-01

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.
Settore CHIM/01 - CHIMICA ANALITICA
Hunter, J.F.; Day, D.A.; Palm, B.B.; Yatavelli, R.L.N.; Chan, A.H.; Kaser, L.; Cappellin, L.; Hayes, P.L.; Cross, E.S.; Carrasquillo, A.J.; Campuzano-Jost, P.; Stark, H.; Zhao, Y.L.; Hohaus, T.; Smith, J.N.; Hansel, A.; Karl, T.; Goldstein, A.H.; Guenther, A.; Worsnop, D.R.; Thornton, J.A.; Heald, C.L.; Jimenez, J.L.; Kroll, J.H. (2017). Comprehensive characterization of atmospheric organic carbon at a forested site. NATURE GEOSCIENCE, 10: 748-753. doi: 10.1038/ngeo3018 handle: http://hdl.handle.net/10449/46939
File in questo prodotto:
File Dimensione Formato  
Hunter_et_al-2017-Nature_Geoscience.pdf

solo utenti autorizzati

Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 670.07 kB
Formato Adobe PDF
670.07 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/46939
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 55
  • ???jsp.display-item.citation.isi??? 52
social impact