Organic Aerosol Component (OACOMP) Value-Added Product

Technical Report · Fri Aug 23 00:00:00 EDT 2013

DOI:https://doi.org/10.2172/1226569· OSTI ID:1226569

Fast, J ^[1]; Zhang, Q; tilp, A ^[2]; Shippert, T ^[1]; Parworth, C; Mei, F ^[1]

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1. Pacific Northwest National Laboratory
2. Brookhaven National Laboratory

Organic aerosol (OA, i.e., the organic fraction of particles) accounts for 10–90% of the fine aerosol mass globally and is a key determinant of aerosol radiative forcing. But atmospheric OA is poorly characterized and its life cycle insufficiently represented in models. As a result, current models are unable to simulate OA concentrations and properties accurately. This deficiency represents a large source of uncertainty in quantification of aerosol effects and prediction of future climate change. Evaluation and development of aerosol models require data products generated from field observations. Real-time, quantitative data acquired with aerosol mass spectrometers (AMS) (Canagaratna et al. 2007) are critical to this need. The AMS determines size-resolved concentrations of non-refractory (NR) species in submicrometer particles (PM1) with fast time resolution suitable for both ground-based and aircraft deployments. The high-resolution AMS (HR-AMS), which is equipped with a high mass resolution time-of-flight mass spectrometer, can be used to determine the elemental composition and oxidation degrees of OA (DeCarlo et al. 2006).

• Research Organization: DOE Office of Science Atmospheric Radiation Measurement (ARM) Program (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Biological and Environmental Research (BER)
• DOE Contract Number: DE-AC05-7601830
• OSTI ID: 1226569
• Report Number(s): DOE/SC-ARM-TR-131; PNNL-22648
• Country of Publication: United States
• Language: English