scholarly journals Ubiquity of organic nitrates from nighttime chemistry in the European submicron aerosol

2016 ◽  
Vol 43 (14) ◽  
pp. 7735-7744 ◽  
Author(s):  
A. Kiendler-Scharr ◽  
A. A. Mensah ◽  
E. Friese ◽  
D. Topping ◽  
E. Nemitz ◽  
...  
Keyword(s):  
Organic Nitrates ◽  
Submicron Aerosol ◽  
Nighttime Chemistry

scholarly journals Formation of condensable organic vapors from anthropogenic and biogenic VOCs is strongly perturbed by NO<sub>x</sub> in eastern China

2021 ◽  
Author(s):  
Yuliang Liu ◽  
Wei Nie ◽  
Yuanyuan Li ◽  
Dafeng Ge ◽  
Chong Liu ◽  
...  
Keyword(s):  
Eastern China ◽  
Carbon Number ◽  
Decisive Role ◽  
Urban Atmosphere ◽  
Organic Nitrates ◽  
Ionization Mass ◽  
Peroxy Radicals ◽  
Related Factors ◽  
Organic Vapors ◽  
Nighttime Chemistry

Abstract. Oxygenated organic molecules (OOMs) are the crucial intermediates linking volatile organic compounds (VOCs) to secondary organic aerosol (SOA) in the atmosphere, but understandings on the characteristics of OOMs and their formations from VOCs are very limited. Ambient observations of OOMs using recently developed mass spectrometry techniques are still limited, especially in polluted urban atmosphere where VOCs and oxidants are extremely variable and complex. Here, we investigate OOMs, measured by a nitrate-ion-based chemical ionization mass spectrometer at Nanjing in eastern China, through performing positive matrix factorization on binned mass spectra (binPMF). The binPMF analysis reveals three factors about anthropogenic VOCs (AVOCs) daytime chemistry, three isoprene-related factors, three factors about biogenic VOCs (BVOCs) nighttime chemistry, and three factors about nitrated phenols. All factors are influenced by NOx in different ways and to different extents. Over 1000 non-nitro molecules have been identified and then reconstructed from the selected solution of binPMF, and about 72 % of the total signals are contributed by nitrogen-containing OOMs, mostly regarded as organic nitrates formed through peroxy radicals terminated by nitric oxide or nitrate-radical-initiated oxidations. Moreover, multi-nitrates account for about 24 % of the total signals, indicating the significant presence of multiple generations, especially for isoprene (e.g., C5H10O8N2 and C5H9O10N3). Additionally, the distribution of OOMs concentration on carbon number confirm their precursors driven by AVOCs mixed with enhanced BVOCs during summer. Our results highlight the decisive role of NOx on OOMs formation in densely populated areas, and encourage more studies on the dramatic interactions between anthropogenic and biogenic emissions.

Submikroninių aerozolio dalelių kilmės ir fizikinių-cheminių parametrų įtaka atmosferos šiluminei pusiausvyrai

2020 ◽  
Author(s):  
◽  
Julija Pauraitė-Dudek
Keyword(s):  
Chemical Parameters ◽  
Radiative Balance ◽  
Submicron Aerosol ◽  
Physical Chemical ◽  
The Impact ◽  
Aerosol Source

The impact of submicron aerosol source and physical-chemical parameters on atmospheric radiative balance

scholarly journals Characterization of submicron aerosol particles in winter at Albany, New York

2022 ◽  
Vol 111 ◽  
pp. 118-129
Author(s):  
Xiuli Wei ◽  
Huaqiao Gui ◽  
Jianguo Liu ◽  
Ying Cheng
Keyword(s):  
New York ◽  
Aerosol Particles ◽  
Submicron Aerosol

scholarly journals Evaluating model parameterizations of submicron aerosol scattering and absorption with in situ data from ARCTAS 2008

2016 ◽  
Vol 16 (14) ◽  
pp. 9435-9455 ◽  
Author(s):  
Matthew J. Alvarado ◽  
Chantelle R. Lonsdale ◽  
Helen L. Macintyre ◽  
Huisheng Bian ◽  
Mian Chin ◽  
...  
Keyword(s):  
Optical Properties ◽  
Size Distribution ◽  
Aerosol Size Distribution ◽  
Visible Radiation ◽  
Submicron Aerosol ◽  
In Situ Data ◽  
Aerosol Absorption ◽  
Aerosol Scattering ◽  
The Impact

Abstract. Accurate modeling of the scattering and absorption of ultraviolet and visible radiation by aerosols is essential for accurate simulations of atmospheric chemistry and climate. Closure studies using in situ measurements of aerosol scattering and absorption can be used to evaluate and improve models of aerosol optical properties without interference from model errors in aerosol emissions, transport, chemistry, or deposition rates. Here we evaluate the ability of four externally mixed, fixed size distribution parameterizations used in global models to simulate submicron aerosol scattering and absorption at three wavelengths using in situ data gathered during the 2008 Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) campaign. The four models are the NASA Global Modeling Initiative (GMI) Combo model, GEOS-Chem v9-02, the baseline configuration of a version of GEOS-Chem with online radiative transfer calculations (called GC-RT), and the Optical Properties of Aerosol and Clouds (OPAC v3.1) package. We also use the ARCTAS data to perform the first evaluation of the ability of the Aerosol Simulation Program (ASP v2.1) to simulate submicron aerosol scattering and absorption when in situ data on the aerosol size distribution are used, and examine the impact of different mixing rules for black carbon (BC) on the results. We find that the GMI model tends to overestimate submicron scattering and absorption at shorter wavelengths by 10–23 %, and that GMI has smaller absolute mean biases for submicron absorption than OPAC v3.1, GEOS-Chem v9-02, or GC-RT. However, the changes to the density and refractive index of BC in GC-RT improve the simulation of submicron aerosol absorption at all wavelengths relative to GEOS-Chem v9-02. Adding a variable size distribution, as in ASP v2.1, improves model performance for scattering but not for absorption, likely due to the assumption in ASP v2.1 that BC is present at a constant mass fraction throughout the aerosol size distribution. Using a core-shell mixing rule in ASP overestimates aerosol absorption, especially for the fresh biomass burning aerosol measured in ARCTAS-B, suggesting the need for modeling the time-varying mixing states of aerosols in future versions of ASP.

Thermal Decomposition of Organic Nitrates

Nature ◽  
1947 ◽  
Vol 160 (4074) ◽  
pp. 753-754 ◽  
Author(s):  
L. PHILLIPS
Keyword(s):  
Thermal Decomposition ◽  
Organic Nitrates

Synthesis of Some Novel Organic Nitrates and Comparative in Vitro Study of Their Vasodilator Profile

2009 ◽  
Vol 52 (13) ◽  
pp. 4020-4025 ◽  
Author(s):  
Konstantin Chegaev ◽  
Loretta Lazzarato ◽  
Paolo Marcarino ◽  
Antonella Di Stilo ◽  
Roberta Fruttero ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Organic Nitrates

Potency and In Vitro Tolerance of Organic Nitrates: Partially Denitrated Metabolites Contribute to the Tolerance-Devoid Activity of Pentaerythrityl Tetranitrate

2007 ◽  
Vol 50 (1) ◽  
pp. 68-74 ◽  
Author(s):  
Andreas Koenig ◽  
Kathrin Lange ◽  
Joerg Konter ◽  
Andreas Daiber ◽  
Dirk Stalleicken ◽  
...  
Keyword(s):  
Organic Nitrates

scholarly journals The NO3 Frequency in Organic Nitrates

Nature ◽  
1932 ◽  
Vol 129 (3268) ◽  
pp. 905-905
Author(s):  
A. S. GANESAN ◽  
V. N. THATTE
Keyword(s):  
Organic Nitrates

scholarly journals Nighttime chemistry at a rural site in the Lower Fraser Valley

2004 ◽  
Vol 38 (34) ◽  
pp. 5837-5848 ◽  
Author(s):  
Robert McLaren ◽  
Rhian A. Salmon ◽  
John Liggio ◽  
Katherine L. Hayden ◽  
Kurt G. Anlauf ◽  
...  
Keyword(s):  
Rural Site ◽  
Nighttime Chemistry ◽  
Lower Fraser Valley ◽  
Fraser Valley
Sign in / Sign up

Export Citation Format

Share Document