PMID- 31221392
OWN - NLM
STAT- MEDLINE
DCOM- 20190726
LR  - 20190726
IS  - 1001-0742 (Print)
IS  - 1001-0742 (Linking)
VI  - 83
DP  - 2019 Sep
TI  - Diurnal variation of aethalometer correction factors and optical absorption 
      assessment of nucleation events using multi-wavelength photoacoustic 
      spectroscopy.
PG  - 96-109
LID - S1001-0742(18)31427-X [pii]
LID - 10.1016/j.jes.2019.01.022 [doi]
AB  - A field measurement campaign was carried out during the late winter and early 
      spring of 2015 in Budapest, the capital of Hungary. The size distribution (SD) 
      and optical absorption of carbonaceous particulate matter (CPM) was measured 
      online using a Scanning Mobility Particle Sizer (SMPS), a 7lambda-aethalometer and an 
      inhouse developed 4lambda-Photoacoustic Spectrometer. Based on the SD data, the 
      measurement period could be classified into days with and without new particle 
      formation events (normal days and nucleation days), although particular 
      nucleation-like events were observed on normal days as well. Three characteristic 
      size modes were observed with CMDs of circa 15, 25 and 110 nm that corresponded 
      to the nucleation, traffic and heating modes. Based on the temporal behavior of 
      these modes both types of days were divided into distinctive daily periods 
      (heating hours, traffic hours and nucleation hours). The optical absorption 
      spectra (OAC and AAE) also displayed the same part of day behavior to that of SD. 
      That way this paper is among the first to assess the optical response of urban 
      nucleation events. Due to the simultaneous measurement of OAC by the 
      7lambda-aethalometer and a 4lambda-Photoacoustic Spectrometer, OAC was measured overall at 
      11 wavelengths. That way aethalometer correction factors (f and C) were 
      determined at all aethalometer wavelengths using in situ reference photoacoustic 
      measurements. Correction factors were found to have both wavelength and time of 
      the day variation. In the case of f, no clear trend could be observed, however, 
      Cref values increased both as a function of wavelength.
CI  - Copyright (c) 2019. Published by Elsevier B.V.
FAU - Ajtai, Tibor
AU  - Ajtai T
AD  - Department of Optics and Quantum Electronics, University of Szeged, H-6720 
      Szeged, Hungary; MTA-SZTE Research Group on Photoacoustic Spectroscopy, H-6720 
      Szeged, Hungary; ELI-HU Non-Profit Ltd, H-6720 Szeged, Hungary. Electronic 
      address: ajtai@titan.physx.u-szeged.hu.
FAU - Kiss-Albert, Gergely
AU  - Kiss-Albert G
AD  - Department of Optics and Quantum Electronics, University of Szeged, H-6720 
      Szeged, Hungary; Hilase Development, Production, Service and Trading Limited, 
      Szekesfehervar H-8000, Hungary.
FAU - Utry, Noemi
AU  - Utry N
AD  - Department of Optics and Quantum Electronics, University of Szeged, H-6720 
      Szeged, Hungary; MTA-SZTE Research Group on Photoacoustic Spectroscopy, H-6720 
      Szeged, Hungary.
FAU - Toth, Adam
AU  - Toth A
AD  - Department of Earth and Environmental Sciences, University of Pannonia, P.O. Box 
      158, Veszprem H-8201, Hungary.
FAU - Hoffer, Andras
AU  - Hoffer A
AD  - MTA-PE Air Chemistry Research Group, P.O. Box 158, Veszprem H-8201, Hungary.
FAU - Szabo, Gabor
AU  - Szabo G
AD  - MTA-SZTE Research Group on Photoacoustic Spectroscopy, H-6720 Szeged, Hungary.
FAU - Bozoki, Zoltan
AU  - Bozoki Z
AD  - MTA-SZTE Research Group on Photoacoustic Spectroscopy, H-6720 Szeged, Hungary.
LA  - eng
PT  - Journal Article
DEP - 20190401
PL  - Netherlands
TA  - J Environ Sci (China)
JT  - Journal of environmental sciences (China)
JID - 100967627
RN  - 0 (Aerosols)
RN  - 0 (Air Pollutants)
RN  - 0 (Particulate Matter)
RN  - 7440-44-0 (Carbon)
MH  - Aerosols
MH  - Air Pollutants/*analysis
MH  - Carbon
MH  - Environmental Monitoring/*instrumentation/methods
MH  - Hungary
MH  - Particle Size
MH  - Particulate Matter/*analysis
MH  - Seasons
OTO - NOTNLM
OT  - Aerosol Angstrom exponent
OT  - Aethalometer
OT  - Nucleation
OT  - Photoacoustic spectroscopy
OT  - Size distribution
EDAT- 2019/06/22 06:00
MHDA- 2019/07/28 06:00
CRDT- 2019/06/22 06:00
PHST- 2018/05/24 00:00 [received]
PHST- 2019/01/28 00:00 [revised]
PHST- 2019/01/31 00:00 [accepted]
PHST- 2019/06/22 06:00 [entrez]
PHST- 2019/06/22 06:00 [pubmed]
PHST- 2019/07/28 06:00 [medline]
AID - S1001-0742(18)31427-X [pii]
AID - 10.1016/j.jes.2019.01.022 [doi]
PST - ppublish
SO  - J Environ Sci (China). 2019 Sep;83:96-109. doi: 10.1016/j.jes.2019.01.022. Epub 
      2019 Apr 1.