Chemical analysis of the Asian tropopause aerosol layer (ATAL) with emphasis on secondary aerosol particles using aircraft-based in situ aerosol mass spectrometry

Publication type:
Journal article
Metadata:
Autoren
  • Oliver Appel
  • Franziska Koellner
  • Antonis Dragoneas
  • Andreas Huenig
  • Sergej Molleker
  • Hans Schlager
  • Christoph Mahnke
  • Ralf Weigel
  • Max Port
  • Christiane Schulz
  • Frank Drewnick
  • Baerbel Vogel
  • Fred Stroh
  • Stephan Borrmann
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000870227500001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.5194/acp-22-13607-2022
eISSN
1680-7324
Externe Identifier
  • Clarivate Analytics Document Solution ID: 5L2EH
ISSN
1680-7316
Ausgabe der Veröffentlichung
20
Zeitschrift
ATMOSPHERIC CHEMISTRY AND PHYSICS
Paginierung
13607 - 13630
Datum der Veröffentlichung
2022
Status
Published
Titel
Chemical analysis of the Asian tropopause aerosol layer (ATAL) with emphasis on secondary aerosol particles using aircraft-based in situ aerosol mass spectrometry
Sub types
  • Article
Ausgabe der Zeitschrift
22

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:p>Abstract. Aircraft-borne in situ measurements of the chemical aerosol composition were conducted in the Asian tropopause aerosol layer (ATAL) over the Indian subcontinent in the summer of 2017, covering particle sizes below ∼3 µm. We have implemented a recently developed aerosol mass spectrometer, which adopts the laser desorption technique as well as the thermal desorption method for quantitative bulk information (i.e., a modified Aerodyne AMS), aboard the high-altitude research aircraft M-55 Geophysica. The instrument was deployed in July and August 2017 during the StratoClim EU campaign (Stratospheric and upper tropospheric processes for better Climate predictions) over Nepal, India, Bangladesh, and the Bay of Bengal, covering altitudes up to 20 kma.s.l. For particles with diameters between 10 nm and ∼3 µm, the vertical profiles of aerosol number densities from the eight research flights show significant enhancements in the altitude range of the ATAL. We observed enhancements in the mass concentrations of particulate nitrate, ammonium, and organics in a similar altitude range between approximately 13 and 18 km (corresponding to 360 and 410 K potential temperature). By means of the two aerosol mass spectrometry techniques, we show that the particles in the ATAL mainly consist of ammonium nitrate (AN) and organics. The single-particle analysis from laser desorption and ionization mass spectrometry revealed that a significant particle fraction (up to 70 % of all analyzed particles by number) within the ATAL results from the conversion of inorganic and organic gas-phase precursors, rather than from the uplift of primary particles from below. This can be inferred from the fact that the majority of the particles encountered in the ATAL consisted solely of secondary substances, namely an internal mixture of nitrate, ammonium, sulfate, and organic matter. These particles are externally mixed with particles containing primary components as well. The single-particle analysis suggests that the organic matter within the ATAL and in the lower stratosphere (even above 420 K) can partly be identified as organosulfates (OS), in particular glycolic acid sulfate, which are known as components indicative for secondary organic aerosol (SOA) formation. Additionally, the secondary particles are smaller in size compared to those containing primary components (mainly potassium, metals, and elemental carbon). The analysis of particulate organics with the thermal desorption method shows that the degree of oxidation for particles observed in the ATAL is consistent with expectations about secondary organics that were subject to photochemical processing and aging. We found that organic aerosol was less oxidized in lower regions of the ATAL (&lt;380 K) compared to higher altitudes (here 390–420 K). These results suggest that particles formed in the lower ATAL are uplifted by prevailing diabatic heating processes and thereby subject to extensive oxidative aging. Thus, our observations are consistent with the concept of precursor gases being emitted from regional ground sources, subjected to rapid convective uplift, and followed by secondary particle formation and growth in the upper troposphere within the confinement of the Asian monsoon anticyclone (AMA). As a consequence, the chemical composition of these particles largely differs from the aerosol in the lower stratospheric background and the Junge layer. </jats:p>
Autoren
  • Oliver Appel
  • Franziska Köllner
  • Antonis Dragoneas
  • Andreas Hünig
  • Sergej Molleker
  • Hans Schlager
  • Christoph Mahnke
  • Ralf Weigel
  • Max Port
  • Christiane Schulz
  • Frank Drewnick
  • Bärbel Vogel
  • Fred Stroh
  • Stephan Borrmann
DOI
10.5194/acp-22-13607-2022
eISSN
1680-7324
Ausgabe der Veröffentlichung
20
Zeitschrift
Atmospheric Chemistry and Physics
Sprache
en
Online publication date
2022
Paginierung
13607 - 13630
Status
Published online
Herausgeber
Copernicus GmbH
Herausgeber URL
http://dx.doi.org/10.5194/acp-22-13607-2022
Datum der Datenerfassung
2022
Titel
Chemical analysis of the Asian tropopause aerosol layer (ATAL) with emphasis on secondary aerosol particles using aircraft-based in situ aerosol mass spectrometry
Ausgabe der Zeitschrift
22

Data source: Crossref

Author's licence
CC-BY
Autoren
  • Oliver Appel
  • Franziska Köllner
  • Antonis Dragoneas
  • Andreas Hünig
  • Sergej Molleker
  • Hans Schlager
  • Christoph Maohnke
  • Ralf Weigel
  • Max Port
  • Christiane Schulz
  • Frank Drewnick
  • Bärbel Vogel
  • Fred Stroh
  • Stephan Borrmann
Hosting institution
Universitätsbibliothek Mainz
Sammlungen
  • JGU-Publikationen
Resource version
Published version
DOI
10.5194/acp-22-13607-2022
File(s) embargoed
false
Open access
true
ISSN
1680-7375
Zeitschrift
Atmospheric Chemistry and Physics
Schlüsselwörter
  • 624 Ingenieurbau und Umwelttechnik
  • 624 Civil engineering
  • 660 Technische Chemie
  • 660 Chemical engineering
Sprache
eng
Open access status
Open Access
Paginierung
13607 - 13630
Datum der Veröffentlichung
2022
Public URL
https://openscience.ub.uni-mainz.de/handle/20.500.12030/8850
Herausgeber
Copernicus GmbH EGU
Datum der Datenerfassung
2023
Datum, an dem der Datensatz öffentlich gemacht wurde
2023
Zugang
Public
Titel
Chemical analysis of the Asian tropopause aerosol layer (ATAL) with emphasis on secondary aerosol particles using aircraft-based in situ aerosol mass spectrometry
Ausgabe der Zeitschrift
22

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