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Aerosol layers from the 2008 eruptions of Mount Okmok and Mount Kasatochi: In situ upper troposphere and lower stratosphere measurements of sulfate and organics over Europe

Schmale, Julia und Schneider, Johannes und Jurkat, Tina und Voigt, Christiane und Kalesse, Heike und Rautenhaus, Marc und Lichtenstern, Michael und Schlager, Hans und Ancellet, Gerard und Arnold, Frank und Gerding, Michael und Mattis, Ina (2010) Aerosol layers from the 2008 eruptions of Mount Okmok and Mount Kasatochi: In situ upper troposphere and lower stratosphere measurements of sulfate and organics over Europe. Journal of Geophysical Research, 115 (D00L07), Seiten 1-18. AGU. DOI: 10.1029/2009JD013628.

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Offizielle URL: http://dx.doi.org/10.1029/2009JD013628

Kurzfassung

In 2008 Mount Okmok and Mount Kasatochi started erupting on 12 July and 7 August, respectively, in the Aleutians, depositing emissions of trace gases and aerosols as high as 15.2 km into the atmosphere. During an aircraft campaign, conducted over Europe in between 27 October and 2 November 2008, the volcanic aerosol was measured by an Aerodyne aerosol mass spectrometer, capable of particle chemical composition measurements covering a size diameter range between 40 nm and 1 mm. In the volcanic aerosol layer enhanced submicron particulate sulfate concentrations of up to 2.0 mg m−3 standard temperature and pressure (STP) were observed between 8 and 12 km altitude, while background values did not exceed 0.5 mg m−3 (STP). Twenty‐one percent of the volcanic aerosol consisted of carbonaceous material that increased by a factor of 1.9 in mass compared to the free troposphere. Enhanced gaseous sulfur dioxide concentrations measured by an ion trap chemical ionization mass spectrometer of up to 1.3 mg m−3 were encountered. An onboard radiation measurement system simultaneously detected an enhanced aerosol signal. Furthermore, two German lidar stations identified an aerosol layer before and after the campaign. Data analysis shows that the aerosol layer was observed mainly in the lowermost stratosphere. Correlation of particulate sulfate concentration and sulfur dioxide mixing ratios indicates that after a 3 month residence time in the stratosphere, not all sulfur dioxide has been converted into sulfate aerosol. The significant fraction of organic material might have implications on heterogeneous chemistry in the stratosphere, which need to be explored more thoroughly.

Dokumentart:Zeitschriftenbeitrag
Titel:Aerosol layers from the 2008 eruptions of Mount Okmok and Mount Kasatochi: In situ upper troposphere and lower stratosphere measurements of sulfate and organics over Europe
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Schmale, JuliaMPIC
Schneider, JohannesMPIC
Jurkat, TinaDLR
Voigt, ChristianeDLR/J. Gutenberg Univ.
Kalesse, HeikeJ. Gutenberg Univ.
Rautenhaus, MarcDLR
Lichtenstern, MichaelDLR
Schlager, HansDLR
Ancellet, GerardLATMOS
Arnold, FrankMPI-K/DLR
Gerding, MichaelLeibniz Inst. for Tropospheric Research
Mattis, InaLeibniz Inst. for Tropospheric Research
Datum:17 September 2010
Erschienen in:Journal of Geophysical Research
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:115
DOI :10.1029/2009JD013628
Seitenbereich:Seiten 1-18
Verlag:AGU
Status:veröffentlicht
Stichwörter:volcanic aerosol volcanic aerosol, aerosol mass spectrometry, Kasatochi, airborne aerosol measurements
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:ATM und Flugbetrieb
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AO - Luftverkehrsmanagement und Flugbetrieb
DLR - Teilgebiet (Projekt, Vorhaben):L - Klima, Wetter und Umwelt
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Tina Jurkat
Hinterlegt am:16 Dez 2010 12:23
Letzte Änderung:23 Jan 2014 11:36

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