Spatial variation of aerosol optical properties around the high-alpine site Jungfraujoch (3580 m a.s.l.)

dc.contributor.authorZieger, Paul
dc.contributor.authorKienast-Sjögren, Erika
dc.contributor.authorStarace, Michela
dc.contributor.authorvon Bismarck, Jonas
dc.contributor.authorBukowiecki, Nicolas
dc.contributor.authorBaltensperger, Urs
dc.contributor.authorWienhold, Frank Gunther
dc.contributor.authorPeter, Thomas
dc.contributor.authorRuhtz, Thomas
dc.contributor.authorCollaud Coen, Martine
dc.contributor.authorVuilleumier, Laurent
dc.contributor.authorMaier, Olaf
dc.contributor.authorEmili, Emanuele
dc.contributor.authorPopp, Christian
dc.contributor.authorWeingartner, Ernest
dc.date.accessioned2024-06-25T07:44:59Z
dc.date.available2024-06-25T07:44:59Z
dc.date.issued2012-08-08
dc.description.abstractThis paper presents results of the extensive field campaign CLACE 2010 (Cloud and Aerosol Characterization Experiment) performed in summer 2010 at the Jungfraujoch (JFJ) and the Kleine Scheidegg (KLS) in the Swiss Alps. The main goal of this campaign was to investigate the vertical variability of aerosol optical properties around the JFJ and to show the consistency of the different employed measurement techniques considering explicitly the effects of relative humidity (RH) on the aerosol light scattering. Various aerosol optical and microphysical parameters were recorded using in-situ and remote sensing techniques. In-situ measurements of aerosol size distribution, light scattering, light absorption and scattering enhancement due to water uptake were performed at the JFJ at 3580 m a.s.l.. A unique set-up allowed remote sensing measurements of aerosol columnar and vertical properties from the KLS located about 1500 m below and within the line of sight to the JFJ (horizontal distance of approx. 4.5 km). In addition, two satellite retrievals from the Spinning Enhanced Visible and Infrared Imager (SEVIRI) and the Moderate Resolution Imaging Spectroradiometer (MODIS) as well as back trajectory analyses were added to the comparison to account for a wider geographical context. All in-situ and remote sensing measurements were in clear correspondence. The ambient extinction coefficient measured in situ at the JFJ agreed well with the KLS-based LIDAR (Light Detection and Ranging) retrieval at the altitude-level of the JFJ under plausible assumptions on the LIDAR ratio. However, we can show that the quality of this comparison is affected by orographic effects due to the exposed location of the JFJ on a saddle between two mountains and next to a large glacier. The local RH around the JFJ was often higher than in the optical path of the LIDAR measurement, especially when the wind originated from the south via the glacier, leading to orographic clouds which remained lower than the LIDAR beam. Furthermore, the dominance of long-range transported Saharan dust was observed in all easurements for several days, however only for a shorter time period in the in-situ measurements due to the vertical structure of the dust plume. The optical properties of the aerosol column retrieved from SEVIRI and MODIS showed the same magnitude and a similar temporal evolution as the measurements at the KLS and the JFJ. Remaining differences are attributed to the complex terrain and simplifications in the aerosol retrieval scheme in general.
dc.identifier.doi10.5194/acp-12-7231-2012
dc.identifier.issn1680-7324
dc.identifier.issn1680-7316
dc.identifier.urihttps://irf.fhnw.ch/handle/11654/46247
dc.identifier.urihttps://doi.org/10.26041/fhnw-9365
dc.issue15
dc.language.isoen
dc.publisherCopernicus
dc.relation.ispartofAtmospheric Chemistry and Physics
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc550 - Geowissenschaften
dc.subject.ddc500 - Naturwissenschaften und Mathematik
dc.titleSpatial variation of aerosol optical properties around the high-alpine site Jungfraujoch (3580 m a.s.l.)
dc.type01A - Beitrag in wissenschaftlicher Zeitschrift
dc.volume12
dspace.entity.typePublication
fhnw.InventedHereNo
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publication
fhnw.affiliation.hochschuleHochschule für Technik und Umwelt FHNWde_CH
fhnw.affiliation.institutlnstitut für Sensorik und Elektronikde_CH
fhnw.openAccessCategoryGold
fhnw.pagination7231-7249
fhnw.publicationStatePublished
relation.isAuthorOfPublication05dd9a19-7a24-4325-805a-2d121483b168
relation.isAuthorOfPublication.latestForDiscovery05dd9a19-7a24-4325-805a-2d121483b168
Dateien

Originalbündel

Gerade angezeigt 1 - 1 von 1
Vorschaubild
Name:
acp-12-7231-2012.pdf
Größe:
3.37 MB
Format:
Adobe Portable Document Format

Lizenzbündel

Gerade angezeigt 1 - 1 von 1
Kein Vorschaubild vorhanden
Name:
license.txt
Größe:
1.36 KB
Format:
Item-specific license agreed upon to submission
Beschreibung: