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On the relationship between water vapour field evolution and the life cycle of precipitation systems

van Baelen, Joel und Reverdy, M. und Tridon, F. und Labbouz, L. und Dick, G. und Bender, M. und Hagen, Martin (2011) On the relationship between water vapour field evolution and the life cycle of precipitation systems. Quarterly Journal of the Royal Meteorological Society, 137, Seiten 204-223. DOI: 10.1002/qj.785

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Offizielle URL: http://onlinelibrary.wiley.com/doi/10.1002/qj.785/abstract


In this work, we investigate the relationship between the structure and evolution (from initiation to decay) of precipitation systems, and the associated water vapour distributions during the COPS (Convective Orographically-induced Precipitation Study). This international field campaign took place over an area from the Vosges to the Black Forest Mountains, across the Rhine Valley, in summer 2007. In particular, we consider water vapour retrieval through GPS integrated water vapour 2D maps and 3D tomography, and compare these to precipitation systems observed with the ground-based C-band POLDIRAD weather radar. We have demonstrated the predominant role of water vapour as a precursor to convective initiation for local convective cell generation. Water vapour accumulation on the crest of the orography is associated with ridge convection, while water vapour passing over the mountain top and creating valley outflows generates lee-side convection, often triggered by a small hill positioned within or close to the valley exit, or by a local convergence with the water vapour field over the plain. We have also noted that frontal systems seem to develop preferentially where the largest amount of water vapour is available. Likewise, in the case of frontal systems, well-formed synoptic-scale storms are associated with high water vapour signatures, while weaker systems with embedded convection appear to trail high water vapour areas where the convective element is associated with local water vapour depletion. This latter aspect could be the signature of convective cloud formation, when water vapour is transferred into liquid water, before the onset of precipitation

Titel:On the relationship between water vapour field evolution and the life cycle of precipitation systems
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iD
van Baelen, JoelUniv. de Clermont-Ferrand, FNICHT SPEZIFIZIERT
Reverdy, M.Univ. de Clermont-Ferrand, FNICHT SPEZIFIZIERT
Tridon, F.Univ. de Clermont-Ferrand, FNICHT SPEZIFIZIERT
Labbouz, L.Univ. de Clermont-Ferrand, FNICHT SPEZIFIZIERT
Hagen, Martinmartin.hagen@dlr.deNICHT SPEZIFIZIERT
Erschienen in:Quarterly Journal of the Royal Meteorological Society
Referierte Publikation:Ja
In Open Access:Nein
In ISI Web of Science:Ja
DOI :10.1002/qj.785
Seitenbereich:Seiten 204-223
Stichwörter:COPS; eather radar; orography; GPS
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Atmosphären- und Klimaforschung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie
Hinterlegt von: Freund, Jana
Hinterlegt am:20 Jun 2011 15:53
Letzte Änderung:13 Feb 2013 15:05

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