A cold air cyclogenesis study using potential vorticity inversion method

• Published in: Quarterly Journal of the Royal Meteorological Society
• Main Authors: Lambert, Dominique, Arbogast, Philippe, Cammas, Jean-Pierre, Donnadille, Jérôme, Mascart, Patrick
• Other Authors: Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2004
• Subjects: ARPEGE model; Fronts and Atlantic Storm-Track EXperiment; Surface temperature; [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]; [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology; Ice Shelf
• Online Access: https://hal.science/hal-00138153; https://hal.science/hal-00138153/document; https://hal.science/hal-00138153/file/Lambert2004.pdf; https://doi.org/10.1256/qj.03.37

A cold‐air cyclogenesis is studied using a potential vorticity (PV) inversion method. In this study, the method is coupled with the French spectral operational model ARPEGE which is initialized by four‐dimensional variational reanalyses. Sensitivity studies are performed for Intensive Observation Period 18 (IOP18) (low 44, 19–24 February 1997) of the Fronts and Atlantic Storm‐Track EXperiment (FASTEX). This event is one of the Type C cyclogeneses recently identified in the FASTEX dataset. The triggering role of a coherent tropopause disturbance on the cyclogenesis is discussed by comparing a reference forecast and a simulation in which the tropopause coherent structure is removed. Interactions between the atmospheric upper level and the cyclogenesis are found significant. A second important factor is the influence of the surface temperature. Evaluations of vertical motions for different surface temperature distributions show that the warmer the sea surface, the deeper the low. The location of the low with respect to the ice‐shelf limit is also an important factor.