1. Elliptical Structures of Gravity Waves Produced by Typhoon Soudelor in 2015 near Taiwan
- Author
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Chane-Ming, Fabrice, Jolivet, Samuel, Jegou, Fabrice, Mékies, Dominique, Hong, Jing-Shan, Liou, Yuei-An, Laboratoire de l'Atmosphère et des Cyclones (LACy), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Meteobooking, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National d’Études Spatiales [Paris] (CNES), Central Weather Bureau, Center for Space and Remote Sensing Research [Taïwan] (CSRSR), National Central University [Taiwan] (NCU), This work was financially supported by grants from the ANRT (CIFRE 2015/0876), French ANR (BOOST3R ANR-17-CE01-0016-01) and Taiwanese MOST (105-2221-E-008-056-MY3, 107-2111-M-008-036). It was performed using HPC resources from GENCI-[TGCC/CINES/IDRIS] (Grant 2017 [A0010107689]) and the University of La Réunion. The WRF-ARW model and NCL software (http://dx.doi.org/10.5065/D6WD3XH5) were provided by the National Center for Atmospheric Research (NCAR). FormoSat-3/COSMIC RO data were obtained from CDAAC (COSMIC Data Analysis and Archive Center): http://cdaac-www.cosmic.ucar.edu. In-situ Taiwanese meteorological data were provided by the Central Weather Bureau., and ANR-17-CE01-0016,BOOST3R,Observations par Ballons et Modélisation pour la Tropopause et la Basse Stratosphère dans les Tropiques(2017)
- Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere ,gravity wave ,tropical cyclone ,Weather Research and Forecasting (WRF) model ,lcsh:Meteorology. Climatology ,lcsh:QC851-999 ,FormoSat-3/COSMIC - Abstract
Tropical cyclones (TCs) are complex sources of atmospheric gravity waves (GWs). In this study, the Weather Research and Forecasting Model was used to model TC Soudelor (2015) and the induced elliptical structures of GWs in the upper troposphere (UT) and lower stratosphere (LS) prior to its landfall over Taiwan. Conventional, spectral and wavelet analyses exhibit dominant GWs with horizontal and vertical wavelengths, and periods of 16&ndash, 700 km, 1.5&ndash, 5 km, and 1&ndash, 20 h, respectively. The wave number one (WN1) wind asymmetry generated mesoscale inertia GWs with dominant horizontal wavelengths of 100&ndash, 300 km, vertical wavelengths of 1.5&ndash, 2.5 km (3.5 km) and westward (eastward) propagation at the rear of the TC in the UT (LS). It was also revealed to be an active source of GWs. The two warm anomalies of the TC core induced two quasi-diurnal GWs and an intermediate GW mode with a 10-h period. The time evolution of dominant periods could be indicative of changes in TC dynamics. The FormoSat-3/COSMIC (Formosa Satellite Mission-3/Constellation Observing System for Meteorology, Ionosphere, and Climate) dataset confirmed the presence of GWs with dominant vertical wavelengths of about 3.5 km in the UT and LS.
- Published
- 2019
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