caa a22 4500 445801026 CHVBK 20180317145141.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00704-010-0390-8 doi (NATIONALLICENCE)springer-10.1007/s00704-010-0390-8 Assessing characteristics of Mediterranean explosive cyclones for different data resolution [Elektronische Daten] [John Kouroutzoglou, Helena A. Flocas, Ian Simmonds, Kevin Keay, Maria Hatzaki] A comparison of two objective climatologies of explosive cyclones in the Mediterranean region is performed. The results are derived from two different mean sea-level pressure reanalysis data resolutions, but from the same assimilation model, in order to quantify the pure impact of higher resolution on the identification and characteristics of explosive cyclones, when the assimilation model is the same. The explosive cyclones were identified with the aid of the Melbourne University automatic cyclone finding and tracking scheme over a 40-year period, using the 6-hourly analyses of ERA-40 mean sea-level pressure (MSLP) on: (a) 2.5 × 2.5 and (b) 1 × 1 latitude-longitude grid. The comparison of the two datasets revealed the significant role of the increase in spatial resolution of MSLP data on the identification and tracking process, and the number of the explosive cyclones in the high-resolution dataset is almost four times greater than the respective one in the lower resolution dataset. However, the comparison of explosive cyclone characteristics, including spatial and temporal variations of explosive deepening, revealed differences in the geographical distribution of the location of the maximum explosive deepening and average explosive cyclone Laplacian of the central pressure. These differences are due to the identification in the higher resolution set of smaller scale and secondary explosives along the strongly baroclinic northern Mediterranean boundaries, south of the Alps and the Pyrenees. Explosive deepening appears a bias to the daytime period from 12 to 18 Coordinated Universal Time (UTC) for both datasets, which is more prominent in the LR dataset. Statistically significant difference of pressure tendency between the two datasets appear for the daytime period from 06 to 12 UTC, accounting for better representation of orographic forcing in the HR dataset. Springer-Verlag, 2011 Kouroutzoglou John Department of Environmental Physics-Meteorology, Faculty of Physics, University of Athens, Athens, Greece aut A. Flocas Helena Department of Environmental Physics-Meteorology, Faculty of Physics, University of Athens, Athens, Greece aut Simmonds Ian School of Earth Sciences, University of Melbourne, Melbourne, Australia aut Keay Kevin School of Earth Sciences, University of Melbourne, Melbourne, Australia aut Hatzaki Maria Department of Environmental Physics-Meteorology, Faculty of Physics, University of Athens, Athens, Greece aut Theoretical and Applied Climatology Springer Vienna 105/1-2(2011-08-01), 263-275 0177-798X 105:1-2<263 2011 105 704 https://doi.org/10.1007/s00704-010-0390-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00704-010-0390-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kouroutzoglou John Department of Environmental Physics-Meteorology, Faculty of Physics, University of Athens, Athens, Greece aut NATIONALLICENCE 700 1- A. Flocas Helena Department of Environmental Physics-Meteorology, Faculty of Physics, University of Athens, Athens, Greece aut NATIONALLICENCE 700 1- Simmonds Ian School of Earth Sciences, University of Melbourne, Melbourne, Australia aut NATIONALLICENCE 700 1- Keay Kevin School of Earth Sciences, University of Melbourne, Melbourne, Australia aut NATIONALLICENCE 700 1- Hatzaki Maria Department of Environmental Physics-Meteorology, Faculty of Physics, University of Athens, Athens, Greece aut NATIONALLICENCE 773 0- Theoretical and Applied Climatology Springer Vienna 105/1-2(2011-08-01), 263-275 0177-798X 105:1-2<263 2011 105 704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer