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Climatology ofCyclones and TheirTracking over Southern Coasts ofCaspian Sea | ||
International Journal of Environmental Research | ||
مقاله 15، دوره 9، شماره 1، فروردین 2015، صفحه 117-132 اصل مقاله (2.96 M) | ||
نوع مقاله: Original Research Paper | ||
شناسه دیجیتال (DOI): 10.22059/ijer.2015.881 | ||
نویسندگان | ||
M. Molanejad* 1؛ M. Soltani2؛ A. Ranjbar SaadatAbadi3؛ C.A. Babu4؛ M. Sohrabi5؛ M.V. Martin6 | ||
1Iranian Research Organization for Science andTechnology (IROST), Tehran, Iran. IORA- Regional Center for Science and Technology Transfer, Tehran, Iran | ||
2Department of Physical Geography, Faculty of Geography, University of Tehran, Iran | ||
3Atmospheric Sciences andMeteorological Research Center (ASMERC) of I. R. of IranMeteorological Organization (IRIMO), Tehran, Iran | ||
4Department ofAtmospheric Sciences, CochinUniversityof Science andTechnology, Cochin 682 016, India | ||
5Department of Biological andAgricultural Engineering, University of Idaho, Boise, ID 83702,USA | ||
6Centre for Oceans, Rivers,Atmosphere and Land Sciences (CORAL), Indian Institute ofTechnology, Kharagpur, India | ||
چکیده | ||
The southern coasts of Caspian Sea is subjected to synoptic/mesoscale weather systems ranging from locally enhanced sea breeze formation and small local front systems to synoptic scale cyclones. This study presents climatology of cyclones over the southern coasts of Caspian Sea covering a ten year period 1996-2005. Altogether 57 cyclones were formed during the ten year period. Anoticeable seasonality is observed in evolution of cyclones over the entire Caspian region, a majority of the 57 cyclones (73.7%) were developed during winter and fall seasons while the remaining (26.3%) occurred during spring and summer seasons.Most of the cyclones were of low intensity, out of 57 cyclones observed during the ten year period 16 (28%) were deep depressions and 24 (42.1%) were cyclonic storms. Altogether 5 super cyclonic storms were observed during the period, out of which 4 were observed during winter and fall seasons. Mid-tropospheric, large-scale processes and local features were responsible for the initial development of all weather systems. The Mediterranean Sea plays a significant role in cyclogenesis and propagation of the systems the Caspian region. Further, a Mediterranean cyclonic system formed during October 2001 was studied in detail using backward trajectory Lagrangian model: Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT). The HYSPLIT model outputs confirmed the observed synoptic features for the weather system of the case study. | ||
کلیدواژهها | ||
High-pressure systems؛ Mid-latitude cyclones؛ Moisture convergence؛ HYSPLIT؛ Tracking؛ North of Iran | ||
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