Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshah
One of the most devastating phenomena of meteorology which varies extensively in spatial and temporal extent and manifests itself at various scales, is thunderstorms. The purpose of this study was to identify and analyze such destructive storms over a period of 25 years (1986-2010) at the synoptic s...
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| Format: | Article |
| Language: | fas |
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University of Tabriz
2019-11-01
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| Series: | نشریه جغرافیا و برنامهریزی |
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| Online Access: | https://geoplanning.tabrizu.ac.ir/article_9755_7fb8d5c64ceed08a60957520be0e1e8d.pdf |
| _version_ | 1797256919332683776 |
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| author | esmaeil abbasi mahdi khazayi |
| author_facet | esmaeil abbasi mahdi khazayi |
| author_sort | esmaeil abbasi |
| collection | DOAJ |
| description | One of the most devastating phenomena of meteorology which varies extensively in spatial and temporal extent and manifests itself at various scales, is thunderstorms. The purpose of this study was to identify and analyze such destructive storms over a period of 25 years (1986-2010) at the synoptic station of Kermanshah. The data used in this research includes daily rainfall data and codes related to meteorological phenomena, dry temperature, dew point, relative humidity, wind direction and wind speed for calculation of instability indices, geopotential height parameters, specific humidity, vertical velocity, and zonal and meridional components. The results showed that during the statistical period of the study, three extreme thunderstorms occurred in the study area during the statistical period of 25 years. The study of instability indices indicates that these indices are in the strong and suitable category for the occurrence of thunderstorm phenomenon; in addition, the dynamics of the atmosphere at the time of the occurrence of this phenomenon indicates the presence of a very deep trough and negative abnormalities in the west of the studied region and positioning of the left half of the Jetstream of levels of 500 and 850 millimeters on the studied area. Following this phenomenon, the thunderstorm intensely affected the region by its destructive effects with the formation of clouds of cumulus and lightning, and finally, heavy rainfall. However, it should be mentioned that for two cases, that is, the phenomenon of February 4, 2007 and December 12, 1991, they experience a more unstable climate due to the average circulation patterns compared to the other identified case, i.e. the phenomenon of April 17, 1991. |
| first_indexed | 2024-04-24T22:29:23Z |
| format | Article |
| id | doaj.art-6ae2b48962bf4a649bf49b85fbc13bdb |
| institution | Directory Open Access Journal |
| issn | 2008-8078 2717-3534 |
| language | fas |
| last_indexed | 2024-04-24T22:29:23Z |
| publishDate | 2019-11-01 |
| publisher | University of Tabriz |
| record_format | Article |
| series | نشریه جغرافیا و برنامهریزی |
| spelling | doaj.art-6ae2b48962bf4a649bf49b85fbc13bdb2024-03-19T22:09:05ZfasUniversity of Tabrizنشریه جغرافیا و برنامهریزی2008-80782717-35342019-11-0123691751909755Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshahesmaeil abbasi0mahdi khazayi1Environment, persian Gulf UniversityدانشجوOne of the most devastating phenomena of meteorology which varies extensively in spatial and temporal extent and manifests itself at various scales, is thunderstorms. The purpose of this study was to identify and analyze such destructive storms over a period of 25 years (1986-2010) at the synoptic station of Kermanshah. The data used in this research includes daily rainfall data and codes related to meteorological phenomena, dry temperature, dew point, relative humidity, wind direction and wind speed for calculation of instability indices, geopotential height parameters, specific humidity, vertical velocity, and zonal and meridional components. The results showed that during the statistical period of the study, three extreme thunderstorms occurred in the study area during the statistical period of 25 years. The study of instability indices indicates that these indices are in the strong and suitable category for the occurrence of thunderstorm phenomenon; in addition, the dynamics of the atmosphere at the time of the occurrence of this phenomenon indicates the presence of a very deep trough and negative abnormalities in the west of the studied region and positioning of the left half of the Jetstream of levels of 500 and 850 millimeters on the studied area. Following this phenomenon, the thunderstorm intensely affected the region by its destructive effects with the formation of clouds of cumulus and lightning, and finally, heavy rainfall. However, it should be mentioned that for two cases, that is, the phenomenon of February 4, 2007 and December 12, 1991, they experience a more unstable climate due to the average circulation patterns compared to the other identified case, i.e. the phenomenon of April 17, 1991.https://geoplanning.tabrizu.ac.ir/article_9755_7fb8d5c64ceed08a60957520be0e1e8d.pdfthunderstormsinstability indicesatmospheric circulation patternskermanshah synoptic station |
| spellingShingle | esmaeil abbasi mahdi khazayi Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshah نشریه جغرافیا و برنامهریزی thunderstorms instability indices atmospheric circulation patterns kermanshah synoptic station |
| title | Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshah |
| title_full | Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshah |
| title_fullStr | Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshah |
| title_full_unstemmed | Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshah |
| title_short | Identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of Kermanshah |
| title_sort | identification and analysis of the simultaneously conditions with the severe thunderstorm events at the synoptic station of kermanshah |
| topic | thunderstorms instability indices atmospheric circulation patterns kermanshah synoptic station |
| url | https://geoplanning.tabrizu.ac.ir/article_9755_7fb8d5c64ceed08a60957520be0e1e8d.pdf |
| work_keys_str_mv | AT esmaeilabbasi identificationandanalysisofthesimultaneouslyconditionswiththeseverethunderstormeventsatthesynopticstationofkermanshah AT mahdikhazayi identificationandanalysisofthesimultaneouslyconditionswiththeseverethunderstormeventsatthesynopticstationofkermanshah |