Investigation of Vorticity during Prevalent Winter Precipitation in Iran
In this study, precipitation data for 483 synoptic stations, and the U&V component of wind and HGT data for 4 atmospheric levels were respectively obtained from IRIMO and NCEP/NCAR databases (1961–2013). The precipitation threshold of 1 mm and a minimum prevalence of 50% were the criteria based...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2018/6941501 |
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| author | Iman Rousta Farshad Javadizadeh Fatemeh Dargahian Haraldur Ólafsson Amin Shiri-Karimvandi Sayed Hossein Vahedinejad Mehdi Doostkamian Edgar Ricardo Monroy Vargas Anayat Asadolahi |
| author_facet | Iman Rousta Farshad Javadizadeh Fatemeh Dargahian Haraldur Ólafsson Amin Shiri-Karimvandi Sayed Hossein Vahedinejad Mehdi Doostkamian Edgar Ricardo Monroy Vargas Anayat Asadolahi |
| author_sort | Iman Rousta |
| collection | DOAJ |
| description | In this study, precipitation data for 483 synoptic stations, and the U&V component of wind and HGT data for 4 atmospheric levels were respectively obtained from IRIMO and NCEP/NCAR databases (1961–2013). The precipitation threshold of 1 mm and a minimum prevalence of 50% were the criteria based on which the prevalent precipitation of Iran was identified. Then, vorticity of days corresponding to prevalent winter precipitation was calculated and, by performing cluster analysis, the representative days of vorticity were specified. The results showed that prevalent winter precipitation vorticity in Iran is related to the vorticity patterns of low pressure of Mediterranean-low pressure of Persian Gulf dual-core, low pressure closed of central Iran-high pressure of East Europe, Ural low pressure-Middle East High pressure, Saudi Arabia low pressure-Europe high pressure, and high-pressure belt of Siberia-low pressure of central Iran. At the same time, the most intense vorticity occurred when the climate of Iran was influenced by a massive belt pattern of Siberian high pressure-low pressure of central Iran. However, at the time of prevalent winter precipitation in Iran, an intense vorticity is drawn with the direction of Northeast and Northwest from the center of Iraq to the south of Iran. |
| format | Article |
| id | doaj-art-8ec895eb99b346d7b2f436321c3f6409 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-8ec895eb99b346d7b2f436321c3f64092025-02-03T07:25:58ZengWileyAdvances in Meteorology1687-93091687-93172018-01-01201810.1155/2018/69415016941501Investigation of Vorticity during Prevalent Winter Precipitation in IranIman Rousta0Farshad Javadizadeh1Fatemeh Dargahian2Haraldur Ólafsson3Amin Shiri-Karimvandi4Sayed Hossein Vahedinejad5Mehdi Doostkamian6Edgar Ricardo Monroy Vargas7Anayat Asadolahi8Department of Geography, Yazd University, Yazd 8915818411, IranDepartment of Environment, Collage of Natural Resource, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, IranDesert Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, IranDepartment of Physics, University of Iceland, Institute for Atmospheric Sciences and Icelandic Meteororological Office (IMO), Bustadavegur 7, IS-108 ReykjaviK, IcelandDepartment of Geography, University of Zanjan, Zanjan 3879145371, IranDepartment of Geography, University of Kharazmi, Tehran 1491115719, IranDepartment of Geography, University of Zanjan, Zanjan 3879145371, IranDepartment of Civil Engineering, Universidad Catolica de Colombia, Bogotá, ColombiaDepartment of Geography, University of Zanjan, Zanjan 3879145371, IranIn this study, precipitation data for 483 synoptic stations, and the U&V component of wind and HGT data for 4 atmospheric levels were respectively obtained from IRIMO and NCEP/NCAR databases (1961–2013). The precipitation threshold of 1 mm and a minimum prevalence of 50% were the criteria based on which the prevalent precipitation of Iran was identified. Then, vorticity of days corresponding to prevalent winter precipitation was calculated and, by performing cluster analysis, the representative days of vorticity were specified. The results showed that prevalent winter precipitation vorticity in Iran is related to the vorticity patterns of low pressure of Mediterranean-low pressure of Persian Gulf dual-core, low pressure closed of central Iran-high pressure of East Europe, Ural low pressure-Middle East High pressure, Saudi Arabia low pressure-Europe high pressure, and high-pressure belt of Siberia-low pressure of central Iran. At the same time, the most intense vorticity occurred when the climate of Iran was influenced by a massive belt pattern of Siberian high pressure-low pressure of central Iran. However, at the time of prevalent winter precipitation in Iran, an intense vorticity is drawn with the direction of Northeast and Northwest from the center of Iraq to the south of Iran.http://dx.doi.org/10.1155/2018/6941501 |
| spellingShingle | Iman Rousta Farshad Javadizadeh Fatemeh Dargahian Haraldur Ólafsson Amin Shiri-Karimvandi Sayed Hossein Vahedinejad Mehdi Doostkamian Edgar Ricardo Monroy Vargas Anayat Asadolahi Investigation of Vorticity during Prevalent Winter Precipitation in Iran Advances in Meteorology |
| title | Investigation of Vorticity during Prevalent Winter Precipitation in Iran |
| title_full | Investigation of Vorticity during Prevalent Winter Precipitation in Iran |
| title_fullStr | Investigation of Vorticity during Prevalent Winter Precipitation in Iran |
| title_full_unstemmed | Investigation of Vorticity during Prevalent Winter Precipitation in Iran |
| title_short | Investigation of Vorticity during Prevalent Winter Precipitation in Iran |
| title_sort | investigation of vorticity during prevalent winter precipitation in iran |
| url | http://dx.doi.org/10.1155/2018/6941501 |
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