Research Article

Investigation of Vorticity during Prevalent Winter Precipitation in Iran

Table 1

Some of the characteristics of identified patterns of prevalent winter precipitation in Iran.

1000 hPa vorticity patternsPrevalence percentageOverall precipitationFrequency

Mediterranean low pressure-low-pressure dual-core Persian Gulf50.132360377
Iran closed low pressure-high pressure of east Europe81.035582473
Low pressure of Ural-high pressure of the Middle East56.992409660
European high pressure-low pressure of Saudi Arabia58.314419152
High-pressure belt of Siberia-low pressure of central Iran55.322397693