The use of IDV software in synoptic-dynamic analysis of moisture flux of heavy Rainfalls 
 (Case study: Heavy Rainfalls from 25 to 30 February 2015 in Iran)

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Jalilian Azar; Zolfaghari Hasan

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Journal Paper

Paper Information

Journal: Climate Change and Climate Disaster Year:2024 | Volume:3 | Issue:5 Page(s): -

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Information Journal Paper

Title

The use of IDV software in synoptic-dynamic analysis of moisture flux of heavy Rainfalls (Case study: Heavy Rainfalls from 25 to 30 February 2015 in Iran)

Author(s)

Jalilian Azar | Zolfaghari Hasan | Issue Writer Certificate

Keywords

Keywords: heavy precipitation

horizontal convergence

vertical velocity

Moisture flux

IDV software

Abstract

AbstractHeavy rainfall leads to floods, among other natural disasters, which is also considered as a climate hazard. In this research, it has been tried to show the connection and continuity of the atmospheric components in the entire vertical column of the atmosphere with the synoptic-dynamic interpretation of these precipitations.Therefore, after obtaining the data of geopotential height (in meters), orbital and meridional wind components (meters per second), divergence (s-1), specific humidity (g/kg) and humidity (s-1) from the study center In the mid-term of Europe (in the spatial range of 0 to 80 degrees east longitude and 10 to 70 degrees north latitude), the influence of the synoptic pattern of the atmosphere on the dynamics, continuity and connection of these components is displayed using IDV software.The results of the drawing and analysis of the atmospheric components affecting the precipitation show that in the heavy rain wave from 25 to 30 February 2015, the strong meridian pattern with a level height of 500 hpa and the activity of the STJ cyclonic circulation in the region were effective factors in intensifying the instability of the atmosphere. This pattern, by strengthening the horizontal convergence of the atmosphere and intensifying the convergence of inward flow of moisture from several sources such as the Mediterranean, the Red Sea, the Persian Gulf, the Sea of Oman, etc., has led to the occurrence of heavy and widespread rainfall in 68 synoptic stations in Iran

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