Climate Change and Climate Disaster

Synoptic analysis of maximum rainfall in southwest Iran A case study: maximum rainfall in March - April 2019

Document Type : Original Article

Authors

fatemeh Motevali Meydanshah 1
Hossein Asakereh 2

1 PHD student of climatology- Zanjan University

2 Professor of Climatology University of Zanjan

10.30740/cccd.2025.737313
Abstract
Rainfall is one of the most challenging atmospheric-climatic parameters that has significant effects on different scales. In the modern world, water, whose main source is precipitation, plays an important role in the life of humanity. In the present research, a synoptic analysis of the maximum rainfall during March - April 2019 was conducted using the daily rainfall data extracted from synoptic data and the daily data of geopotential height, relative humidity, sea level pressure, vertical winds flow, and zonal and meridian winds for the south and southwest of Iran (including Lorestan, Ilam, Kohgiloye and Boyer Ahmad, Chaharmahal Bakhtiari, Khuzestan, Bushehr, and Fars). The results of analyzing the synoptic maps on the rainy days of April indicated the presence and continuation of a deep trough and a blocking pattern at the level of 500 hPa along with the bifurcation of the wind flow at the level of 200 hPa, upward movements and low pressure on the ground surface, advection of relative humidity above 80%, and hot air advection at the levels of 700 and 850 hPa in the study area.

Keywords

Maxmum precipitation
synoptic analysis
atmospheric parameters
southwest Iran

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