Analysis of some factors related to dust storms occurrence in the Sistan region

Soodabeh Namdari, Khalil Valizadeh Kamran, Armin Sorooshian

Research output: Contribution to journalArticlepeer-review

Abstract

Dust storms over the Sistan region in East Iran are associated with predominant northwest winds (called 120-day winds) which promote desertification, including drying of the Hamoun wetlands. These storms are more frequent in spring and summer seasons in the Sistan region. The study aims to examine the relationship between vegetation cover and wind speed with dust storms intensity in order to understand the behavior of dust sources using satellite remote sensing data (AOD) between 2000 and 2019. Based on the time series, the study period can be divided into three parts based on the following characteristics: high dust intensity (2004), moderate relative intensity of value in all parameters studied (2005 to 2014), and dust reduction (2015–2019). Time series analysis shows a negative relationship between AOD and wind speed owing presumably to vegetative cover changes during years that wind speed has increased. Based on multiple regression analysis by monthly time scales that conforms time series result, monthly NDVI is significantly related to AOD. Analysis of the 3 hourly wind data suggests a positive relationship between wind and dust, and effective thresholds for dust erosion based on wind speeds are proposed for the Sistan region.

Original languageEnglish (US)
Pages (from-to)45450-45458
Number of pages9
JournalEnvironmental Science and Pollution Research
Volume28
Issue number33
DOIs
StatePublished - Sep 2021

Keywords

  • AOD
  • Dust storm
  • MODIS Terra
  • NDVI
  • Satellite images
  • Sistan region
  • Wind speed

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

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