Spatio-temporal variability of dust aerosols over the Sistan region in Iran based on satellite observations

Show simple item record Rashki, Alireza Kaskaoutis, Dimitris G. Eriksson, Patrick George Rautenbach, Cornelis Johannes de Wet Flamant, C. Abdi Vishkaee, F. 2015-11-13T07:15:32Z 2015-11-13T07:15:32Z 2014-03
dc.description.abstract Satellite remote sensing provides important observational constraints for monitoring dust life cycle and improving the understanding of its effects on local to global scales. The present work analyses the dust-aerosol patterns over the arid environment of the Sistan region-in southeastern Iran, by means of multiple satellite platforms aiming to reveal the spatiotemporal distribution and trends. The dataset includes records of Aerosol Index (AI) from Total Ozone Mapping Spectrometer (TOMS) (1978–2001) and 6-year AI records from the Ozone Monitoring Instrument (OMI) aboard Aura. Moreover, the aerosol optical depth (AOD) is analyzed through 11-year records from Multi-angle Imaging Spectro-Radiometer (MISR) aboard Terra (2000-2010) and from Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Terra (2000-2007) and Aqua (2002-2011). The main focus is to determine similarities and differences in dust variability over southwest Asia, in general, and the Sistan region, in particular. The results show a marked seasonal cycle with high aerosol loading during summer and lower in winter, while MISR, MODIS and TOMS/OMI observations agree in both terms of monthly and seasonally mean spatial and temporal patterns. The higher aerosol concentrations during summer are interpreted as a result of the combined effect of the seasonal drying of the Hamoun lakes and the strong northerly Levar winds favoring dust erosion from the alluvial deposits in Sistan . After prolonged drought period, the dust-aerosol load over the area has increased in the beginning of the 2000s and decreased after 2004, thereby leading to an overall declining trend during the last decade. Such a trend is absent during the winter period when dust emission over the region is minimal. en_ZA
dc.description.librarian hb2015 en_ZA
dc.description.uri en_ZA
dc.identifier.citation Rashki, A, Kaskaoutis, DG, Eriksson, PG, Rautenbach, CJdeW, Flamant, C & Abdi Vishkaee, F 2014, 'Spatio-temporal variability of dust aerosols over the Sistan region in Iran based on satellite observations', Natural Hazards, vol. 71, no. 1, pp. 563-585. en_ZA
dc.identifier.issn 0921-030X (print)
dc.identifier.other 573-0840 (online)
dc.identifier.other 10.1007/s11069-013-0927-0
dc.language.iso en en_ZA
dc.publisher Springer en_ZA
dc.rights © Springer Science+Business Media Dordrecht 2013. The original publication is available at : http://link.springer.comjournal/11069. en_ZA
dc.subject Aerosol variability en_ZA
dc.subject Remote sensing en_ZA
dc.subject Dust en_ZA
dc.subject Sistan en_ZA
dc.subject Hamoun lakes en_ZA
dc.subject Total ozone mapping spectrometer (TOMS) en_ZA
dc.subject Aerosol optical depth (AOD) en_ZA
dc.subject Moderate resolution imaging spectroradiometer (MODIS) en_ZA
dc.subject Ozone monitoring instrument (OMI) en_ZA
dc.title Spatio-temporal variability of dust aerosols over the Sistan region in Iran based on satellite observations en_ZA
dc.type Postprint Article en_ZA

Files in this item

This item appears in the following Collection(s)

Show simple item record