Effect of Saharan Dust Intrusions on Precipitation Chemistry in Bulgaria
Effect of Saharan Dust Intrusions on Precipitation Chemistry in Bulgaria

Author(s): Emilia Georgieva, Elena Hristova, Blagorodka Veleva
Subject(s): Economy, National Economy, Supranational / Global Economy, Business Economy / Management, Energy and Environmental Studies
Published by: Национално издателство за образование и наука „Аз-буки“
Keywords: precipitation chemistry; Saharan dust; field campaigns; dust models; satellite AOD
Summary/Abstract: The objective of this work is to investigate the influence of Saharan dust events on the chemical composition of rain samples collected at three sites in Bulgaria during 2017-2018. Saharan dust intrusions were identified through a combination of satellite retrieved aerosol data and results from dust forecasting models and from backward trajectory model. The chemical composition of the samples (acidity pH, conductivity EC, main ions and elements) is analysed in view of the direction of the approaching air masses – “direct” influence (south-west), and “indirect” influence from other directions and regions, already impacted by Saharan dust. All samples were characterised by elevated values of pH (max 7.4), EC (max 202 µS.cm-1) and Si, Ca, Fe, Mg concentrations. For cases with direct influence Si and Ca values were up to 1.5 and 25 mg.l-1. In most of the indirect cases increased concentrations of sulphate, nitrate and ammonium were observed (up to 39.5, 23.1 and 8.3 mg.l-1)

• Details
• Contents