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Altitudinal and Seasonal Assessment of Precipitation Chemistry and Wet Deposition in the Vaz Research Forest, Northern Iran

Year: 2025

Type: preprint

Abstract: This study examines the chemical composition of precipitation across altitudinal gradients in the Vaz Research Forest, northern Iran, from 1999 to 2003. Precipitation samples were collected at 300, 1000, 1600, and 2200 m above sea level. Concentrations of nitrate (NO₃⁻), sulfate (SO₄²⁻), chloride (Cl⁻), ammonium (NH₄⁺), calcium (Ca²⁺), and magnesium (Mg²⁺) and their wet deposition values were analyzed. Results indicate that annual wet deposition of most ions decreases with elevation, although anomalies at 1000 m suggest anthropogenic emissions. Precipitation remained slightly alkaline (pH > 7), while nitrogen deposition exceeded critical thresholds for sensitive ecosystems (Pardo et al., 2011; UNECE, 2022). These findings highlight the influence of local human activities on atmospheric chemistry.

DOI: 10.31223/x52t7z

Authors: Ali Salahi, Shirin Geranfar, Karam-Ali Zabihi, Shahram Banej-shafii, Vahid-Reza Moniri, Ebrahim Azizkhani, Sattar Zeinali

Institutions: Research Institute of Forests and Rangelands, Gorgan University of Agricultural Sciences and Natural Resources

Language: English

Topic: Atmospheric chemistry and aerosols

Subfield: Atmospheric Science

Field: Earth and Planetary Sciences

Domain: Physical Sciences

SDGs: Clean water and sanitation, Life on land, Climate action

Open Access status: gold

OpenAlex ID: W4413377732

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