Seasonal features of aerosol particles recorded in snow from Mt. Qomolangma(Everest) and their environmental implications
CONG Zhiyuan , KANG Shichang , QIN Dahe
DOI:
Received August 29, 2008,Revised November 14, 2008, Accepted , Available online
Volume 21,2009,Pages 914-919
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To assess the seasonality of aerosol deposition and anthropogenic e ects on central Himalayas, a 1.85-m deep snow pit was dug on
the northern slope of Mt. Qomolangma (Everest). Based on the morphology and energy dispersive X-ray (EDX) signal, totally 1500
particles were classed into 7 groups: soot; aluminosilicates; fly ash; calcium sulfates; Ca/Mg carbonates; metal oxides; and biological
particles and carbon fragments. The size distribution and number fractions of di erent particle groups exhibited distinct seasonal
variations between non-monsoon and monsoon periods, which are clearly related to the di erences in air mass pathways. Specifically,
the relative abundance of soot in non-monsoon period (25%) was much higher than that in monsoon period (14%), indicating Mt.
Qomolangma region received more anthropogenic influence in non-monsoon than monsoon period.
