Eolian transport of salts - a case study in the area of Lake Ebinur (Xinjiang, Northwest China)статья
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Дата последнего поиска статьи во внешних источниках: 18 декабря 2013 г.
Аннотация:In the Ebinur region of Western Dzungaria, strong wind flows from Dzungarian Gate
predetermine the widespread development of deflation processes. As a result of humaninduced
desiccation of Lake Ebinur, a new source of the loose material—the dry
lakebed—has formed, which has intensified dust storms in this region. Annual dynamics
of the frequency and intensity of dust storms and the amount and chemical composition
of salts in the eolian material deposited in the area have been studied. The frequency of
dust storms and the intensity of dust and salt deposition regularly decrease with an
increase in the distance from the dry lake bottom (playa). The amount of dust deposition
ranges from 600 (near the lake) to 70 (100–200 km from the lake) g/m2/a. The amount of
salts precipitating with dust is mainly from 14 to 27 g/m2/a; the maximum registered
amount of salt deposition is 77 g/m2/a. As shown in our study, the farther from the lake,
the higher the portion of sulfate and calcium and the smaller the portion of chloride and
sodium ions in the composition of salts.