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| Titel |
Snow density climatology across the former USSR |
| VerfasserIn |
X. Zhong, T. Zhang, K. Wang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 8, no. 2 ; Nr. 8, no. 2 (2014-04-30), S.785-799 |
| Datensatznummer |
250116100
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| Publikation (Nr.) |
 copernicus.org/tc-8-785-2014.pdf |
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| Zusammenfassung |
| Snow density is one of the basic properties used to describe snow cover
characteristics, and it is a key factor for linking snow depth and snow
water equivalent, which are critical for water resources assessment and
modeling inputs. In this study, we used long-term data from ground-based
measurements to investigate snow density (bulk density) climatology and its
spatiotemporal variations across the former Soviet Union (USSR) from 1966 to
2008. The results showed that the long-term monthly mean snow density was
approximately 0.22 ± 0.05 g cm−3 over the study area. The maximum
and minimum monthly mean snow density was about 0.33 g cm−3 in June,
and 0.14 g cm−3 in October, respectively. Maritime and ephemeral snow
had the highest monthly mean snow density, while taiga snow had the lowest.
The higher values of monthly snow density were mainly located in the
European regions of the former USSR, on the coast of Arctic Russia, and
the Kamchatka Peninsula, while the lower snow density occurred in central
Siberia. Significant increasing trends of snow density from September
through June of the next year were observed, however, the rate of the
increase varied with different snow classes. The long-term (1966–2008)
monthly and annual mean snow densities had significant decreasing trends,
especially during the autumn months. Spatially, significant positive trends
in monthly mean snow density lay in the southwestern areas of the former
USSR in November and December and gradually expanded in Russia from February
through April. Significant negative trends mainly lay in the European Russia
and the southern Russia. There was a high correlation of snow density with
elevation for tundra snow and snow density was highly correlated with
latitude for prairie snow. |
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