INTAS 03515296 Studies at the IG RAS

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INTAS 03-51-5296Studies at the IG RAS

• Data base treatment
• Testing of the local model SPONSOR with a new
  procedure of snow heat conductivity
• Development of new snow cover local model /
  parameterization scheme
• Testing of the scheme during participation in
  SnowMIP-2
• Economy-related estimates of snow cover effects
  in different regions of Russia
• Regional studies of interannual variations of
  snow cover depth, density and other features
• Statistical studies of snow and air temperature
  influence on interannual variations of permafrost
  characteristics, and on variations of river
  runoff in Volga, Ob, Yenisey and Lena basins.

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• Papers prepared (to be prepared) at the IG RAS
  within our INTAS project
• Interannual Variability of Winter Snow
  Accumulation and Runoff in Four River Basins of
  Northern Eurasia (Bratislava extended abstract)
• Permafrost snow / air temperature relations (to
  be prepared)
• Large-scale snow accumulation in Eurasia in
  relation to atmospheric circulation (submitted to
  International Journal of Climatology)
• Local model testing (Bratislava extended
  abstract)
• New version of local model development (?)
• Economy-related snow influence (to be prepared).

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Data base treatment All main data sets were
finished and organized. Some new (and
voluminous!) data sets were obtained (such as
meteorology for ex-USSR at about 2100 stations,
plus some worldwide data sets). Unique data from
polar snow sites (Franz-Josef Land, Novaya
Zemlya, Polar Urals) obtained during the
International Geophysical Year (1957-59) are
being digitized and translated to English. New
data are welcome.
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Testing of SPONSOR model against Uzbekistan data
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Soil surface temperature (C) at Dukant in 1990
observed, calculated with Sturm snow conductivity
and effective heat conductivity of snow cover
with difference in effective heat conductivities
of individual snow layers accounted for
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Snow water equivalent (mm) at Kyzylcha in 1988
observed, calculated with Sturm snow conductivity
and effective heat conductivity of snow cover
with difference in effective heat conductivities
of individual snow layers accounted for
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Development of the new model of snow cover -
each snow layer appears after a snowfall - snow
physical properties are specified for fresh snow
at the given temperature, then they change
according to densening, crystal transformations,
depth hoar formation/destruction, melting, rain
falling on the top, etc. - snow layers are
united once their properties are close enough.
SnowMIP-2 experiments with heat/water balance
models, tested at 5 sites located in Canada,
Colorado, Japan, Finland and Switzerland, 1-2
winter seasons at each of the sites. They provide
starting conditions, local landscape parameters
and meteorological variables with 20-30 min time
steps.
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Scheme of new snow cover model

• The snow cover model considering its vertical
  structure and metamorphism
• N1, N2 . calculation layers of the snow cover
  model
• h1,h2 . real layers of the snow cover model

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Annual mean air temperature anomalies (ºC) from
1961-90, averaged over Russia. Horizontal lines
indicate means with 99 confidence levels.
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Change of the snow depth (cm) in Eurasia in
1989-2001 as compared to 1951-80
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Change of snow depth (cm) and snow volume to be
removed from the roads (cubic km) in the
administrative units of Russia North-western
region Pskov oblast
-6.57 -0.076 St.Petersburg oblast
-5.32 -0.071 Tver oblast
-3.68
-0.060 Central region Moscow oblast
-0.59 -0.012 Samara oblast
9.28 0.097
(stable industry) Tatar republic
12.71 0.231 (oil production,
machinery) Urals and Siberia Tyumen oblast
16.33 0.334 (oil
and gas production) Bashkir republic
10.70 0.327 (oil
production) Taimyr autonomous region 12.74
0.004 (poorly developed territory)
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Study of relation of permafrost temperature
variations to climatic factors
Interannual variations of frozen soil temperature
at 3m and 10m, averaged for 10 experimental sites
Interannual variations of seasonal surface air
temperature
Interannual variations of December-March snow
depth
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Summary of Stepwise RegressionFrozen soil
temperature at 3m (averaged for 10 sites) -
climate parameters Statistically significant
values (at 5) are shown in bold.