scholarly journals Effects of wildfire on the water chemistry of the northeastern part of the Great Vasyugan Mire (Western Siberia)

2021 ◽  
Vol 928 (1) ◽  
pp. 012006
Author(s):  
Yu A Kharanzhevskaya ◽  
A A Sinyutkina
Keyword(s):  
Water Chemistry ◽  
Western Siberia ◽  
Plant Residues ◽  
Summer Drought ◽  
Snow Melting ◽  
Northeastern Part ◽  
Melting Period

Abstract In this study, we determined the effect of wildfire in 2016 on the water chemistry of the northeastern drained part of the Great Vasyugan Mire. The influence of the pyrogenic factor on the water chemistry of the Great Vasyugan Mire was marked by an increase in concentrations of Na+, K+, Ca2+, Mg2+, Fetotal, SO4 2–, HCO3 –, NO– 3, Zn, Cu, Pb, and Cd. The maximum concentrations were observed in the spring (April) during the snow melting period, as well as during the rewetting period after the summer drought. In 2018–2019, there was a decrease in the concentration of the components in the waters after the fire in 2016 (SO4 2–, HCO3 –, NO– 3, Pb, Cd, Zn). An increase in the content of Na+, K+, Ca2+, Mg2+, NH+ 4, and Cu was noted, which is associated with the intensification of the processes of mineralisation of plant residues in the upper burnt peat layers.

scholarly journals Biogeophysical impacts of peatland forestation on regional climate changes in Finland

2014 ◽  
Vol 11 (24) ◽  
pp. 7251-7267 ◽  
Author(s):  
Y. Gao ◽  
T. Markkanen ◽  
L. Backman ◽  
H. M. Henttonen ◽  
J.-P. Pietikäinen ◽  
...  
Keyword(s):  
Land Cover ◽  
Air Temperature ◽  
Surface Albedo ◽  
Climate Model ◽  
Regional Climate ◽  
Surface Air Temperature ◽  
Forest Growth ◽  
Background Information ◽  
Snow Melting ◽  
Melting Period

Abstract. Land cover changes can impact the climate by influencing the surface energy and water balance. Naturally treeless or sparsely treed peatlands were extensively drained to stimulate forest growth in Finland over the second half of 20th century. The aim of this study is to investigate the biogeophysical effects of peatland forestation on regional climate in Finland. Two sets of 18-year climate simulations were done with the regional climate model REMO by using land cover data based on pre-drainage (1920s) and post-drainage (2000s) Finnish national forest inventories. In the most intensive peatland forestation area, located in the middle west of Finland, the results show a warming in April of up to 0.43 K in monthly-averaged daily mean 2 m air temperature, whereas a slight cooling from May to October of less than 0.1 K in general is found. Consequently, snow clearance days over that area are advanced up to 5 days in the mean of 15 years. No clear signal is found for precipitation. Through analysing the simulated temperature and energy balance terms, as well as snow depth over five selected subregions, a positive feedback induced by peatland forestation is found between decreased surface albedo and increased surface air temperature in the snow-melting period. Our modelled results show good qualitative agreements with the observational data. In general, decreased surface albedo in the snow-melting period and increased evapotranspiration in the growing period are the most important biogeophysical aspects induced by peatland forestation that cause changes in climate. The results from this study can be further integrally analysed with biogeochemical effects of peatland forestation to provide background information for adapting future forest management to mitigate climate warming effects. Moreover, they provide insights about the impacts of projected forestation of tundra at high latitudes due to climate change.

Non-point pollution of Ishikari River, Hokkaido, Japan

2001 ◽  
Vol 44 (7) ◽  
pp. 1-8 ◽  
Author(s):  
H. Tachibana ◽  
K. Yamamoto ◽  
K. Yoshizawa ◽  
Y. Magara
Keyword(s):  
Suspended Matter ◽  
Chemical Components ◽  
Snow Melting ◽  
Organic Matters ◽  
Stable Period ◽  
Melting Period ◽  
One Year ◽  
Short Time ◽  
Point Pollution ◽  
Flooding Period

We researched the Ishikari river, Japan's second-longest river, to clarify the characteristics of non-point pollution by comparing flux characteristics of chemical components in three periods of one year: the snow melting period, the typhoon flooding period and the stable period. We found non-point pollutants present in great amounts because a large amount of suspended matter, which is contained in soil, flows into the river and concentrations of nutrients and organic matters do not decrease in a short time in the flooding period by rain and in the snow melting period.

Precursors and triggers of an alpine rockslide in Japan: the 2004 partial collapse during a snow-melting period

Landslides ◽  
2012 ◽  
Vol 10 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Ryoko Nishii ◽  
Norikazu Matsuoka ◽  
Hiromu Daimaru ◽  
Masatsugu Yasuda
Keyword(s):  
Snow Melting ◽  
Melting Period

scholarly journals Diurnal and seasonal dynamics of the electrical conductivity of water of the northeastern part of the Great Vasyugan Mire (Western Siberia)

2021 ◽  
Vol 928 (1) ◽  
pp. 012005
Author(s):  
Yu A Kharanzhevskaya
Keyword(s):  
Electrical Conductivity ◽  
Seasonal Dynamics ◽  
Western Siberia ◽  
Peat Deposit ◽  
Time Intervals ◽  
Biochemical Processes ◽  
Northeastern Part ◽  
The Third ◽  
A Value ◽  
Hydrometeorological Conditions

Abstract In this study, we determined the diurnal and seasonal dynamics of the electrical conductivity of waters of the northeastern part of the Great Vasyugan Mire in Western Siberia. Our studies showed that the electrical conductivity of the waters for the period of April to September 2016 was characterised by a value of 35 μS/cm, and the seasonal amplitude was 25 μS/cm. In seasonal dynamics, there are three maximums of electrical conductivity in waters. The first maximum was formed in April (48 μS/cm) and is associated with snowmelt water supply. The second one was observed in May after the complete thawing of the peat deposit (39 μS/cm), and the third was observed at the end of July as a result of biochemical processes in the peat deposit (43 μS/cm). Our studies have shown the electrical conductivity hysteresis during time intervals from 3–5 to 6–10 days electrical conductivity remains constant despite the change in hydrometeorological conditions (water table level, temperature).

scholarly journals Water quality of Ishikari river during the snow melting period.

1996 ◽  
Vol 9 (5) ◽  
pp. 444-456 ◽  
Author(s):  
Harukuni TACHIBANA ◽  
Tatsuo SHIMIZU ◽  
Yoshihisa NAKAGAWA
Keyword(s):  
Water Quality ◽  
Snow Melting ◽  
Melting Period

scholarly journals Biogeophysical impacts of peatland forestation on regional climate changes in Finland

2014 ◽  
Vol 11 (7) ◽  
pp. 11249-11291 ◽  
Author(s):  
Y. Gao ◽  
T. Markkanen ◽  
L. Backman ◽  
H. M. Henttonen ◽  
J.-P. Pietikäinen ◽  
...  
Keyword(s):  
Land Cover ◽  
Air Temperature ◽  
Climate Model ◽  
Regional Climate ◽  
Surface Air Temperature ◽  
Forest Growth ◽  
Snow Melting ◽  
Growing Period ◽  
Melting Period ◽  
Middle West

Abstract. Land cover changes can impact the climate by influencing the surface energy and water balance. Unproductive peatlands were extensively drained to stimulate forest growth in Finland over the second half of 20th century. The aim of this study is to investigate the biogeophysical effects of peatland forestation on climate change in Finland. Two sets of 18 year climate simulations were done with the regional climate model REMO by using land cover data based on pre-drainage (1920s) and post-drainage (2000s) Finnish National Forest Inventories. The results show that in the most intensive peatland forestation area located in the middle west of Finland, the differences in monthly averaged daily mean two-metre air temperature show a spring warming of up to 0.43 K in April, whereas a slight cooling of less than 0.1 K in general is found from May till October. Consequently, snow clearance days over that area are advanced up to 5 days in the mean of 15 years. No clear signal is found for precipitation. Through analysing the simulated temperature and energy balance terms, as well as snow depth over five selected subregions, a positive feedback induced by peatland forestation is found between decreased surface albedo and increased surface air temperature in the snow melting period. Our modelled results show good qualitative agreements with the observational data. In general, decreased albedo in snow-melting period and increased evapotranspiration in the growing period are the most important biogeophysical aspects induced by peatland forestation that cause changes in climate.

Relationships between Vegetation Succession, Pore Water Chemistry and CH4 and CO2 Production in a Transitional Mire of Western Siberia (Tyumen Oblast)

Wetlands ◽  
2016 ◽  
Vol 36 (5) ◽  
pp. 863-874 ◽  
Author(s):  
T.-M. Wertebach ◽  
K.-H. Knorr ◽  
M. Lordieck ◽  
N. Tretiakov ◽  
C. Blodau ◽  
...  
Keyword(s):  
Water Chemistry ◽  
Pore Water ◽  
Western Siberia ◽  
Vegetation Succession ◽  
Co2 Production ◽  
Tyumen Oblast ◽  
Pore Water Chemistry

Road Salt Influence on Pollutant Releases from Melting Urban Snow

2007 ◽  
Vol 42 (3) ◽  
pp. 153-161 ◽  
Author(s):  
Karin Reinosdotter ◽  
Maria Viklander
Keyword(s):  
Heavy Metals ◽  
Suspended Solids ◽  
Road Salt ◽  
Snow Melting ◽  
Total Chloride ◽  
Constant Rate ◽  
Melting Period ◽  
High Chloride ◽  
Melting Experiment ◽  
Chloride Concentrations

Abstract A snow-melting experiment was performed to study the effects of road salt on the melting of urban snow from a snow windrow (pile) along a road in central Luleå, Sweden. Two snow piles were formed in the laboratory, with and without road salt added, and melted under similar conditions. All meltwater was collected and analyzed. The purpose of the experiment was to study the influence of the use of de-icing salt on meltwater quality and the release of pollutants from urban snow. The study indicated that the use of road salt may increase the dissolved metal phase in the urban snow meltwater. Also, the salt seems to have the largest effect at the beginning of the melting period when chloride is leaving the snow pile. Of total chloride, 90% was transported with the first 20% of the meltwater. Concentrations of the particulate-bound metals showed a fairly constant rate of release at the start of melt, but increased rapidly towards the end of the melting period, and this was more pronounced in the case of snow containing high chloride concentrations. Overall, a larger transport of solids was found for the pile with salt due to faster melting. Significantly larger masses of suspended solids and two heavy metals (Cu and Zn) were released with the meltwater from the pile with salt in comparison with the no-salt pile. The rest of the suspended solids and heavy metals stayed in the solid residue remaining at the end of the experiment.

Sign in / Sign up

Export Citation Format

Share Document