Effect of temperature and precipitation on linear increment of Sphagnum fuscum and S. magellanicum in Western Siberia

2017 ◽  
Vol 48 (3) ◽  
pp. 203-211 ◽  
Author(s):  
N. P. Kosykh ◽  
N. G. Koronatova ◽  
G. Granath
Keyword(s):  
Western Siberia ◽  
Effect Of Temperature ◽  
Temperature And Precipitation ◽  
Sphagnum Fuscum ◽  
Linear Increment

scholarly journals Use of Bomb-Produced 14C to Evaluate the Amount of CO2 Emanating from Two Peat Bogs in Finland

Radiocarbon ◽  
1995 ◽  
Vol 37 (2) ◽  
pp. 567-573 ◽  
Author(s):  
Högne Jungner ◽  
Eloni Sonninen ◽  
Göran Possnert ◽  
Kimmo Tolonen
Keyword(s):  
Emission Rate ◽  
Climatic Factors ◽  
Peat Bogs ◽  
Peat Bog ◽  
Annual Variations ◽  
Temperature And Precipitation ◽  
Activity Peak ◽  
Sphagnum Fuscum ◽  
Ams Dating ◽  
Eastern Finland

We used moss increment counting to obtain well-defined samples of the topmost peat layers of two Sphagnum fuscum hummocks. The two ombrotrophic bogs, Lakkasuo in central Finland and Korvinsuo in eastern Finland, are of different ages, covering 3 and 9 ka, respectively. Using AMS dating, we traced bomb-produced 14C through the topmost parts of the two peat profiles. A well-defined 14C activity peak was found in both sequences dating the corresponding layer to ad 1965. A comparison between the maximum peat activities and the corresponding atmospheric values for the period of interest provides an opportunity to evaluate the amount of CO2 emanating from the decaying peat bog, and taken up by the living sphagnum plants.Considerable variations in δ13C values were also observed. These variations indicate, at least partly, annual variations in the emission rate of CO2 from decomposition of older peat in the bog, and are connected with climatic factors such as temperature and precipitation.

scholarly journals INVESTIGATION OF ANTIOXIDANT ACTIVITY OF PEAT LIPIDS AND SAPROPELS FROM WESTERN SIBERIA

2017 ◽  
pp. 181-186
Author(s):  
Наталия (Natalija) Витальевна (Vital'evna) Сизова (Sizova) ◽  
Евгения (Evgenija) Борисовна (Borisovna) Стрельникова (Strel’nikova) ◽  
Ирина (Irina) Владимировна (Vladimirovna) Русских (Russkikh)
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Antioxidant Activity ◽  
Oxidation Reaction ◽  
Western Siberia ◽  
Model Reaction ◽  
Raw Material ◽  
Sphagnum Fuscum ◽  
Release Curve ◽  
Khanty Mansi Autonomous

The antioxidant activity of lipids extracted from peats and sapropels from Tomsk and Novosibirsk Regions and Khanty-Mansi Autonomous Okrug is estimated by microcalorimetry. The presence of antioxidants (AO) in the lipids of all peats under study and in a sapropel from the Dolgoye Lake is confirmed by the presence of an induction period (950–14000 s) on the heat release curve and the decrease in the final rate of the model reaction of the initiated cumene oxidation by 25–90%. The total amount of lipid antioxidants varying within the range (22–183)∙10-3 mol/kg is determined by the degree of inhibition of the oxidation reaction. The concentration of identified organic compounds (25–186 μg/g) including alkanes, fatty acids, steroids, terpenoids, and tocopherols is determined by chromatography-mass spectrometry, which correlates with the amount of AO in the peat. It is shown that the samples of initial peats are ordered by their antioxidant activity as follows: sphagnum fuscum > cotton grass > lowland wood > sphagnum phallax. Sphagnum fuscum peats are characterized by the maximum biological activity, which makes it possible to recommend them as an optimal raw material for practical use.

scholarly journals Effect of Temperature and Precipitation on the Daily New Cases and Daily New Death in Seven Cities around the Globe

2020 ◽  
Author(s):  
Amar Chaudhary ◽  
Adna Nelson K. ◽  
Harish S. ◽  
S. Mydhily ◽  
Chaitanya K.J. ◽  
...  
Keyword(s):  
Effect Of Temperature ◽  
Temperature And Precipitation

scholarly journals Long-term effect of temperature and precipitation on radial growth in a threatened thermo-Mediterranean tree population

Trees ◽  
2016 ◽  
Vol 31 (2) ◽  
pp. 491-501 ◽  
Author(s):  
Magdalena Żywiec ◽  
Elżbieta Muter ◽  
Tomasz Zielonka ◽  
Miguel Delibes ◽  
Gemma Calvo ◽  
...  
Keyword(s):  
Radial Growth ◽  
Term Effect ◽  
Effect Of Temperature ◽  
Temperature And Precipitation ◽  
Tree Population ◽  
Long Term Effect

scholarly journals 800-yr-long records of annual air temperature and precipitation over southern Siberia inferred from Teletskoye Lake sediments

2007 ◽  
Vol 67 (3) ◽  
pp. 400-410 ◽  
Author(s):  
Ivan Kalugin ◽  
Andrei Daryin ◽  
Lyubov Smolyaninova ◽  
Andrei Andreev ◽  
Bernhard Diekmann ◽  
...  
Keyword(s):  
Air Temperature ◽  
Western Siberia ◽  
Climatic Variability ◽  
Sediment Flux ◽  
Water Yield ◽  
Mean Annual Temperature ◽  
Southern Siberia ◽  
X Ray ◽  
Temperature And Precipitation ◽  
Ray Density

AbstractA unique 800-yr-long record of annual temperatures and precipitation over the south of western Siberia has been reconstructed from the bottom sediments of Teletskoye Lake, Altai Mountains using an X-ray fluorescence scanner (XRF) providing 0.1-mm resolution timeseries of elemental composition and X-ray density (XRD). Br content appears to be broadly correlative with mean annual temperature variations because of changes in catchment vegetation productivity. Sr/Rb ratio reflects the proportion of the unweathered terrestrial fraction. XRD appears to reflect water yield regime and sediment flux. Sedimentation is rather continuous because annual clastic supply and deposited mass are the same. The artificial neural networks method was applied to convert annual sedimentary time-series of XRD, Br content, and Sr/Rb ratio to annual records of temperature and precipitation using a transfer function. Comparison of these reconstructed Siberian records with the annual record of air temperature for the Northern Hemisphere shows similar trends in climatic variability over the past 800 yr. Estimated harmonic oscillations of temperature and precipitation values for both historical and reconstructed periods reveal subdecadal cyclicity.

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