A climate shift in seasonal values of meteorological and hydrological parameters for Northeastern Asia

The well-known climate shift that occurred around 1976/1977 in the marine ecosystem of North Pacific Ocean was preceded by changes in the early 1970s over Northeastern Asia. In this paper long-term variability of Siberian High and Aleutian Low parameters, seasonal discharge of Siberian rivers and air temperature and precipitation regime in their watersheds are examined in data sets covering 1945–1995. It was found that the change in seasonal values of Siberian river discharges is a consequence of an atmospheric climatic shift that occurred in the early 1970s over North Asia. This shift was induced by a change in atmospheric circulation pattern in the Eurasian sector and Pacific sector of the Northern Hemisphere after 1970. It resulted in changes in position and intensity of the Siberian High and Aleutian Low before and after the 1970s, which induced a different pattern of precipitation in West and East Siberia. There was an increase in winter precipitation over West Siberia but a decrease over East Siberia. The period after 1970s is characterized by higher amplitude of all parameters and increases in the year-to-year variability.     

Interaction of the Atmosphere and Lithosphere in the Minute Range of Periods

Doklady Earth Sciences - The interaction between the atmosphere and the lithosphere in the minute range of periods is considered. The technique of assessment of the influence of atmospheric...     

A lithofacies model of upper jurassic productive deposits in the eastern part of the Shirotnoye Priobie region (Western Siberia)

On the basis of an integrated interpretation of well data, core analysis, geophysical well logging, and seismic data a new geological model of the JV₁¹⁻² stratum is suggested for one of the Shirotnoye Priobie areas in Western Siberia. The results of acoustic inverse and the rock elastic property research were used for the validation of lithofacies zonation. Supplementary exploration of the area and production drilling are recommended.     

The contribution of organic matter to the alkaline reserve of natural waters

The contribution of organic matter (humic compounds) to the alkaline reserve of seawater in the Sea of Japan, in the Razdol’naya River estuarine waters, and in the interstitial waters of the sediments of the Sea of Okhotsk was characterized using two procedures for alkalinity measurements: the method by Bruevich and that of the sample equilibrium with air. It was found that the surface waters of the Sea of Japan contained about 20 μmol/kg of alkalinity of organic origin, and this value twofold decreased with depth. For most of the actual cases of the calculations of the seawater carbonate system, this value may be neglected. Meanwhile, the contribution of organic alkalinity to the Razdol’naya River waters amounts to nearly 120 μmol/kg. It was shown that, if this value in the calculation of the carbonate system of the Razdol’naya River estuary-Amur Bay is neglected, this may cause gross errors in the values of the partial pressure of carbon dioxide (the error might be over 1500 μatm) and in the dissolved inorganic carbon (an error over 150 μmol/kg). The maximum absolute contribution of the humic matter (over 300 μmol/kg) was found for the interstitial waters in selected sediments of the Sea of Okhotsk. In the interstitial waters of these sediments, humic matter concentrations as high as 300 mg/l were detected. The data obtained show that the determination of the amount of humic matter must be an indispensable condition for an adequate analysis of estuarine carbonate systems and of the interstitial water in reduced marine sediments.