排序方式： 共有15条查询结果，搜索用时 31 毫秒
1.
2.
Environmental and sanitary estimation of small-river water quality is made in the zone of influence of gold-mining facilities in Krasnoyarsk Region. The estimates are based on data on the hydrochemical regime and the characteristics of phytoplankton, microphyto-periphyton, macrozoobenthos, and ichthyofauna collected during the vegetation period of 2000. 相似文献
3.
4.
A response of radial increments in coniferous species to year-to-year fluctuations in soil temperature of the Baikal and Upper-Chara depressions is demonstrated. The study revealed a reliable correlation between soil temperature variations and variability in the increment index of coniferous species in March and July–August (exclusive of the droughty Priol’khonie). Soil temperature at a depth of 0.8 m was reconstructed from tree-ring chronologies. It is found that the largest contribution to the value of a positive trend of soil temperature is made by its intense rise during the last decade of the 20th century. 相似文献
5.
We examine some issues related to a classification of climates. A climatic regionalization has been carried out, and a brief characteristic given to the identified types of climate. It has been found that the relationship of the sums of mean daily ground air temperatures above 10 °C and the dryness index show a clearly pronounced zonal distribution. The combination of sums of mean daily air temperatures below ?10 °C and the depth of snow in the northern part of the plain is characterized by a horizontal distribution, and only in the middle and southern parts of the plain do these indices acquire zonal regularities. An analysis is made of the long-term dynamics of air temperature to reveal that some climate warming during 1981–2010 was mainly caused by a rise in winter air temperature. 相似文献
6.
Long-term data from meteorological stations have been used in assessing the thermal state of the soil layer in large depressions
of the Prebaikalia and Northern Transbaikalia. We examine the characteristics of temperature distribution in depth over an
annual cycle for seasonally frozen and permafrost soils. For the Baikalian type depressions we carried out a spatial differentiation
of the lowest and highest (having regard to the temperature lag) mean monthly soil temperatures. It is concluded that within
a single depression the thermal regime of the soil fluctuates over a very broad range. On the other hand, an identical situation
with the temperature regime can occur in different depressions. 相似文献
7.
8.
L. M. Psalomshchikova V. V. Stadnik I. A. Sall’ N. P. Mironicheva O. V. Trofimova G. A. Aleksandrova 《Russian Meteorology and Hydrology》2017,42(11):705-716
The calculated aeroclimatic characteristics of the lower 1000-m atmospheric layer needed to study the conditions for the atmospheric diffusion of pollutants are considered. The measurements of temperature profiles with the MTP-5 microwave temperature profiler and the data of weather balloon observations on wind speed and wind direction from the special meteorological station located at the Leningrad NPP-2 (LNPP-2) construction site are used as initial data. The characteristics of the vertical distribution of temperature and wind obtained from the observations in the LNPP-2 construction area and at the Voeikovo upper-air network station are compared. 相似文献
9.
Long-term temperature data on a soil layer 3.2 m in thickness have been used in the differentiation of a topographically highly complicated permafrost on the territory of Transbaikalia. It was found that the geographical ranges are most clearly identified from mean annual temperature values. The schematic map displays the areas with the temperatures –4 to–1°C,–1 to 1°C and 1 to 4°C which are in good agreement with the permafrost distribution pattern (continuous and discontinuous permafrost, and permafrost islands). A classification of the thermal conditions of soils is carried out according to the highest mean monthly temperature at all depths. We identified four types which are characterized by the qualitative assessment as warm, moderately warm, cold and very cold. A relevant cartographic model shows the distribution of the thermal regime of soils for a warm season. The dot method was used to provide a clear display of available information on soil temperature, and it was possible to show the existence of small areas of the types of thermal regime and their fragmentation. Current changes in soil temperature were determined for August, which are in good agreement with regional changes in ground air temperature. In either case, we observed positive linear trends. Assessments of thermal resources of the soil layer and their geographical patterns belonging to the widespread depression-valley and valley natural systems as well as to the relatively planate surfaces of Transbaikalia can be used for scientific and practical purposes. 相似文献
10.
Trofimova E. A. Zinchenko I. I. Zemlyanukha P. M. Thomasson M. 《Astronomy Reports》2020,64(3):244-258
Astronomy Reports - A survey of massive star forming regions in the lines of the lowest transitions of deuterated molecules DCN, DNC, DCO+, N2D+ in the 4 mm wavelength range was performed using the... 相似文献