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91.
Type Ib/c supernovae are shown to be concentrated to the inner edges of the spiral arms, with the distributions for type Ib and Ic supernovae being identical. We have found differences between the distributions of type II and Ib/c supernovae relative to spiral arms, suggesting that the type Ib/c presupernovae are, on average, younger. 相似文献
92.
Water Resources - The causes and features of storm surges formation in the Venetian Lagoon are discussed. The experience of sea level observations in Venice and the history of floods caused by... 相似文献
93.
94.
The basic features of the hydrological regime and morphodynamics of the mouth area of the Garonne and Dordogne rivers and its part, i.e., the Gironde Estuary, are discussed. The main attention is given to the analysis of water circulation and sediment dynamics in the Gironde Estuary under the joint impact of seasonal river flow and tidal fluctuations. In addition to this, the estuary evolution during the Holocene period and regularities of present-day erosional and accumulative processes are characterized. 相似文献
95.
Hydrological and morphological processes in the Zhujiang River (Pearl River) mouth area of China are discussed. The hydrological regime of the Xijiang River, which is the largest river of South China and the main source of water inflow into the Zhujiang mouth area, is described. The basic features of the hydrological regime of the delta and the near-shore zone of the Zhujiang River mouth are characterized, much attention being given to the role of tides and mixing of river and sea water in the hydrological regime. Special emphasis is placed on morphodynamic processes at the mouth area and the history of the Zhujiang Delta evolution. 相似文献
96.
Yu. M. Mikhailov G. A. Mikhailova O. V. Kapustina G. I. Druzhin S. E. Smirnov 《Geomagnetism and Aeronomy》2006,46(6):796-808
Simultaneous records of the diurnal variations in the quasistatic electric field in the near-Earth atmosphere, fluxes of discrete electromagnetic pulses in the VLF band, source azimuths, narrowband filter output emission intensity at frequencies of 4.65 and 5.3 kHz, and time forms and spectra of VLF pulses have been analyzed. The anomalous behavior of these parameters in October 2002 and August 2004 with different time delay was accompanied by earthquakes near the southeastern coast of Kamchatka at distances of 250–400 km from the registration points. Based on the results of a fine frequency-time analysis of the broadband records of VLF signals, it has been indicated for the first time that discrete electromagnetic pulses observed in anomalous fluxes before earthquakes were signals of local thunderstorm processes. 相似文献
97.
98.
General information on the Nile River basin is presented. Specific features of the morphological regime of the Nile Delta and its near-shore zone, as well as the delta water balance and groundwater regime are discussed. The dynamics of the sea coastline of the Nile Delta is described in great detail. It is shown that the recent delta of the Nile and its sea coastline have been formed under the joint impact of the eustatic sea level rise, subsidence of sediments in the northern part of the deltaic plain, and considerable decrease in the river sediment runoff after the construction of the Aswan High Dam. 相似文献
99.
A numerical multilevel model based on primitive equations of sea thermohydrodynamics is applied to investigate the development
of near-shore upwelling zones in the north-western Black Sea. Analysed are the results of eight numerical experiments on mapping
the areas of upwelling and downwelling, depending on wind direction. The acquired data are matched up with the observations
by the NOAA-11 satellite designed to measure sea surface radiation temperature twice a day. The numerical calculations are
shown to agree with the remotely-sensed data.
Translated by Vladimir A. Puchkin. 相似文献
100.
S. N. Bulgakov N. P. Bulgakov E. N. Mikhailova N. B. Shapiro 《Physical Oceanography》2005,15(1):27-36
In a series of numerical experiments, we simulate the process of generation of coastal upwelling induced by the winds of various directions in the central part of the Pacific Coast of Mexico (18–24°N, 103– 107°W). The numerical nonlinear multilevel model [see E. N. Mikhailova, I. M. Semenyuk, and N. B. Shapiro, “ Modeling of the variability of hydrophysical fields in the Tropical Atlantic,” Izv. Akad. Nauk SSSR, Fiz. Atmosf. Okean., 27, No. 10, 1139–1148 (1991)] is adapted to the region of investigations with 9-km space resolution by specifying the conditions of flow through the open lateral boundaries. The results of numerical experiments demonstrate that the NW, N, NE, and E winds are especially favorable for the generation of intense upwelling.__________Translated from Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 32–41, January–February, 2005. 相似文献