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The fact that the geomagnetic potential, as well as magnetic induction and its gradient, can be represented with an arbitrary accuracy in the scope of multipole models has been justified programmatically and analytically. The obtained expressions are brief and can be utilized in analytical and computer-based studies using methods of computer algebra and numerical computations. Previously unknown analytical expressions for the components of the first seven multipole tensors, expressed in terms of the Gaussian coefficients, have been obtained for applied problems of space dynamics. An algorithm that makes it possible to construct analytical expressions for the arbitrary-order multipole tensor and magnetic induction vector components in any finite approximation has been developed. 相似文献
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In the summer seasons of 2004–2007, the intensive runoff (cascading) of the Antarctic shelf water (ASW) down the shelf and
continental slope was revealed thanks to the recording of numerous thermohaline profiles across the shelf and continental
slope of the Commonwealth Sea and Prydz Bay. The quickly executed profiles (4–10 h) with submesoscale resolution (near the
shelf’s edge, the scale was even eddy-determinative, i.e., within 1.9–5.6 km), in combination with the fine-structure sounding
and fine vertical resolution of the near-bottom boundary layer, provided a qualitatively new level of understanding the natural
data. The detailed analysis of the temperature, salinity, and density patterns revealed the regularities and peculiarities
of the ASW shelf and slope cascading. The intensive ASW cascading near the shelf break and lower part of the slope can be
forced (appearing as discrete frontal meanders) or free (appearing as discrete plumes) and often has a wave-eddy character.
The field observational data confirmed the obtained representative estimates of the elements of the ASW slope cascading. The
basic area of the ASW formation is near the Amery Shelf Ice, from where the ASW spreads to the northwest, goes around the
Fram Bank, and flows down the continental slope. The evaluative contribution of the ASW slope cascading to the ventilation
of the deep and slope water of the Southern Ocean (near the shelf break 70 km long where the ASW cascading was observed) is
Q
K
= 0.04–0.24 Sv, which agrees well with the analogous estimates obtained in other regions of the Antarctic. 相似文献
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The resolution of the issues related to the prevention of ecological problems having a technogenic as well as a natural character relies on a knowledge of the formation patterns of hydrological processes, which makes it possible to rationally manage water resources, ecologically transform landscapes, and minimize the consequences of socio-economic development of the territory. The theoretical foundations of landscape-hydrological analysis, combined with the principles of instrumental landscape planning, determine the system of basin management, and some methods for tackling the water-ecological problems. 相似文献
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A.N. Antipov Yu.M. Semenov N.K. Elizbarashvili O.Ya. Sayadian R.M. Mamedov 《Geography and Natural Resources》2009,30(3):286-293
We have developed the planning documents for model territories of a different dimension: the landscape program of Adzharia (Georgia), the landscape structure plan for the Lake Sevan watershed basin (Armenia), and the landscape plan for the Shirvan National Park (Azerbaijan). Variants of the solution of regional natural-ecological problems are proposed, and the measures for implementation of the target concepts are substantiated. 相似文献
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P.?N.?GolovinEmail author N.?N.?Antipov A.?V.?Klepikov 《Russian Meteorology and Hydrology》2018,43(12):852-861
The developed approach to the calculation and construction of adequate local and common fields of potential density for the whole continental slope (to 2000 m) allows the representative detailed analysis of the downflow of cold and dense shelfwaters in all parts ofthe slope (cascading) in the Commonwealth Sea including the poorly explored deep part. Most often the slope cascading is manifested in the form of discrete meanders (in the steep part of the slope) or discrete plumes (both in the steep and deep parts). More rarely, it occurs in the form of intrusions and eddies (lenses). The pattern and stability of cascading depend on the slope steepness. The detected local irregularities of bottom topography also affect the cascading: they lead to the instability of density flows, intrusive layering, and eddy formation. 相似文献
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A. G. Gainanov D. A. Gilod A. A. Antipov A. A. Bulychev K. V. Krivosheya 《Oceanology》2006,46(4):526-533
Studies of the deep structure of the earth’s crust, lithosphere, and asthenosphere (tectonosphere) of transition zones from continents to oceans is one of the urgent issues of present-day geology and geophysics. The most important information on the deep structure of such zones is provided by seismic and seismological methods. Meanwhile, a comparison between gravity data and results of seismic studies showed that the gravity anomalies observed in the marginal seas of the Pacific Ocean cannot be explained solely by changes in the thickness and composition of the earth’s crust. In order to estimate the internal structure of the Pacific type of transition zones, the authors performed an analysis of the anomalous gravity field and the field of geoid heights in the Indonesian region, which also included calculations of the values of the gravity field and geoid heights in different reductions (Bouguer, Glenny, and isostatic), their transformations, and compilation of density models of the tectonosphere of the transition zone of this region compatible with the geological and geophysical data available. As a result of these studies, we performed zonation of the Indonesian region with respect to the gravity field and defined particular features of the areas distinguished. Based on the analysis performed, we inferred the existence of differences in the structure of individual zones both in the upper layers of the tectonosphere and in deeper layers. Detailed characteristics of the anomalous gravity fields typical of the objects distinguished are presented. 相似文献
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S. V. Popov M. P. Antipov A. S. Zastrozhnov E. E. Kurina T. N. Pinchuk 《Stratigraphy and Geological Correlation》2010,18(2):200-224
Sea-level fluctuations in the terminal Eocene, Oligocene, and Neogene of the Eastern Paratethys are quantitatively assessed
on the basis of facies and old coastlines traced on the northern platform shelf, levels of river valley incisions, and the
study of seismic profiles. The first data massif allows the characterization and correlation of transgression stages in the
history of the Eastern Paratethys. The greatest transgressions fall within the first half of the Late Eocene, mid-Early Oligocene,
initial Late Oligocene, initial Early Miocene, the initial Tchokrakian, Karaganian and Sarmatian in the Middle Miocene, the
middle and late Sarmatian and early Pontian in the Late Miocene, and the Akchagylian in the Caspian basin of the Pliocene.
In contrast, the greatest incisions of northern rivers running from the platform allow us to establish the time and extent
of the main declines in the base levels of the erosion. Maximal incisions date back to the terminal Eocene-initial Oligocene,
terminal Solenovian time in the terminal Rupelian, the terminal Maikop in the Early Miocene, the terminal Sarmatian and middle
Pontian in the Late Miocene, and the Early Pliocene in the Caspian basin. Large regressions also formed unconformity surfaces,
traced on seismic profiles as erosion boundaries of several orders. The surfaces are confined to the Eocene/Oligocene boundary,
middle and late Maikop, Sarmatian/Meotian boundary, middle Pontian, and terminal Miocene-initial Pliocene, as well as being
traced even in the most deep-water basins. The synthesis of these data suggests a preliminary version for the curve of transgression-regression
cyclicity. Its correlation with the eustatic curve shows their similarity only in the lower part-prior to the initial Middle
Miocene, when Paratethys became a semi-closed basin. 相似文献
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V. M. Lipunov V. G. Kornilov A. V. Krylov N. V. Tyurina A. A. Belinskii E. S. Gorbovskoi D. A. Kuvshinov P. A. Gritsyk G. A. Antipov G. V. Borisov A. V. Sankovich V. V. Vladimirov V. I. Vybornov A. S. Kuznetsov 《Astronomy Reports》2007,51(12):1004-1025
We present the results of observations obtained using the MASTER robotic telescope in 2005–2006, including the earliest observations of the optical emission of the gamma-ray bursts GRB 050824 and GRB 060926. Together with later observations, these data yield the brightness-variation law t ?0.55±0.05 for GRB 050824. An optical flare was detected in GRB 060926—a brightness enhancement that repeated the behavior observed in the X-ray variations. The spectrum of GRB 060926 is found to be F E ～ E ?β , where β = 1.0 ± 0.2. Limits on the optical brightnesses of 26 gamma-ray bursts have been derived, 9 of these for the first time. Data for more than 90% of the accessible sky down to 19 m were taken and reduced in real time during the survey. A database has been composed based on these data. Limits have been placed on the rate of optical flares that are not associated with detected gamma-ray bursts, and on the opening angle for the beams of gamma-ray bursts. Three new supernovae have been discovered: SN 2005bv (type Ia)—the first to be discovered on Russian territory, SN 2005ee—one of the most powerful type II supernovae known, and SN 2006ak (type Ia). We have obtained an image of SN 2006X during the growth stage and a light curve that fully describes the brightness maximum and exponential decay. A new method for searching for optical transients of gamma-ray bursts detected using triangulation from various spacecraft is proposed and tested. 相似文献