LITHIUM IN STONE METEORITES AND STONY IRONS     

S.V.S. Murty  P.N. Shukla  P.S. Goel 《Meteoritics & planetary science》1983,18(2):123-136

Lithium contents have been determined by neutron activation analysis in 54 meteorites distributed as: C (9), H (13), L (10), LL (3), E (2), achondrites (11), and stony irons (6). Among the undifferentiated meteorites Li contents range from 1 to 3 ppm. Li contents are higher in Ca-rich achondrites and mesosiderites than in Ca-poor achondrites and pallasites respectively. Among achondrites, Li correlates positively with Ca and Al and inversely with Mg. A minor Li-rich phase might be associated with the plagioclase component of achondrites. In several meteorites Li concentration is determined in magnetic and nonmagnetic fractions, chondrules, and light and dark components (for the gas-rich meteorites).  相似文献   

Variations in the atmospheric electric field and Meteorological parameters at a Tropical coastal urban station during 1936–40 and 1962–66     

A. Mary Selvam  R. Vijayakumar  A. S. R. Murty 《Theoretical and Applied Climatology》1993,48(1):15-22

Summary The seasonal and diurnal variations in the vertical component of the atmospheric electric field, air temperature, relative humidity and horizontal wind speed were studied using the surface data for the two periods (1936–40) and (1962–66) recorded at the tropical urban station, Colaba, Bombay (18°51N, 72°49E, 11 m ASL), located on the west coast of India.The atmospheric electric field during the latter period (1962–66) is significantly higher (up to 42.3%) than the earlier period (1936–40). This has been attributed to the enhanced particulate concentrations in the atmosphere. The increase noticed in the atmospheric electric field is a maximum during winter and minimum during the monsoon. The atmospheric electric field exhibited a marked semi-diurnal oscillation with peaks at 0900 LST and 2200 LST during winter, premonsoon and post-monsoon seasons of both the periods. During the monsoon season the double oscillation is not marked.The variations noticed in the surface air temperature and the relative humidity are in agreement with those observed in the atmospheric electric field. The horizontal wind speed showed a decrease which has been attributed to the surface roughness resulting from urbanization.With 7 Figures  相似文献   

On the infrared bands of A10 related to Mira phenomena     

Murty  P. S. 《Astrophysics and Space Science》1978,54(2):509-512

The calculated band positions and intensity factors for the bands of the infraredA-X transition of A10, suggest that an investigation for the infrared bands in the 1 to 5 m region of the spectra of Mira stars and M supergiants, along with the blue-green (B-X) bands, could provide clues to the Mira phenomena. The need for additional laboratory investigation of the infrared electronic transition is emphasized.  相似文献   

Growth rates of carbon dioxide emission in India     

Dr. L. S. Hingane  Dr. Bh. V. Ramana Murty 《Theoretical and Applied Climatology》1984,35(3):257-264

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A. Chandrasekhar: Basics pf atmospheric science
PHI Learning Private Limited, New Delhi-110001, India. Published in 2010, ISBN-978-81-203-4022-0, 446 p, 375 Indian Rupees     

Tad. S. Murty 《Natural Hazards》2011,56(1):403-405

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Impact of stratification on internal waves and differential wearing of thermal inversions on the east coast of India     

A. D. Rao  S. V. Babu  P. L. N. Murty  Smita Pandey 《Natural Hazards》2011,57(3):577-595

The surface layers of the Bay of Bengal along the east coast of India exhibit intricate stratification owing to the differential distribution of freshwaters. The winter (January–February) cooling of the salinity-induced stable layers results in the development of thermal inversions that deteriorate toward the end of the season. The study focuses on the behavior of the thermal inversions in the light of the variable stratification and the monsoon imposed reversing coastal current. To address the associated processes, a three-dimensional Princeton Ocean Model is applied for the east coast of India, and numerical experiments carried out to study the means by which the thermal inversions tend to perish with the passage of winter. The model domain with variable curvilinear grid uses input fields that comprise realistic bathymetry and initial temperature/salinity conforming to winter/specified stratification. The surface forcing comprises wind stress and diurnal pattern air–sea heat fluxes. The body forcing is derived from the periodic tidal elevations at the open boundaries. It has been found that the thermal inversions tend to sustain as the equator-ward flowing East India Coastal Current (EICC) traps the cool low saline waters between Paradip and Kakinada. The current off Paradip is weak and variable and is not a part of EICC. Consequently, in the absence of replenishment of cool and freshsurface waters, the temperature/salinity gradients get eroded steadily. No thermal inversions are noticed south of Kakinada because of relatively weak current with diminished vertical salinity gradient. As the nature of stratification encountered in the bay is highly variable due to diverse reasons, the behavior of internal waves under different stratification scenarios is also addressed. Numerical experiments indicate that the energy/amplitude of the internal waves are comparable in the surface layers for any stratification, where as it is certain orders exalted in the deeper waters of the strong stratification scenario. Further, it is found that the energies and pattern of the temperature oscillations conform to the nature of mixed tide at the corresponding latitude. The underneath stratification is found to be more responsible for the generation of internal waves compared to the local stratification. This implies that the body forcing emanating from below is the cardinal contributor for the generation of internal waves. The numerical experiment with a flat and uniform bottom showing weak manifestation of internal waves endorses the same. This connotes that the continental slopes are an effective generator of the internal waves and the energy flux conversion of the barotropic tide to internal waves seems to be heavily dependent on the shoaling bottom.  相似文献   

A Review of “Submarine Mass Movements and their Consequences”     

Tad Murty 《Marine Geodesy》2013,36(2-3)

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Deep water signature of a tsunami     

T. S. Murty 《Marine Geodesy》2013,36(1):73-102

The dynamics of tsunamis can be divided, for convenience, into three parts: tsunami generation, tsunami propagation, and the coastal problems. Out of these three, the problem of tsunami propagation is probably better understood than the other two. One of the main hindrances to the quantitative prediction of tsunami amplitudes at various coastal locations is a lack of detailed knowledge about the deep water signature of a tsunami. Here, the present understanding of this problem is discussed.  相似文献   

Guest Editorial     

T. S. Murty 《Marine Geodesy》2013,36(3):147-148

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A Review of: “Place Matters:”     

Tad Murty 《Marine Geodesy》2013,36(1):85-87

Oceanography, Units 1–16 edited by J. Stewart (Open University Press, 1977), 755 pp.

The Thermohaline Fine Structure of the Ocean by K. N. Fedorov (New York: Pergamon Press, Pergamon Marine Series. Volume 2, 1978). Translated from Russian by D. A. Brown, Technical Editor: J. S. Turner, 170 pp., no price listed.

The Ocean Basins and Margins edited by Alan E. M. Nairn and Francis G. Stehli, with William H. Kanes (New York: Plenum Press, Vol. 1–4A, 4B, 1973, 1979, 1975, 1977, and 1978) approx. 3,000 pp.

Recent Crustal Movements, 1977 edited by C.A. Whitten, R. Green, and B.K. Meade (New York: Elsevier Scientific Publishing Co., 1979), 663 pp., hardcover, $78.00.

The Alaskan Shelf‐Hydrographic, Sedimentary, and Geotechnical Environment by Ghanshyam Datt Sharma (New York: Springer Verlag, 1979), 498 pp., hardcover, $29.80.  相似文献