A steady state model of the Somali current     

P. K. Das  S. K. Dube  G. S. Rao 《Journal of Earth System Science》1987,96(3):279-290

A steady state model of the Somali current including forcing by both the curl and the divergence of the wind stress is discussed. The model equations are linear, but the results presented are for the one nonlinear case. The grid resolution was 12 km in the zonal and 24 km in the meridional direction. The streamfunction and velocity potential of the current are presented for forcing by divergence and compared with a situation when only the curl is present. The results indicate that a two-gyre system appears in July, a representative month for the summer monsoon, only when divergence is included. Computations with available data indicate that the divergence is comparable in magnitude to the curl near the location of the Somali current. The model produces three other important features: (i) strong upwelling off the east coast of Africa, (ii) downwelling over central Arabian sea and (iii) a strong eastward current in the upper layer towards the interior of the Arabian sea near 12°N.  相似文献   

Seasonal and diurnal variability of thermal structure in the coastal waters off Visakhapatnam     

B. Prabhakara Rao  V. Ramesh Babu  P. Chandramohan 《Journal of Earth System Science》1987,96(1):69-79

Seasonal and diurnal variability of thermal structure in the coastal waters off Visakhapatnam has been examined in relation to the flow field and surface winds utilizing the hourly data of temperature and currents taken at a fixed location over a tidal cycle at monthly intervals. The coastal currents in the pre-monsoon period and strong near-surface winter cooling processes affect the thermal structure of the coastal sea. Upwelling which is predominant during March to May with an intermittent relaxing event helps in the development of a strong layered thermal structure while convective mixing due to winter inversions during November to February causes weak thermal gradients in the water column.  相似文献   

A Fourier transform method for the interpretation of self-potential anomalies due to two-dimensional inclined sheets of finite depth extent     

D. Atchuta Rao  H. V. Ram Babu  G. D. J. Sivakumar Sinha 《Pure and Applied Geophysics》1982,120(2):365-374

The self-potential anomaly due to a two-dimensional inclined sheets of finite depth extent has been analysed in the frequency domain using the Fourier transform. Expression for the Fourier amplitude and phase spectra are derived. The Fourier amplitude and phase spectra are analysed so as to evaluate the parameters of the sheet. Application of this method on two anomalies (synthetic and field data) has given good results.  相似文献   

Application of photo-interpretation and remote sensing techniques for integrated survey of Anantapur district,Andhra Pradesh     

P. Prabhakara Rao  K. C. C. Raju  M. Kareemuddin 《Journal of the Indian Society of Remote Sensing》1982,10(2):45-53

Multi-disciplinary integrated studies were carried out in the drought prone, backward district of Anantapur, for an appraisal of its natural resource and environmental potential, by applying the photointerpretation and remote sensing techniques. Shortage of land and water resources are identified as the major constraints for developmental planning. The natural resources and the potential available for development are documented in various thematic maps. The landuse pattern for agriculture and forestry is mainly controlled by the lithological and morphological units. It is surmised, that with the new source for groend water identified along linement and fracture zones, there is scope for augmenting and uplift the land use and crop-pattern, and this helps to upgrade the socio-economic condition of the district.  相似文献   

On some climatological aspects of the zonally averaged atmosphere in the southern hemisphere     

V. Brahmananda Rao  J. P. Bonatti 《Theoretical and Applied Climatology》1982,30(1-2):87-94

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Geophysical surveys in Parvati valley geothermal field, Kullu, India     

S.B. Rakesh Kumar  Singh  Mohan  L. Gupta  G.V. Rao 《Journal of Volcanology and Geothermal Research》1982,13(3-4)

Direct current resistivity surveys and shallow temperature measurements were carried out for geothermal exploration in a part of Parvati valley, goethermal field, Himachal Pradesh, India. At a few places, the Schlumberger soundings pointed to the presence of a relatively low-resistivity shallow layer, which probably represents fractured and jointed quartzite, saturated with hot/cold water. Wenner resistivity profiles indicate the presence of some possible shallow subsurface lateral hot water channels across the valley at Manikaran. Shallow temperature measurements show a good subsurface thermal anomaly near the confluence of the rivers Brahmaganga and Parvati. The results of the survey, together with other available geodata, suggest that an anomalous heat source does not lie beneath the study area.It is postulated that the meteoric water, originating at high elevations after heating as a result of circulation at depth, emerges at the surface in the Parvati valley as hot springs, after mixing in various proportions with near surface cold waters.  相似文献   

A method for rapid evaluation of magnetic anomalies over thin sheets     

H. V. Ram Babu  D. Atchuta Rao 《Pure and Applied Geophysics》1983,121(2):327-337

A method for rapid evaluation of magnetic anomalies over thin sheets is presented. This method is based on characteristic distancesX _3/4,X _1/2,X _1/4 at which the anomaly falls off to 3/4, 1/2, and 1/4 of the total (peak to peak) amplitude, respectively. Simple mathematical relations using these characteristic distances are presented to estimate the death and dip of the sheet. This method is fast and does not require prior knowledge of the base level and the origin. A few field examples are included to show the applicability and efficacy of the method.  相似文献   

Use of remote sensing techniques for agricultural land use survey,classification and planning     

B. M. Singh  M. L. Manchanda  H. S. Iyer  L. M. Pande  Jitendra Prasad  B. R. M. Rao 《Journal of the Indian Society of Remote Sensing》1983,11(3):1-13

A critical appraisal of the need and use of remote sensing techniques for land use mapping with particular reference to Indian conditions have been made. Land use classification system based on physiography, utility, management and identification have been suggested using remote sensing techniques at different levels of mapping.  相似文献   

Characteristics of Pi2 pulsations at an equatorial station and its occurrence association with the phase of the Moon     

Neeta H. Majmudar  D. R. K. Rao 《Journal of Earth System Science》1983,92(3):217-222

Diurnal variations of occurrence hours and the period of Pi2 pulsations at Choutuppal (India) for nearly half a solar cycle are presented. Maximum occurrence is noticed to be around local midnight in all the seasons. Shorter periods are observed in the late afternoon hours in E-and J-seasons. Lunar influence on the occurrence of Pi2 pulsations at this station is inferred with the occurrence due to this influence peaking in the vicinity of the lunar phase4.  相似文献   

List of Forthcoming Papers     

D.R.K. Reddy  N. Venkateswara Rao 《Astrophysics and Space Science》2001,276(1):349-349

Other Index

List of Forthcoming Papers  相似文献