A Study on the Influence of the Land Surface Processes on the Southwest Monsoon Simulations using a Regional Climate Model     

C. V. Srinivas  D. V. Bhaskar Rao  D. Hari Prasad  K. B. R. R. Hari Prasad  R. Baskaran  B. Venkatraman 《Pure and Applied Geophysics》2015,172(10):2791-2811

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Biosorption of Toxic Heavy Metals on Sawdust          下载免费PDF全文

Vishal Mishra  Srinivas Tadepalli 《洁净——土壤、空气、水》2015,43(3):360-367

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Effect of River Discharge on Bay of Bengal Circulation   总被引：1，自引：1，他引：1  

Srinivas Chamarthi  P. Shree Ram  Lalita Josyula 《Marine Geodesy》2013,36(3):160-168

The seasonal circulation and mixed layer depths in Bay of Bengal is modeled using the three-dimensional Princeton Ocean Model (POM). Along the coastal boundaries a higher resolution is accomplished using the curvilinear orthogonal grid. Model uses a free-surface and terrain following sigma coordinates. The initial climatological salinity and temperature fields for the model are derived from the World Ocean Atlas-2001(WOA01). The Model is forced with wind stress derived from COADS wind climatology. Bilinear interpolation is used to obtain the initial fields and wind stress to the required model specification. Using the seasonal fields and wind stress the model is integrated for simulating Bay of Bengal circulation. The numerical simulations on climatological scale for monsoon months were conducted to study the evolution of dynamics. The simulations bring out not only the typical characteristic features of fresh water plume along the coast but also intensification of the flow over the monsoon period. The increase in the fresh water flow found to affect only the western parts of the BoB. The opposing currents due to monsoon winds and southward flowing fresh water discharge (FWD) were also delineated. The model results show that the wind stress induced turbulence process is subdued in the presence of strong vertical salinity stratification due to the influence of FWD. The simulated mixed layer depths are in agreement with the reported analytical energy required for mixing values.  相似文献   

Bernstein preprocessing for nonlinear least squares inversion of gravity and magnetic data     

S. Srinivas  P. S. Moharir  V. M. Maru 《Journal of Earth System Science》1999,108(4):269-275

Nonlinear, nonlocal and adaptive optimization algorithms, now readily available, as applied to parameter estimation problems, require that the data to be inverted should not be very noisy. If they are so, the algorithm tends to fit them, rather than smoothening the noise component out. Here, use of Bernstein polynomials is proposed to prefilter noise out, before inversion with the help of a sophisticated optimization algorithm. Their properties are described. Inversion of gravity and magnetic data for basement depth estimation, singly and jointly, and without and after Bernstein-preprocessing is conducted to illustrate that the inversion of Bernstein-preprocessed gravity data alone may be slightly superior to the joint inversion of gravity and magnetic data.  相似文献   

Geocenter variations derived from GPS tracking of the GRACE satellites   总被引：2，自引：2，他引：0  

Zhigui Kang  Byron Tapley  Jianli Chen  John Ries  Srinivas Bettadpur 《Journal of Geodesy》2009,83(10):895-901

Two 4.5-year sets of daily geocenter variations have been derived from GPS-LEO (Low-Earth Orbiter) tracking of the GRACE (Gravity Recovery And Climate Experiment) satellites. The twin GRACE satellites, launched in March 2002, are each equipped with a BlackJack global positioning system (GPS) receiver for precise orbit determination and gravity recovery. Since launch, there have been significant improvements in the background force models used for satellite orbit determination, most notably the model for the geopotential, which has resulted in significant improvements to the orbit determination accuracy. The purpose of this paper is to investigate the potential for determining seasonal (annual and semiannual) geocenter variations using GPS-LEO tracking data from the GRACE twin satellites. Internal comparison between the GRACE-A and GRACE-B derived geocenter variations shows good agreement. In addition, the annual and semiannual variations of geocenter motions determined from this study have been compared with other space geodetic solutions and predictions from geophysical models. The comparisons show good agreement except for the phase of the z-translation component.  相似文献   

Hydroclimatic river discharge and seasonal trends assessment model using an advanced spatio-temporal model     

Srinivas  R.  Singh  Ajit Pratap  Dhadse  Kunal  Magner  Joe 《Stochastic Environmental Research and Risk Assessment (SERRA)》2020,34(2):381-396

Stochastic Environmental Research and Risk Assessment - Climatic changes have a significant impact on the hydrologic behavior of a river especially its discharge. Sustainable management of water...  相似文献   

Non-stationary and non-linear influence of ENSO and Indian Ocean Dipole on the variability of Indian monsoon rainfall and extreme rain events     

Jagdish Krishnaswamy  Srinivas Vaidyanathan  Balaji Rajagopalan  Mike Bonell  Mahesh Sankaran  R. S. Bhalla  Shrinivas Badiger 《Climate Dynamics》2015,45(1-2):175-184

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Surface radioactive anomalies at Srisailam sub basin,Cuddapah basin,India     

Bhoopathi  Vishnu  Niranjan Kumar  S.  Sastry  R. S. N.  Srinivas  B. 《中国地球化学学报》2015,34(2):265-271

Acta Geochimica - Surface radioactive survey has been carried with portable gamma ray spectrometer (PGRS) about the 45 km2 around the Srisailam sub basin, the surface radioactive anomalies...  相似文献   

Investigations related to scientific deep drilling to study reservoir-triggered earthquakes at Koyna,India   总被引：1，自引：0，他引：1  

Harsh Gupta  N. Purnachandra Rao  Sukanta Roy  Kusumita Arora  V. M. Tiwari  Prasanta K. Patro  H. V. S. Satyanarayana  D. Shashidhar  K. Mallika  Vyasulu V. Akkiraju  Deepjyoti Goswami  Digant Vyas  G. Ravi  K. N. S. S. S. Srinivas  M. Srihari  S. Mishra  C. P. Dubey  D. Ch. V. Raju  Ujjal Borah  K. Chinna Reddy  Narendra Babu  Sunil Rohilla  Upasana Dhar  Mrinal Sen  Y. J. Bhaskar Rao  B. K. Bansal  Shailesh Nayak 《International Journal of Earth Sciences》2015,104(6):1511-1522

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Site classification of Pondicherry using shear-wave velocity and horizontal-to-vertical spectral ratio     

S. Trupti  K. Goverdhan  K. N. S. S. S. Srinivas  P. Prabhakar Prasad  T. Seshunarayana 《Natural Hazards》2013,69(1):953-964

Site classification studies play a vital role in earthquake hazard assessment since in situ ground conditions substantially affect the characteristics of incoming seismic waves during earthquakes. Flat areas along the coast and rivers generally consist of thick layers of soft clay and sand. Such deposits amplify certain frequencies of ground motion, thereby attributing to an increase in the damage due to an earthquake. Hence, site classification studies have been carried out using shear-wave velocity, ground response, and corresponding amplification at 83 locations in Pondicherry, a coastal city in India. The present study is aimed at estimating the shear-wave velocity through multichannel analysis of surface waves and to compute the average shear-wave velocity (V _S ³⁰ ), stiffness, and N values using empirical relations. Further, site-response studies (horizontal-to-vertical spectral ratio) were conducted to estimate the ground-response frequencies and corresponding amplifications through Nakamura technique. From the results, the study area was classified into three types, i.e., C-class: with V _S ³⁰ in the range of 360–760 m/s, D-class: with V _S ³⁰ in the range of 180–360 m/s, and E-class: with V _S ³⁰  < 180 m/s following the National Earthquake Hazard Reduction Programme norms (BSSC in NEHRP recommended provisions for seismic regulations for new buildings and other structures (FEMA 450), part 1: provisions. Building Seismic Safety Council for the Federal Emergency Management Agency, Washington, 2003). Finally, a site classification map for Pondicherry region has been prepared, which can be used in urban planning and strengthening of existing structures against future earthquakes.  相似文献