Browsing by Author "Varkey, M.J."
Now showing items 1-20 of 42
-
Application of FFT methods to wind wave data series by adding zeros
Varkey, M.J. (National Institute of Oceanography, Goa, 1987)A method to add zeros (in FFT methods) to a short data sample (< 2m) to make the sample size equal to 2m is illustrated in this paper. It is found that the spectrum could be computed reliably without any undesirable side ... -
Characteristic mixing triangles in the Bay of Bengal
Varkey, M.J.; Sastry, J.S. (Indian Society for Physical Sciences of the Oceans, 1992)Temperature-salinity structures in the inner part of Bay of Bengal showed complete mixing processes in the upper bay, less than about 600 m can be characterisEd. by a mixing triangle constitutEd. by three characteristic ... -
Controlling 'new genes'- Letter
Varkey, M.J. (NISCAIR, CSIR, 1997) -
Current measurements off Bombay during March 1976
Varkey, M.J.; Premchand, K.; Sastry, J.S. (Indian Association for Limnology and Oceanography, 1978) -
Development of summer monsoon and onset of continuous rains over central west coast of India
Varkey, M.J. (Andhra University, 2005)A new interpretation of the start of summer monsoon along central west coast of India is presented in this paper. Many authors misinterpret onset of continuous rains as start of summer monsoon front, These two are different ... -
Effect of attenuation correction on surface amplitude distribution of wind waves
Varkey, M.J. (National Institute of Oceanography, Goa, 1987)Some selected wave profiles recorded using a ship borne wave recorder are analysed to study the effect of attenuation correction on the distribution of the surface amplitudes. A new spectral width parameter is defined to ... -
Effect of phase coupling on surface amplitude distribution of wind waves
Varkey, M.J. (CSIR-NISCAIR, 1988)Nonlinear features of wind generated surface waves are considered here to be caused by nonrandomness (non-Uniform) in the phase spectrum. Nonrandomness in recorded waves, if present, would be generally obscured within the ... -
Estimates of run off, evaporation and precipitation for the Bay of Bengal on seasonal basis
Varkey, M.J.; Sastry, J.S. (Indian Society for Physical Sciences of the Oceans, 1992)Mean seasonal river discharge rates (R) of the major rivers along the east coast of India, Bangla Desh and Burma; evaporation rates (E) computed for 5 degrees lat-long. Squares from data on heat loss and mean yearly ... -
Estimates of vertical velocities and eddy coefficients in the Bay of Bengal
Varkey, M.J.; Sastry, J.S. (Indian Society for Physical Sciences of the Oceans, 1992)Vertical velocities and eddy coefficients in the intermediate depths of the Bay of Bengal are calculated from mean hydrographic data for 300 miles-squares. The linear current density (sigma- O) versus log-depth plots show ... -
Falling standards of research in India
Varkey, M.J. (Indian Academy of Sciences, 2004)Some points related to falling standards of research in India are discussed. The necessity for scientists to compete by publishing in international journals of high I. F.s (Impact Factor) is stressed. India lacks pioneers ... -
IMD's model for forecasting monsoon in India
Varkey, M.J. (Indian Academy of Sciences, 2003)A few comments are presented on IMD's model for forecasting mean seasonal rainfall for India in the context of its failure during 2002. From published data it is pointed out that seasonal (summer) rainfalls are normally ... -
Interpretation of nonlinearity in wind generated ocean surface waves
Varkey, M.J. (NISCAIR, New Delhi, 1993)This study attempts to resolve a mix-up between a physical process and its mathematical interpretation in the context of wind waves on ocean surface. Wind generated wave systems, are conventionally interpreted as a result ... -
Killer storms from the seas
Varkey, M.J. (NISCAIR, CSIR, 1997)The author has discussed the distruction taking place due to cyclone in the Indian subcontinent of formation which is said to be the result of thermal fronts in the atmosphere and sea interaction of different air masses ... -
Light transmission characteristics of the Northern Arabian Sea during December-May
Varkey, M.J.; Das, V.K. (CSIR-NISCAIR, 1976) -
Mean turbulent mixing properties in the thermocline layer of the Bay of Bengal
Varkey, M.J. (CWPRS, Pune, 1994) -
Micro-fluctuations of temperature and salinity in the Gulf of Kutch
Varkey, M.J.; Sarma, R.V.; Nagarajan, R. (Indian Association for Limnology and Oceanography, 1977) -
Numerical simulation of wind wave surface profiles with tuned phase spectra
Varkey, M.J. (CSIR-NISCAIR, 1989)It is known that the phases of the individual harmonic components in a linear narrow band wave spectrum are uniformly random. It has been suggested by some workers that some sort of phase coupling and `locking' between the ... -
Ocean wave nonlinearity and phase couplings
Varkey, M.J. (NISCAIR, New Delhi, 1991)Bispectrum of a swell dominated sea state is computed using Fourier coefficients from an original record and from simulated Fourier coefficients using pseudorandom (uniform) phase spectrum. The differences in the bispectra ... -
Phase spectral composition of wind generated ocean surface waves
Varkey, M.J. (CSIR-NISCAIR, 1988)A study of the composition of the phase spectra of wind generated ocean surface waves is carried out using wave records collected employing a ship borne wave recorder. It is found that the raw phase spectral estimates could ... -
Physical characteristics of the Laccadive sea (Lakshadweep)
Varkey, M.J.; Das, V.K.; RamaRaju, D.V. (CSIR-NISCAIR, 1979)Vertical profiles of currents of the coastal waters between Navapur and Umbharat were analysed. Dynamic stability as well as the diffusion capacity of the water columns were estimated from the vertical distribution of ...