1994 Earth and Planetary Sciences

Proceedings of the Indian Academy of Sciences
Earth and Planetary Sciences

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Vol. 103, January-December 1994
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Contents

March 1, 1994	Pages
A critical analysis of processes governing the nutrient profiles in the ocean — R. Ramesh and D. Lal	1-15
A two-stage evolution of Visakhapatnam-Paradip shelf, east coast of India, from magnetic studies — A. S. Subrahmanyam, K. S. R. Murthy, T. C. S. Rao, M. M. Malleswara Rao, S. Lakshminarayana and K. Venkateswarlu	17-26
Effects of transient uplift erosion on the surface heat flow and heat generation relationship in presence of small scale asthenospheric convection — D. V. Ramanand, R. N. Singh	27-36
Structural set up in northern part of Kumaun Himalaya — L. S. Chamyal and Manudip Kaur	37-46
Seasonal variation in temperature and salinity in the Gautami-Godavari estuary — B. S. R .Reddy and V. Ranga Rao	47-55
Isotopic analysis of early solar system objects by an ion microprobe: Parametric studies and initial results — J. N. Goswami and G. Srinivasan	57-82
New age constraints on the cooling and unroofing history of the Trans-Himalayan Ladakh Batholith (Kargil area), NW India —Rasoul B. Sorkhabi, Arvind K. Jain, Susumu Nishimura, Tetsumaru Itaya, Nand Lal, R. M. Manickavasagam, Takahiro Tagami	83-97
June 2, 1994
Biogeochemistry of the Arabian Sea: Present information and gaps	99-106
Circulation and water masses of the Arabian Sea — S. R. Shetye, A. D. Gouveia and S. C. Shenoi	107-123
On the coupling of hydrography, phytoplankton, zooplankton, and settling organic particles offshore in the Arabian Sea — K. Banse	125-161
A model study of seasonal mixed-layer primary production in the Arabian Sea — John Brock, Shubha Sathyendranath and Trevor Patil	163-176
New production and mixed-layer physics — Shubha Sathyendranath and Trevor Patil	177-188
Fluxes of material in the Arabian Sea and Bay of Bengal - Sediment trap studies — V. Ramaswamy and R. R. Nair	189-210
Natural radionuclides in the Arabian Sea and Bay of Bengal: Distribution and evaluation of particle scavenging processes — M. M. Sarin, R. Rengarajan and B. L. K. Somayajulu	211-235
The biogeochemical distribution of trace elements in the Indian Ocean — Paul M. Saager	237-278
Denitrification processes in the Arabian Sea — S. W. A. Naqvi	279-300
Context of the suboxic layer in the Arabian Sea — Bruce A. Warren	301-314
Recent sedimentary records from the Arabian Sea — B. L. K. Somayajulu, D. N. Yadav and M. M. Sarin	315-327
Air-sea exchange of CO2 in the Gulf of Kutch, northern Arabian Sea based on bomb-carbon in corals and tree rings — S. Chakraborty, R. Ramesh and S. Krishnaswami	329-340
Significance of bacteria in carbon fluxes in the Arabian Sea — Farooq Azam, Grieg F. Steward, David C. Smith and Hugh W. Ducklow	341-351
September 3, 1994
Surface sensible heat flux over a deep moist convective region and its interplay with synoptic and mesoscale features — R. Pradhan, U. K De and P. K. Sen	353-367
The interannual variability of mid-latitude meridional circulation and its teleconnection with Indian monsoon activity — J. Chattopadhyay and R. Bhatla	369-382
Geomagnetic depth sounding over the Singhbhum and the surrounding regions of eastern India — A. N. Hanchinal, P. B. V. Subba Rao,Nandini Nagarajan, D. R. K. Rao and B. P. Singh	383-400
Minimum norm inversion of observed ground elevation changes for slips on the causative fault during the 1905 Kangra earthquake — V. K. Gahalaut, P. K. Gupta, R. Chander and V. K. Gaur	401-411
Evaluating U-Pb Zircon data using a 3-dimensional concordia — M. Wiedenbeck	413-424
Rb-Sr age of the Sivamalai alkaline complex, Tamil Nadu — T. V. Subba Rao, B. L. Narayana and K. Gopalan	425-437
December 4, 1994
Singular spectral analysis of homogeneous Indian monsoon (HIM) rainfall — G. K. Rangarajan	439-448
Incipient vortex size-dependent evolution of tropical disturbances Part-II: Some governing processes — R. Koteswar Rao and P. Goswami	449-468
Spectral analysis of monsoonal global energy and enstrophy and their nonlinear exchanges in the zonal wavenumber domain — S. S. Desai and S. K. Mishra	469-488
Some aspects on the variations in depositional flux of excess Thorium-230 in the Central Indian basin during Late Quaternary — N. P. Sukumaran	489-497
Pleistocene oceanographic changes indicated by deep sea benthic foraminifera in the northern Indian Ocean — Ajai K. Rai and M. S. Srinivasan	499-517