NOPR Collection:

Particulate carbohydrates in the Bay of Bengal

2016-12-08T10:49:11Z

Title: Particulate carbohydrates in the Bay of Bengal Authors: Bhosle, N B; Nandakumar, K; Venkat, K Abstract: Particulate matter collected from 77 water samples over a 3000 m water column was analyzed for particulate carbohydrates (PCHO). PCHO in the surface waters ranged from 43 to 143 µg.l^-1, and below 250 m it was 16 < PCHO showed large variations at all the depths and decreased with depth. PCHO values were higher than those reported from the other oceanic regions. Despite this, PCHO demonstrated similar depth gradient as observed in other oceanic waters. Page(s): 71-72

Summer monsoonal heat balance for upper central equatorial Indian Ocean

2016-12-08T10:46:37Z

Title: Summer monsoonal heat balance for upper central equatorial Indian Ocean Authors: Babu, V Ramesh; Gopalakrishna, V V; Rao, M V; Sastry, J S Abstract: Using the data obtained at 3 h interval during summer monsoon days {25-31 July 1977), the time history of the surface heat balance parameters of the central equatorial Indian Ocean (2ᵒN to 2ᵒS; 76ᵒ to 80ᵒE) is examined on a shorter time scale. A general increase in the heat content of the upper 200 m water column at an average rate of about 900 W.m^-2 is mainly attributed to the oceanic interior (advection) processes. A simple heat budget model is adopted to compute the advection rates whose orders are found comparable with those of observed currents near the study area. Page(s): 66-70

Short term responses in ocean thermal characteristics during winter to atmospheric forcing and advection off Bombay, west coast of India

2016-12-08T10:37:08Z

Title: Short term responses in ocean thermal characteristics during winter to atmospheric forcing and advection off Bombay, west coast of India Authors: Joseph, M G; Kumar, P V Hareesh Abstract: The observed variability of meteorological forcing parameters and ocean thermal characteristics was examined in relation to MLD(mixed layer depth) and heat content based on time series data collected off Bombay during winter at 2 sites(deep and shallow) and vertical temperature sections. Both surface meteorological forcing and thermal variability were predominantly of semidiurnal and intra-semidiurnal periods. Delay for MLD shoaling and deepening in response to hearing and wind stirring was more at deep site. Increased thermal variability and inversions between 80 and 150m characterised the deep site on the slope while well mixed warmer waters were present at shallow site on the shelf Differential heat advection of cold and warm waters above and below 80m at deep site and progressive mild cooling of shelf waters at shallow site were supported by probable warm and cold core eddy interaction and tidal flows. Page(s): 60-65

Diurnal variation in salinity and currents in Vasishta Godavary estuary, east coast of India

2016-12-08T10:33:38Z

Title: Diurnal variation in salinity and currents in Vasishta Godavary estuary, east coast of India Authors: Ramana, Y V; Rao, V Ranga; Reddy, B S R Abstract: Distribution of salinities and currents in Vasishta branch of Godavari estuarine system, in relation to the fresh water discharge and tides has been studied in 3 representative months. In July, when the' river discharge is very high, the estuary exhibits some characteristics of a salt wedge type. In September, when the river discharge is usually smaller compared to that during July, the estuary tends to become a partly mixed type while during February (river discharge being minimum) the estuary becomes a well mixed type. These features are well reflected in the hourly (for 12 h) observations of salinities and currents at the 3 selected stations and in the stratification - circulation diagram. Longitudinal exchange coefficients show a decreasing trend with decrease in the fresh water discharge and with the increase in the distance from the mouth upstream. Page(s): 54-59