regional groups based on the mean sea level pressure and total cloud amount variations. Thermodynamic parameters in the three regions showed the following.
The LCL heights in the region-I was above 963 hPa whereas they were below 963 hPa in the region II and III.
Mixed layer heights associated with constancy of qv varied between 910 – 980 hPa.
In region I, qe, qes and P* profiles showed presence of stable layers in the lower MBL and medium clouds between 850-500 hPa. qe-q diagrams showed multiple mixing lines.
In region II, qe & qes vertical profiles showed low and upper level instability. qe is nearly constant with height which implies falling precipitation at the time of observation. In this case single mixing line structure is observed.
In region III also qe and qes curves showed low level stability and formation of shallow clouds in the middle troposphere. These features were very well supported by the P* profiles. Double mixing line structure is clearly evident from all the qe – q diagrams.
23. An experimental setup onboard INS Sagar Dhwani to measure the surface radiative fluxes over the Bay of Bengal during BOBMEX-99
G. Bharathi, A. Ravi Kumar, G. Nageswara Rao & K. Gopala Reddy, Dept. Meteorology and Oceanography, Andhra University.
Measurement of 4 fluxes of radiation (SW¯, SW, LW¯, LW) were carried out onboard INS Sagar Dhwani during BOBMEX-99 using an Albedometer, Net Pyrgeometer, data logger and a PC.
All precautions were taken for obtaining quality data. The data collected was found to be in good agreement with that collected onboard ORV Sagar Kanya during the inter-comparison days. It was implied that the data could be used without further corrections.
24 BOBMEX Ocean Component - an overview
V. Ramesh Babu, V.S.N. Murty and L.V.G. Rao, National Institute of Oceanography, Goa.
Oceanographic sections off Paradip and Chennai coasts; along 88.5°E and time-series sections at TS2 (17.5°N, 89°E) for the parameters of temperature, salinity, density, percentage light transmission and chlorophyll in the upper 100 m were presented and discussed.
Opposite coastal processes (sinking off Paradip and upwelling off Chennai) were noticed. Flow across meridional section (88.5°E) was dominantly eastward.