Interpretation of the U.S.A. oceanographer sounding and radon data over the Arabian Sea during June 1967

U.S.A. 'Oceanographer' sounding and radon data during June 1967 have been discussed with reference to the synoptic charts. During the period 14 to 21 June, there was above the surface layer of maritime air, less moist air with nearly saturation adiabatic lapse from the south Arabian Sea instead of the dry continental air from northeast Africa and Arabia. The 'Oceanographer' soundings compare well with those at Bombay, if one keeps in mind the effect of the Ghats for the latter location. The radon data show that there was presence of the maritime air from across the equator, which had got mixed to some extent with continental air from northeast Africa and Arabia; the high radon values off Saurashtra-Konkan were not due to vertical mixing of the lower maritime air with the upper continental air. (author)